.. csl1561030322454
.. _enable-additional-storage-classes:
=================================
Enable Additional Storage Classes
=================================
Additional storage classes can be added to the default rbd-provisioner
service.
.. rubric:: |context|
Some reasons for adding an additional storage class include:
.. _enable-additional-storage-classes-ul-nz1-r3q-43b:
- managing Ceph resources for particular namespaces in a separate Ceph
pool; simply for Ceph partitioning reasons
- using an alternate Ceph Storage Tier, for example. with faster drives
A modification to the configuration \(helm overrides\) of the
**rbd-provisioner** service is required to enable an additional storage class
The following example that illustrates adding a second storage class to be
utilized by a specific namespace.
.. note::
Due to limitations with templating and merging of overrides, the entire
storage class must be redefined in the override when updating specific
values.
.. rubric:: |proc|
#. List installed helm chart overrides for the platform-integ-apps.
.. code-block:: none
~(keystone_admin)$ system helm-override-list platform-integ-apps
+------------------+----------------------+
| chart name | overrides namespaces |
+------------------+----------------------+
| ceph-pools-audit | [u'kube-system'] |
| helm-toolkit | [] |
| rbd-provisioner | [u'kube-system'] |
+------------------+----------------------+
#. Review existing overrides for the rbd-provisioner chart. You will refer
to this information in the following step.
.. code-block:: none
~(keystone_admin)$ system helm-override-show platform-integ-apps rbd-provisioner kube-system
#. Create an overrides yaml file defining the new namespaces.
In this example we will create the file
/home/sysadmin/update-namespaces.yaml with the following content:
.. code-block:: none
classes:
- additionalNamespaces: [default, kube-public, new-app, new-app2, new-app3]
chunk_size: 64
crush_rule_name: storage_tier_ruleset
name: general
pool_name: kube-rbd
replication: 1
userId: ceph-pool-kube-rbd
userSecretName: ceph-pool-kube-rbd
- additionalNamespaces: [ new-sc-app ]
chunk_size: 64
crush_rule_name: storage_tier_ruleset
name: special-storage-class
pool_name: new-sc-app-pool
replication: 1
userId: ceph-pool-new-sc-app
userSecretName: ceph-pool-new-sc-app
#. Apply the overrides file to the chart.
.. code-block:: none
~(keystone_admin)$ system helm-override-update --values /home/sysadmin/update-namespaces.yaml \
platform-integ-apps rbd-provisioner
+----------------+-----------------------------------------+
| Property | Value |
+----------------+-----------------------------------------+
| name | rbd-provisioner |
| namespace | kube-system |
| user_overrides | classes: |
| | - additionalNamespaces: |
| | - default |
| | - kube-public |
| | - new-app |
| | - new-app2 |
| | - new-app3 |
| | chunk_size: 64 |
| | crush_rule_name: storage_tier_ruleset |
| | name: general |
| | pool_name: kube-rbd |
| | replication: 1 |
| | userId: ceph-pool-kube-rbd |
| | userSecretName: ceph-pool-kube-rbd |
| | - additionalNamespaces: |
| | - new-sc-app |
| | chunk_size: 64 |
| | crush_rule_name: storage_tier_ruleset |
| | name: special-storage-class |
| | pool_name: new-sc-app-pool |
| | replication: 1 |
| | userId: ceph-pool-new-sc-app |
| | userSecretName: ceph-pool-new-sc-app |
+----------------+-----------------------------------------+
#. Confirm that the new overrides have been applied to the chart.
The following output has been edited for brevity.
.. code-block:: none
~(keystone_admin)$ system helm-override-show platform-integ-apps rbd-provisioner kube-system
+--------------------+-----------------------------------------+
| Property | Value |
+--------------------+-----------------------------------------+
| combined_overrides | ... |
| | |
| name | |
| namespace | |
| system_overrides | ... |
| | |
| | |
| user_overrides | classes: |
| | - additionalNamespaces: |
| | - default |
| | - kube-public |
| | - new-app |
| | - new-app2 |
| | - new-app3 |
| | chunk_size: 64 |
| | crush_rule_name: storage_tier_ruleset |
| | name: general |
| | pool_name: kube-rbd |
| | replication: 1 |
| | userId: ceph-pool-kube-rbd |
| | userSecretName: ceph-pool-kube-rbd |
| | - additionalNamespaces: |
| | - new-sc-app |
| | chunk_size: 64 |
| | crush_rule_name: storage_tier_ruleset |
| | name: special-storage-class |
| | pool_name: new-sc-app-pool |
| | replication: 1 |
| | userId: ceph-pool-new-sc-app |
| | userSecretName: ceph-pool-new-sc-app |
+--------------------+-----------------------------------------+
#. Apply the overrides.
#. Run the :command:`application-apply` command.
.. code-block:: none
~(keystone_admin)$ system application-apply platform-integ-apps
+---------------+----------------------------------+
| Property | Value |
+---------------+----------------------------------+
| active | True |
| app_version | 1.0-5 |
| created_at | 2019-05-26T06:22:20.711732+00:00 |
| manifest_file | manifest.yaml |
| manifest_name | platform-integration-manifest |
| name | platform-integ-apps |
| progress | None |
| status | applying |
| updated_at | 2019-05-26T22:50:54.168114+00:00 |
+---------------+----------------------------------+
#. Monitor progress using the :command:`application-list` command.
.. code-block:: none
~(keystone_admin)$ system application-list
+-------------+---------+---------------+---------------+---------+-----------+
| application | version | manifest name | manifest file | status | progress |
+-------------+---------+---------------+---------------+---------+-----------+
| platform- | 1.0-8 | platform- | manifest.yaml | applied | completed |
| integ-apps | | integration- | | | |
| | | manifest | | | |
+-------------+---------+------ --------+---------------+---------+-----------+
You can now create and mount persistent volumes from the new
rbd-provisioner's **special** storage class from within the
**new-sc-app** application-specific namespace.