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Chapter 3. Manually upgrading using the roxctl CLI

You can upgrade to the latest version of Red Hat Advanced Cluster Security for Kubernetes (RHACS) from a supported older version.

Important
  • You need to perform the manual upgrade procedure only if you used the roxctl CLI to install RHACS.
  • There are manual steps for each version upgrade that must be followed, for example, from version 3.74 to version 4.0, and from version 4.0 to version 4.1. Therefore, Red Hat recommends upgrading first from 3.74 to 4.0, then from 4.0 to 4.1, then 4.1 to 4.2, until the selected version is installed. For full functionality, Red Hat recommends upgrading to the most recent version.

To upgrade RHACS to the latest version, perform the following steps:

  1. Backup the Central database
  2. Upgrade the roxctl CLI
  3. Upgrade the Central cluster
  4. Upgrade all secured clusters

3.1. Backing up the Central database

You can back up the Central database and use that backup for rolling back from a failed upgrade or data restoration in the case of an infrastructure disaster.

Prerequisites

  • You must have an API token with read permission for all resources of Red Hat Advanced Cluster Security for Kubernetes. The Analyst system role has read permissions for all resources.
  • You have installed the roxctl CLI.
  • You have configured the ROX_API_TOKEN and the ROX_CENTRAL_ADDRESS environment variables.

Procedure

  • Run the backup command: 

    $ roxctl -e "$ROX_CENTRAL_ADDRESS" central backup

Additional resources

3.2. Upgrading the roxctl CLI

To upgrade the roxctl CLI to the latest version you must uninstall the existing version of roxctl CLI and then install the latest version of the roxctl CLI.

3.2.1. Uninstalling the roxctl CLI

You can uninstall the roxctl CLI binary on Linux by using the following procedure.

Procedure

  • Find and delete the roxctl binary: 

    $ ROXPATH=$(which roxctl) && rm -f $ROXPATH 1
    1
    Depending on your environment, you might need administrator rights to delete the roxctl binary.

3.2.2. Installing the roxctl CLI on Linux

You can install the roxctl CLI binary on Linux by using the following procedure.

Note

roxctl CLI for Linux is available for amd64, arm64, ppc64le, and s390x architectures.

Procedure

  1. Determine the roxctl architecture for the target operating system: 

    $ arch="$(uname -m | sed "s/x86_64//")"; arch="${arch:+-$arch}"

  2. Download the roxctl CLI: 

    $ curl -L -f -o roxctl "https://mirror.openshift.com/pub/rhacs/assets/4.5.5/bin/Linux/roxctl${arch}"

  3. Make the roxctl binary executable: 

    $ chmod +x roxctl

  4. Place the roxctl binary in a directory that is on your PATH:

    To check your PATH, execute the following command: 

    $ echo $PATH

Verification

  • Verify the roxctl version you have installed: 

    $ roxctl version

3.2.3. Installing the roxctl CLI on macOS

You can install the roxctl CLI binary on macOS by using the following procedure.

Note

roxctl CLI for macOS is available for amd64 and arm64 architectures.

Procedure

  1. Determine the roxctl architecture for the target operating system: 

    $ arch="$(uname -m | sed "s/x86_64//")"; arch="${arch:+-$arch}"

  2. Download the roxctl CLI: 

    $ curl -L -f -o roxctl "https://mirror.openshift.com/pub/rhacs/assets/4.5.5/bin/Darwin/roxctl${arch}"

  3. Remove all extended attributes from the binary: 

    $ xattr -c roxctl

  4. Make the roxctl binary executable: 

    $ chmod +x roxctl

  5. Place the roxctl binary in a directory that is on your PATH:

    To check your PATH, execute the following command: 

    $ echo $PATH

Verification

  • Verify the roxctl version you have installed: 

    $ roxctl version

3.2.4. Installing the roxctl CLI on Windows

You can install the roxctl CLI binary on Windows by using the following procedure.

Note

roxctl CLI for Windows is available for the amd64 architecture.

