6.2. Creating infrastructure machine sets for production environments

In a production deployment, deploy at least three machine sets to hold infrastructure components. Both the logging aggregation solution and the service mesh deploy Elasticsearch, and Elasticsearch requires three instances that are installed on different nodes. For high availability, deploy these nodes to different availability zones. Since you need different machine sets for each availability zone, create at least three machine sets.

6.2.1. Creating machine sets for different clouds

Use the sample machine set for your cloud.

6.2.1.1. Sample YAML for a machine set custom resource on AWS

This sample YAML defines a machine set that runs in the us-east-1a Amazon Web Services (AWS) zone and creates nodes that are labeled with node-role.kubernetes.io/<role>: ""

In this sample, <infrastructureID> is the infrastructure ID label that is based on the cluster ID that you set when you provisioned the cluster, and <role> is the node label to add.

apiVersion: machine.openshift.io/v1beta1
kind: MachineSet
metadata:
  labels:
    machine.openshift.io/cluster-api-cluster: <infrastructureID> 1
  name: <infrastructureID>-<role>-<zone> 2
  namespace: openshift-machine-api
spec:
  replicas: 1
  selector:
    matchLabels:
      machine.openshift.io/cluster-api-cluster: <infrastructureID> 3
      machine.openshift.io/cluster-api-machineset: <infrastructureID>-<role>-<zone> 4
  template:
    metadata:
      labels:
        machine.openshift.io/cluster-api-cluster: <infrastructureID> 5
        machine.openshift.io/cluster-api-machine-role: <role> 6
        machine.openshift.io/cluster-api-machine-type: <role> 7
        machine.openshift.io/cluster-api-machineset: <infrastructureID>-<role>-<zone> 8
    spec:
      metadata:
        labels:
          node-role.kubernetes.io/<role>: "" 9
      providerSpec:
        value:
          ami:
            id: ami-046fe691f52a953f9 10
          apiVersion: awsproviderconfig.openshift.io/v1beta1
          blockDevices:
            - ebs:
                iops: 0
                volumeSize: 120
                volumeType: gp2
          credentialsSecret:
            name: aws-cloud-credentials
          deviceIndex: 0
          iamInstanceProfile:
            id: <infrastructureID>-worker-profile 11
          instanceType: m4.large
          kind: AWSMachineProviderConfig
          placement:
            availabilityZone: us-east-1a
            region: us-east-1
          securityGroups:
            - filters:
                - name: tag:Name
                  values:
                    - <infrastructureID>-worker-sg 12
          subnet:
            filters:
              - name: tag:Name
                values:
                  - <infrastructureID>-private-us-east-1a 13
          tags:
            - name: kubernetes.io/cluster/<infrastructureID> 14
              value: owned
          userDataSecret:
            name: worker-user-data

1 3 5 11 12 13 14

Specify the infrastructure ID that is based on the cluster ID that you set when you provisioned the cluster. If you have the OpenShift CLI installed, you can obtain the infrastructure ID by running the following command:

$ oc get -o jsonpath='{.status.infrastructureName}{"\n"}' infrastructure cluster

2 4 8

Specify the infrastructure ID, node label, and zone.

6 7 9

Specify the node label to add.

10

Specify a valid Red Hat Enterprise Linux CoreOS (RHCOS) AMI for your AWS zone for your OpenShift Container Platform nodes.

Machine sets running on AWS support non-guaranteed Spot Instances. You can save on costs by using Spot Instances at a lower price compared to On-Demand Instances on AWS. Configure Spot Instances by adding spotMarketOptions to the machine set YAML file.

