Início
Produtos
OpenShift Container Platform
4.21
Edge computing
Chapter 7. Recommended single-node OpenShift cluster configuration for vDU application workloads

Este conteúdo não está disponível no idioma selecionado.

Chapter 7. Recommended single-node OpenShift cluster configuration for vDU application workloads

Use the following reference information to understand the single-node OpenShift configurations required to deploy virtual distributed unit (vDU) applications in the cluster. Configurations include cluster optimizations for high performance workloads, enabling workload partitioning, and minimizing the number of reboots required postinstallation.

7.1. Running low latency applications on OpenShift Container Platform
Copiar o link

OpenShift Container Platform enables low latency processing for applications running on commercial off-the-shelf (COTS) hardware by using several technologies and specialized hardware devices:

Real-time kernel for RHCOS: Ensures workloads are handled with a high degree of process determinism.
CPU isolation: Avoids CPU scheduling delays and ensures CPU capacity is available consistently.
NUMA-aware topology management: Aligns memory and huge pages with CPU and PCI devices to pin guaranteed container memory and huge pages to the non-uniform memory access (NUMA) node. Pod resources for all Quality of Service (QoS) classes stay on the same NUMA node. This decreases latency and improves performance of the node.
Huge pages memory management: Using huge page sizes improves system performance by reducing the amount of system resources required to access page tables.
Precision timing synchronization using PTP: Allows synchronization between nodes in the network with sub-microsecond accuracy.

7.2. Recommended cluster host requirements for vDU application workloads
Copiar o link

Running vDU application workloads requires a bare-metal host with sufficient resources to run OpenShift Container Platform services and production workloads.

Expand

Table 7.1. Minimum resource requirements
Profile	vCPU	Memory	Storage
Minimum	4 to 8 vCPU	32GB of RAM	120GB

Note

One vCPU equals one physical core. However, if you enable simultaneous multithreading (SMT), or Hyper-Threading, use the following formula to calculate the number of vCPUs that represent one physical core:

(threads per core × cores) × sockets = vCPUs

Important

The server must have a Baseboard Management Controller (BMC) when booting with virtual media.

7.3. Configuring host firmware for low latency and high performance
Copiar o link

Bare-metal hosts require the firmware to be configured before the host can be provisioned. The firmware configuration is dependent on the specific hardware and the particular requirements of your installation.

Procedure

Set the UEFI/BIOS Boot Mode to UEFI.
In the host boot sequence order, set Hard drive first.

Apply the specific firmware configuration for your hardware. The following table describes a representative firmware configuration for an Intel Xeon Skylake server and later hardware generations, based on the Intel FlexRAN 4G and 5G baseband PHY reference design.

Important

The exact firmware configuration depends on your specific hardware and network requirements. The following sample configuration is for illustrative purposes only.

Expand

Table 7.2. Sample firmware configuration
Firmware setting	Configuration
CPU Power and Performance Policy	Performance
Uncore Frequency Scaling	Disabled
Performance P-limit	Disabled
Enhanced Intel SpeedStep ® Tech	Enabled
Intel Configurable TDP	Enabled
Configurable TDP Level	Level 2
Intel® Turbo Boost Technology	Enabled
Energy Efficient Turbo	Disabled
Hardware P-States	Disabled
Package C-State	C0/C1 state
C1E	Disabled
Processor C6	Disabled

Note

Enable global SR-IOV and VT-d settings in the firmware for the host. These settings are relevant to bare-metal environments.

7.4. Connectivity prerequisites for managed cluster networks
Copiar o link

Before you can install and provision a managed cluster with the GitOps Zero Touch Provisioning (ZTP) pipeline, the managed cluster host must meet the following networking prerequisites:

There must be bi-directional connectivity between the GitOps ZTP container in the hub cluster and the Baseboard Management Controller (BMC) of the target bare-metal host.
The managed cluster must be able to resolve and reach the API hostname of the hub hostname and *.apps hostname. Here is an example of the API hostname of the hub and *.apps hostname:
- api.hub-cluster.internal.domain.com
- console-openshift-console.apps.hub-cluster.internal.domain.com
The hub cluster must be able to resolve and reach the API and *.apps hostname of the managed cluster. Here is an example of the API hostname of the managed cluster and *.apps hostname:
- api.sno-managed-cluster-1.internal.domain.com
- console-openshift-console.apps.sno-managed-cluster-1.internal.domain.com

7.5. Workload partitioning in single-node OpenShift with GitOps ZTP
Copiar o link

Workload partitioning configures OpenShift Container Platform services, cluster management workloads, and infrastructure pods to run on a reserved number of host CPUs.

To configure workload partitioning with GitOps Zero Touch Provisioning (ZTP), you configure a cpuPartitioningMode field in the ClusterInstance custom resource (CR) that you use to install the cluster and you apply a PerformanceProfile CR that configures the isolated and reserved CPUs on the host.

Configuring the ClusterInstance CR enables workload partitioning at cluster installation time and applying the PerformanceProfile CR configures the specific allocation of CPUs to reserved and isolated sets. Both of these steps happen at different points during cluster provisioning.

The workload partitioning configuration pins the OpenShift Container Platform infrastructure pods to the reserved CPU set. Platform services such as systemd, CRI-O, and kubelet run on the reserved CPU set. The isolated CPU sets are exclusively allocated to your container workloads. Isolating CPUs ensures that the workload has guaranteed access to the specified CPUs without contention from other applications running on the same node. All CPUs that are not isolated should be reserved.

Important

Ensure that reserved and isolated CPU sets do not overlap with each other.

7.6. Recommended cluster install manifests
Copiar o link

The ZTP pipeline applies the following custom resources (CRs) during cluster installation. These configuration CRs ensure that the cluster meets the feature and performance requirements necessary for running a vDU application.

Note

When using the GitOps ZTP plugin and ClusterInstance CRs for cluster deployment, the following MachineConfig CRs are included by default.

Use the ClusterInstance extraManifestRefs to alter the CRs that are included by default. For more information, see Advanced managed cluster configuration with ClusterInstance CRs.

7.6.1. Reduced platform management footprint
Copiar o link

To reduce the overall management footprint of the platform, a MachineConfig custom resource (CR) is required that places all Kubernetes-specific mount points in a new namespace separate from the host operating system. The following base64-encoded example MachineConfig CR illustrates this configuration.

Recommended container mount namespace configuration (01-container-mount-ns-and-kubelet-conf-master.yaml)

# Automatically generated by extra-manifests-builder
# Do not make changes directly.
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: master
  name: container-mount-namespace-and-kubelet-conf-master
spec:
  config:
    ignition:
      version: 3.2.0
    storage:
      files:
        - contents:
            source: data:text/plain;charset=utf-8;base64,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
          mode: 493
          path: /usr/local/bin/extractExecStart
        - contents:
            source: data:text/plain;charset=utf-8;base64,IyEvYmluL2Jhc2gKbnNlbnRlciAtLW1vdW50PS9ydW4vY29udGFpbmVyLW1vdW50LW5hbWVzcGFjZS9tbnQgIiRAIgo=
          mode: 493
          path: /usr/local/bin/nsenterCmns
    systemd:
      units:
        - contents: |
            [Unit]
            Description=Manages a mount namespace that both kubelet and crio can use to share their container-specific mounts

            [Service]
            Type=oneshot
            RemainAfterExit=yes
            RuntimeDirectory=container-mount-namespace
            Environment=RUNTIME_DIRECTORY=%t/container-mount-namespace
            Environment=BIND_POINT=%t/container-mount-namespace/mnt
            ExecStartPre=bash -c "findmnt ${RUNTIME_DIRECTORY} || mount --make-unbindable --bind ${RUNTIME_DIRECTORY} ${RUNTIME_DIRECTORY}"
            ExecStartPre=touch ${BIND_POINT}
            ExecStart=unshare --mount=${BIND_POINT} --propagation slave mount --make-rshared /
            ExecStop=umount -R ${RUNTIME_DIRECTORY}
          name: container-mount-namespace.service
        - dropins:
            - contents: |
                [Unit]
                Wants=container-mount-namespace.service
                After=container-mount-namespace.service

                [Service]
                ExecStartPre=/usr/local/bin/extractExecStart %n /%t/%N-execstart.env ORIG_EXECSTART
                EnvironmentFile=-/%t/%N-execstart.env
                ExecStart=
                ExecStart=bash -c "nsenter --mount=%t/container-mount-namespace/mnt \
                    ${ORIG_EXECSTART}"
              name: 90-container-mount-namespace.conf
          name: crio.service
        - dropins:
            - contents: |
                [Unit]
                Wants=container-mount-namespace.service
                After=container-mount-namespace.service

                [Service]
                ExecStartPre=/usr/local/bin/extractExecStart %n /%t/%N-execstart.env ORIG_EXECSTART
                EnvironmentFile=-/%t/%N-execstart.env
                ExecStart=
                ExecStart=bash -c "nsenter --mount=%t/container-mount-namespace/mnt \
                    ${ORIG_EXECSTART} --housekeeping-interval=30s"
              name: 90-container-mount-namespace.conf
            - contents: |
                [Service]
                Environment="OPENSHIFT_MAX_HOUSEKEEPING_INTERVAL_DURATION=60s"
                Environment="OPENSHIFT_EVICTION_MONITORING_PERIOD_DURATION=30s"
              name: 30-kubelet-interval-tuning.conf
          name: kubelet.service

# Automatically generated by extra-manifests-builder
# Do not make changes directly.
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: master
  name: container-mount-namespace-and-kubelet-conf-master
spec:
  config:
    ignition:
      version: 3.2.0
    storage:
      files:
        - contents:
            source: data:text/plain;charset=utf-8;base64,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
          mode: 493
          path: /usr/local/bin/extractExecStart
        - contents:
            source: data:text/plain;charset=utf-8;base64,IyEvYmluL2Jhc2gKbnNlbnRlciAtLW1vdW50PS9ydW4vY29udGFpbmVyLW1vdW50LW5hbWVzcGFjZS9tbnQgIiRAIgo=
          mode: 493
          path: /usr/local/bin/nsenterCmns
    systemd:
      units:
        - contents: |
            [Unit]
            Description=Manages a mount namespace that both kubelet and crio can use to share their container-specific mounts

            [Service]
            Type=oneshot
            RemainAfterExit=yes
            RuntimeDirectory=container-mount-namespace
            Environment=RUNTIME_DIRECTORY=%t/container-mount-namespace
            Environment=BIND_POINT=%t/container-mount-namespace/mnt
            ExecStartPre=bash -c "findmnt ${RUNTIME_DIRECTORY} || mount --make-unbindable --bind ${RUNTIME_DIRECTORY} ${RUNTIME_DIRECTORY}"
            ExecStartPre=touch ${BIND_POINT}
            ExecStart=unshare --mount=${BIND_POINT} --propagation slave mount --make-rshared /
            ExecStop=umount -R ${RUNTIME_DIRECTORY}
          name: container-mount-namespace.service
        - dropins:
            - contents: |
                [Unit]
                Wants=container-mount-namespace.service
                After=container-mount-namespace.service

                [Service]
                ExecStartPre=/usr/local/bin/extractExecStart %n /%t/%N-execstart.env ORIG_EXECSTART
                EnvironmentFile=-/%t/%N-execstart.env
                ExecStart=
                ExecStart=bash -c "nsenter --mount=%t/container-mount-namespace/mnt \
                    ${ORIG_EXECSTART}"
              name: 90-container-mount-namespace.conf
          name: crio.service
        - dropins:
            - contents: |
                [Unit]
                Wants=container-mount-namespace.service
                After=container-mount-namespace.service

                [Service]
                ExecStartPre=/usr/local/bin/extractExecStart %n /%t/%N-execstart.env ORIG_EXECSTART
                EnvironmentFile=-/%t/%N-execstart.env
                ExecStart=
                ExecStart=bash -c "nsenter --mount=%t/container-mount-namespace/mnt \
                    ${ORIG_EXECSTART} --housekeeping-interval=30s"
              name: 90-container-mount-namespace.conf
            - contents: |
                [Service]
                Environment="OPENSHIFT_MAX_HOUSEKEEPING_INTERVAL_DURATION=60s"
                Environment="OPENSHIFT_EVICTION_MONITORING_PERIOD_DURATION=30s"
              name: 30-kubelet-interval-tuning.conf
          name: kubelet.service

Copy to Clipboard

Toggle word wrap

7.6.2. SCTP
Copiar o link

Stream Control Transmission Protocol (SCTP) is a key protocol used in RAN applications. This MachineConfig object adds the SCTP kernel module to the node to enable this protocol.

