Monitoring Db2 Warehouse startup after rebooting a node

When a node is restarted, confirm that Db2 Warehouse successfully starts up by monitoring the startup progress.

About this task

Db2 Warehouse should automatically start up after a Kubernetes worker node is started and the kubelet starts all the pods on the node. You can run a series of commands to monitor the startup progress.

1. Run the command kubectl get nodes and check the output to verify the following:
   • The Kubernetes worker nodes that were rebooted are in a ready state.
   • All nodes with the etcd operator role are in a ready state.
2. Monitor the Db2® pod startup progress:

   kubectl -n <namespace> get po | grep db2u

3. Check that all Db2 Warehouse database services pods are in a running state:

   kubectl -n <namespace> get po --selector type=engine

4. Confirm that the Db2 Warehouse instance is healthy.
   1. Exec into the Db2 pod.
   2. Become the Db2 Warehouse instance owner:

      su - ${DB2INSTANCE}

   3. Run the following commands to validate the health of the Db2 Warehouse instance:

      db2gcf -s   # Should show 'Active'

      db2pd - -member all | grep Member   # Should show an entry for each Db2 partition

      db2pd -db bludb - -member all | grep Member   # Should show an entry for each Db2 partition

      db2 list active databases   # Should show BLUDB database active

      db2 connect to BLUDB; db2 connect reset # Confirm you can connect to the database