6.2.1.2. Sample YAML for a machine set custom resource on Azure

This sample YAML defines a machine set that runs in the 1 Microsoft Azure zone in the centralus region and creates nodes that are labeled with node-role.kubernetes.io/<role>: ""

In this sample, <infrastructureID> is the infrastructure ID label that is based on the cluster ID that you set when you provisioned the cluster, and <role> is the node label to add.

apiVersion: machine.openshift.io/v1beta1
kind: MachineSet
metadata:
  labels:
    machine.openshift.io/cluster-api-cluster: <infrastructureID> 1
    machine.openshift.io/cluster-api-machine-role: <role> 2
    machine.openshift.io/cluster-api-machine-type: <role> 3
  name: <infrastructureID>-<role>-<region> 4
  namespace: openshift-machine-api
spec:
  replicas: 1
  selector:
    matchLabels:
      machine.openshift.io/cluster-api-cluster: <infrastructureID> 5
      machine.openshift.io/cluster-api-machineset: <infrastructureID>-<role>-<region> 6
  template:
    metadata:
      creationTimestamp: null
      labels:
        machine.openshift.io/cluster-api-cluster: <infrastructureID> 7
        machine.openshift.io/cluster-api-machine-role: <role> 8
        machine.openshift.io/cluster-api-machine-type: <role> 9
        machine.openshift.io/cluster-api-machineset: <infrastructureID>-<role>-<region> 10
    spec:
      metadata:
        creationTimestamp: null
        labels:
          node-role.kubernetes.io/<role>: "" 11
      providerSpec:
        value:
          apiVersion: azureproviderconfig.openshift.io/v1beta1
          credentialsSecret:
            name: azure-cloud-credentials
            namespace: openshift-machine-api
          image:
            offer: ""
            publisher: ""
            resourceID: /resourceGroups/<infrastructureID>-rg/providers/Microsoft.Compute/images/<infrastructureID>
            sku: ""
            version: ""
          internalLoadBalancer: ""
          kind: AzureMachineProviderSpec
          location: centralus
          managedIdentity: <infrastructureID>-identity 12
          metadata:
            creationTimestamp: null
          natRule: null
          networkResourceGroup: ""
          osDisk:
            diskSizeGB: 128
            managedDisk:
              storageAccountType: Premium_LRS
            osType: Linux
          publicIP: false
          publicLoadBalancer: ""
          resourceGroup: <infrastructureID>-rg 13
          sshPrivateKey: ""
          sshPublicKey: ""
          subnet: <infrastructureID>-<role>-subnet 14 15
          userDataSecret:
            name: <role>-user-data 16
          vmSize: Standard_D2s_v3
          vnet: <infrastructureID>-vnet 17
          zone: "1" 18

1 5 7 12 13 14 17

$ oc get -o jsonpath='{.status.infrastructureName}{"\n"}' infrastructure cluster

2 3 8 9 11 15 16

Specify the node label to add.

4 6 10

Specify the infrastructure ID, node label, and region.

18

Specify the zone within your region to place Machines on. Be sure that your region supports the zone that you specify.

6.2.1.3. Sample YAML for a machine set custom resource on GCP

This sample YAML defines a machine set that runs in Google Cloud Platform (GCP) and creates nodes that are labeled with node-role.kubernetes.io/<role>: ""

In this sample, <infrastructureID> is the infrastructure ID label that is based on the cluster ID that you set when you provisioned the cluster, and <role> is the node label to add.

apiVersion: machine.openshift.io/v1beta1
kind: MachineSet
metadata:
  labels:
    machine.openshift.io/cluster-api-cluster: <infrastructureID> 1
  name: <infrastructureID>-w-a 2
  namespace: openshift-machine-api
spec:
  replicas: 1
  selector:
    matchLabels:
      machine.openshift.io/cluster-api-cluster: <infrastructureID> 3
      machine.openshift.io/cluster-api-machineset: <infrastructureID>-w-a 4
  template:
    metadata:
      creationTimestamp: null
      labels:
        machine.openshift.io/cluster-api-cluster: <infrastructureID> 5
        machine.openshift.io/cluster-api-machine-role: <role> 6
        machine.openshift.io/cluster-api-machine-type: <role> 7
        machine.openshift.io/cluster-api-machineset: <infrastructureID>-w-a 8
    spec:
      metadata:
        labels:
          node-role.kubernetes.io/<role>: "" 9
      providerSpec:
        value:
          apiVersion: gcpprovider.openshift.io/v1beta1
          canIPForward: false
          credentialsSecret:
            name: gcp-cloud-credentials
          deletionProtection: false
          disks:
          - autoDelete: true
            boot: true
            image: <path_to_image> 10
            labels: null
            sizeGb: 128
            type: pd-ssd
          kind: GCPMachineProviderSpec
          machineType: n1-standard-4
          metadata:
            creationTimestamp: null
          networkInterfaces:
          - network: <infrastructureID>-network 11
            subnetwork: <infrastructureID>-<role>-subnet 12
          projectID: <project_name> 13
          region: us-central1
          serviceAccounts:
          - email: <infrastructureID>-w@<project_name>.iam.gserviceaccount.com 14 15
            scopes:
            - https://www.googleapis.com/auth/cloud-platform
          tags:
          - <infrastructureID>-<role> 16
          userDataSecret:
            name: worker-user-data
          zone: us-central1-a