Recommended control plane node SCTP configuration (03-sctp-machine-config-master.yaml)

# Automatically generated by extra-manifests-builder
# Do not make changes directly.
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: master
  name: load-sctp-module-master
spec:
  config:
    ignition:
      version: 2.2.0
    storage:
      files:
        - contents:
            source: data:,
            verification: {}
          filesystem: root
          mode: 420
          path: /etc/modprobe.d/sctp-blacklist.conf
        - contents:
            source: data:text/plain;charset=utf-8,sctp
          filesystem: root
          mode: 420
          path: /etc/modules-load.d/sctp-load.conf

# Automatically generated by extra-manifests-builder
# Do not make changes directly.
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: master
  name: load-sctp-module-master
spec:
  config:
    ignition:
      version: 2.2.0
    storage:
      files:
        - contents:
            source: data:,
            verification: {}
          filesystem: root
          mode: 420
          path: /etc/modprobe.d/sctp-blacklist.conf
        - contents:
            source: data:text/plain;charset=utf-8,sctp
          filesystem: root
          mode: 420
          path: /etc/modules-load.d/sctp-load.conf

Copy to Clipboard

Toggle word wrap

Recommended worker node SCTP configuration (03-sctp-machine-config-worker.yaml)

# Automatically generated by extra-manifests-builder
# Do not make changes directly.
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: worker
  name: load-sctp-module-worker
spec:
  config:
    ignition:
      version: 2.2.0
    storage:
      files:
        - contents:
            source: data:,
            verification: {}
          filesystem: root
          mode: 420
          path: /etc/modprobe.d/sctp-blacklist.conf
        - contents:
            source: data:text/plain;charset=utf-8,sctp
          filesystem: root
          mode: 420
          path: /etc/modules-load.d/sctp-load.conf

# Automatically generated by extra-manifests-builder
# Do not make changes directly.
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: worker
  name: load-sctp-module-worker
spec:
  config:
    ignition:
      version: 2.2.0
    storage:
      files:
        - contents:
            source: data:,
            verification: {}
          filesystem: root
          mode: 420
          path: /etc/modprobe.d/sctp-blacklist.conf
        - contents:
            source: data:text/plain;charset=utf-8,sctp
          filesystem: root
          mode: 420
          path: /etc/modules-load.d/sctp-load.conf

Copy to Clipboard

Toggle word wrap

7.6.3. Setting rcu_normal
Copiar o link

The following MachineConfig CR configures the system to set rcu_normal to 1 after the system has finished startup. This improves kernel latency for vDU applications.

Recommended configuration for disabling rcu_expedited after the node has finished startup (08-set-rcu-normal-master.yaml)

# Automatically generated by extra-manifests-builder
# Do not make changes directly.
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: master
  name: 08-set-rcu-normal-master
spec:
  config:
    ignition:
      version: 3.2.0
    storage:
      files:
        - contents:
            source: data:text/plain;charset=utf-8;base64,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
          mode: 493
          path: /usr/local/bin/set-rcu-normal.sh
    systemd:
      units:
        - contents: |
            [Unit]
            Description=Disable rcu_expedited after node has finished booting by setting rcu_normal to 1

            [Service]
            Type=simple
            ExecStart=/usr/local/bin/set-rcu-normal.sh

            # Maximum wait time is 600s = 10m:
            Environment=MAXIMUM_WAIT_TIME=600

            # Steady-state threshold = 2%
            # Allowed values:
            #  4  - absolute pod count (+/-)
            #  4% - percent change (+/-)
            #  -1 - disable the steady-state check
            # Note: '%' must be escaped as '%%' in systemd unit files
            Environment=STEADY_STATE_THRESHOLD=2%%

            # Steady-state window = 120s
            # If the running pod count stays within the given threshold for this time
            # period, return CPU utilization to normal before the maximum wait time has
            # expires
            Environment=STEADY_STATE_WINDOW=120

            # Steady-state minimum = 40
            # Increasing this will skip any steady-state checks until the count rises above
            # this number to avoid false positives if there are some periods where the
            # count doesn't increase but we know we can't be at steady-state yet.
            Environment=STEADY_STATE_MINIMUM=40

            [Install]
            WantedBy=multi-user.target
          enabled: true
          name: set-rcu-normal.service

# Automatically generated by extra-manifests-builder
# Do not make changes directly.
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: master
  name: 08-set-rcu-normal-master
spec:
  config:
    ignition:
      version: 3.2.0
    storage:
      files:
        - contents:
            source: data:text/plain;charset=utf-8;base64,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
          mode: 493
          path: /usr/local/bin/set-rcu-normal.sh
    systemd:
      units:
        - contents: |
            [Unit]
            Description=Disable rcu_expedited after node has finished booting by setting rcu_normal to 1

            [Service]
            Type=simple
            ExecStart=/usr/local/bin/set-rcu-normal.sh

            # Maximum wait time is 600s = 10m:
            Environment=MAXIMUM_WAIT_TIME=600

            # Steady-state threshold = 2%
            # Allowed values:
            #  4  - absolute pod count (+/-)
            #  4% - percent change (+/-)
            #  -1 - disable the steady-state check
            # Note: '%' must be escaped as '%%' in systemd unit files
            Environment=STEADY_STATE_THRESHOLD=2%%

            # Steady-state window = 120s
            # If the running pod count stays within the given threshold for this time
            # period, return CPU utilization to normal before the maximum wait time has
            # expires
            Environment=STEADY_STATE_WINDOW=120

            # Steady-state minimum = 40
            # Increasing this will skip any steady-state checks until the count rises above
            # this number to avoid false positives if there are some periods where the
            # count doesn't increase but we know we can't be at steady-state yet.
            Environment=STEADY_STATE_MINIMUM=40

            [Install]
            WantedBy=multi-user.target
          enabled: true
          name: set-rcu-normal.service

Copy to Clipboard

Toggle word wrap

7.6.4. Automatic kernel crash dumps with kdump
Copiar o link

kdump is a Linux kernel feature that creates a kernel crash dump when the kernel crashes. kdump is enabled with the following MachineConfig CRs.

Recommended control plane node kdump configuration (06-kdump-master.yaml)

# Automatically generated by extra-manifests-builder
# Do not make changes directly.
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: master
  name: 06-kdump-enable-master
spec:
  config:
    ignition:
      version: 3.2.0
    systemd:
      units:
        - enabled: true
          name: kdump.service
  kernelArguments:
    - crashkernel=512M

# Automatically generated by extra-manifests-builder
# Do not make changes directly.
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: master
  name: 06-kdump-enable-master
spec:
  config:
    ignition:
      version: 3.2.0
    systemd:
      units:
        - enabled: true
          name: kdump.service
  kernelArguments:
    - crashkernel=512M

Copy to Clipboard

Toggle word wrap

Recommended kdump worker node configuration (06-kdump-worker.yaml)

# Automatically generated by extra-manifests-builder
# Do not make changes directly.
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: worker
  name: 06-kdump-enable-worker
spec:
  config:
    ignition:
      version: 3.2.0
    systemd:
      units:
        - enabled: true
          name: kdump.service
  kernelArguments:
    - crashkernel=512M

# Automatically generated by extra-manifests-builder
# Do not make changes directly.
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: worker
  name: 06-kdump-enable-worker
spec:
  config:
    ignition:
      version: 3.2.0
    systemd:
      units:
        - enabled: true
          name: kdump.service
  kernelArguments:
    - crashkernel=512M

Copy to Clipboard

Toggle word wrap

7.6.5. Disable automatic CRI-O cache wipe
Copiar o link

After an uncontrolled host shutdown or cluster reboot, CRI-O automatically deletes the entire CRI-O cache, causing all images to be pulled from the registry when the node reboots. This can result in unacceptably slow recovery times or recovery failures. To prevent this from happening in single-node OpenShift clusters that you install with GitOps ZTP, disable the CRI-O delete cache feature during cluster installation.

Recommended MachineConfig CR to disable CRI-O cache wipe on control plane nodes (99-crio-disable-wipe-master.yaml)

# Automatically generated by extra-manifests-builder
# Do not make changes directly.
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: master
  name: 99-crio-disable-wipe-master
spec:
  config:
    ignition:
      version: 3.2.0
    storage:
      files:
        - contents:
            source: data:text/plain;charset=utf-8;base64,W2NyaW9dCmNsZWFuX3NodXRkb3duX2ZpbGUgPSAiIgo=
          mode: 420
          path: /etc/crio/crio.conf.d/99-crio-disable-wipe.toml

# Automatically generated by extra-manifests-builder
# Do not make changes directly.
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: master
  name: 99-crio-disable-wipe-master
spec:
  config:
    ignition:
      version: 3.2.0
    storage:
      files:
        - contents:
            source: data:text/plain;charset=utf-8;base64,W2NyaW9dCmNsZWFuX3NodXRkb3duX2ZpbGUgPSAiIgo=
          mode: 420
          path: /etc/crio/crio.conf.d/99-crio-disable-wipe.toml

Copy to Clipboard

Toggle word wrap

Recommended MachineConfig CR to disable CRI-O cache wipe on worker nodes (99-crio-disable-wipe-worker.yaml)

# Automatically generated by extra-manifests-builder
# Do not make changes directly.
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: worker
  name: 99-crio-disable-wipe-worker
spec:
  config:
    ignition:
      version: 3.2.0
    storage:
      files:
        - contents:
            source: data:text/plain;charset=utf-8;base64,W2NyaW9dCmNsZWFuX3NodXRkb3duX2ZpbGUgPSAiIgo=
          mode: 420
          path: /etc/crio/crio.conf.d/99-crio-disable-wipe.toml

# Automatically generated by extra-manifests-builder
# Do not make changes directly.
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: worker
  name: 99-crio-disable-wipe-worker
spec:
  config:
    ignition:
      version: 3.2.0
    storage:
      files:
        - contents:
            source: data:text/plain;charset=utf-8;base64,W2NyaW9dCmNsZWFuX3NodXRkb3duX2ZpbGUgPSAiIgo=
          mode: 420
          path: /etc/crio/crio.conf.d/99-crio-disable-wipe.toml

Copy to Clipboard

Toggle word wrap

7.6.6. Configuring crun as the default container runtime
Copiar o link

The following ContainerRuntimeConfig custom resources (CRs) configure crun as the default OCI container runtime for control plane and worker nodes. The crun container runtime is fast and lightweight and has a low memory footprint.

Important

For optimal performance, enable crun for control plane and worker nodes in single-node OpenShift, three-node OpenShift, and standard clusters. To avoid the cluster rebooting when the CR is applied, apply the change as a GitOps ZTP additional Day 0 install-time manifest.

