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docs: explain the ceph-validate role and how it validates configuration 

Signed-off-by: Andrew Schoen <aschoen@redhat.com>
pull/2619/head
Andrew Schoen 2018-05-10 11:30:39 -05:00 committed by Guillaume Abrioux
parent cf2868f0d1
commit fd7bb16e2f
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docs/source/index.rst
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@ -121,6 +121,29 @@ appropriate for your cluster setup. Perform the following steps to prepare your
It's important the playbook you use is placed at the root of the ``ceph-ansible`` project. This is how ansible will be able to find the roles that
``ceph-ansible`` provides.
Configuration Validation
------------------------
The ``ceph-ansible`` project provides config validation through the ``ceph-validate`` role. If you are using one of the provided playbooks this role will
be run early in the deployment as to ensure you've given ``ceph-ansible`` the correct config. This check is only making sure that you've provided the
proper config settings for your cluster, not that the values in them will produce a healthy cluster. For example, if you give an incorrect address for
``monitor_address`` then the mon will still fail to join the cluster.
An example of a validation failure might look like::
TASK [ceph-validate : validate provided configuration] *************************
task path: /Users/andrewschoen/dev/ceph-ansible/roles/ceph-validate/tasks/main.yml:3
Wednesday 02 May 2018 13:48:16 -0500 (0:00:06.984) 0:00:18.803 *********
[ERROR]: [mon0] Validation failed for variable: osd_objectstore
[ERROR]: [mon0] Given value for osd_objectstore: foo
[ERROR]: [mon0] Reason: osd_objectstore must be either 'bluestore' or 'filestore'
fatal: [mon0]: FAILED! => {
"changed": false
}
ceph-ansible - choose installation method
-----------------------------------------