Red Hat Summit2.3. Creating a compute machine set on Azure Stack Hub
You can create a different compute machine set to serve a specific purpose in your OpenShift Container Platform cluster on Microsoft Azure Stack Hub. For example, you might create infrastructure machine sets and related machines so that you can move supporting workloads to the new machines.
You can use the advanced machine management and scaling capabilities only in clusters where the Machine API is operational. Clusters with user-provisioned infrastructure require additional validation and configuration to use the Machine API.
Clusters with the infrastructure platform type none cannot use the Machine API. This limitation applies even if the compute machines that are attached to the cluster are installed on a platform that supports the feature. This parameter cannot be changed after installation.
To view the platform type for your cluster, run the following command:
$ oc get infrastructure cluster -o jsonpath='{.status.platform}'2.3.1. Sample YAML for a compute machine set custom resource on Azure Stack Hub
You can create a machine set on Microsoft Azure Stack Hub. By defining a YAML configuration with specific cluster IDs and provider details, you can automate the provisioning of specialized nodes.
The Microsoft Azure sample YAML defines a compute machine set that runs in the 1 Azure zone in a region and creates nodes that are labeled with node-role.kubernetes.io/<role>: "".
In the 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:
labels:
machine.openshift.io/cluster-api-cluster: <infrastructure_id>
machine.openshift.io/cluster-api-machine-role: <role>
machine.openshift.io/cluster-api-machine-type: <role>
name: <infrastructure_id>-<role>-<region>
namespace: openshift-machine-api
spec:
replicas: 1
selector:
matchLabels:
machine.openshift.io/cluster-api-cluster: <infrastructure_id>
machine.openshift.io/cluster-api-machineset: <infrastructure_id>-<role>-<region>
template:
metadata:
creationTimestamp: null
labels:
machine.openshift.io/cluster-api-cluster: <infrastructure_id>
machine.openshift.io/cluster-api-machine-role: <role>
machine.openshift.io/cluster-api-machine-type: <role>
machine.openshift.io/cluster-api-machineset: <infrastructure_id>-<role>-<region>
spec:
metadata:
creationTimestamp: null
labels:
node-role.kubernetes.io/<role>: ""
providerSpec:
value:
apiVersion: machine.openshift.io/v1beta1
availabilitySet: <availability_set>
credentialsSecret:
name: azure-cloud-credentials
namespace: openshift-machine-api
image:
offer: ""
publisher: ""
resourceID: /resourceGroups/<infrastructure_id>-rg/providers/Microsoft.Compute/images/<infrastructure_id>
sku: ""
version: ""
internalLoadBalancer: ""
kind: AzureMachineProviderSpec
location: <region>
managedIdentity: <infrastructure_id>-identity
metadata:
creationTimestamp: null
natRule: null
networkResourceGroup: ""
osDisk:
diskSizeGB: 128
managedDisk:
storageAccountType: Premium_LRS
osType: Linux
publicIP: false
publicLoadBalancer: ""
resourceGroup: <infrastructure_id>-rg
sshPrivateKey: ""
sshPublicKey: ""
subnet: <infrastructure_id>-<role>-subnet
userDataSecret:
name: worker-user-data
vmSize: Standard_DS4_v2
vnet: <infrastructure_id>-vnet
zone: "1"where:
<infrastructure_id>Specifies the infrastructure ID that is based on the cluster ID that you set when you provisioned the cluster. If you have the OpenShift Container Platform CLI installed, you can obtain the infrastructure ID by running the following command:
$ oc get -o jsonpath='{.status.infrastructureName}{"\n"}' infrastructure clusterYou can obtain the subnet by running the following command:
$ oc -n openshift-machine-api \ -o jsonpath='{.spec.template.spec.providerSpec.value.subnet}{"\n"}' \ get machineset/<infrastructure_id>-worker-centralus1You can obtain the vnet by running the following command:
$ oc -n openshift-machine-api \ -o jsonpath='{.spec.template.spec.providerSpec.value.vnet}{"\n"}' \ get machineset/<infrastructure_id>-worker-centralus1<role>- Specifies the node label to add.
<infrastructure_id>-<role>-<region>- Specifies the infrastructure ID, node label, and region.
<region>Specifies the region to place machines on.
참고The
spec.template.spec.providerSpec.value.zonespecifies the zone within your region to place machines on. Be sure that your region supports the zone that you specify.<availability_set>- Specifies the availability set for the cluster.
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