1 2 3 4 5 8 11 14

$ oc get -o jsonpath='{.status.infrastructureName}{"\n"}' infrastructure cluster

12 16

Specify the infrastructure ID and node label.

6 7 9

Specify the node label to add.

13 15

Specify the name of the GCP project that you use for your cluster.

10

Specify the path to the image that is used in current machine sets. If you have the OpenShift CLI installed, you can obtain the path to the image by running the following command:

$ oc -n openshift-machine-api \
    -o jsonpath='{.spec.template.spec.providerSpec.value.disks[0].image}{"\n"}' \
    get machineset/<infrastructureID>-worker-a

6.2.1.4. Sample YAML for a machine set custom resource on RHOSP

This sample YAML defines a machine set that runs on Red Hat OpenStack Platform (RHOSP) and creates nodes that are labeled with node-role.openshift.io/<node_role>: ""

In this sample, infrastructure_ID is the infrastructure ID label that is based on the cluster ID that you set when you provisioned the cluster, and node_role is the node label to add.

apiVersion: machine.openshift.io/v1beta1
kind: MachineSet
metadata:
  labels:
    machine.openshift.io/cluster-api-cluster: <infrastructure_ID> 1
    machine.openshift.io/cluster-api-machine-role: <node_role> 2
    machine.openshift.io/cluster-api-machine-type: <node_role> 3
  name: <infrastructure_ID>-<node_role> 4
  namespace: openshift-machine-api
spec:
  replicas: <number_of_replicas>
  selector:
    matchLabels:
      machine.openshift.io/cluster-api-cluster: <infrastructure_ID> 5
      machine.openshift.io/cluster-api-machineset: <infrastructure_ID>-<node_role> 6
  template:
    metadata:
      labels:
        machine.openshift.io/cluster-api-cluster: <infrastructure_ID> 7
        machine.openshift.io/cluster-api-machine-role: <node_role> 8
        machine.openshift.io/cluster-api-machine-type: <node_role> 9
        machine.openshift.io/cluster-api-machineset: <infrastructure_ID>-<node_role> 10
    spec:
      providerSpec:
        value:
          apiVersion: openstackproviderconfig.openshift.io/v1alpha1
          cloudName: openstack
          cloudsSecret:
            name: openstack-cloud-credentials
            namespace: openshift-machine-api
          flavor: <nova_flavor>
          image: <glance_image_name_or_location>
          serverGroupID: <optional_UUID_of_server_group> 11
          kind: OpenstackProviderSpec
          networks:
          - filter: {}
            subnets:
            - filter:
                name: <subnet_name>
                tags: openshiftClusterID=<infrastructure_ID>
          securityGroups:
          - filter: {}
            name: <infrastructure_ID>-<node_role>
          serverMetadata:
            Name: <infrastructure_ID>-<node_role>
            openshiftClusterID: <infrastructure_ID>
          tags:
          - openshiftClusterID=<infrastructure_ID>
          trunk: true
          userDataSecret:
            name: <node_role>-user-data 12

1 5 7

$ oc get -o jsonpath='{.status.infrastructureName}{"\n"}' infrastructure cluster

2 3 8 9 12

Specify the node label to add.