Procedure

  • Download the roxctl CLI: 

    $ curl -f -O https://mirror.openshift.com/pub/rhacs/assets/4.5.5/bin/Windows/roxctl.exe

Verification

  • Verify the roxctl version you have installed: 

    $ roxctl version

3.3. Upgrading the Central cluster

After you have created a backup of the Central database and generated the necessary resources by using the provisioning bundle, the next step is to upgrade the Central cluster. This process involves upgrading Central and Scanner.

3.3.1. Upgrading Central

You can update Central to the latest version by downloading and deploying the updated images.

Procedure

  • Run the following command to update the Central image: 

    $ oc -n stackrox set image deploy/central central=registry.redhat.io/advanced-cluster-security/rhacs-main-rhel8:4.5.5 1
    1
    If you use Kubernetes, enter kubectl instead of oc.

Verification

  • Verify that the new pods have deployed: 

    $ oc get deploy -n stackrox -o wide
    $ oc get pod -n stackrox --watch

3.3.1.1. Editing the GOMEMLIMIT environment variable for the Central deployment

Upgrading to version 4.4 requires that you manually replace the GOMEMLIMIT environment variable with the ROX_MEMLIMIT environment variable. You must edit this variable for each deployment.

Procedure

  1. Run the following command to edit the variable for the Central deployment: 

    $ oc -n stackrox edit deploy/central 1
    1
    If you use Kubernetes, enter kubectl instead of oc.
  2. Replace the GOMEMLIMIT variable with ROX_MEMLIMIT.
  3. Save the file.

3.3.2. Upgrading Scanner

You can update Scanner to the latest version by downloading and deploying the updated images.

Procedure

  • Run the following command to update the Scanner image: 

    $ oc -n stackrox set image deploy/scanner scanner=registry.redhat.io/advanced-cluster-security/rhacs-scanner-rhel8:4.5.5 1
    1
    If you use Kubernetes, enter kubectl instead of oc.

Verification

  • Verify that the new pods have deployed: 

    $ oc get deploy -n stackrox -o wide
    $ oc get pod -n stackrox --watch

3.3.2.1. Editing the GOMEMLIMIT environment variable for the Scanner deployment

Upgrading to version 4.4 requires that you manually replace the GOMEMLIMIT environment variable with the ROX_MEMLIMIT environment variable. You must edit this variable for each deployment.

Procedure

  1. Run the following command to edit the variable for the Scanner deployment: 

    $ oc -n stackrox edit deploy/scanner 1
    1
    If you use Kubernetes, enter kubectl instead of oc.
  2. Replace the GOMEMLIMIT variable with ROX_MEMLIMIT.
  3. Save the file.

3.3.3. Verifying the Central cluster upgrade

After you have upgraded both Central and Scanner, verify that the Central cluster upgrade is complete.

Procedure

  • Check the Central logs by running the following command: 

    $ oc logs -n stackrox deploy/central -c central 1
    1
    If you use Kubernetes, enter kubectl instead of oc.

Sample output of a successful upgrade

No database restore directory found (this is not an error).
Migrator: 2023/04/19 17:58:54: starting DB compaction
Migrator: 2023/04/19 17:58:54: Free fraction of 0.0391 (40960/1048576) is < 0.7500. Will not compact
badger 2023/04/19 17:58:54 INFO: All 1 tables opened in 2ms
badger 2023/04/19 17:58:55 INFO: Replaying file id: 0 at offset: 846357
badger 2023/04/19 17:58:55 INFO: Replay took: 50.324µs
badger 2023/04/19 17:58:55 DEBUG: Value log discard stats empty
Migrator: 2023/04/19 17:58:55: DB is up to date. Nothing to do here.
badger 2023/04/19 17:58:55 INFO: Got compaction priority: {level:0 score:1.73 dropPrefix:[]}
version: 2023/04/19 17:58:55.189866 ensure.go:49: Info: Version found in the DB was current. We’re good to go!

3.4. Upgrading all secured clusters

After upgrading Central services, you must upgrade all secured clusters.

Important

  • If you are using automatic upgrades:

  • If you are not using automatic upgrades, you must run the instructions in this section on all secured clusters including the Central cluster.

    • To ensure optimal functionality, use the same RHACS version for your secured clusters and the cluster on which Central is installed.

To complete manual upgrades of each secured cluster running Sensor, Collector, and Admission controller, follow the instructions in this section.