Recommended ContainerRuntimeConfig CR for control plane nodes (enable-crun-master.yaml)

apiVersion: machineconfiguration.openshift.io/v1
kind: ContainerRuntimeConfig
metadata:
  name: enable-crun-master
spec:
  machineConfigPoolSelector:
    matchLabels:
      pools.operator.machineconfiguration.openshift.io/master: ""
  containerRuntimeConfig:
    defaultRuntime: crun

apiVersion: machineconfiguration.openshift.io/v1
kind: ContainerRuntimeConfig
metadata:
  name: enable-crun-master
spec:
  machineConfigPoolSelector:
    matchLabels:
      pools.operator.machineconfiguration.openshift.io/master: ""
  containerRuntimeConfig:
    defaultRuntime: crun

Copy to Clipboard

Toggle word wrap

Recommended ContainerRuntimeConfig CR for worker nodes (enable-crun-worker.yaml)

apiVersion: machineconfiguration.openshift.io/v1
kind: ContainerRuntimeConfig
metadata:
  name: enable-crun-worker
spec:
  machineConfigPoolSelector:
    matchLabels:
      pools.operator.machineconfiguration.openshift.io/worker: ""
  containerRuntimeConfig:
    defaultRuntime: crun

apiVersion: machineconfiguration.openshift.io/v1
kind: ContainerRuntimeConfig
metadata:
  name: enable-crun-worker
spec:
  machineConfigPoolSelector:
    matchLabels:
      pools.operator.machineconfiguration.openshift.io/worker: ""
  containerRuntimeConfig:
    defaultRuntime: crun

Copy to Clipboard

Toggle word wrap

7.7. Recommended postinstallation cluster configurations
Copiar o link

Additional resources

When the cluster installation is complete, the ZTP pipeline applies the following custom resources (CRs) that are required to run DU workloads.

Note

In GitOps ZTP v4.10 and earlier, you configure UEFI secure boot with a MachineConfig CR. This is no longer required in GitOps ZTP v4.11 and later. In v4.11, you configure UEFI secure boot for single-node OpenShift clusters by updating the spec.nodes[].bootMode field in the ClusterInstance CR that you use to install the cluster. For more information, see Deploying a managed cluster with ClusterInstance and GitOps ZTP.

7.7.1. Operators
Copiar o link

Single-node OpenShift clusters that run DU workloads require the following Operators to be installed:

Local Storage Operator
Logging Operator
PTP Operator
SR-IOV Network Operator

You also need to configure a custom CatalogSource CR, disable the default OperatorHub configuration, and configure an ImageContentSourcePolicy mirror registry that is accessible from the clusters that you install.

Recommended Storage Operator namespace and Operator group configuration (StorageNS.yaml, StorageOperGroup.yaml)

---
apiVersion: v1
kind: Namespace
metadata:
  name: openshift-local-storage
  annotations:
    workload.openshift.io/allowed: management
---
apiVersion: operators.coreos.com/v1
kind: OperatorGroup
metadata:
  name: openshift-local-storage
  namespace: openshift-local-storage
  annotations: {}
spec:
  targetNamespaces:
    - openshift-local-storage

---
apiVersion: v1
kind: Namespace
metadata:
  name: openshift-local-storage
  annotations:
    workload.openshift.io/allowed: management
---
apiVersion: operators.coreos.com/v1
kind: OperatorGroup
metadata:
  name: openshift-local-storage
  namespace: openshift-local-storage
  annotations: {}
spec:
  targetNamespaces:
    - openshift-local-storage

Copy to Clipboard

Toggle word wrap

Recommended Cluster Logging Operator namespace and Operator group configuration (ClusterLogNS.yaml, ClusterLogOperGroup.yaml)

---
apiVersion: v1
kind: Namespace
metadata:
  name: openshift-logging
  annotations:
    workload.openshift.io/allowed: management
---
apiVersion: operators.coreos.com/v1
kind: OperatorGroup
metadata:
  name: cluster-logging
  namespace: openshift-logging
  annotations: {}
spec:
  targetNamespaces:
    - openshift-logging

---
apiVersion: v1
kind: Namespace
metadata:
  name: openshift-logging
  annotations:
    workload.openshift.io/allowed: management
---
apiVersion: operators.coreos.com/v1
kind: OperatorGroup
metadata:
  name: cluster-logging
  namespace: openshift-logging
  annotations: {}
spec:
  targetNamespaces:
    - openshift-logging

Copy to Clipboard

Toggle word wrap

Recommended PTP Operator namespace and Operator group configuration (PtpSubscriptionNS.yaml, PtpSubscriptionOperGroup.yaml)

---
apiVersion: v1
kind: Namespace
metadata:
  name: openshift-ptp
  annotations:
    workload.openshift.io/allowed: management
  labels:
    openshift.io/cluster-monitoring: "true"
---
apiVersion: operators.coreos.com/v1
kind: OperatorGroup
metadata:
  name: ptp-operators
  namespace: openshift-ptp
  annotations: {}
spec:
  targetNamespaces:
    - openshift-ptp

---
apiVersion: v1
kind: Namespace
metadata:
  name: openshift-ptp
  annotations:
    workload.openshift.io/allowed: management
  labels:
    openshift.io/cluster-monitoring: "true"
---
apiVersion: operators.coreos.com/v1
kind: OperatorGroup
metadata:
  name: ptp-operators
  namespace: openshift-ptp
  annotations: {}
spec:
  targetNamespaces:
    - openshift-ptp

Copy to Clipboard

Toggle word wrap

Recommended SR-IOV Operator namespace and Operator group configuration (SriovSubscriptionNS.yaml, SriovSubscriptionOperGroup.yaml)

---
apiVersion: v1
kind: Namespace
metadata:
  name: openshift-sriov-network-operator
  annotations:
    workload.openshift.io/allowed: management
---
apiVersion: operators.coreos.com/v1
kind: OperatorGroup
metadata:
  name: sriov-network-operators
  namespace: openshift-sriov-network-operator
  annotations: {}
spec:
  targetNamespaces:
    - openshift-sriov-network-operator

---
apiVersion: v1
kind: Namespace
metadata:
  name: openshift-sriov-network-operator
  annotations:
    workload.openshift.io/allowed: management
---
apiVersion: operators.coreos.com/v1
kind: OperatorGroup
metadata:
  name: sriov-network-operators
  namespace: openshift-sriov-network-operator
  annotations: {}
spec:
  targetNamespaces:
    - openshift-sriov-network-operator

Copy to Clipboard

Toggle word wrap

Recommended CatalogSource configuration (DefaultCatsrc.yaml)

apiVersion: operators.coreos.com/v1alpha1
kind: CatalogSource
metadata:
  name: default-cat-source
  namespace: openshift-marketplace
  annotations:
    target.workload.openshift.io/management: '{"effect": "PreferredDuringScheduling"}'
spec:
  displayName: default-cat-source
  image: $imageUrl
  publisher: Red Hat
  sourceType: grpc
  updateStrategy:
    registryPoll:
      interval: 1h
status:
  connectionState:
    lastObservedState: READY

apiVersion: operators.coreos.com/v1alpha1
kind: CatalogSource
metadata:
  name: default-cat-source
  namespace: openshift-marketplace
  annotations:
    target.workload.openshift.io/management: '{"effect": "PreferredDuringScheduling"}'
spec:
  displayName: default-cat-source
  image: $imageUrl
  publisher: Red Hat
  sourceType: grpc
  updateStrategy:
    registryPoll:
      interval: 1h
status:
  connectionState:
    lastObservedState: READY

Copy to Clipboard

Toggle word wrap

Recommended ImageContentSourcePolicy configuration (DisconnectedICSP.yaml)

apiVersion: operator.openshift.io/v1alpha1
kind: ImageContentSourcePolicy
metadata:
  name: disconnected-internal-icsp
  annotations: {}
spec:
#    repositoryDigestMirrors:
#    - $mirrors

apiVersion: operator.openshift.io/v1alpha1
kind: ImageContentSourcePolicy
metadata:
  name: disconnected-internal-icsp
  annotations: {}
spec:
#    repositoryDigestMirrors:
#    - $mirrors

Copy to Clipboard

Toggle word wrap

Recommended OperatorHub configuration (OperatorHub.yaml)

apiVersion: config.openshift.io/v1
kind: OperatorHub
metadata:
  name: cluster
  annotations: {}
spec:
  disableAllDefaultSources: true

apiVersion: config.openshift.io/v1
kind: OperatorHub
metadata:
  name: cluster
  annotations: {}
spec:
  disableAllDefaultSources: true

Copy to Clipboard

Toggle word wrap

7.7.2. Operator subscriptions
Copiar o link

Single-node OpenShift clusters that run DU workloads require the following Subscription CRs. The subscription provides the location to download the following Operators:

Local Storage Operator
Logging Operator
PTP Operator
SR-IOV Network Operator
SRIOV-FEC Operator

For each Operator subscription, specify the channel to get the Operator from. The recommended channel is stable.

You can specify Manual or Automatic updates. In Automatic mode, the Operator automatically updates to the latest versions in the channel as they become available in the registry. In Manual mode, new Operator versions are installed only when they are explicitly approved.

Tip

Use Manual mode for subscriptions. This allows you to control the timing of Operator updates to fit within scheduled maintenance windows.

Recommended Local Storage Operator subscription (StorageSubscription.yaml)

apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: local-storage-operator
  namespace: openshift-local-storage
  annotations: {}
spec:
  channel: "stable"
  name: local-storage-operator
  source: redhat-operators-disconnected
  sourceNamespace: openshift-marketplace
  installPlanApproval: Manual
status:
  state: AtLatestKnown

apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: local-storage-operator
  namespace: openshift-local-storage
  annotations: {}
spec:
  channel: "stable"
  name: local-storage-operator
  source: redhat-operators-disconnected
  sourceNamespace: openshift-marketplace
  installPlanApproval: Manual
status:
  state: AtLatestKnown

Copy to Clipboard

Toggle word wrap

Recommended SR-IOV Operator subscription (SriovSubscription.yaml)

apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: sriov-network-operator-subscription
  namespace: openshift-sriov-network-operator
  annotations: {}
spec:
  channel: "stable"
  name: sriov-network-operator
  source: redhat-operators-disconnected
  sourceNamespace: openshift-marketplace
  installPlanApproval: Manual
status:
  state: AtLatestKnown

apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: sriov-network-operator-subscription
  namespace: openshift-sriov-network-operator
  annotations: {}
spec:
  channel: "stable"
  name: sriov-network-operator
  source: redhat-operators-disconnected
  sourceNamespace: openshift-marketplace
  installPlanApproval: Manual
status:
  state: AtLatestKnown

Copy to Clipboard

Toggle word wrap

Recommended PTP Operator subscription (PtpSubscription.yaml)

---
apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: ptp-operator-subscription
  namespace: openshift-ptp
  annotations: {}
spec:
  channel: "stable"
  name: ptp-operator
  source: redhat-operators-disconnected
  sourceNamespace: openshift-marketplace
  installPlanApproval: Manual
status:
  state: AtLatestKnown

---
apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: ptp-operator-subscription
  namespace: openshift-ptp
  annotations: {}
spec:
  channel: "stable"
  name: ptp-operator
  source: redhat-operators-disconnected
  sourceNamespace: openshift-marketplace
  installPlanApproval: Manual
status:
  state: AtLatestKnown

Copy to Clipboard

Toggle word wrap

Recommended Cluster Logging Operator subscription (ClusterLogSubscription.yaml)

apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: cluster-logging
  namespace: openshift-logging
  annotations: {}
spec:
  channel: "stable-6.0"
  name: cluster-logging
  source: redhat-operators-disconnected
  sourceNamespace: openshift-marketplace
  installPlanApproval: Manual
status:
  state: AtLatestKnown

apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: cluster-logging
  namespace: openshift-logging
  annotations: {}
spec:
  channel: "stable-6.0"
  name: cluster-logging
  source: redhat-operators-disconnected
  sourceNamespace: openshift-marketplace
  installPlanApproval: Manual
status:
  state: AtLatestKnown

Copy to Clipboard

Toggle word wrap

7.7.3. Cluster logging and log forwarding
Copiar o link

Single-node OpenShift clusters that run DU workloads require logging and log forwarding for debugging. The following custom resources (CRs) are required.

