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Document URL: https://docs.openshift.com/container-platform/3.11/install_config/cluster_metrics.html#metrics-ansible-variables Section Number and Name: Specifying Metrics Ansible Variables Describe the issue: The document doesn't have information about the default value when users don't specify `openshift_metrics_cassandra_nodeselector` / `openshift_metrics_hawkular_nodeselector ` / `openshift_metrics_heapster_nodeselector `. If users don't have any specific value in their inventory, the nodeselector becomes blank value("") like this: ``` $ oc get project openshift-infra -o yaml apiVersion: project.openshift.io/v1 kind: Project metadata: annotations: openshift.io/node-selector: "" ... ``` It means that the pods in openshift-infra ignore defaultNodeSelector and may be deployed to any kind of node. I think the behavior is confusing and should be documented. Suggestions for improvement: The documentation about the default behavior can be added to improvement. Additional information:
Junqi -- Can you help with this? What is the installation behavior if the user does not specify `openshift_metrics_cassandra_nodeselector`, `openshift_metrics_hawkular_nodeselector `, or `openshift_metrics_heapster_nodeselector `? If the user specifies one of these parameters, does he need to set them all? Thanks for any help. Michael
(In reply to Michael Burke from comment #1) > Junqi -- Can you help with this? > > What is the installation behavior if the user does not specify > `openshift_metrics_cassandra_nodeselector`, > `openshift_metrics_hawkular_nodeselector `, or > `openshift_metrics_heapster_nodeselector `? > > If the user specifies one of these parameters, does he need to set them all? > > Thanks for any help. > > Michael If they are set, the components will be deployed to the nodes which match the nodeSelector. If not set, they can deployed on any schedulable nodes
Docs PR https://github.com/openshift/openshift-docs/pull/20900
lgtm
Changes are live https://docs.openshift.com/container-platform/3.11/install_config/cluster_metrics.html#metrics-ansible-variables https://access.redhat.com/documentation/en-us/openshift_container_platform/3.11/html-single/configuring_clusters/index#metrics-ansible-variables