3.4.1. Updating other images

You must update the sensor, collector and compliance images on each secured cluster when not using automatic upgrades.

Note

If you are using Kubernetes, use kubectl instead of oc for the commands listed in this procedure.

Procedure

  1. Update the Sensor image: 

    $ oc -n stackrox set image deploy/sensor sensor=registry.redhat.io/advanced-cluster-security/rhacs-main-rhel8:4.5.5 1
    1
    If you use Kubernetes, enter kubectl instead of oc.

  2. Update the Compliance image: 

    $ oc -n stackrox set image ds/collector compliance=registry.redhat.io/advanced-cluster-security/rhacs-main-rhel8:4.5.5 1
    1
    If you use Kubernetes, enter kubectl instead of oc.

  3. Update the Collector image: 

    $ oc -n stackrox set image ds/collector collector=registry.redhat.io/advanced-cluster-security/rhacs-collector-rhel8:4.5.5 1
    1
    If you use Kubernetes, enter kubectl instead of oc.
    Note

    If you are using the collector slim image, run the following command instead: 

    $ oc -n stackrox set image ds/collector collector=registry.redhat.io/advanced-cluster-security/rhacs-collector-slim-rhel8:{rhacs-version}

  4. Update the admission control image: 

    $ oc -n stackrox set image deploy/admission-control admission-control=registry.redhat.io/advanced-cluster-security/rhacs-main-rhel8:4.5.5
Important

If you have installed RHACS on Red Hat OpenShift by using the roxctl CLI, you need to migrate the security context constraints (SCCs).

For more information, see "Migrating SCCs during the manual upgrade" in the "Additional resources" section.

Next steps

Additional resources

3.4.2. Migrating SCCs during the manual upgrade

By migrating the security context constraints (SCCs) during the manual upgrade by using roxctl CLI, you can seamlessly transition the Red Hat Advanced Cluster Security for Kubernetes (RHACS) services to use the Red Hat OpenShift SCCs, ensuring compatibility and optimal security configurations across Central and all secured clusters.

Procedure

  1. List all of the RHACS services that are deployed on Central and all secured clusters: 

    $ oc -n stackrox describe pods | grep 'openshift.io/scc\|^Name:'

    Example output

    Name:      admission-control-6f4dcc6b4c-2phwd
           openshift.io/scc: stackrox-admission-control
#...
Name:      central-575487bfcb-sjdx8
           openshift.io/scc: stackrox-central
Name:      central-db-7c7885bb-6bgbd
           openshift.io/scc: stackrox-central-db
Name:      collector-56nkr
           openshift.io/scc: stackrox-collector
#...
Name:      scanner-68fc55b599-f2wm6
           openshift.io/scc: stackrox-scanner
Name:      scanner-68fc55b599-fztlh
#...
Name:      sensor-84545f86b7-xgdwf
           openshift.io/scc: stackrox-sensor
#...

    In this example, you can see that each pod has its own custom SCC, which is specified through the openshift.io/scc field.

  2. Add the required roles and role bindings to use the Red Hat OpenShift SCCs instead of the RHACS custom SCCs.

    To add the required roles and role bindings to use the Red Hat OpenShift SCCs for the Central cluster, complete the following steps:

    1. Create a file named update-central.yaml that defines the role and role binding resources by using the following content:

      Example 3.1. Example YAML file

      apiVersion: rbac.authorization.k8s.io/v1
kind: Role 1
metadata:
  annotations:
     email: support@stackrox.com
     owner: stackrox
  labels:
     app.kubernetes.io/component: central
     app.kubernetes.io/instance: stackrox-central-services
     app.kubernetes.io/name: stackrox
     app.kubernetes.io/part-of: stackrox-central-services
     app.kubernetes.io/version: 4.4.0
  name: use-central-db-scc 2
  namespace: stackrox 3
Rules: 4
- apiGroups:
  - security.openshift.io
  resourceNames:
  - nonroot-v2
  resources:
  - securitycontextconstraints
  verbs:
  - use
- - -
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  annotations:
     email: support@stackrox.com
     owner: stackrox
  labels:
     app.kubernetes.io/component: central
     app.kubernetes.io/instance: stackrox-central-services
     app.kubernetes.io/managed-by: Helm
     app.kubernetes.io/name: stackrox
     app.kubernetes.io/part-of: stackrox-central-services
     app.kubernetes.io/version: 4.4.0
  name: use-central-scc
  namespace: stackrox
rules:
- apiGroups:
  - security.openshift.io
  resourceNames:
  - nonroot-v2
  resources:
  - securitycontextconstraints
  verbs:
  - use
- - -
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  annotations:
     email: support@stackrox.com
     owner: stackrox
  labels:
     app.kubernetes.io/component: scanner
     app.kubernetes.io/instance: stackrox-central-services
     app.kubernetes.io/name: stackrox
     app.kubernetes.io/part-of: stackrox-central-services
     app.kubernetes.io/version: 4.4.0
  name: use-scanner-scc
  namespace: stackrox
rules:
- apiGroups:
  - security.openshift.io
  resourceNames:
  - nonroot-v2
  resources:
  - securitycontextconstraints
  verbs:
  - use
- - -
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding 5
metadata:
  annotations:
     email: support@stackrox.com
     owner: stackrox
  labels:
     app.kubernetes.io/component: central
     app.kubernetes.io/instance: stackrox-central-services
     app.kubernetes.io/name: stackrox
     app.k ubernetes.io/part-of: stackrox-central-services
     app.kubernetes.io/version: 4.4.0
  name: central-db-use-scc 6
  namespace: stackrox
roleRef: 7
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: use-central-db-scc
subjects: 8
- kind: ServiceAccount
  name: central-db
  namespace: stackrox
- - -
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  annotations:
     email: support@stackrox.com
     owner: stackrox
  labels:
     app.kubernetes.io/component: central
     app.kubernetes.io/instance: stackrox-central-services
     app.kubernetes.io/name: stackrox
     app.kubernetes.io/part-of: stackrox-central-services
     app.kubernetes.io/version: 4.4.0
  name: central-use-scc
  namespace: stackrox
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: use-central-scc
subjects:
- kind: ServiceAccount
  name: central
  namespace: stackrox
- - -
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  annotations:
     email: support@stackrox.com
     owner: stackrox
  labels:
     app.kubernetes.io/component: scanner
     app.kubernetes.io/instance: stackrox-central-services
     app.kubernetes.io/name: stackrox
     app.kubernetes.io/part-of: stackrox-central-services
     app.kubernetes.io/version: 4.4.0
  name: scanner-use-scc
  namespace: stackrox
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: use-scanner-scc
subjects:
- kind: ServiceAccount
  name: scanner
  namespace: stackrox
- - -
      1
      The type of Kubernetes resource, in this example, Role.
      2
      The name of the role resource.
      3
      The namespace in which the role is created.
      4
      Describes the permissions granted by the role resource.
      5
      The type of Kubernetes resource, in this example, RoleBinding.
      6
      The name of the role binding resource.
      7
      Specifies the role to bind in the same namespace.
      8
      Specifies the subjects that are bound to the role.

    2. Create the role and role binding resources specified in the update-central.yaml file by running the following command: 

      $ oc -n stackrox create -f ./update-central.yaml

  3. To add the required roles and role bindings to use the Red Hat OpenShift SCCs for all secured clusters, complete the following steps:

    1. Create a file named upgrade-scs.yaml that defines the role and role binding resources by using the following content:

      Example 3.2. Example YAML file

      apiVersion: rbac.authorization.k8s.io/v1
kind: Role  1
metadata:
  annotations:
     email: support@stackrox.com
     owner: stackrox
  labels:
     app.kubernetes.io/component: collector
     app.kubernetes.io/instance: stackrox-secured-cluster-services
     app.kubernetes.io/name: stackrox
     app.kubernetes.io/part-of: stackrox-secured-cluster-services
     app.kubernetes.io/version: 4.4.0
     auto-upgrade.stackrox.io/component: sensor
  name: use-privileged-scc  2
  namespace: stackrox 3
rules:  4
- apiGroups:
  - security.openshift.io
  resourceNames:
  - privileged
  resources:
  - securitycontextconstraints
  verbs:
  - use
- - -
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding 5
metadata:
  annotations:
     email: support@stackrox.com
     owner: stackrox
  labels:
     app.kubernetes.io/component: collector
     app.kubernetes.io/instance: stackrox-secured-cluster-services
     app.kubernetes.io/name: stackrox
     app.kubernetes.io/part-of: stackrox-secured-cluster-services
     app.kubernetes.io/version: 4.4.0
     auto-upgrade.stackrox.io/component: sensor
  name: collector-use-scc 6
  namespace: stackrox
roleRef: 7
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: use-privileged-scc
subjects: 8
- kind: ServiceAccount
  name: collector
  namespace: stackrox
- - -
      1
      The type of Kubernetes resource, in this example, Role.
      2
      The name of the role resource.
      3
      The namespace in which the role is created.
      4
      Describes the permissions granted by the role resource.
      5
      The type of Kubernetes resource, in this example, RoleBinding.
      6
      The name of the role binding resource.
      7
      Specifies the role to bind in the same namespace.
      8
      Specifies the subjects that are bound to the role.

    2. Create the role and role binding resources specified in the upgrade-scs.yaml file by running the following command: 

      $ oc -n stackrox create -f ./update-scs.yaml
      Important

      You must run this command on each secured cluster to create the role and role bindings specified in the upgrade-scs.yaml file.

  4. Delete the SCCs that are specific to RHACS:

    1. To delete the SCCs that are specific to the Central cluster, run the following command: 

      $ oc delete scc/stackrox-central scc/stackrox-central-db scc/stackrox-scanner

    2. To delete the SCCs that are specific to all secured clusters, run the following command: 

      $ oc delete scc/stackrox-admission-control scc/stackrox-collector scc/stackrox-sensor
      Important

      You must run this command on each secured cluster to delete the SCCs that are specific to each secured cluster.

Verification

  • Ensure that all the pods are using the correct SCCs by running the following command: 

    $ oc -n stackrox describe pods | grep 'openshift.io/scc\|^Name:'

    Compare the output with the following table:

    ComponentPrevious custom SCCNew Red Hat OpenShift 4 SCC

    Central

    stackrox-central

    nonroot-v2

    Central-db

    stackrox-central-db

    nonroot-v2

    Scanner

    stackrox-scanner

    nonroot-v2

    Scanner-db

    stackrox-scanner

    nonroot-v2

    Admission Controller

    stackrox-admission-control

    restricted-v2

    Collector

    stackrox-collector

    privileged

    Sensor

    stackrox-sensor

    restricted-v2

3.4.2.1. Editing the GOMEMLIMIT environment variable for the Sensor deployment

Upgrading to version 4.4 requires that you manually replace the GOMEMLIMIT environment variable with the ROX_MEMLIMIT environment variable. You must edit this variable for each deployment.

Procedure

  1. Run the following command to edit the variable for the Sensor deployment: 

    $ oc -n stackrox edit deploy/sensor 1
    1
    If you use Kubernetes, enter kubectl instead of oc.
  2. Replace the GOMEMLIMIT variable with ROX_MEMLIMIT.
  3. Save the file.

3.4.2.2. Editing the GOMEMLIMIT environment variable for the Collector deployment

Upgrading to version 4.4 requires that you manually replace the GOMEMLIMIT environment variable with the ROX_MEMLIMIT environment variable. You must edit this variable for each deployment.

Procedure

  1. Run the following command to edit the variable for the Collector deployment: 

    $ oc -n stackrox edit deploy/collector 1
    1
    If you use Kubernetes, enter kubectl instead of oc.
  2. Replace the GOMEMLIMIT variable with ROX_MEMLIMIT.
  3. Save the file.

3.4.2.3. Editing the GOMEMLIMIT environment variable for the Admission Controller deployment

Upgrading to version 4.4 requires that you manually replace the GOMEMLIMIT environment variable with the ROX_MEMLIMIT environment variable. You must edit this variable for each deployment.

Procedure

  1. Run the following command to edit the variable for the Admission Controller deployment: 

    $ oc -n stackrox edit deploy/admission-control 1
    1
    If you use Kubernetes, enter kubectl instead of oc.
  2. Replace the GOMEMLIMIT variable with ROX_MEMLIMIT.
  3. Save the file.

