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124 lines
3.7 KiB
Plaintext
124 lines
3.7 KiB
Plaintext
// Module included in the following assemblies:
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//
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// * machine_configuration/machine-config-node-disruption_machine-configs-configure.adoc
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:_mod-docs-content-type: PROCEDURE
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[id="machine-config-node-disruption-config_{context}"]
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= Configuring node restart behaviors upon machine config changes
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You can create a node disruption policy to define the machine configuration changes that cause a disruption to your cluster, and which changes do not.
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You can control how your nodes respond to changes in the files in the `/var` or `/etc` directory, the systemd units, the SSH keys, and the `registries.conf` file.
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include::snippets/machine-config-node-disruption-actions.adoc[]
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.Procedure
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. Edit the `machineconfigurations.operator.openshift.io` object to define the node disruption policy:
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+
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[source,terminal]
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----
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$ oc edit MachineConfiguration cluster -n openshift-machine-config-operator
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----
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. Add a node disruption policy similar to the following:
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+
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[source,yaml]
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----
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apiVersion: operator.openshift.io/v1
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kind: MachineConfiguration
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metadata:
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name: cluster
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# ...
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spec:
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nodeDisruptionPolicy: <1>
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files: # <2>
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- actions: # <3>
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- restart: # <4>
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serviceName: chronyd.service # <5>
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type: Restart
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path: /etc/chrony.conf # <6>
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sshkey: # <7>
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actions:
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- type: Drain
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- reload:
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serviceName: crio.service
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type: Reload
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- type: DaemonReload
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- restart:
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serviceName: crio.service
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type: Restart
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units: # <8>
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- actions:
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- type: Drain
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- reload:
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serviceName: crio.service
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type: Reload
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- type: DaemonReload
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- restart:
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serviceName: crio.service
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type: Restart
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name: test.service
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----
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<1> Specifies the node disruption policy.
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<2> Specifies a list of machine config file definitions and actions to take to changes on those paths. This list supports a maximum of 50 entries.
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<3> Specifies the series of actions to be executed upon changes to the specified files. Actions are applied in the order that they are set in this list. This list supports a maximum of 10 entries.
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<4> Specifies that the listed service is to be reloaded upon changes to the specified files.
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<5> Specifies the full name of the service to be acted upon.
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<6> Specifies the location of a file that is managed by a machine config. The actions in the policy apply when changes are made to the file in `path`.
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<7> Specifies a list of service names and actions to take upon changes to the SSH keys in the cluster.
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<8> Specifies a list of systemd unit names and actions to take upon changes to those units.
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.Verification
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* View the `MachineConfiguration` object file that you created:
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----
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$ oc get MachineConfiguration/cluster -o yaml
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----
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.Example output
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[source,yaml]
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----
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apiVersion: operator.openshift.io/v1
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kind: MachineConfiguration
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metadata:
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labels:
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machineconfiguration.openshift.io/role: worker
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name: cluster
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# ...
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status:
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nodeDisruptionPolicyStatus: <1>
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clusterPolicies:
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files:
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# ...
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- actions:
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- restart:
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serviceName: chronyd.service
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type: Restart
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path: /etc/chrony.conf
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sshkey:
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actions:
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- type: Drain
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- reload:
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serviceName: crio.service
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type: Reload
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- type: DaemonReload
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- restart:
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serviceName: crio.service
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type: Restart
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units:
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- actions:
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- type: Drain
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- reload:
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serviceName: crio.service
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type: Reload
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- type: DaemonReload
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- restart:
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serviceName: crio.service
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type: Restart
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name: test.se
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# ...
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----
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<1> Specifies the current cluster-validated policies.
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