Recommended ClusterLogForwarder.yaml

apiVersion: "observability.openshift.io/v1"
kind: ClusterLogForwarder
metadata:
  name: instance
  namespace: openshift-logging
  annotations: {}
spec:
  # outputs: $outputs
  # pipelines: $pipelines
  serviceAccount:
    name: logcollector
#apiVersion: "observability.openshift.io/v1"
#kind: ClusterLogForwarder
#metadata:
#  name: instance
#  namespace: openshift-logging
# spec:
#   outputs:
#   - type: "kafka"
#     name: kafka-open
#     # below url is an example
#     kafka:
#       url: tcp://10.46.55.190:9092/test
#   filters:
#   - name: test-labels
#     type: openshiftLabels
#     openshiftLabels:
#       label1: test1
#       label2: test2
#       label3: test3
#       label4: test4
#   pipelines:
#   - name: all-to-default
#     inputRefs:
#     - audit
#     - infrastructure
#     filterRefs:
#     - test-labels
#     outputRefs:
#     - kafka-open
#   serviceAccount:
#     name: logcollector

apiVersion: "observability.openshift.io/v1"
kind: ClusterLogForwarder
metadata:
  name: instance
  namespace: openshift-logging
  annotations: {}
spec:
  # outputs: $outputs
  # pipelines: $pipelines
  serviceAccount:
    name: logcollector
#apiVersion: "observability.openshift.io/v1"
#kind: ClusterLogForwarder
#metadata:
#  name: instance
#  namespace: openshift-logging
# spec:
#   outputs:
#   - type: "kafka"
#     name: kafka-open
#     # below url is an example
#     kafka:
#       url: tcp://10.46.55.190:9092/test
#   filters:
#   - name: test-labels
#     type: openshiftLabels
#     openshiftLabels:
#       label1: test1
#       label2: test2
#       label3: test3
#       label4: test4
#   pipelines:
#   - name: all-to-default
#     inputRefs:
#     - audit
#     - infrastructure
#     filterRefs:
#     - test-labels
#     outputRefs:
#     - kafka-open
#   serviceAccount:
#     name: logcollector

Copy to Clipboard

Toggle word wrap

Note

Set the spec.outputs.kafka.url field to the URL of the Kafka server where the logs are forwarded to.

Recommended ClusterLogNS.yaml

---
apiVersion: v1
kind: Namespace
metadata:
  name: openshift-logging
  annotations:
    workload.openshift.io/allowed: management

---
apiVersion: v1
kind: Namespace
metadata:
  name: openshift-logging
  annotations:
    workload.openshift.io/allowed: management

Copy to Clipboard

Toggle word wrap

Recommended ClusterLogOperGroup.yaml

---
apiVersion: operators.coreos.com/v1
kind: OperatorGroup
metadata:
  name: cluster-logging
  namespace: openshift-logging
  annotations: {}
spec:
  targetNamespaces:
    - openshift-logging

---
apiVersion: operators.coreos.com/v1
kind: OperatorGroup
metadata:
  name: cluster-logging
  namespace: openshift-logging
  annotations: {}
spec:
  targetNamespaces:
    - openshift-logging

Copy to Clipboard

Toggle word wrap

Recommended ClusterLogServiceAccount.yaml

---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: logcollector
  namespace: openshift-logging
  annotations: {}

---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: logcollector
  namespace: openshift-logging
  annotations: {}

Copy to Clipboard

Toggle word wrap

Recommended ClusterLogServiceAccountAuditBinding.yaml

---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: logcollector-audit-logs-binding
  annotations: {}
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: collect-audit-logs
subjects:
  - kind: ServiceAccount
    name: logcollector
    namespace: openshift-logging

---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: logcollector-audit-logs-binding
  annotations: {}
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: collect-audit-logs
subjects:
  - kind: ServiceAccount
    name: logcollector
    namespace: openshift-logging

Copy to Clipboard

Toggle word wrap

Recommended ClusterLogServiceAccountInfrastructureBinding.yaml

---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: logcollector-infrastructure-logs-binding
  annotations: {}
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: collect-infrastructure-logs
subjects:
  - kind: ServiceAccount
    name: logcollector
    namespace: openshift-logging

---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: logcollector-infrastructure-logs-binding
  annotations: {}
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: collect-infrastructure-logs
subjects:
  - kind: ServiceAccount
    name: logcollector
    namespace: openshift-logging

Copy to Clipboard

Toggle word wrap

Recommended ClusterLogSubscription.yaml

apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: cluster-logging
  namespace: openshift-logging
  annotations: {}
spec:
  channel: "stable-6.0"
  name: cluster-logging
  source: redhat-operators-disconnected
  sourceNamespace: openshift-marketplace
  installPlanApproval: Manual
status:
  state: AtLatestKnown

apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: cluster-logging
  namespace: openshift-logging
  annotations: {}
spec:
  channel: "stable-6.0"
  name: cluster-logging
  source: redhat-operators-disconnected
  sourceNamespace: openshift-marketplace
  installPlanApproval: Manual
status:
  state: AtLatestKnown

Copy to Clipboard

Toggle word wrap

7.7.4. Performance profile
Copiar o link

Single-node OpenShift clusters that run DU workloads require a Node Tuning Operator performance profile to use real-time host capabilities and services.

Note

In earlier versions of OpenShift Container Platform, the Performance Addon Operator was used to implement automatic tuning to achieve low latency performance for OpenShift applications. In OpenShift Container Platform 4.11 and later, this functionality is part of the Node Tuning Operator.

The following example PerformanceProfile CR illustrates the required single-node OpenShift cluster configuration.

Recommended performance profile configuration (PerformanceProfile.yaml)

apiVersion: performance.openshift.io/v2
kind: PerformanceProfile
metadata:
  # if you change this name make sure the 'include' line in TunedPerformancePatch.yaml
  # matches this name: include=openshift-node-performance-${PerformanceProfile.metadata.name}
  # Also in file 'validatorCRs/informDuValidator.yaml':
  # name: 50-performance-${PerformanceProfile.metadata.name}
  name: openshift-node-performance-profile
  annotations:
    ran.openshift.io/reference-configuration: "ran-du.redhat.com"
spec:
  additionalKernelArgs:
    - "rcupdate.rcu_normal_after_boot=0"
    - "efi=runtime"
    - "vfio_pci.enable_sriov=1"
    - "vfio_pci.disable_idle_d3=1"
    - "module_blacklist=irdma"
  cpu:
    isolated: $isolated
    reserved: $reserved
  hugepages:
    defaultHugepagesSize: $defaultHugepagesSize
    pages:
      - size: $size
        count: $count
        node: $node
  machineConfigPoolSelector:
    pools.operator.machineconfiguration.openshift.io/$mcp: ""
  nodeSelector:
    node-role.kubernetes.io/$mcp: ''
  numa:
    topologyPolicy: "restricted"
  # To use the standard (non-realtime) kernel, set enabled to false
  realTimeKernel:
    enabled: true
  workloadHints:
    # WorkloadHints defines the set of upper level flags for different type of workloads.
    # See https://github.com/openshift/cluster-node-tuning-operator/blob/master/docs/performanceprofile/performance_profile.md#workloadhints
    # for detailed descriptions of each item.
    # The configuration below is set for a low latency, performance mode.
    realTime: true
    highPowerConsumption: false
    perPodPowerManagement: false

apiVersion: performance.openshift.io/v2
kind: PerformanceProfile
metadata:
  # if you change this name make sure the 'include' line in TunedPerformancePatch.yaml
  # matches this name: include=openshift-node-performance-${PerformanceProfile.metadata.name}
  # Also in file 'validatorCRs/informDuValidator.yaml':
  # name: 50-performance-${PerformanceProfile.metadata.name}
  name: openshift-node-performance-profile
  annotations:
    ran.openshift.io/reference-configuration: "ran-du.redhat.com"
spec:
  additionalKernelArgs:
    - "rcupdate.rcu_normal_after_boot=0"
    - "efi=runtime"
    - "vfio_pci.enable_sriov=1"
    - "vfio_pci.disable_idle_d3=1"
    - "module_blacklist=irdma"
  cpu:
    isolated: $isolated
    reserved: $reserved
  hugepages:
    defaultHugepagesSize: $defaultHugepagesSize
    pages:
      - size: $size
        count: $count
        node: $node
  machineConfigPoolSelector:
    pools.operator.machineconfiguration.openshift.io/$mcp: ""
  nodeSelector:
    node-role.kubernetes.io/$mcp: ''
  numa:
    topologyPolicy: "restricted"
  # To use the standard (non-realtime) kernel, set enabled to false
  realTimeKernel:
    enabled: true
  workloadHints:
    # WorkloadHints defines the set of upper level flags for different type of workloads.
    # See https://github.com/openshift/cluster-node-tuning-operator/blob/master/docs/performanceprofile/performance_profile.md#workloadhints
    # for detailed descriptions of each item.
    # The configuration below is set for a low latency, performance mode.
    realTime: true
    highPowerConsumption: false
    perPodPowerManagement: false

Copy to Clipboard

Toggle word wrap

Expand

Table 7.3. PerformanceProfile CR options for single-node OpenShift clusters
PerformanceProfile CR field	Description
`metadata.name`	Ensure that `name` matches the following fields set in related GitOps ZTP custom resources (CRs): `include=openshift-node-performance-${PerformanceProfile.metadata.name}` in `TunedPerformancePatch.yaml` `name: 50-performance-${PerformanceProfile.metadata.name}` in `validatorCRs/informDuValidator.yaml`
`spec.additionalKernelArgs`	`"efi=runtime"` Configures UEFI secure boot for the cluster host.
`spec.cpu.isolated`	Set the isolated CPUs. Ensure all of the Hyper-Threading pairs match. Important The reserved and isolated CPU pools must not overlap and together must span all available cores. CPU cores that are not accounted for cause an undefined behaviour in the system.
`spec.cpu.reserved`	Set the reserved CPUs. When workload partitioning is enabled, system processes, kernel threads, and system container threads are restricted to these CPUs. All CPUs that are not isolated should be reserved.
`spec.hugepages.pages`	Set the number of huge pages (`count`) Set the huge pages size (`size`). Set `node` to the NUMA node where the `hugepages` are allocated (`node`)
`spec.realTimeKernel`	Set `enabled` to `true` to use the realtime kernel.
`spec.workloadHints`	Use `workloadHints` to define the set of top level flags for different type of workloads. The example configuration configures the cluster for low latency and high performance.

7.7.5. Configuring cluster time synchronization
Copiar o link

Run a one-time system time synchronization job for control plane or worker nodes.

