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TELCODOCS-28: New status items, drainProgress and elapsedTime, added
TELCODOCS-28: Status items updated / Setting a node to maintenance mode in the web console using the Actions control added TELCODOCS-28: SME feedback applied TELCODOCS-28: Added new module 'Resuming a node from maintenance mode in the web console using the Actions control' TELCODOCS-28: Applied SME / QE feedback TELCODOCS-28: Applied 2nd round of edits from SME / QE feedback TELCODOCS-28: Applied 3rd round of edits from SME / QE feedback TELCODOCS-28: Peer review feedback applied TELCODOCS-28: Applied 4th round of edits from SME / QE feedback TELCODOCS-28: Applied 5th round of edits from SME / QE feedback TELCODOCS-28: Resolve merge conflict in NMO assembly TELCODOCS-28: Applied 6th round of edits from SME feedback TELCODOCS-28: Applied 2nd round of edits from peer review TELCODOCS-28: Applied 3rd round of edits from peer review
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‎modules/eco-about-node-maintenance-standalone.adoc‎

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[id="eco-about-node-maintenance-operator_{context}"]
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= About the Node Maintenance Operator
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You can place nodes into maintenance mode using the `oc adm` utility, or using `NodeMaintenance` custom resources (CRs).
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The Node Maintenance Operator watches for new or deleted `NodeMaintenance` CRs. When a new `NodeMaintenance` CR is detected, no new workloads are scheduled and the node is cordoned off from the rest of the cluster. All pods that can be evicted are evicted from the node. When a `NodeMaintenance` CR is deleted, the node that is referenced in the CR is made available for new workloads.
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[NOTE]

‎modules/eco-checking_status_of_node_maintenance_cr_tasks.adoc‎

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nodeName: node-1.example.com
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reason: Node maintenance
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status:
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evictionPods: 3 <1>
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lastError: "Last failure message" <2>
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drainProgress: 100 <1>
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evictionPods: 3 <2>
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lastError: "Last failure message" <3>
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lastUpdate: "2022-06-23T11:43:18Z" <4>
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phase: Succeeded
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totalpods: 5 <3>
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totalpods: 5 <5>
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...
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----
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<1> The number of pods scheduled for eviction.
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<2> The latest eviction error, if any.
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<3> The total number of pods before the node entered maintenance mode.
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<1> The percentage completion of draining the node.
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<2> The number of pods scheduled for eviction.
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<3> The latest eviction error, if any.
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<4> The last time the status was updated.
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<5> The total number of pods before the node entered maintenance mode.

‎modules/eco-node-maintenance-operator-installation-web-console.adoc‎

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If the Operator is not installed successfully:
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. Navigate to the *Operators* -> *Installed Operators* page and inspect the `Status` column for any errors or failures.
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. Navigate to the *Workloads* -> *Pods* page and check the logs in any pods in the `openshift-operators` project that are reporting issues.
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. Navigate to the *Operators* -> *Installed Operators* -> *Node Maintenance Operator* -> *Details* page, and inspect the `Conditions` section for errors before pod creation.
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. Navigate to the *Workloads* -> *Pods* page, search for the `Node Maintenance Operator` pod in the installed namespace, and check the logs in the `Logs` tab.

‎modules/eco-resuming-node-maintenance-actions-web-console.adoc‎

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// Module included in the following assemblies:
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//
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//nodes/nodes/eco-node-maintenance-operator.adoc
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:_content-type: PROCEDURE
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[id="eco-resuming-node-maintenance-actions-web-console_{context}"]
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= Resuming a bare-metal node from maintenance mode
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Resume a bare-metal node from maintenance mode using the Options menu {kebab} found on each node in the *Compute* -> *Nodes* list, or using the *Actions* control of the *Node Details* screen.
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.Procedure
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. From the *Administrator* perspective of the web console, click *Compute* -> *Nodes*.
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. You can resume the node from this screen, which makes it easier to perform actions on multiple nodes, or from the *Node Details* screen, where you can view comprehensive details of the selected node:
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** Click the Options menu {kebab} at the end of the node and select
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*Stop Maintenance*.
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** Click the node name to open the *Node Details* screen and click
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*Actions* -> *Stop Maintenance*.
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. Click *Stop Maintenance* in the confirmation window.
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The node becomes schedulable. If it had virtual machine instances that were running on the node prior to maintenance, then they will not automatically migrate back to this node.
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.Verification
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* Navigate to the *Compute* -> *Nodes* page and verify that the corresponding node has a status of `Ready`.

‎modules/eco-resuming-node-maintenance-cr-cli.adoc‎

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----
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nodemaintenance.nodemaintenance.medik8s.io "maintenance-example" deleted
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----
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.Verification
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. Check the progress of the maintenance task by running the following command:
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[source,terminal]
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----
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$ oc describe node <node-name>
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----
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where `<node-name>` is the name of your node; for example, `node-1.example.com`
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. Check the example output:
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[source,terminal]
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----
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Events:
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Type Reason Age From Message
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---- ------ ---- ---- -------
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Normal NodeSchedulable 2m kubelet Node node-1.example.com status is now: NodeSchedulable
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----

‎modules/eco-resuming-node-maintenance-cr-web-console.adoc‎

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= Resuming a node from maintenance mode by using the web console
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To resume a node from maintenance mode, you can delete a `NodeMaintenance` custom resource (CR) by using the web console.
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.Prerequisites
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* Log in as a user with `cluster-admin` privileges.
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. In the {product-title} console, click *Compute → Nodes*.
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. Inspect the `Status` column of the node for which you deleted the `NodeMaintenance` CR and verify that its status is `Ready`.
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. Inspect the `Status` column of the node for which you deleted the `NodeMaintenance` CR and verify that its status is `Ready`.

