Chapter 11. Post-deployment operations to manage the Red Hat Ceph Storage cluster

Procedure

1. Log in to the undercloud node as the stack user.
2. Open the file deployed_ceph.yaml or the file you use in your environment to define the Ceph Storage cluster configuration.
3. Locate the ApplyCephConfigOverridesOnUpdate parameter.
4. Change the ApplyCephConfigOverridesOnUpdate parameter value to false.
5. Save the file.

Procedure

1. Run the following command to source the file:

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   $ source ~/overcloudrc

   This loads the necessary environment variables to interact with your overcloud from the undercloud CLI.

2. To return to interacting with the undercloud, run the following command:

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   $ source ~/stackrc

Procedure

1. Log in to a Controller node as the tripleo-admin user:

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   $ nova list
   $ ssh tripleo-admin@192.168.0.25

2. Check the health of the Ceph cluster:

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   $ sudo cephadm shell -- ceph health

   If the Ceph cluster has no issues, the command reports back HEALTH_OK. This means the Ceph cluster is safe to use.

3. Log in to an overcloud node that runs the Ceph monitor service and check the status of all OSDs in the Ceph cluster:

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   $ sudo cephadm shell -- ceph osd tree

4. Check the status of the Ceph Monitor quorum:

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   $ sudo cephadm shell -- ceph quorum_status

   This shows the monitors participating in the quorum and which one is the leader.

5. Verify that all Ceph OSDs are running:

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   $ sudo cephadm shell -- ceph osd stat

Procedure

1. Log in to the undercloud node as the stack user.

2. Source the overcloudrc file:

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   $ source overcloudrc

3. Check the Block Storage volume existing types:

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   $ cinder type-list

4. Create the new Block Storage volume fast_tier:

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   $ cinder type-create fast_tier

5. Check that the Block Storage type is created:

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   $ cinder type-list

6. When the fast_tier Block Storage type is available, set the fastpool as the Block Storage volume back end for the new tier that you created:

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   $ cinder type-key fast_tier set volume_backend_name=tripleo_ceph_fastpool

7. Use the new tier to create new volumes:

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   $ cinder create 1 --volume-type fast_tier --name fastdisk