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Provide options to pass in Ceph cluster-id

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This commit provides the option to pass in Ceph cluster-id instead
of a MON list from the storage class.

This helps in moving towards a stateless CSI implementation.

Tested the following,
- PV provisioning and staging using cluster-id in storage class
- PV provisioning and staging using MON list in storage class

Did not test,
- snapshot operations in either forms of the storage class

Signed-off-by: ShyamsundarR <srangana@redhat.com>
This commit is contained in:
ShyamsundarR
2019-03-02 12:29:52 -05:00
committed by mergify[bot]
parent ff7d649c9d
commit 97f8c4b677
15 changed files with 897 additions and 48 deletions
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36
examples/README.md
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@ -12,6 +12,11 @@ Once the plugin is successfully deployed, you'll need to customize
setup.
Please consult the documentation for info about available parameters.
**NOTE:** See section
[Cluster ID based configuration](#cluster-id-based-configuration) if using
the `clusterID` instead of `monitors` or `monValueFromSecret` options in the
storage class for RBD based provisioning before proceeding.
After configuring the secrets, monitors, etc. you can deploy a
testing Pod mounting a RBD image / CephFS volume:
@ -213,3 +218,34 @@ Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 4194304 bytes / 4194304 bytes
```
## Cluster ID based configuration
Before creating a storage class that uses the option `clusterID` to refer to a
Ceph cluster,
**NOTE**: Substitute the output of `ceph fsid` instead of `<cluster-fsid>` in
the mentioned template YAML files, and also the Ceph admin ID and
credentials in their respective options. Further, update options like
`monitors` and `pools` in the respective YAML files to contain the
appropriate information.
Create the following config maps and secrets
* `kubectl create -f ./rbd/template-ceph-cluster-ID-provisioner-secret.yaml`
* `kubectl create -f ./rbd/template-ceph-cluster-ID-publish-secret.yaml`
* `kubectl create -f ./rbd/template-ceph-cluster-ID-config.yaml`
Modify the deployed CSI pods to additionally pass in the config maps and
secrets as volumes,
* `kubectl patch daemonset csi-rbdplugin --patch "$(cat ./rbd/template-csi-rbdplugin-patch.yaml)"`
* `kubectl patch statefulset csi-rbdplugin-provisioner --patch "$(cat ./rbd/template-csi-rbdplugin-provisioner-patch.yaml)"`
Restart the provisioner and node plugin daemonset.
Storage class and snapshot class, using the `<cluster-fsid>` as the value for
the option `clusterID`, can now be created on the cluster.
Remaining steps to test functionality remains the same as mentioned in the
sections above.