4 6 10

Specify the infrastructure ID and node label.

11

To set a server group policy for the machine set, enter the value that is returned from creating a server group. For most deployments, anti-affinity or soft-anti-affinity policies are recommended.

6.2.1.5. Sample YAML for a machine set custom resource on vSphere

This sample YAML defines a machine set that runs on VMware vSphere and creates nodes that are labeled with node-role.kubernetes.io/<role>: "".

In this sample, <infrastructure_id> is the infrastructure ID label that is based on the cluster ID that you set when you provisioned the cluster, and <role> is the node label to add.

apiVersion: machine.openshift.io/v1beta1
kind: MachineSet
metadata:
  creationTimestamp: null
  labels:
    machine.openshift.io/cluster-api-cluster: <infrastructure_id> 1
  name: <infrastructure_id>-<role> 2
  namespace: openshift-machine-api
spec:
  replicas: 1
  selector:
    matchLabels:
      machine.openshift.io/cluster-api-cluster: <infrastructure_id> 3
      machine.openshift.io/cluster-api-machineset: <infrastructure_id>-<role> 4
  template:
    metadata:
      creationTimestamp: null
      labels:
        machine.openshift.io/cluster-api-cluster: <infrastructure_id> 5
        machine.openshift.io/cluster-api-machine-role: <role> 6
        machine.openshift.io/cluster-api-machine-type: <role> 7
        machine.openshift.io/cluster-api-machineset: <infrastructure_id>-<role> 8
    spec:
      metadata:
        creationTimestamp: null
        labels:
          node-role.kubernetes.io/<role>: "" 9
      providerSpec:
        value:
          apiVersion: vsphereprovider.openshift.io/v1beta1
          credentialsSecret:
            name: vsphere-cloud-credentials
          diskGiB: 120
          kind: VSphereMachineProviderSpec
          memoryMiB: 8192
          metadata:
            creationTimestamp: null
          network:
            devices:
            - networkName: "<vm_network_name>" 10
          numCPUs: 4
          numCoresPerSocket: 1
          snapshot: ""
          template: <vm_template_name> 11
          userDataSecret:
            name: worker-user-data
          workspace:
            datacenter: <vcenter_datacenter_name> 12
            datastore: <vcenter_datastore_name> 13
            folder: <vcenter_vm_folder_path> 14
            resourcepool: <vsphere_resource_pool> 15
            server: <vcenter_server_ip> 16

1 3 5

Specify the infrastructure ID that is based on the cluster ID that you set when you provisioned the cluster. If you have the OpenShift CLI (oc) installed, you can obtain the infrastructure ID by running the following command:

$ oc get -o jsonpath='{.status.infrastructureName}{"\n"}' infrastructure cluster

2 4 8

Specify the infrastructure ID and node label.

6 7 9

Specify the node label to add.

10

Specify the vSphere VM network to deploy the machine set to.

11

Specify the vSphere VM clone of the template to use, such as user-5ddjd-rhcos.

重要

Do not specify the original VM template. The VM template must remain off and must be cloned for new RHCOS machines. Starting the VM template configures the VM template as a VM on the platform, which prevents it from being used as a template that machine sets can apply configurations to.

12

Specify the vCenter Datacenter to deploy the machine set on.

13

Specify the vCenter Datastore to deploy the machine set on.

14

Specify the path to the vSphere VM folder in vCenter, such as /dc1/vm/user-inst-5ddjd.

15

Specify the vSphere resource pool for your VMs.

16

Specify the vCenter server IP or fully qualified domain name.

6.2.2. Creating a machine set

In addition to the ones created by the installation program, you can create your own machine sets to dynamically manage the machine compute resources for specific workloads of your choice.

Prerequisites

Deploy an OpenShift Container Platform cluster.
Install the OpenShift CLI (oc).
Log in to oc as a user with cluster-admin permission.

Procedure

Create a new YAML file that contains the machine set custom resource (CR) sample, as shown, and is named <file_name>.yaml.

Ensure that you set the <clusterID> and <role> parameter values.