3.4.2.4. Verifying secured cluster upgrade

After you have upgraded secured clusters, verify that the updated pods are working.

Procedure

  • Check that the new pods have deployed: 

    $ oc get deploy,ds -n stackrox -o wide 1
    1
    If you use Kubernetes, enter kubectl instead of oc. 
    $ oc get pod -n stackrox --watch 1
    1
    If you use Kubernetes, enter kubectl instead of oc.

3.5. Enabling RHCOS node scanning

If you use OpenShift Container Platform, you can enable scanning of Red Hat Enterprise Linux CoreOS (RHCOS) nodes for vulnerabilities by using Red Hat Advanced Cluster Security for Kubernetes (RHACS).

Prerequisites

Procedure

  1. Run one of the following commands to update the compliance container.

    • For a default compliance container with metrics disabled, run the following command: 

      $ oc -n stackrox patch daemonset/collector -p '{"spec":{"template":{"spec":{"containers":[{"name":"compliance","env":[{"name":"ROX_METRICS_PORT","value":"disabled"},{"name":"ROX_NODE_SCANNING_ENDPOINT","value":"127.0.0.1:8444"},{"name":"ROX_NODE_SCANNING_INTERVAL","value":"4h"},{"name":"ROX_NODE_SCANNING_INTERVAL_DEVIATION","value":"24m"},{"name":"ROX_NODE_SCANNING_MAX_INITIAL_WAIT","value":"5m"},{"name":"ROX_RHCOS_NODE_SCANNING","value":"true"},{"name":"ROX_CALL_NODE_INVENTORY_ENABLED","value":"true"}]}]}}}}'

    • For a compliance container with Prometheus metrics enabled, run the following command: 

      $ oc -n stackrox patch daemonset/collector -p '{"spec":{"template":{"spec":{"containers":[{"name":"compliance","env":[{"name":"ROX_METRICS_PORT","value":":9091"},{"name":"ROX_NODE_SCANNING_ENDPOINT","value":"127.0.0.1:8444"},{"name":"ROX_NODE_SCANNING_INTERVAL","value":"4h"},{"name":"ROX_NODE_SCANNING_INTERVAL_DEVIATION","value":"24m"},{"name":"ROX_NODE_SCANNING_MAX_INITIAL_WAIT","value":"5m"},{"name":"ROX_RHCOS_NODE_SCANNING","value":"true"},{"name":"ROX_CALL_NODE_INVENTORY_ENABLED","value":"true"}]}]}}}}'

  2. Update the Collector DaemonSet (DS) by taking the following steps:

    1. Add new volume mounts to Collector DS by running the following command: 

      $ oc -n stackrox patch daemonset/collector -p '{"spec":{"template":{"spec":{"volumes":[{"name":"tmp-volume","emptyDir":{}},{"name":"cache-volume","emptyDir":{"sizeLimit":"200Mi"}}]}}}}'

    2. Add the new NodeScanner container by running the following command: 

      $ oc -n stackrox patch daemonset/collector -p '{"spec":{"template":{"spec":{"containers":[{"command":["/scanner","--nodeinventory","--config=",""],"env":[{"name":"ROX_NODE_NAME","valueFrom":{"fieldRef":{"apiVersion":"v1","fieldPath":"spec.nodeName"}}},{"name":"ROX_CLAIR_V4_SCANNING","value":"true"},{"name":"ROX_COMPLIANCE_OPERATOR_INTEGRATION","value":"true"},{"name":"ROX_CSV_EXPORT","value":"false"},{"name":"ROX_DECLARATIVE_CONFIGURATION","value":"false"},{"name":"ROX_INTEGRATIONS_AS_CONFIG","value":"false"},{"name":"ROX_NETPOL_FIELDS","value":"true"},{"name":"ROX_NETWORK_DETECTION_BASELINE_SIMULATION","value":"true"},{"name":"ROX_NETWORK_GRAPH_PATTERNFLY","value":"true"},{"name":"ROX_NODE_SCANNING_CACHE_TIME","value":"3h36m"},{"name":"ROX_NODE_SCANNING_INITIAL_BACKOFF","value":"30s"},{"name":"ROX_NODE_SCANNING_MAX_BACKOFF","value":"5m"},{"name":"ROX_PROCESSES_LISTENING_ON_PORT","value":"false"},{"name":"ROX_QUAY_ROBOT_ACCOUNTS","value":"true"},{"name":"ROX_ROXCTL_NETPOL_GENERATE","value":"true"},{"name":"ROX_SOURCED_AUTOGENERATED_INTEGRATIONS","value":"false"},{"name":"ROX_SYSLOG_EXTRA_FIELDS","value":"true"},{"name":"ROX_SYSTEM_HEALTH_PF","value":"false"},{"name":"ROX_VULN_MGMT_WORKLOAD_CVES","value":"false"}],"image":"registry.redhat.io/advanced-cluster-security/rhacs-scanner-slim-rhel8:4.5.5","imagePullPolicy":"IfNotPresent","name":"node-inventory","ports":[{"containerPort":8444,"name":"grpc","protocol":"TCP"}],"volumeMounts":[{"mountPath":"/host","name":"host-root-ro","readOnly":true},{"mountPath":"/tmp/","name":"tmp-volume"},{"mountPath":"/cache","name":"cache-volume"}]}]}}}}'

