Chapter 18. Validating an installation

Procedure

1. Obtain the cluster version and overall status:

   $ oc get clusterversion

   Example output

   NAME      VERSION   AVAILABLE   PROGRESSING   SINCE   STATUS
   version   4.6.4     True        False         6m25s   Cluster version is 4.6.4

   The example output indicates that the cluster has been installed successfully.

2. If the cluster status indicates that the installation is still progressing, you can obtain more detailed progress information by checking the status of the Operators:

   $ oc get clusteroperators.config.openshift.io

3. View a detailed summary of cluster specifications, update availability, and update history:

   $ oc describe clusterversion

4. List the current update channel:

   $ oc get clusterversion -o jsonpath='{.items[0].spec}{"\n"}'

   Example output

   {"channel":"stable-4.6","clusterID":"245539c1-72a3-41aa-9cec-72ed8cf25c5c"}

5. Review the available cluster updates:

   $ oc adm upgrade

   Example output

   Cluster version is 4.6.4
   
   Updates:
   
   VERSION IMAGE
   4.6.6   quay.io/openshift-release-dev/ocp-release@sha256:c7e8f18e8116356701bd23ae3a23fb9892dd5ea66c8300662ef30563d7104f39

Procedure

1. List the status of the cluster nodes. Verify that the output lists all of the expected control plane and compute nodes and that each node has a

   Ready

   status:

   $ oc get nodes

   Example output

   NAME                          STATUS   ROLES    AGE   VERSION
   compute-1.example.com         Ready    worker   33m   v1.19.0+9f84db3
   control-plane-1.example.com   Ready    master   41m   v1.19.0+9f84db3
   control-plane-2.example.com   Ready    master   45m   v1.19.0+9f84db3
   compute-2.example.com         Ready    worker   38m   v1.19.0+9f84db3
   compute-3.example.com         Ready    worker   33m   v1.19.0+9f84db3
   control-plane-3.example.com   Ready    master   41m   v1.19.0+9f84db3

2. Review CPU and memory resource availability for each cluster node:

   $ oc adm top nodes

   Example output

   NAME                          CPU(cores)   CPU%   MEMORY(bytes)   MEMORY%
   compute-1.example.com         128m         8%     1132Mi          16%
   control-plane-1.example.com   801m         22%    3471Mi          23%
   control-plane-2.example.com   1718m        49%    6085Mi          40%
   compute-2.example.com         935m         62%    5178Mi          75%
   compute-3.example.com         111m         7%     1131Mi          16%
   control-plane-3.example.com   942m         26%    4100Mi          27%

Procedure

1. In the Administrator perspective, navigate to Home Overview Details OpenShift Cluster Manager to open the Overview page for the cluster in OpenShift Cluster Manager.

   Note

   Alternatively, you can navigate to OpenShift Cluster Manager directly and select your cluster ID from the list of available clusters.

2. In the Overview page, review the following information about your cluster:

   • vCPU and memory availability and resource usage
   • The cluster ID, status, type, location, and the provider name
   • Node counts by node type
   • Cluster version details, the creation date of the cluster, and the name of the cluster owner
   • The life cycle support status of the cluster
   • Subscription information, including the service level agreement (SLA) status, the subscription unit type, the production status of the cluster, the subscription obligation, and the service level
   • A cluster history

3. Navigate to the Monitoring page to review the following information:

   • A list of any issues that have been detected
   • A list of alerts that are firing
   • The cluster Operator status and version
   • Cluster resource usage

4. Navigate to the Insights page to review the following information provided by Red Hat Insights:

   • Potential issues that your cluster might be exposed to, categorized by risk level
   • Health-check status by category

Procedure

1. In the Administrator perspective in the OpenShift Container Platform web console, navigate to Monitoring Dashboards.
2. Choose a dashboard in the Dashboard list. Some dashboards, such as the etcd dashboard, produce additional sub-menus when selected.

3. Optional: Select a time range for the graphs in the Time Range list.

   • Select a pre-defined time period.

   • Set a custom time range by selecting Custom time range in the Time Range list.

     1. Input or select the From and To dates and times.
     2. Click Save to save the custom time range.
4. Optional: Select a Refresh Interval.
5. Hover over each of the graphs within a dashboard to display detailed information about specific items.

Procedure

1. In the Administrator perspective, navigate to the Monitoring Alerting Alerts page.
2. Review the alerts that are firing, including their Severity, State, and Source.
3. Select an alert to view more detailed information in the Alert Details page.