Recommended one time time-sync for control plane nodes (99-sync-time-once-master.yaml)

# Automatically generated by extra-manifests-builder
# Do not make changes directly.
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: master
  name: 99-sync-time-once-master
spec:
  config:
    ignition:
      version: 3.2.0
    systemd:
      units:
        - contents: |
            [Unit]
            Description=Sync time once
            After=network-online.target
            Wants=network-online.target
            [Service]
            Type=oneshot
            TimeoutStartSec=300
            ExecCondition=/bin/bash -c 'systemctl is-enabled chronyd.service --quiet && exit 1 || exit 0'
            ExecStart=/usr/sbin/chronyd -n -f /etc/chrony.conf -q
            RemainAfterExit=yes
            [Install]
            WantedBy=multi-user.target
          enabled: true
          name: sync-time-once.service

# Automatically generated by extra-manifests-builder
# Do not make changes directly.
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: master
  name: 99-sync-time-once-master
spec:
  config:
    ignition:
      version: 3.2.0
    systemd:
      units:
        - contents: |
            [Unit]
            Description=Sync time once
            After=network-online.target
            Wants=network-online.target
            [Service]
            Type=oneshot
            TimeoutStartSec=300
            ExecCondition=/bin/bash -c 'systemctl is-enabled chronyd.service --quiet && exit 1 || exit 0'
            ExecStart=/usr/sbin/chronyd -n -f /etc/chrony.conf -q
            RemainAfterExit=yes
            [Install]
            WantedBy=multi-user.target
          enabled: true
          name: sync-time-once.service

Copy to Clipboard

Toggle word wrap

Recommended one time time-sync for worker nodes (99-sync-time-once-worker.yaml)

# Automatically generated by extra-manifests-builder
# Do not make changes directly.
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: worker
  name: 99-sync-time-once-worker
spec:
  config:
    ignition:
      version: 3.2.0
    systemd:
      units:
        - contents: |
            [Unit]
            Description=Sync time once
            After=network-online.target
            Wants=network-online.target
            [Service]
            Type=oneshot
            TimeoutStartSec=300
            ExecCondition=/bin/bash -c 'systemctl is-enabled chronyd.service --quiet && exit 1 || exit 0'
            ExecStart=/usr/sbin/chronyd -n -f /etc/chrony.conf -q
            RemainAfterExit=yes
            [Install]
            WantedBy=multi-user.target
          enabled: true
          name: sync-time-once.service

# Automatically generated by extra-manifests-builder
# Do not make changes directly.
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: worker
  name: 99-sync-time-once-worker
spec:
  config:
    ignition:
      version: 3.2.0
    systemd:
      units:
        - contents: |
            [Unit]
            Description=Sync time once
            After=network-online.target
            Wants=network-online.target
            [Service]
            Type=oneshot
            TimeoutStartSec=300
            ExecCondition=/bin/bash -c 'systemctl is-enabled chronyd.service --quiet && exit 1 || exit 0'
            ExecStart=/usr/sbin/chronyd -n -f /etc/chrony.conf -q
            RemainAfterExit=yes
            [Install]
            WantedBy=multi-user.target
          enabled: true
          name: sync-time-once.service

Copy to Clipboard

Toggle word wrap

7.7.6. PTP
Copiar o link

Single-node OpenShift clusters use Precision Time Protocol (PTP) for network time synchronization. The following example PtpConfig CRs illustrate the required PTP configurations for ordinary clocks, boundary clocks, and grandmaster clocks. The exact configuration you apply will depend on the node hardware and specific use case.

Recommended PTP ordinary clock configuration (PtpConfigSlave.yaml)

apiVersion: ptp.openshift.io/v1
kind: PtpConfig
metadata:
  name: ordinary
  namespace: openshift-ptp
  annotations: {}
spec:
  profile:
    - name: "ordinary"
      # The interface name is hardware-specific
      interface: $interface
      ptp4lOpts: "-2 -s"
      phc2sysOpts: "-a -r -n 24"
      ptpSchedulingPolicy: SCHED_FIFO
      ptpSchedulingPriority: 10
      ptpSettings:
        logReduce: "true"
      ptp4lConf: |
        [global]
        #
        # Default Data Set
        #
        twoStepFlag 1
        slaveOnly 1
        priority1 128
        priority2 128
        domainNumber 24
        #utc_offset 37
        clockClass 255
        clockAccuracy 0xFE
        offsetScaledLogVariance 0xFFFF
        free_running 0
        freq_est_interval 1
        dscp_event 0
        dscp_general 0
        dataset_comparison G.8275.x
        G.8275.defaultDS.localPriority 128
        #
        # Port Data Set
        #
        logAnnounceInterval -3
        logSyncInterval -4
        logMinDelayReqInterval -4
        logMinPdelayReqInterval -4
        announceReceiptTimeout 3
        syncReceiptTimeout 0
        delayAsymmetry 0
        fault_reset_interval -4
        neighborPropDelayThresh 20000000
        masterOnly 0
        G.8275.portDS.localPriority 128
        #
        # Run time options
        #
        assume_two_step 0
        logging_level 6
        path_trace_enabled 0
        follow_up_info 0
        hybrid_e2e 0
        inhibit_multicast_service 0
        net_sync_monitor 0
        tc_spanning_tree 0
        tx_timestamp_timeout 50
        unicast_listen 0
        unicast_master_table 0
        unicast_req_duration 3600
        use_syslog 1
        verbose 0
        summary_interval 0
        kernel_leap 1
        check_fup_sync 0
        clock_class_threshold 7
        #
        # Servo Options
        #
        pi_proportional_const 0.0
        pi_integral_const 0.0
        pi_proportional_scale 0.0
        pi_proportional_exponent -0.3
        pi_proportional_norm_max 0.7
        pi_integral_scale 0.0
        pi_integral_exponent 0.4
        pi_integral_norm_max 0.3
        step_threshold 2.0
        first_step_threshold 0.00002
        max_frequency 900000000
        clock_servo pi
        sanity_freq_limit 200000000
        ntpshm_segment 0
        #
        # Transport options
        #
        transportSpecific 0x0
        ptp_dst_mac 01:1B:19:00:00:00
        p2p_dst_mac 01:80:C2:00:00:0E
        udp_ttl 1
        udp6_scope 0x0E
        uds_address /var/run/ptp4l
        #
        # Default interface options
        #
        clock_type OC
        network_transport L2
        delay_mechanism E2E
        time_stamping hardware
        tsproc_mode filter
        delay_filter moving_median
        delay_filter_length 10
        egressLatency 0
        ingressLatency 0
        boundary_clock_jbod 0
        #
        # Clock description
        #
        productDescription ;;
        revisionData ;;
        manufacturerIdentity 00:00:00
        userDescription ;
        timeSource 0xA0
  recommend:
    - profile: "ordinary"
      priority: 4
      match:
        - nodeLabel: "node-role.kubernetes.io/$mcp"

apiVersion: ptp.openshift.io/v1
kind: PtpConfig
metadata:
  name: ordinary
  namespace: openshift-ptp
  annotations: {}
spec:
  profile:
    - name: "ordinary"
      # The interface name is hardware-specific
      interface: $interface
      ptp4lOpts: "-2 -s"
      phc2sysOpts: "-a -r -n 24"
      ptpSchedulingPolicy: SCHED_FIFO
      ptpSchedulingPriority: 10
      ptpSettings:
        logReduce: "true"
      ptp4lConf: |
        [global]
        #
        # Default Data Set
        #
        twoStepFlag 1
        slaveOnly 1
        priority1 128
        priority2 128
        domainNumber 24
        #utc_offset 37
        clockClass 255
        clockAccuracy 0xFE
        offsetScaledLogVariance 0xFFFF
        free_running 0
        freq_est_interval 1
        dscp_event 0
        dscp_general 0
        dataset_comparison G.8275.x
        G.8275.defaultDS.localPriority 128
        #
        # Port Data Set
        #
        logAnnounceInterval -3
        logSyncInterval -4
        logMinDelayReqInterval -4
        logMinPdelayReqInterval -4
        announceReceiptTimeout 3
        syncReceiptTimeout 0
        delayAsymmetry 0
        fault_reset_interval -4
        neighborPropDelayThresh 20000000
        masterOnly 0
        G.8275.portDS.localPriority 128
        #
        # Run time options
        #
        assume_two_step 0
        logging_level 6
        path_trace_enabled 0
        follow_up_info 0
        hybrid_e2e 0
        inhibit_multicast_service 0
        net_sync_monitor 0
        tc_spanning_tree 0
        tx_timestamp_timeout 50
        unicast_listen 0
        unicast_master_table 0
        unicast_req_duration 3600
        use_syslog 1
        verbose 0
        summary_interval 0
        kernel_leap 1
        check_fup_sync 0
        clock_class_threshold 7
        #
        # Servo Options
        #
        pi_proportional_const 0.0
        pi_integral_const 0.0
        pi_proportional_scale 0.0
        pi_proportional_exponent -0.3
        pi_proportional_norm_max 0.7
        pi_integral_scale 0.0
        pi_integral_exponent 0.4
        pi_integral_norm_max 0.3
        step_threshold 2.0
        first_step_threshold 0.00002
        max_frequency 900000000
        clock_servo pi
        sanity_freq_limit 200000000
        ntpshm_segment 0
        #
        # Transport options
        #
        transportSpecific 0x0
        ptp_dst_mac 01:1B:19:00:00:00
        p2p_dst_mac 01:80:C2:00:00:0E
        udp_ttl 1
        udp6_scope 0x0E
        uds_address /var/run/ptp4l
        #
        # Default interface options
        #
        clock_type OC
        network_transport L2
        delay_mechanism E2E
        time_stamping hardware
        tsproc_mode filter
        delay_filter moving_median
        delay_filter_length 10
        egressLatency 0
        ingressLatency 0
        boundary_clock_jbod 0
        #
        # Clock description
        #
        productDescription ;;
        revisionData ;;
        manufacturerIdentity 00:00:00
        userDescription ;
        timeSource 0xA0
  recommend:
    - profile: "ordinary"
      priority: 4
      match:
        - nodeLabel: "node-role.kubernetes.io/$mcp"

Copy to Clipboard

Toggle word wrap

Recommended boundary clock configuration (PtpConfigBoundary.yaml)

apiVersion: ptp.openshift.io/v1
kind: PtpConfig
metadata:
  name: boundary
  namespace: openshift-ptp
  annotations: {}
spec:
  profile:
    - name: "boundary"
      ptp4lOpts: "-2"
      phc2sysOpts: "-a -r -n 24"
      ptpSchedulingPolicy: SCHED_FIFO
      ptpSchedulingPriority: 10
      ptpSettings:
        logReduce: "true"
      ptp4lConf: |
        # The interface name is hardware-specific
        [$iface_slave]
        masterOnly 0
        [$iface_master_1]
        masterOnly 1
        [$iface_master_2]
        masterOnly 1
        [$iface_master_3]
        masterOnly 1
        [global]
        #
        # Default Data Set
        #
        twoStepFlag 1
        slaveOnly 0
        priority1 128
        priority2 128
        domainNumber 24
        #utc_offset 37
        clockClass 248
        clockAccuracy 0xFE
        offsetScaledLogVariance 0xFFFF
        free_running 0
        freq_est_interval 1
        dscp_event 0
        dscp_general 0
        dataset_comparison G.8275.x
        G.8275.defaultDS.localPriority 128
        #
        # Port Data Set
        #
        logAnnounceInterval -3
        logSyncInterval -4
        logMinDelayReqInterval -4
        logMinPdelayReqInterval -4
        announceReceiptTimeout 3
        syncReceiptTimeout 0
        delayAsymmetry 0
        fault_reset_interval -4
        neighborPropDelayThresh 20000000
        masterOnly 0
        G.8275.portDS.localPriority 128
        #
        # Run time options
        #
        assume_two_step 0
        logging_level 6
        path_trace_enabled 0
        follow_up_info 0
        hybrid_e2e 0
        inhibit_multicast_service 0
        net_sync_monitor 0
        tc_spanning_tree 0
        tx_timestamp_timeout 50
        unicast_listen 0
        unicast_master_table 0
        unicast_req_duration 3600
        use_syslog 1
        verbose 0
        summary_interval 0
        kernel_leap 1
        check_fup_sync 0
        clock_class_threshold 135
        #
        # Servo Options
        #
        pi_proportional_const 0.0
        pi_integral_const 0.0
        pi_proportional_scale 0.0
        pi_proportional_exponent -0.3
        pi_proportional_norm_max 0.7
        pi_integral_scale 0.0
        pi_integral_exponent 0.4
        pi_integral_norm_max 0.3
        step_threshold 2.0
        first_step_threshold 0.00002
        max_frequency 900000000
        clock_servo pi
        sanity_freq_limit 200000000
        ntpshm_segment 0
        #
        # Transport options
        #
        transportSpecific 0x0
        ptp_dst_mac 01:1B:19:00:00:00
        p2p_dst_mac 01:80:C2:00:00:0E
        udp_ttl 1
        udp6_scope 0x0E
        uds_address /var/run/ptp4l
        #
        # Default interface options
        #
        clock_type BC
        network_transport L2
        delay_mechanism E2E
        time_stamping hardware
        tsproc_mode filter
        delay_filter moving_median
        delay_filter_length 10
        egressLatency 0
        ingressLatency 0
        boundary_clock_jbod 0
        #
        # Clock description
        #
        productDescription ;;
        revisionData ;;
        manufacturerIdentity 00:00:00
        userDescription ;
        timeSource 0xA0
  recommend:
    - profile: "boundary"
      priority: 4
      match:
        - nodeLabel: "node-role.kubernetes.io/$mcp"