Additional resources

3.6. Removing Central-attached PV after upgrading to version 4.1 and later

Kubernetes and OpenShift Container Platform do not delete persistent volumes (PV) automatically. When you upgrade RHACS from earlier versions, the Central PV called stackrox-db remains mounted. However, in RHACS 4.1, Central does not need the previously attached PV anymore.

The PV has data and persistent files used by earlier RHACS versions. You can use the PV to roll back to an earlier version before RHACS 4.1. Or, if you have a large RocksDB backup bundle for Central, you can use the PV to restore that data.

After you complete the upgrade to 4.1, you can remove the Central-attached persistent volume claim (PVC) to free up the storage. Only remove the PVC if you do not plan to roll back or restore from earlier RocksDB backups.

Warning

After removing PVC, you cannot roll back Central to an earlier version before RHACS 4.1 or restore large RocksDB backups created with RocksDB.

3.6.1. Removing Central-attached PV using the roxctl CLI

Remove the Central-attached persistent volume claim (PVC) stackrox-db to free up storage space.

Procedure

  • Run the following command: 

    $ oc get deployment central -n stackrox -o json | jq '(.spec.template.spec.volumes[] | select(.name=="stackrox-db"))={"name": "stackrox-db", "emptyDir": {}}' | oc apply -f -

    It replaces the stackrox-db` entry in the spec.template.spec.volumes to a local emptyDir.

Verification

  • Run the following command: 

    $ oc -n stackrox describe pvc stackrox-db | grep -i 'Used By'
Used By: <none> 1
    1
    Wait until you see Used By: <none>. It might take a few minutes.

3.7. Rolling back Central

You can roll back to a previous version of Central if the upgrade to a new version is unsuccessful.

3.7.1. Rolling back Central normally

You can roll back to a previous version of Central if upgrading Red Hat Advanced Cluster Security for Kubernetes fails.

Prerequisites

  • Before you can perform a rollback, you must have free disk space available on your persistent storage. Red Hat Advanced Cluster Security for Kubernetes uses disk space to keep a copy of databases during the upgrade. If the disk space is not enough to store a copy and the upgrade fails, you might not be able to roll back to an earlier version.

Procedure

  • Run the following command to roll back to a previous version when an upgrade fails (before the Central service starts): 

    $ oc -n stackrox rollout undo deploy/central 1
    1
    If you use Kubernetes, enter kubectl instead of oc.

3.7.2. Rolling back Central forcefully

You can use forced rollback to roll back to an earlier version of Central (after the Central service starts).

Important

Using forced rollback to switch back to a previous version might result in loss of data and functionality.

Prerequisites

  • Before you can perform a rollback, you must have free disk space available on your persistent storage. Red Hat Advanced Cluster Security for Kubernetes uses disk space to keep a copy of databases during the upgrade. If the disk space is not enough to store a copy and the upgrade fails, you will not be able to roll back to an earlier version.

Procedure

  • Run the following commands to perform a forced rollback:

    • To forcefully rollback to the previously installed version: 

      $ oc -n stackrox rollout undo deploy/central 1
      1
      If you use Kubernetes, enter kubectl instead of oc.