‎modules/eco-setting-node-maintenance-actions-web-console.adoc‎

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// Module included in the following assemblies:
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//
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//nodes/nodes/eco-node-maintenance-operator.adoc
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:_content-type: PROCEDURE
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[id="eco-setting-node-maintenance-actions-web-console_{context}"]
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= Setting a bare-metal node to maintenance mode
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Set a bare-metal node to maintenance mode using the Options menu {kebab} found on each node in the *Compute* -> *Nodes* list, or using the *Actions* control of the *Node Details* screen.
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.Procedure
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. From the *Administrator* perspective of the web console, click *Compute* -> *Nodes*.
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. You can set the node to maintenance from this screen, which makes it easier to perform actions on multiple nodes, or from the *Node Details* screen, where you can view comprehensive details of the selected node:
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** Click the Options menu {kebab} at the end of the node and select *Start Maintenance*.
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** Click the node name to open the *Node Details* screen and click
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*Actions* -> *Start Maintenance*.
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. Click *Start Maintenance* in the confirmation window.
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The node is no longer schedulable. If it had virtual machines with the `LiveMigration` eviction strategy, then it will live migrate them. All other pods and virtual machines on the node are deleted and recreated on another node.
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.Verification
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* Navigate to the *Compute* -> *Nodes* page and verify that the corresponding node has a status of `Under maintenance`.

‎modules/eco-setting-node-maintenance-cr-cli.adoc‎

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$ oc apply -f nodemaintenance-cr.yaml
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----
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. Check the progress of the maintenance task by running the following command, replacing `<node-name>` with the name of your node; for example, `node-1.example.com`:
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.Verification
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. Check the progress of the maintenance task by running the following command:
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[source,terminal]
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$ oc describe node node-1.example.com
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$ oc describe node <node-name>
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.Example output
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where `<node-name>` is the name of your node; for example, `node-1.example.com`
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. Check the example output:
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[source,terminal]
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----

‎modules/eco-setting-node-maintenance-cr-web-console.adoc‎

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.Verification
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In the *Node Maintenance* tab, inspect the `Status` column and verify that its status is `Succeeded`.
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In the *Node Maintenance* tab, inspect the `Status` column and verify that its status is `Succeeded`.

‎nodes/nodes/eco-node-maintenance-operator.adoc‎

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toc::[]
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You can use the Node Maintenance Operator to place nodes in maintenance mode. This is a standalone version of the Node Maintenance Operator that is independent of {VirtProductName} installation.
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[NOTE]
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====
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If you have installed {VirtProductName}, you must use the Node Maintenance Operator that is bundled with it.
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====
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You can use the Node Maintenance Operator to place nodes in maintenance mode by using the `oc adm` utility or `NodeMaintenance` custom resources (CRs).
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include::modules/eco-maintaining-bare-metal-nodes.adoc[leveloffset=+1]
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[id="installing-standalone-nmo"]
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== Installing the Node Maintenance Operator
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You can install the Node Maintenance Operator using the web console or the OpenShift CLI (`oc`).
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[NOTE]
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====
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If {VirtProductName} version 4.10 or less is installed in your cluster, it includes an outdated version of the Node Maintenance Operator version.
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====
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[id="setting-node-in-maintenance-mode"]
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== Setting a node to maintenance mode
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You can place a node into maintenance from the web console or in the CLI by using a `NodeMaintenance` CR.
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You can place a node into maintenance mode from the web console or from the CLI by using a `NodeMaintenance` CR.
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include::modules/eco-checking_status_of_node_maintenance_cr_tasks.adoc[leveloffset=+2]
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[id="resuming-node-from-maintenance-mode"]
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== Resuming a node from maintenance mode
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You can resume a node from maintenance mode from the CLI or by using a `NodeMaintenance` CR. Resuming a node brings it out of maintenance mode and makes it schedulable again.
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You can resume a node from maintenance mode from the web console or from the CLI by using a `NodeMaintenance` CR. Resuming a node brings it out of maintenance mode and makes it schedulable again.
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[id="working-with-bare-metal-nodes"]
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== Working with bare-metal nodes
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For clusters with bare-metal nodes, you can place a node into maintenance mode, and resume a node from maintenance mode, by using the web console *Actions* control.
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[NOTE]
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====
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Clusters with bare-metal nodes can also place a node into maintenance mode, and resume a node from maintenance mode, by using the web console and CLI, as outlined. These methods, by using the web console *Actions* control, are applicable to bare-metal clusters only.
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====
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include::modules/eco-maintaining-bare-metal-nodes.adoc[leveloffset=+2]
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include::modules/eco-setting-node-maintenance-actions-web-console.adoc[leveloffset=+2]
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[id="gather-data-nmo"]
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== Gathering data about the Node Maintenance Operator
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To collect debugging information about the Node Maintenance Operator, use the `must-gather` tool. For information about the `must-gather` image for the Node Maintenance Operator, see xref:../../support/gathering-cluster-data.adoc#gathering-data-specific-features_gathering-cluster-data[Gathering data about specific features].
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== Additional resources
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* xref:../../support/gathering-cluster-data.adoc#gathering-cluster-data[Gathering data about your cluster]
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* xref:../../nodes/nodes/nodes-nodes-working.adoc#nodes-nodes-working-evacuating_nodes-nodes-working[Understanding how to evacuate pods on nodes]
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* xref:../../nodes/nodes/nodes-nodes-working.adoc#nodes-nodes-working-marking_nodes-nodes-working[Understanding how to mark nodes as unschedulable or schedulable]
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* xref:../../nodes/nodes/nodes-nodes-working.adoc#nodes-nodes-working-marking_nodes-nodes-working[Understanding how to mark nodes as unschedulable or schedulable]

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