apiVersion: ptp.openshift.io/v1
kind: PtpConfig
metadata:
  name: boundary
  namespace: openshift-ptp
  annotations: {}
spec:
  profile:
    - name: "boundary"
      ptp4lOpts: "-2"
      phc2sysOpts: "-a -r -n 24"
      ptpSchedulingPolicy: SCHED_FIFO
      ptpSchedulingPriority: 10
      ptpSettings:
        logReduce: "true"
      ptp4lConf: |
        # The interface name is hardware-specific
        [$iface_slave]
        masterOnly 0
        [$iface_master_1]
        masterOnly 1
        [$iface_master_2]
        masterOnly 1
        [$iface_master_3]
        masterOnly 1
        [global]
        #
        # Default Data Set
        #
        twoStepFlag 1
        slaveOnly 0
        priority1 128
        priority2 128
        domainNumber 24
        #utc_offset 37
        clockClass 248
        clockAccuracy 0xFE
        offsetScaledLogVariance 0xFFFF
        free_running 0
        freq_est_interval 1
        dscp_event 0
        dscp_general 0
        dataset_comparison G.8275.x
        G.8275.defaultDS.localPriority 128
        #
        # Port Data Set
        #
        logAnnounceInterval -3
        logSyncInterval -4
        logMinDelayReqInterval -4
        logMinPdelayReqInterval -4
        announceReceiptTimeout 3
        syncReceiptTimeout 0
        delayAsymmetry 0
        fault_reset_interval -4
        neighborPropDelayThresh 20000000
        masterOnly 0
        G.8275.portDS.localPriority 128
        #
        # Run time options
        #
        assume_two_step 0
        logging_level 6
        path_trace_enabled 0
        follow_up_info 0
        hybrid_e2e 0
        inhibit_multicast_service 0
        net_sync_monitor 0
        tc_spanning_tree 0
        tx_timestamp_timeout 50
        unicast_listen 0
        unicast_master_table 0
        unicast_req_duration 3600
        use_syslog 1
        verbose 0
        summary_interval 0
        kernel_leap 1
        check_fup_sync 0
        clock_class_threshold 135
        #
        # Servo Options
        #
        pi_proportional_const 0.0
        pi_integral_const 0.0
        pi_proportional_scale 0.0
        pi_proportional_exponent -0.3
        pi_proportional_norm_max 0.7
        pi_integral_scale 0.0
        pi_integral_exponent 0.4
        pi_integral_norm_max 0.3
        step_threshold 2.0
        first_step_threshold 0.00002
        max_frequency 900000000
        clock_servo pi
        sanity_freq_limit 200000000
        ntpshm_segment 0
        #
        # Transport options
        #
        transportSpecific 0x0
        ptp_dst_mac 01:1B:19:00:00:00
        p2p_dst_mac 01:80:C2:00:00:0E
        udp_ttl 1
        udp6_scope 0x0E
        uds_address /var/run/ptp4l
        #
        # Default interface options
        #
        clock_type BC
        network_transport L2
        delay_mechanism E2E
        time_stamping hardware
        tsproc_mode filter
        delay_filter moving_median
        delay_filter_length 10
        egressLatency 0
        ingressLatency 0
        boundary_clock_jbod 0
        #
        # Clock description
        #
        productDescription ;;
        revisionData ;;
        manufacturerIdentity 00:00:00
        userDescription ;
        timeSource 0xA0
  recommend:
    - profile: "boundary"
      priority: 4
      match:
        - nodeLabel: "node-role.kubernetes.io/$mcp"

Copy to Clipboard

Toggle word wrap

Recommended PTP Westport Channel e810 grandmaster clock configuration (PtpConfigGmWpc.yaml)

# The grandmaster profile is provided for testing only
# It is not installed on production clusters
apiVersion: ptp.openshift.io/v1
kind: PtpConfig
metadata:
  name: grandmaster
  namespace: openshift-ptp
  annotations: {}
spec:
  profile:
    - name: "grandmaster"
      ptp4lOpts: "-2 --summary_interval -4"
      phc2sysOpts: -r -u 0 -m -w -N 8 -R 16 -s $iface_master -n 24
      ptpSchedulingPolicy: SCHED_FIFO
      ptpSchedulingPriority: 10
      ptpSettings:
        logReduce: "true"
      plugins:
        e810:
          enableDefaultConfig: false
          settings:
            LocalMaxHoldoverOffSet: 1500
            LocalHoldoverTimeout: 14400
            MaxInSpecOffset: 1500
          pins: $e810_pins
          #  "$iface_master":
          #    "U.FL2": "0 2"
          #    "U.FL1": "0 1"
          #    "SMA2": "0 2"
          #    "SMA1": "0 1"
          ublxCmds:
            - args: #ubxtool -P 29.20 -z CFG-HW-ANT_CFG_VOLTCTRL,1
                - "-P"
                - "29.20"
                - "-z"
                - "CFG-HW-ANT_CFG_VOLTCTRL,1"
              reportOutput: false
            - args: #ubxtool -P 29.20 -e GPS
                - "-P"
                - "29.20"
                - "-e"
                - "GPS"
              reportOutput: false
            - args: #ubxtool -P 29.20 -d Galileo
                - "-P"
                - "29.20"
                - "-d"
                - "Galileo"
              reportOutput: false
            - args: #ubxtool -P 29.20 -d GLONASS
                - "-P"
                - "29.20"
                - "-d"
                - "GLONASS"
              reportOutput: false
            - args: #ubxtool -P 29.20 -d BeiDou
                - "-P"
                - "29.20"
                - "-d"
                - "BeiDou"
              reportOutput: false
            - args: #ubxtool -P 29.20 -d SBAS
                - "-P"
                - "29.20"
                - "-d"
                - "SBAS"
              reportOutput: false
            - args: #ubxtool -P 29.20 -t -w 5 -v 1 -e SURVEYIN,600,50000
                - "-P"
                - "29.20"
                - "-t"
                - "-w"
                - "5"
                - "-v"
                - "1"
                - "-e"
                - "SURVEYIN,600,50000"
              reportOutput: true
            - args: #ubxtool -P 29.20 -p MON-HW
                - "-P"
                - "29.20"
                - "-p"
                - "MON-HW"
              reportOutput: true
            - args: #ubxtool -P 29.20 -p CFG-MSG,1,38,248
                - "-P"
                - "29.20"
                - "-p"
                - "CFG-MSG,1,38,248"
              reportOutput: true
      ts2phcOpts: " "
      ts2phcConf: |
        [nmea]
        ts2phc.master 1
        [global]
        use_syslog  0
        verbose 1
        logging_level 7
        ts2phc.pulsewidth 100000000
        #cat /dev/GNSS to find available serial port
        #example value of gnss_serialport is /dev/ttyGNSS_1700_0
        ts2phc.nmea_serialport $gnss_serialport
        leapfile  /usr/share/zoneinfo/leap-seconds.list
        [$iface_master]
        ts2phc.extts_polarity rising
        ts2phc.extts_correction 0
      ptp4lConf: |
        [$iface_master]
        masterOnly 1
        [$iface_master_1]
        masterOnly 1
        [$iface_master_2]
        masterOnly 1
        [$iface_master_3]
        masterOnly 1
        [global]
        #
        # Default Data Set
        #
        twoStepFlag 1
        priority1 128
        priority2 128
        domainNumber 24
        #utc_offset 37
        clockClass 6
        clockAccuracy 0x27
        offsetScaledLogVariance 0xFFFF
        free_running 0
        freq_est_interval 1
        dscp_event 0
        dscp_general 0
        dataset_comparison G.8275.x
        G.8275.defaultDS.localPriority 128
        #
        # Port Data Set
        #
        logAnnounceInterval -3
        logSyncInterval -4
        logMinDelayReqInterval -4
        logMinPdelayReqInterval 0
        announceReceiptTimeout 3
        syncReceiptTimeout 0
        delayAsymmetry 0
        fault_reset_interval -4
        neighborPropDelayThresh 20000000
        masterOnly 0
        G.8275.portDS.localPriority 128
        #
        # Run time options
        #
        assume_two_step 0
        logging_level 6
        path_trace_enabled 0
        follow_up_info 0
        hybrid_e2e 0
        inhibit_multicast_service 0
        net_sync_monitor 0
        tc_spanning_tree 0
        tx_timestamp_timeout 50
        unicast_listen 0
        unicast_master_table 0
        unicast_req_duration 3600
        use_syslog 1
        verbose 0
        summary_interval -4
        kernel_leap 1
        check_fup_sync 0
        clock_class_threshold 7
        #
        # Servo Options
        #
        pi_proportional_const 0.0
        pi_integral_const 0.0
        pi_proportional_scale 0.0
        pi_proportional_exponent -0.3
        pi_proportional_norm_max 0.7
        pi_integral_scale 0.0
        pi_integral_exponent 0.4
        pi_integral_norm_max 0.3
        step_threshold 2.0
        first_step_threshold 0.00002
        clock_servo pi
        sanity_freq_limit  200000000
        ntpshm_segment 0
        #
        # Transport options
        #
        transportSpecific 0x0
        ptp_dst_mac 01:1B:19:00:00:00
        p2p_dst_mac 01:80:C2:00:00:0E
        udp_ttl 1
        udp6_scope 0x0E
        uds_address /var/run/ptp4l
        #
        # Default interface options
        #
        clock_type BC
        network_transport L2
        delay_mechanism E2E
        time_stamping hardware
        tsproc_mode filter
        delay_filter moving_median
        delay_filter_length 10
        egressLatency 0
        ingressLatency 0
        boundary_clock_jbod 0
        #
        # Clock description
        #
        productDescription ;;
        revisionData ;;
        manufacturerIdentity 00:00:00
        userDescription ;
        timeSource 0x20
  recommend:
    - profile: "grandmaster"
      priority: 4
      match:
        - nodeLabel: "node-role.kubernetes.io/$mcp"

