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Merge pull request #62651 from aldiazRH/OSDOCS-6133
[OSDOCS-6133] ROSA OSD UI cluster autoscaling
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‎_topic_maps/_topic_map_osd.yml

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Topics:
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- Name: Accessing the service logs
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File: osd-accessing-the-service-logs
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# - Name: Cluster autoscaling
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# File: osd-cluster-autoscaling
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---
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Name: Security and compliance
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Dir: security

‎_topic_maps/_topic_map_rosa.yml

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Distros: openshift-rosa
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- Name: About autoscaling nodes on a cluster
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File: rosa-nodes-about-autoscaling-nodes
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# - Name: Cluster autoscaling
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# File: rosa-cluster-autoscaling
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---
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Name: Security and compliance
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Dir: security

‎modules/rosa-cluster-autoscaler-settings.adoc

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// Module included in the following assemblies:
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//
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// * rosa_cluster_admin/rosa-cluster-autoscaling.adoc
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:_content-type: REFERENCE
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[id="rosa-cluster-autoscale-settings_{context}"]
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= Cluster autoscaling settings using OpenShift Cluster Manager
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The tables explain all the configurable UI settings when using cluster autoscaling with OpenShift Cluster Manager.
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== Balancing behavior
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[cols="4",options="header"]
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|===
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|Setting
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|Description
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|Type or Range
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|Default
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|`balanceSimilarNodeGroups`
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|If `true`, this setting automatically identifies node groups with the same instance type and the same set of labels and tries to keep the respective sizes of those node groups balanced.
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|`boolean`
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|false
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|`logVerbosity`
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|Sets the autoscaler log level. Default value is 1, level 4 is recommended for debugging and level 6 enables almost everything.
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|`integer`
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|1
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|`maxPodGracePeriod`
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|Gives pods graceful termination time before scaling down.
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|`integer`
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|600
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|`skipNodesWithLocalStorage`
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|If `true`, the cluster autoscaler never deletes nodes with pods with local storage, e.g. EmptyDir or HostPath.
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|`boolean`
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|true
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|===
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== Resource limits
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[cols="4",options="header"]
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|===
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|Setting
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|Description
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|Type or Range
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|Default
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|`maxNodesTotal`
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|Maximum number of nodes in all node groups. Includes all nodes, not just automatically scaled nodes. The cluster autoscaler does not grow the cluster beyond this number.
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|`integer`
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|0
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|`cores.min`
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|Minimum number of cores in cluster. The cluster autoscaler does not scale the cluster beyond these numbers.
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|`object`
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|1
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|`cores.max`
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|Maximum number of cores in cluster. The cluster autoscaler does not scale the cluster beyond these numbers.
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|`object`
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|320000
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|`memory.min`
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|Minimum number of gigabytes of memory in cluster. The cluster autoscaler does not scale the cluster beyond these numbers.
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|`object`
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|1
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|`memory.max`
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|Maximum number of gigabytes of memory in cluster. The cluster autoscaler does not scale the cluster beyond these numbers.
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|`object`
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|6400000
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|===
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== Scale down configuration
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[cols="4",options="header"]
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|===
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|Setting
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|Description
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|Type or Range
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|Default
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|`enable`
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|Should the cluster autoscaler scale down the cluster.
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|`boolean`
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|`true`
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|`scaleDown.unneededTime`
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|How long a node should be unneeded before it is eligible for scale down.
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|`string`
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|10m
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|`scaleDown.utilizationThreshold`
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|Node utilization level, defined as sum of requested resources divided by capacity, below which a node can be considered for scale down.
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|`string`
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|0.5
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|`scaleDown.delayAfterAdd`
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|How long after scale up that scale down evaluation resumes.
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|`string`
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|10m
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|`scaleDown.delayAfterDelete`
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|How long after node deletion that scale down evaluation resumes.
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|`string`
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|0s
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|`scaleDown.delayAfterFailure`
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|How long after scale down failure that scale down evaluation resumes.
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|`string`
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|3m
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|===

‎modules/rosa-cluster-autoscaler-ui-after.adoc

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// Module included in the following assemblies:
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//
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// * rosa_cluster_admin/rosa-cluster-autoscaling.adoc
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:_content-type: REFERENCE
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[id="rosa-cluster-autoscale-ui-after_{context}"]
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= Enable autoscaling after cluster creation with OpenShift Cluster Manager
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You can use OpenShift Cluster Manager to autoscale after cluster creation.
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.Procedure
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. In OpenShift Cluster Manager, click the name of the cluster you want to autoscale. The Overview page for the cluster has a *Autoscaling* item that indicates if it is enabled or disabled.
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. Click the *Machine Pools* tab.
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. Click the *Edit cluster autoscaling* button. The *Edit cluster autoscaling* settings window is shown.
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. Check the *Enable cluster autoscaling* box at the top of the window. All the settings are now editable.
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. Edit any settings you want and then click *Save*.
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. Click the x at the top right of the screen to close the settings window.
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To revert all autoscaling settings to the defaults if they have been changed, click the *Revert all to defaults* button.

‎modules/rosa-cluster-autoscaler-ui-during.adoc

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// Module included in the following assemblies:
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//
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// * rosa_cluster_admin/rosa-cluster-autoscaling.adoc
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:_content-type: REFERENCE
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[id="rosa-cluster-autoscale-ui-during_{context}"]
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= Enable autoscaling during cluster creation with OpenShift Cluster Manager
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You can use OpenShift Cluster Manager to autoscale during cluster creation.
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.Procedure
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. During cluster creation, check the *Enable autoscaling* box. The *Edit cluster autoscaling settings* button becomes selectable.
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.. You can also choose the minimum or maximum amount of nodes to autoscale.
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. Click *Edit cluster autoscaling settings*.
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. Edit any settings you want and then click *Close*.

‎osd_cluster_admin/osd-cluster-autoscaling.adoc

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:_content-type: ASSEMBLY
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[id="osd-cluster-autoscaling"]
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= Cluster autoscaling
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include::_attributes/attributes-openshift-dedicated.adoc[]
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:context: osd-cluster-autoscaling
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toc::[]
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Applying autoscaling to {product-title} clusters involves configuring a cluster autoscaler and then configuring a machine autoscaler for at least one machine pool in your cluster.
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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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Only one cluster autoscaler can be created per cluster.
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====
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include::modules/cluster-autoscaler-about.adoc[leveloffset=+1]
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include::modules/rosa-cluster-autoscaler-ui-during.adoc[leveloffset=+1]
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include::modules/rosa-cluster-autoscaler-ui-after.adoc[leveloffset=+1]
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include::modules/rosa-cluster-autoscaler-settings.adoc[leveloffset=+1]

‎rosa_cluster_admin/rosa-cluster-autoscaling.adoc

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:_content-type: ASSEMBLY
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[id="rosa-cluster-autoscaling"]
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= Cluster autoscaling
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include::_attributes/attributes-openshift-dedicated.adoc[]
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:context: rosa-cluster-autoscaling
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toc::[]
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Applying autoscaling to {product-title} clusters involves configuring a cluster autoscaler and then configuring a machine autoscaler for at least one machine pool in your cluster.
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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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Only one cluster autoscaler can be created per cluster.
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====
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include::modules/cluster-autoscaler-about.adoc[leveloffset=+1]
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include::modules/rosa-cluster-autoscaler-ui-during.adoc[leveloffset=+1]
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include::modules/rosa-cluster-autoscaler-ui-after.adoc[leveloffset=+1]
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include::modules/rosa-cluster-autoscaler-settings.adoc[leveloffset=+1]

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