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Merge pull request #61853 from jeana-redhat/OCPBUGS-15211-deleting-autoscaler-resources
[OCPBUGS-15211]: Steps to disable autoscalers
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‎machine_management/applying-autoscaling.adoc

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[IMPORTANT]
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====
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You can configure the cluster autoscaler only in clusters where the machine API is operational.
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You can configure the cluster autoscaler only in clusters where the Machine API Operator is operational.
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====
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include::modules/cluster-autoscaler-about.adoc[leveloffset=+1]
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[id="configuring-clusterautoscaler"]
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[id="configuring-clusterautoscaler_{context}"]
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== Configuring the cluster autoscaler
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First, deploy the cluster autoscaler to manage automatic resource scaling in your {product-title} cluster.
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:FeatureName: cluster autoscaler
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:FeatureResourceName: ClusterAutoscaler
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include::modules/deploying-resource.adoc[leveloffset=+2]
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== Next steps
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* After you configure the cluster autoscaler, you must configure at least one machine autoscaler.
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.Next steps
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* After you configure the cluster autoscaler, you must xref:../machine_management/applying-autoscaling.adoc#configuring-machineautoscaler_applying-autoscaling[configure at least one machine autoscaler].
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include::modules/machine-autoscaler-about.adoc[leveloffset=+1]
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[id="configuring-machineautoscaler"]
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== Configuring the machine autoscalers
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[id="configuring-machineautoscaler_{context}"]
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== Configuring machine autoscalers
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After you deploy the cluster autoscaler, deploy `MachineAutoscaler` resources that reference the compute machine sets that are used to scale the cluster.
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:FeatureResourceName: MachineAutoscaler
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include::modules/deploying-resource.adoc[leveloffset=+2]
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[id="disabling-autoscaling_{context}"]
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== Disabling autoscaling
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You can disable an individual machine autoscaler in your cluster or disable autoscaling on the cluster entirely.
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include::modules/deleting-machine-autoscaler.adoc[leveloffset=+2]
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[role="_additional-resources"]
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.Additional resources
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* xref:../machine_management/applying-autoscaling.adoc#deleting-cluster-autoscaler_applying-autoscaling[Disabling the cluster autoscaler]
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* xref:../machine_management/applying-autoscaling.adoc#MachineAutoscaler-deploying_applying-autoscaling[Deploying a machine autoscaler]
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include::modules/deleting-cluster-autoscaler.adoc[leveloffset=+2]
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[role="_additional-resources"]
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.Additional resources
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* xref:../machine_management/applying-autoscaling.adoc#deleting-machine-autoscaler_applying-autoscaling[Disabling the machine autoscaler]
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* xref:../machine_management/applying-autoscaling.adoc#ClusterAutoscaler-deploying_applying-autoscaling[Deploying a cluster autoscaler]
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[role="_additional-resources"]
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== Additional resources
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* For more information about pod priority, see xref:../nodes/pods/nodes-pods-priority.adoc#nodes-pods-priority[Including pod priority in pod scheduling decisions in {product-title}].
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* xref:../nodes/pods/nodes-pods-priority.adoc#nodes-pods-priority[Including pod priority in pod scheduling decisions in {product-title}]

‎modules/cluster-autoscaler-cr.adoc

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:_content-type: REFERENCE
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[id="cluster-autoscaler-cr_{context}"]
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= ClusterAutoscaler resource definition
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= Cluster autoscaler resource definition
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This `ClusterAutoscaler` resource definition shows the parameters and sample values for the cluster autoscaler.
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‎modules/deleting-cluster-autoscaler.adoc

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// Module included in the following assemblies:
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//
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// * machine_management/applying-autoscaling.adoc
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:_content-type: PROCEDURE
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[id="deleting-cluster-autoscaler_{context}"]
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= Disabling the cluster autoscaler
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To disable the cluster autoscaler, you delete the corresponding `ClusterAutoscaler` resource.
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[NOTE]
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====
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Disabling the cluster autoscaler disables autoscaling on the cluster, even if the cluster has existing machine autoscalers.
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====
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.Procedure
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. List the `ClusterAutoscaler` resource for the cluster by running the following command:
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[source,terminal]
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----
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$ oc get ClusterAutoscaler
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----
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.Example output
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[source,terminal]
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----
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NAME AGE
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default 42m
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----
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. Optional: Create a YAML file backup of the `ClusterAutoscaler` CR by running the following command:
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[source,terminal]
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----
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$ oc get ClusterAutoscaler/default \//<1>
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-o yaml> <cluster_autoscaler_backup_name>.yaml //<2>
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----
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<1> `default` is the name of the `ClusterAutoscaler` CR.
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<2> `<cluster_autoscaler_backup_name>` is the name for the backup of the CR.
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. Delete the `ClusterAutoscaler` CR by running the following command:
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[source,terminal]
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----
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$ oc delete ClusterAutoscaler/default
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----
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.Example output
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[source,terminal]
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----
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clusterautoscaler.autoscaling.openshift.io "default" deleted
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----
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.Verification
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* To verify that the cluster autoscaler is disabled, run the following command:
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[source,terminal]
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$ oc get ClusterAutoscaler
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----
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.Expected output
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[source,terminal]
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----
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No resources found
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----
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.Next steps
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* Disabling the cluster autoscaler by deleting the `ClusterAutoscaler` CR prevents the cluster from autoscaling but does not delete any existing machine autoscalers on the cluster. To clean up unneeded machine autoscalers, see "Disabling a machine autoscaler".
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* If you need to re-enable the cluster autoscaler, use the `<cluster_autoscaler_name_backup>.yaml` backup file and follow the instructions in "Deploying a cluster autoscaler".