# The grandmaster profile is provided for testing only
# It is not installed on production clusters
apiVersion: ptp.openshift.io/v1
kind: PtpConfig
metadata:
  name: grandmaster
  namespace: openshift-ptp
  annotations: {}
spec:
  profile:
    - name: "grandmaster"
      ptp4lOpts: "-2 --summary_interval -4"
      phc2sysOpts: -r -u 0 -m -w -N 8 -R 16 -s $iface_master -n 24
      ptpSchedulingPolicy: SCHED_FIFO
      ptpSchedulingPriority: 10
      ptpSettings:
        logReduce: "true"
      plugins:
        e810:
          enableDefaultConfig: false
          settings:
            LocalMaxHoldoverOffSet: 1500
            LocalHoldoverTimeout: 14400
            MaxInSpecOffset: 1500
          pins: $e810_pins
          #  "$iface_master":
          #    "U.FL2": "0 2"
          #    "U.FL1": "0 1"
          #    "SMA2": "0 2"
          #    "SMA1": "0 1"
          ublxCmds:
            - args: #ubxtool -P 29.20 -z CFG-HW-ANT_CFG_VOLTCTRL,1
                - "-P"
                - "29.20"
                - "-z"
                - "CFG-HW-ANT_CFG_VOLTCTRL,1"
              reportOutput: false
            - args: #ubxtool -P 29.20 -e GPS
                - "-P"
                - "29.20"
                - "-e"
                - "GPS"
              reportOutput: false
            - args: #ubxtool -P 29.20 -d Galileo
                - "-P"
                - "29.20"
                - "-d"
                - "Galileo"
              reportOutput: false
            - args: #ubxtool -P 29.20 -d GLONASS
                - "-P"
                - "29.20"
                - "-d"
                - "GLONASS"
              reportOutput: false
            - args: #ubxtool -P 29.20 -d BeiDou
                - "-P"
                - "29.20"
                - "-d"
                - "BeiDou"
              reportOutput: false
            - args: #ubxtool -P 29.20 -d SBAS
                - "-P"
                - "29.20"
                - "-d"
                - "SBAS"
              reportOutput: false
            - args: #ubxtool -P 29.20 -t -w 5 -v 1 -e SURVEYIN,600,50000
                - "-P"
                - "29.20"
                - "-t"
                - "-w"
                - "5"
                - "-v"
                - "1"
                - "-e"
                - "SURVEYIN,600,50000"
              reportOutput: true
            - args: #ubxtool -P 29.20 -p MON-HW
                - "-P"
                - "29.20"
                - "-p"
                - "MON-HW"
              reportOutput: true
            - args: #ubxtool -P 29.20 -p CFG-MSG,1,38,248
                - "-P"
                - "29.20"
                - "-p"
                - "CFG-MSG,1,38,248"
              reportOutput: true
      ts2phcOpts: " "
      ts2phcConf: |
        [nmea]
        ts2phc.master 1
        [global]
        use_syslog  0
        verbose 1
        logging_level 7
        ts2phc.pulsewidth 100000000
        #cat /dev/GNSS to find available serial port
        #example value of gnss_serialport is /dev/ttyGNSS_1700_0
        ts2phc.nmea_serialport $gnss_serialport
        leapfile  /usr/share/zoneinfo/leap-seconds.list
        [$iface_master]
        ts2phc.extts_polarity rising
        ts2phc.extts_correction 0
      ptp4lConf: |
        [$iface_master]
        masterOnly 1
        [$iface_master_1]
        masterOnly 1
        [$iface_master_2]
        masterOnly 1
        [$iface_master_3]
        masterOnly 1
        [global]
        #
        # Default Data Set
        #
        twoStepFlag 1
        priority1 128
        priority2 128
        domainNumber 24
        #utc_offset 37
        clockClass 6
        clockAccuracy 0x27
        offsetScaledLogVariance 0xFFFF
        free_running 0
        freq_est_interval 1
        dscp_event 0
        dscp_general 0
        dataset_comparison G.8275.x
        G.8275.defaultDS.localPriority 128
        #
        # Port Data Set
        #
        logAnnounceInterval -3
        logSyncInterval -4
        logMinDelayReqInterval -4
        logMinPdelayReqInterval 0
        announceReceiptTimeout 3
        syncReceiptTimeout 0
        delayAsymmetry 0
        fault_reset_interval -4
        neighborPropDelayThresh 20000000
        masterOnly 0
        G.8275.portDS.localPriority 128
        #
        # Run time options
        #
        assume_two_step 0
        logging_level 6
        path_trace_enabled 0
        follow_up_info 0
        hybrid_e2e 0
        inhibit_multicast_service 0
        net_sync_monitor 0
        tc_spanning_tree 0
        tx_timestamp_timeout 50
        unicast_listen 0
        unicast_master_table 0
        unicast_req_duration 3600
        use_syslog 1
        verbose 0
        summary_interval -4
        kernel_leap 1
        check_fup_sync 0
        clock_class_threshold 7
        #
        # Servo Options
        #
        pi_proportional_const 0.0
        pi_integral_const 0.0
        pi_proportional_scale 0.0
        pi_proportional_exponent -0.3
        pi_proportional_norm_max 0.7
        pi_integral_scale 0.0
        pi_integral_exponent 0.4
        pi_integral_norm_max 0.3
        step_threshold 2.0
        first_step_threshold 0.00002
        clock_servo pi
        sanity_freq_limit  200000000
        ntpshm_segment 0
        #
        # Transport options
        #
        transportSpecific 0x0
        ptp_dst_mac 01:1B:19:00:00:00
        p2p_dst_mac 01:80:C2:00:00:0E
        udp_ttl 1
        udp6_scope 0x0E
        uds_address /var/run/ptp4l
        #
        # Default interface options
        #
        clock_type BC
        network_transport L2
        delay_mechanism E2E
        time_stamping hardware
        tsproc_mode filter
        delay_filter moving_median
        delay_filter_length 10
        egressLatency 0
        ingressLatency 0
        boundary_clock_jbod 0
        #
        # Clock description
        #
        productDescription ;;
        revisionData ;;
        manufacturerIdentity 00:00:00
        userDescription ;
        timeSource 0x20
  recommend:
    - profile: "grandmaster"
      priority: 4
      match:
        - nodeLabel: "node-role.kubernetes.io/$mcp"

Copy to Clipboard

Toggle word wrap

The following optional PtpOperatorConfig CR configures PTP events reporting for the node.

Recommended PTP events configuration (PtpOperatorConfigForEvent.yaml)

apiVersion: ptp.openshift.io/v1
kind: PtpOperatorConfig
metadata:
  name: default
  namespace: openshift-ptp
  annotations: {}
spec:
  daemonNodeSelector:
    node-role.kubernetes.io/$mcp: ""
  ptpEventConfig:
    apiVersion: $event_api_version
    enableEventPublisher: true
    transportHost: "http://ptp-event-publisher-service-NODE_NAME.openshift-ptp.svc.cluster.local:9043"

apiVersion: ptp.openshift.io/v1
kind: PtpOperatorConfig
metadata:
  name: default
  namespace: openshift-ptp
  annotations: {}
spec:
  daemonNodeSelector:
    node-role.kubernetes.io/$mcp: ""
  ptpEventConfig:
    apiVersion: $event_api_version
    enableEventPublisher: true
    transportHost: "http://ptp-event-publisher-service-NODE_NAME.openshift-ptp.svc.cluster.local:9043"

Copy to Clipboard

Toggle word wrap

7.7.7. Extended Tuned profile
Copiar o link

Single-node OpenShift clusters that run DU workloads require additional performance tuning configurations necessary for high-performance workloads. The following example Tuned CR extends the Tuned profile:

Recommended extended Tuned profile configuration (TunedPerformancePatch.yaml)

apiVersion: tuned.openshift.io/v1
kind: Tuned
metadata:
  name: performance-patch
  namespace: openshift-cluster-node-tuning-operator
  annotations: {}
spec:
  profile:
    - name: performance-patch
      # Please note:
      # - The 'include' line must match the associated PerformanceProfile name, following below pattern
      #   include=openshift-node-performance-${PerformanceProfile.metadata.name}
      # - When using the standard (non-realtime) kernel, remove the kernel.timer_migration override from
      #   the [sysctl] section and remove the entire section if it is empty.
      data: |
        [main]
        summary=Configuration changes profile inherited from performance created tuned
        include=openshift-node-performance-openshift-node-performance-profile
        [scheduler]
        group.ice-ptp=0:f:10:*:ice-ptp.*
        group.ice-gnss=0:f:10:*:ice-gnss.*
        group.ice-dplls=0:f:10:*:ice-dplls.*
        [service]
        service.stalld=start,enable
        service.chronyd=stop,disable
  recommend:
    - machineConfigLabels:
        machineconfiguration.openshift.io/role: "$mcp"
      priority: 19
      profile: performance-patch

apiVersion: tuned.openshift.io/v1
kind: Tuned
metadata:
  name: performance-patch
  namespace: openshift-cluster-node-tuning-operator
  annotations: {}
spec:
  profile:
    - name: performance-patch
      # Please note:
      # - The 'include' line must match the associated PerformanceProfile name, following below pattern
      #   include=openshift-node-performance-${PerformanceProfile.metadata.name}
      # - When using the standard (non-realtime) kernel, remove the kernel.timer_migration override from
      #   the [sysctl] section and remove the entire section if it is empty.
      data: |
        [main]
        summary=Configuration changes profile inherited from performance created tuned
        include=openshift-node-performance-openshift-node-performance-profile
        [scheduler]
        group.ice-ptp=0:f:10:*:ice-ptp.*
        group.ice-gnss=0:f:10:*:ice-gnss.*
        group.ice-dplls=0:f:10:*:ice-dplls.*
        [service]
        service.stalld=start,enable
        service.chronyd=stop,disable
  recommend:
    - machineConfigLabels:
        machineconfiguration.openshift.io/role: "$mcp"
      priority: 19
      profile: performance-patch

Copy to Clipboard

Toggle word wrap

Expand

Table 7.4. Tuned CR options for single-node OpenShift clusters
Tuned CR field	Description
`spec.profile.data`	The `include` line that you set in `spec.profile.data` must match the associated `PerformanceProfile` CR name. For example, `include=openshift-node-performance-${PerformanceProfile.metadata.name}`.

7.7.8. SR-IOV
Copiar o link

Single root I/O virtualization (SR-IOV) is commonly used to enable fronthaul and midhaul networks. The following YAML example configures SR-IOV for a single-node OpenShift cluster.

Note

The configuration of the SriovNetwork CR will vary depending on your specific network and infrastructure requirements.

Recommended SriovOperatorConfig CR configuration (SriovOperatorConfig.yaml)

apiVersion: sriovnetwork.openshift.io/v1
kind: SriovOperatorConfig
metadata:
  name: default
  namespace: openshift-sriov-network-operator
  annotations: {}
spec:
  configDaemonNodeSelector:
    "node-role.kubernetes.io/$mcp": ""
  # Injector and OperatorWebhook pods can be disabled (set to "false") below
  # to reduce the number of management pods. It is recommended to start with the
  # webhook and injector pods enabled, and only disable them after verifying the
  # correctness of user manifests.
  #   If the injector is disabled, containers using sr-iov resources must explicitly assign
  #   them in the  "requests"/"limits" section of the container spec, for example:
  #    containers:
  #    - name: my-sriov-workload-container
  #      resources:
  #        limits:
  #          openshift.io/<resource_name>:  "1"
  #        requests:
  #          openshift.io/<resource_name>:  "1"
  enableInjector: false
  enableOperatorWebhook: false
  logLevel: 0

apiVersion: sriovnetwork.openshift.io/v1
kind: SriovOperatorConfig
metadata:
  name: default
  namespace: openshift-sriov-network-operator
  annotations: {}
spec:
  configDaemonNodeSelector:
    "node-role.kubernetes.io/$mcp": ""
  # Injector and OperatorWebhook pods can be disabled (set to "false") below
  # to reduce the number of management pods. It is recommended to start with the
  # webhook and injector pods enabled, and only disable them after verifying the
  # correctness of user manifests.
  #   If the injector is disabled, containers using sr-iov resources must explicitly assign
  #   them in the  "requests"/"limits" section of the container spec, for example:
  #    containers:
  #    - name: my-sriov-workload-container
  #      resources:
  #        limits:
  #          openshift.io/<resource_name>:  "1"
  #        requests:
  #          openshift.io/<resource_name>:  "1"
  enableInjector: false
  enableOperatorWebhook: false
  logLevel: 0

Copy to Clipboard

Toggle word wrap

Expand

Table 7.5. SriovOperatorConfig CR options for single-node OpenShift clusters
SriovOperatorConfig CR field	Description
`spec.enableInjector`	Disable `Injector` pods to reduce the number of management pods. Start with the `Injector` pods enabled, and only disable them after verifying the user manifests. If the injector is disabled, containers that use SR-IOV resources must explicitly assign them in the `requests` and `limits` section of the container spec. For example: `containers: - name: my-sriov-workload-container resources: limits: openshift.io/<resource_name>: "1" requests: openshift.io/<resource_name>: "1"` Copy to Clipboard Toggle word wrap
`spec.enableOperatorWebhook`	Disable `OperatorWebhook` pods to reduce the number of management pods. Start with the `OperatorWebhook` pods enabled, and only disable them after verifying the user manifests.