    • To forcefully rollback to a specific version:

      1. Edit Central’s ConfigMap: 

        $ oc -n stackrox edit configmap/central-config 1
        1
        If you use Kubernetes, enter kubectl instead of oc.

      2. Update the value of the maintenance.forceRollbackVersion key: 

        data:
  central-config.yaml: |
    maintenance:
      safeMode: false
      compaction:
         enabled: true
         bucketFillFraction: .5
         freeFractionThreshold: 0.75
      forceRollbackVersion: <x.x.x.x> 1
  ...
        1
        Specify the version that you want to roll back to.

      3. Update the Central image version: 

        $ oc -n stackrox \ 1
  set image deploy/central central=registry.redhat.io/advanced-cluster-security/rhacs-main-rhel8:<x.x.x.x> 2
        1
        If you use Kubernetes, enter kubectl instead of oc.
        2
        Specify the version that you want to roll back to. It must be the same version that you specified for the maintenance.forceRollbackVersion key in the central-config config map.

3.8. Verifying upgrades

The updated Sensors and Collectors continue to report the latest data from each secured cluster.

The last time Sensor contacted Central is visible in the RHACS portal.

Procedure

  1. In the RHACS portal, go to Platform Configuration System Health.
  2. Check to ensure that Sensor Upgrade shows clusters up to date with Central.

3.9. Revoking the API token

For security reasons, Red Hat recommends that you revoke the API token that you have used to complete Central database backup.

Prerequisites

  • After the upgrade, you must reload the RHACS portal page and re-accept the certificate to continue using the RHACS portal.

Procedure

  1. In the RHACS portal, go to Platform Configuration Integrations.
  2. Scroll down to the Authentication Tokens category, and click API Token.
  3. Select the checkbox in front of the token name that you want to revoke.
  4. Click Revoke.
  5. On the confirmation dialog box, click Confirm.

3.10. Troubleshooting the cluster upgrader

If you encounter problems when using the legacy installation method for the secured cluster and enabling the automated updates, you can try troubleshooting the problem. The following errors can be found in the clusters view when the upgrader fails.

3.10.1. Upgrader is missing permissions

Symptom

The following error is displayed in the cluster page: 

Upgrader failed to execute PreflightStage of the roll-forward workflow: executing stage "Run preflight checks": preflight check "Kubernetes authorization" reported errors. This usually means that access is denied. Have you configured this Secured Cluster for automatically receiving upgrades?"

Procedure

  1. Ensure that the bundle for the secured cluster was generated with future upgrades enabled before clicking Download YAML file and keys.
  2. If possible, remove that secured cluster and generate a new bundle making sure that future upgrades are enabled.

  3. If you cannot re-create the cluster, you can take these actions:

    1. Ensure that the service account sensor-upgrader exists in the same namespace as Sensor.
    2. Ensure that a ClusterRoleBinding exists (default name: <namespace>:upgrade-sensors) that grants the cluster-admin ClusterRole to the sensor-upgrader service account.

3.10.2. Upgrader cannot start due to missing image

Symptom

The following error is displayed in the cluster page: 

"Upgrade initialization error: The upgrader pods have trouble pulling the new image: Error pulling image: (...) (<image_reference:tag>: not found)"

Procedure

  1. Ensure that the Secured Cluster can access the registry and pull the image <image_reference:tag>.
  2. Ensure that the image pull secrets are configured correctly in the secured cluster.

3.10.3. Upgrader cannot start due to an unknown reason

Symptom

The following error is displayed in the cluster page: 

"Upgrade initialization error: Pod terminated: (Error)"

Procedure

  1. Ensure that the upgrader has enough permissions for accessing the cluster objects. For more information, see "Upgrader is missing permissions".
  2. Check the upgrader logs for more insights.

3.10.3.1. Obtaining upgrader logs

The logs can be accessed by running the following command: 

$ kubectl -n <namespace> logs deploy/sensor-upgrader 1
1
For <namespace>, specify the namespace in which Sensor is running.

Usually, the upgrader deployment is only running in the cluster for a short time while doing the upgrades. It is removed later, so accessing its logs using the orchestrator CLI can require proper timing.

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