If you are not sure about which value to set for a specific field, you can check an existing machine set from your cluster.

$ oc get machinesets -n openshift-machine-api

Example output

NAME                                DESIRED   CURRENT   READY   AVAILABLE   AGE
agl030519-vplxk-worker-us-east-1a   1         1         1       1           55m
agl030519-vplxk-worker-us-east-1b   1         1         1       1           55m
agl030519-vplxk-worker-us-east-1c   1         1         1       1           55m
agl030519-vplxk-worker-us-east-1d   0         0                             55m
agl030519-vplxk-worker-us-east-1e   0         0                             55m
agl030519-vplxk-worker-us-east-1f   0         0                             55m

Check values of a specific machine set:

$ oc get machineset <machineset_name> -n \
     openshift-machine-api -o yaml

Example output

...
template:
    metadata:
      labels:
        machine.openshift.io/cluster-api-cluster: agl030519-vplxk 1
        machine.openshift.io/cluster-api-machine-role: worker 2
        machine.openshift.io/cluster-api-machine-type: worker
        machine.openshift.io/cluster-api-machineset: agl030519-vplxk-worker-us-east-1a

1: The cluster ID.
2: A default node label.

Create the new MachineSet CR:
```
$ oc create -f <file_name>.yaml
```

View the list of machine sets:

$ oc get machineset -n openshift-machine-api

Example output

NAME                                DESIRED   CURRENT   READY   AVAILABLE   AGE
agl030519-vplxk-infra-us-east-1a    1         1         1       1           11m
agl030519-vplxk-worker-us-east-1a   1         1         1       1           55m
agl030519-vplxk-worker-us-east-1b   1         1         1       1           55m
agl030519-vplxk-worker-us-east-1c   1         1         1       1           55m
agl030519-vplxk-worker-us-east-1d   0         0                             55m
agl030519-vplxk-worker-us-east-1e   0         0                             55m
agl030519-vplxk-worker-us-east-1f   0         0                             55m

When the new machine set is available, the DESIRED and CURRENT values match. If the machine set is not available, wait a few minutes and run the command again.

After the new machine set is available, check status of the machine and the node that it references:

$ oc describe machine <name> -n openshift-machine-api

For example:

$ oc describe machine agl030519-vplxk-infra-us-east-1a -n openshift-machine-api

Example output

status:
  addresses:
  - address: 10.0.133.18
    type: InternalIP
  - address: ""
    type: ExternalDNS
  - address: ip-10-0-133-18.ec2.internal
    type: InternalDNS
  lastUpdated: "2019-05-03T10:38:17Z"
  nodeRef:
    kind: Node
    name: ip-10-0-133-18.ec2.internal
    uid: 71fb8d75-6d8f-11e9-9ff3-0e3f103c7cd8
  providerStatus:
    apiVersion: awsproviderconfig.openshift.io/v1beta1
    conditions:
    - lastProbeTime: "2019-05-03T10:34:31Z"
      lastTransitionTime: "2019-05-03T10:34:31Z"
      message: machine successfully created
      reason: MachineCreationSucceeded
      status: "True"
      type: MachineCreation
    instanceId: i-09ca0701454124294
    instanceState: running
    kind: AWSMachineProviderStatus

View the new node and confirm that the new node has the label that you specified:
```
$ oc get node <node_name> --show-labels
```
Review the command output and confirm that node-role.kubernetes.io/<your_label> is in the LABELS list.

注意

Any change to a machine set is not applied to existing machines owned by the machine set. For example, labels edited or added to an existing machine set are not propagated to existing machines and nodes associated with the machine set.

6.2. Creating infrastructure machine sets for production environments

6.2.1. Creating machine sets for different clouds

6.2.1.1. Sample YAML for a machine set custom resource on AWS

6.2.1.2. Sample YAML for a machine set custom resource on Azure

6.2.1.3. Sample YAML for a machine set custom resource on GCP

6.2.1.4. Sample YAML for a machine set custom resource on RHOSP

6.2.1.5. Sample YAML for a machine set custom resource on vSphere

6.2.2. Creating a machine set

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