Recommended SriovNetwork configuration (SriovNetwork.yaml)

apiVersion: sriovnetwork.openshift.io/v1
kind: SriovNetwork
metadata:
  name: ""
  namespace: openshift-sriov-network-operator
  annotations: {}
spec:
  #  resourceName: ""
  networkNamespace: openshift-sriov-network-operator
#  vlan: ""
#  spoofChk: ""
#  ipam: ""
#  linkState: ""
#  maxTxRate: ""
#  minTxRate: ""
#  vlanQoS: ""
#  trust: ""
#  capabilities: ""

apiVersion: sriovnetwork.openshift.io/v1
kind: SriovNetwork
metadata:
  name: ""
  namespace: openshift-sriov-network-operator
  annotations: {}
spec:
  #  resourceName: ""
  networkNamespace: openshift-sriov-network-operator
#  vlan: ""
#  spoofChk: ""
#  ipam: ""
#  linkState: ""
#  maxTxRate: ""
#  minTxRate: ""
#  vlanQoS: ""
#  trust: ""
#  capabilities: ""

Copy to Clipboard

Toggle word wrap

Expand

Table 7.6. SriovNetwork CR options for single-node OpenShift clusters
SriovNetwork CR field	Description
`spec.vlan`	Configure `vlan` with the VLAN for the midhaul network.

Recommended SriovNetworkNodePolicy CR configuration (SriovNetworkNodePolicy.yaml)

apiVersion: sriovnetwork.openshift.io/v1
kind: SriovNetworkNodePolicy
metadata:
  name: $name
  namespace: openshift-sriov-network-operator
  annotations: {}
spec:
  # The attributes for Mellanox/Intel based NICs as below.
  #     deviceType: netdevice/vfio-pci
  #     isRdma: true/false
  deviceType: $deviceType
  isRdma: $isRdma
  nicSelector:
    # The exact physical function name must match the hardware used
    pfNames: [$pfNames]
  nodeSelector:
    node-role.kubernetes.io/$mcp: ""
  numVfs: $numVfs
  priority: $priority
  resourceName: $resourceName

apiVersion: sriovnetwork.openshift.io/v1
kind: SriovNetworkNodePolicy
metadata:
  name: $name
  namespace: openshift-sriov-network-operator
  annotations: {}
spec:
  # The attributes for Mellanox/Intel based NICs as below.
  #     deviceType: netdevice/vfio-pci
  #     isRdma: true/false
  deviceType: $deviceType
  isRdma: $isRdma
  nicSelector:
    # The exact physical function name must match the hardware used
    pfNames: [$pfNames]
  nodeSelector:
    node-role.kubernetes.io/$mcp: ""
  numVfs: $numVfs
  priority: $priority
  resourceName: $resourceName

Copy to Clipboard

Toggle word wrap

Expand

Table 7.7. SriovNetworkPolicy CR options for single-node OpenShift clusters
SriovNetworkNodePolicy CR field	Description
`spec.deviceType`	Configure `deviceType` as `vfio-pci` or `netdevice`. For Mellanox NICs, set `deviceType: netdevice`, and `isRdma: true`. For Intel based NICs, set `deviceType: vfio-pci` and `isRdma: false`.
`spec.nicSelector.pfNames`	Specifies the interface connected to the fronthaul network.
`spec.numVfs`	Specifies the number of VFs for the fronthaul network.
`spec.nicSelector.pfNames`	The exact name of physical function must match the hardware.

Recommended SR-IOV kernel configurations (07-sriov-related-kernel-args-master.yaml)

# Automatically generated by extra-manifests-builder
# Do not make changes directly.
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: master
  name: 07-sriov-related-kernel-args-master
spec:
  config:
    ignition:
      version: 3.2.0
  kernelArguments:
    - intel_iommu=on
    - iommu=pt

# Automatically generated by extra-manifests-builder
# Do not make changes directly.
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: master
  name: 07-sriov-related-kernel-args-master
spec:
  config:
    ignition:
      version: 3.2.0
  kernelArguments:
    - intel_iommu=on
    - iommu=pt

Copy to Clipboard

Toggle word wrap

7.7.9. Console Operator
Copiar o link

Use the cluster capabilities feature to prevent the Console Operator from being installed. When the node is centrally managed it is not needed. Removing the Operator provides additional space and capacity for application workloads.

To disable the Console Operator during the installation of the managed cluster, set the following in the spec.installConfigOverrides field of the ClusterInstance custom resource (CR):

installConfigOverrides:  "{\"capabilities\":{\"baselineCapabilitySet\": \"None\" }}"

installConfigOverrides:  "{\"capabilities\":{\"baselineCapabilitySet\": \"None\" }}"

Copy to Clipboard

Toggle word wrap

7.7.10. Alertmanager
Copiar o link

Single-node OpenShift clusters that run DU workloads require reduced CPU resources consumed by the OpenShift Container Platform monitoring components. The following ConfigMap custom resource (CR) disables Alertmanager.

Recommended cluster monitoring configuration (ReduceMonitoringFootprint.yaml)

apiVersion: v1
kind: ConfigMap
metadata:
  name: cluster-monitoring-config
  namespace: openshift-monitoring
  annotations: {}
data:
  config.yaml: |
    alertmanagerMain:
      enabled: false
    telemeterClient:
      enabled: false
    prometheusK8s:
       retention: 24h

apiVersion: v1
kind: ConfigMap
metadata:
  name: cluster-monitoring-config
  namespace: openshift-monitoring
  annotations: {}
data:
  config.yaml: |
    alertmanagerMain:
      enabled: false
    telemeterClient:
      enabled: false
    prometheusK8s:
       retention: 24h

Copy to Clipboard

Toggle word wrap

7.7.11. Operator Lifecycle Manager
Copiar o link

Single-node OpenShift clusters that run distributed unit workloads require consistent access to CPU resources. Operator Lifecycle Manager (OLM) collects performance data from Operators at regular intervals, resulting in an increase in CPU utilisation. The following ConfigMap custom resource (CR) disables the collection of Operator performance data by OLM.

Recommended cluster OLM configuration (ReduceOLMFootprint.yaml)

apiVersion: v1
kind: ConfigMap
metadata:
  name: collect-profiles-config
  namespace: openshift-operator-lifecycle-manager
data:
  pprof-config.yaml: |
    disabled: True

apiVersion: v1
kind: ConfigMap
metadata:
  name: collect-profiles-config
  namespace: openshift-operator-lifecycle-manager
data:
  pprof-config.yaml: |
    disabled: True

Copy to Clipboard

Toggle word wrap

7.7.12. LVM Storage
Copiar o link

You can dynamically provision local storage on single-node OpenShift clusters with Logical Volume Manager (LVM) Storage.

Note

The recommended storage solution for single-node OpenShift is the Local Storage Operator. Alternatively, you can use LVM Storage but it requires additional CPU resources to be allocated.

The following YAML example configures the storage of the node to be available to OpenShift Container Platform applications.

Recommended LVMCluster configuration (StorageLVMCluster.yaml)

apiVersion: lvm.topolvm.io/v1alpha1
kind: LVMCluster
metadata:
  name: lvmcluster
  namespace: openshift-storage
  annotations: {}
spec: {}
#example: creating a vg1 volume group leveraging all available disks on the node
#         except the installation disk.
#  storage:
#    deviceClasses:
#    - name: vg1
#      thinPoolConfig:
#        name: thin-pool-1
#        sizePercent: 90
#        overprovisionRatio: 10

apiVersion: lvm.topolvm.io/v1alpha1
kind: LVMCluster
metadata:
  name: lvmcluster
  namespace: openshift-storage
  annotations: {}
spec: {}
#example: creating a vg1 volume group leveraging all available disks on the node
#         except the installation disk.
#  storage:
#    deviceClasses:
#    - name: vg1
#      thinPoolConfig:
#        name: thin-pool-1
#        sizePercent: 90
#        overprovisionRatio: 10

Copy to Clipboard

Toggle word wrap

Expand

Table 7.8. LVMCluster CR options for single-node OpenShift clusters
LVMCluster CR field	Description
`deviceSelector.paths`	Configure the disks used for LVM storage. If no disks are specified, the LVM Storage uses all the unused disks in the specified thin pool.

7.7.13. Network diagnostics
Copiar o link

Single-node OpenShift clusters that run DU workloads require less inter-pod network connectivity checks to reduce the additional load created by these pods. The following custom resource (CR) disables these checks.

Recommended network diagnostics configuration (DisableSnoNetworkDiag.yaml)

apiVersion: operator.openshift.io/v1
kind: Network
metadata:
  name: cluster
  annotations: {}
spec:
  disableNetworkDiagnostics: true

apiVersion: operator.openshift.io/v1
kind: Network
metadata:
  name: cluster
  annotations: {}
spec:
  disableNetworkDiagnostics: true

Copy to Clipboard

Toggle word wrap

Additional resources

Deploying far edge sites using ZTP

Este conteúdo não está disponível no idioma selecionado.

Chapter 7. Recommended single-node OpenShift cluster configuration for vDU application workloads

7.1. Running low latency applications on OpenShift Container Platform
Copiar o link

7.2. Recommended cluster host requirements for vDU application workloads
Copiar o link

7.3. Configuring host firmware for low latency and high performance
Copiar o link

7.4. Connectivity prerequisites for managed cluster networks
Copiar o link

7.5. Workload partitioning in single-node OpenShift with GitOps ZTP
Copiar o link

7.6. Recommended cluster install manifests
Copiar o link

7.6.1. Reduced platform management footprint
Copiar o link

7.6.2. SCTP
Copiar o link

7.6.3. Setting rcu_normal
Copiar o link

7.6.4. Automatic kernel crash dumps with kdump
Copiar o link

7.6.5. Disable automatic CRI-O cache wipe
Copiar o link

7.6.6. Configuring crun as the default container runtime
Copiar o link

Aprender

Experimente, compre e venda

Comunidades

Sobre a documentação da Red Hat

Tornando o open source mais inclusivo

Sobre a Red Hat

Theme

Red Hat legal and privacy links

Red Hat legal and privacy links

Este conteúdo não está disponível no idioma selecionado.

Chapter 7. Recommended single-node OpenShift cluster configuration for vDU application workloads

7.1. Running low latency applications on OpenShift Container PlatformCopiar o linkLink copiado para a área de transferência!

7.2. Recommended cluster host requirements for vDU application workloadsCopiar o linkLink copiado para a área de transferência!

7.3. Configuring host firmware for low latency and high performanceCopiar o linkLink copiado para a área de transferência!

7.4. Connectivity prerequisites for managed cluster networksCopiar o linkLink copiado para a área de transferência!

7.5. Workload partitioning in single-node OpenShift with GitOps ZTPCopiar o linkLink copiado para a área de transferência!

7.6. Recommended cluster install manifestsCopiar o linkLink copiado para a área de transferência!

7.6.1. Reduced platform management footprintCopiar o linkLink copiado para a área de transferência!

7.6.2. SCTPCopiar o linkLink copiado para a área de transferência!

7.6.3. Setting rcu_normalCopiar o linkLink copiado para a área de transferência!

7.6.4. Automatic kernel crash dumps with kdumpCopiar o linkLink copiado para a área de transferência!

7.6.5. Disable automatic CRI-O cache wipeCopiar o linkLink copiado para a área de transferência!

7.6.6. Configuring crun as the default container runtimeCopiar o linkLink copiado para a área de transferência!

Aprender

Experimente, compre e venda

Comunidades

Sobre a documentação da Red Hat

Tornando o open source mais inclusivo

Sobre a Red Hat

Theme

Red Hat legal and privacy links

Red Hat legal and privacy links

7.1. Running low latency applications on OpenShift Container Platform
Copiar o link

7.2. Recommended cluster host requirements for vDU application workloads
Copiar o link

7.3. Configuring host firmware for low latency and high performance
Copiar o link

7.4. Connectivity prerequisites for managed cluster networks
Copiar o link

7.5. Workload partitioning in single-node OpenShift with GitOps ZTP
Copiar o link

7.6. Recommended cluster install manifests
Copiar o link

7.6.1. Reduced platform management footprint
Copiar o link

7.6.2. SCTP
Copiar o link

7.6.3. Setting rcu_normal
Copiar o link

7.6.4. Automatic kernel crash dumps with kdump
Copiar o link

7.6.5. Disable automatic CRI-O cache wipe
Copiar o link

7.6.6. Configuring crun as the default container runtime
Copiar o link