Verifying a Ceph cluster's health

The Rook toolbox is a container with common tools used for rook debugging and testing. Let's perform the following steps to deploy the Rook toolbox to verify cluster health:

1. Deploy the Rook toolbox:

$ kubectl apply -f toolbox.yaml

2. Verify that the toolbox is running:

$ kubectl -n rook-ceph get pod -l "app=rook-ceph-tools"
NAME                             READY STATUS  RESTARTS AGE
rook-ceph-tools-6fdfc54b6d-4kdtm 1/1   Running 0        109s

3. Connect to the toolbox:

$ kubectl -n rook-ceph exec -it $(kubectl -n rook-ceph get pod -l "app=rook-ceph-tools" -o jsonpath='{.items[0].metadata.name}') bash

4. Verify that the cluster is in a healthy state (HEALTH_OK):

# ceph status
  cluster:
    id: 6b6e4bfb-bfef-46b7-94bd-9979e5e8bf04
    health: HEALTH_OK
  services:
    mon: 3 daemons, quorum a,b,c (age 12m)
    mgr: a(active, since 12m)
    osd: 3 osds: 3 up (since 11m), 3 in (since 11m)
  data:
    pools: 0 pools, 0 pgs
    objects: 0 objects, 0 B
    usage: 49 GiB used, 241 GiB / 291 GiB avail
    pgs:

5. When you are finished troubleshooting, remove the deployment using the following command:

$ kubectl -n rook-ceph delete deployment rook-ceph-tools

Now you know how to deploy the Rook toolbox with its common tools that are used to debug and test Rook.