‎modules/deleting-machine-autoscaler.adoc

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// Module included in the following assemblies:
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//
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// * machine_management/applying-autoscaling.adoc
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:_content-type: PROCEDURE
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[id="deleting-machine-autoscaler_{context}"]
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= Disabling a machine autoscaler
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To disable a machine autoscaler, you delete the corresponding `MachineAutoscaler` custom resource (CR).
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[NOTE]
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====
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Disabling a machine autoscaler does not disable the cluster autoscaler. To disable the cluster autoscaler, follow the instructions in "Disabling the cluster autoscaler".
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====
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.Procedure
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. List the `MachineAutoscaler` CRs for the cluster by running the following command:
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[source,terminal]
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$ oc get MachineAutoscaler -n openshift-machine-api
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----
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.Example output
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[source,terminal]
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----
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NAME REF KIND REF NAME MIN MAX AGE
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compute-us-east-1a MachineSet compute-us-east-1a 1 12 39m
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compute-us-west-1a MachineSet compute-us-west-1a 2 4 37m
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----
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. Optional: Create a YAML file backup of the `MachineAutoscaler` CR by running the following command:
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[source,terminal]
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----
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$ oc get MachineAutoscaler/<machine_autoscaler_name> \//<1>
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-n openshift-machine-api \
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-o yaml> <machine_autoscaler_name_backup>.yaml //<2>
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----
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<1> `<machine_autoscaler_name>` is the name of the CR that you want to delete.
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<2> `<machine_autoscaler_name_backup>` is the name for the backup of the CR.
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. Delete the `MachineAutoscaler` CR by running the following command:
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[source,terminal]
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$ oc delete MachineAutoscaler/<machine_autoscaler_name> -n openshift-machine-api
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----
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.Example output
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[source,terminal]
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machineautoscaler.autoscaling.openshift.io "compute-us-east-1a" deleted
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----
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.Verification
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* To verify that the machine autoscaler is disabled, run the following command:
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[source,terminal]
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$ oc get MachineAutoscaler -n openshift-machine-api
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----
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The disabled machine autoscaler does not appear in the list of machine autoscalers.
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.Next steps
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* If you need to re-enable the machine autoscaler, use the `<machine_autoscaler_name_backup>.yaml` backup file and follow the instructions in "Deploying a machine autoscaler".

‎modules/deploying-resource.adoc

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:_content-type: PROCEDURE
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[id="{FeatureResourceName}-deploying_{context}"]
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= Deploying the {FeatureName}
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= Deploying a {FeatureName}
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To deploy the {FeatureName}, you create an instance of the `{FeatureResourceName}` resource.
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To deploy a {FeatureName}, you create an instance of the `{FeatureResourceName}` resource.
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.Procedure
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. Create a YAML file for the `{FeatureResourceName}` resource that contains the customized resource definition.
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. Create a YAML file for a `{FeatureResourceName}` resource that contains the custom resource definition.
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. Create the resource in the cluster:
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. Create the custom resource in the cluster by running the following command:
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[source,terminal]
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$ oc create -f <filename>.yaml <1>
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<1> `<filename>` is the name of the resource file that you customized.
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<1> `<filename>` is the name of the custom resource file.
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// Undefine attributes, so that any mistakes are easily spotted
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:!FeatureName:

‎modules/machine-autoscaler-cr.adoc

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:_content-type: REFERENCE
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[id="machine-autoscaler-cr_{context}"]
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= MachineAutoscaler resource definition
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= Machine autoscaler resource definition
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This `MachineAutoscaler` resource definition shows the parameters and sample values for the machine autoscaler.
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