198 lines
10 KiB
ReStructuredText
198 lines
10 KiB
ReStructuredText
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.. csl1561030322454
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.. _enable-rbd-readwriteonly-additional-storage-classes:
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===================================================
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Enable RBD ReadWriteOnly Additional Storage Classes
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===================================================
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Additional storage classes can be added to the default |RBD| provisioner
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service.
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.. rubric:: |context|
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Some reasons for adding an additional storage class include:
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.. _enable-rbd-readwriteonly-additional-storage-classes-ul-nz1-r3q-43b:
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- managing Ceph resources for particular namespaces in a separate Ceph
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pool; simply for Ceph partitioning reasons
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- using an alternate Ceph Storage Tier, for example. with faster drives
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A modification to the configuration (Helm overrides) of the
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|RBD| provisioner service is required to enable an additional storage class
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The following example that illustrates adding a second storage class to be
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utilized by a specific namespace.
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.. note::
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Due to limitations with templating and merging of overrides, the entire
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storage class must be redefined in the override when updating specific
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values.
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.. rubric:: |proc|
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#. List installed Helm chart overrides for the platform-integ-apps.
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.. code-block:: none
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~(keystone_admin)]$ system helm-override-list platform-integ-apps
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+--------------------+----------------------+
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| chart name | overrides namespaces |
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+--------------------+----------------------+
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| ceph-pools-audit | ['kube-system'] |
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| cephfs-provisioner | ['kube-system'] |
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| rbd-provisioner | ['kube-system'] |
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+--------------------+----------------------+
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#. Review existing overrides for the rbd-provisioner chart. You will refer
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to this information in the following step.
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.. code-block:: none
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~(keystone_admin)$ system helm-override-show platform-integ-apps rbd-provisioner kube-system
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#. Create an overrides yaml file defining the new namespaces.
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In this example we will create the file
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``/home/sysadmin/update-storageclass.yaml`` with the following content:
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.. code-block:: none
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~(keystone_admin)]$ cat <<EOF > ~/update-storageclass.yaml
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storageClasses:
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- additionalNamespaces: [default, kube-public, new-app, new-app2, new-app3]
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chunk_size: 64
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crush_rule_name: storage_tier_ruleset
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name: general
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pool_name: kube-rbd
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replication: 1
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userId: ceph-pool-kube-rbd
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userSecretName: ceph-pool-kube-rbd
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- additionalNamespaces: [ new-sc-app ]
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chunk_size: 64
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crush_rule_name: storage_tier_ruleset
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name: special-storage-class
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pool_name: new-sc-app-pool
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replication: 1
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userId: ceph-pool-new-sc-app
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userSecretName: ceph-pool-new-sc-app
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EOF
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#. Apply the overrides file to the chart.
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.. code-block:: none
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~(keystone_admin)]$ system helm-override-update --values /home/sysadmin/update-storageclass.yaml platform-integ-apps rbd-provisioner kube-system
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+----------------+-----------------------------------------+
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| Property | Value |
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+----------------+-----------------------------------------+
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| name | rbd-provisioner |
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| namespace | kube-system |
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| user_overrides | storageClasses: |
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| | - additionalNamespaces: |
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| | - default |
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| | - kube-public |
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| | - new-app |
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| | - new-app2 |
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| | - new-app3 |
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| | chunk_size: 64 |
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| | crush_rule_name: storage_tier_ruleset |
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| | name: general |
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| | pool_name: kube-rbd |
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| | replication: 1 |
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| | userId: ceph-pool-kube-rbd |
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| | userSecretName: ceph-pool-kube-rbd |
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| | - additionalNamespaces: |
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| | - new-sc-app |
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| | chunk_size: 64 |
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| | crush_rule_name: storage_tier_ruleset |
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| | name: special-storage-class |
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| | pool_name: new-sc-app-pool |
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| | replication: 1 |
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| | userId: ceph-pool-new-sc-app |
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| | userSecretName: ceph-pool-new-sc-app |
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+----------------+-----------------------------------------+
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#. Confirm that the new overrides have been applied to the chart.
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The following output has been edited for brevity.
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.. code-block:: none
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~(keystone_admin)]$ system helm-override-show platform-integ-apps rbd-provisioner kube-system
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+--------------------+------------------------------------------------------+
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| Property | Value |
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+--------------------+------------------------------------------------------+
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| attributes | enabled: true |
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| | |
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| combined_overrides | ... |
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| | |
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| name | |
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| namespace | |
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| system_overrides | ... |
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| | |
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| user_overrides | storageClasses: |
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| | - additionalNamespaces: |
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| | - default |
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| | - kube-public |
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| | - new-app |
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| | - new-app2 |
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| | - new-app3 |
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| | chunk_size: 64 |
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| | crush_rule_name: storage_tier_ruleset |
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| | name: general |
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| | pool_name: kube-rbd |
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| | replication: 1 |
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| | userId: ceph-pool-kube-rbd |
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| | userSecretName: ceph-pool-kube-rbd |
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| | - additionalNamespaces: |
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| | - new-sc-app |
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| | chunk_size: 64 |
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| | crush_rule_name: storage_tier_ruleset |
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| | name: special-storage-class |
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| | pool_name: new-sc-app-pool |
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| | replication: 1 |
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| | userId: ceph-pool-new-sc-app |
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| | userSecretName: ceph-pool-new-sc-app |
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+--------------------+------------------------------------------------------+
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#. Apply the overrides.
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#. Run the :command:`application-apply` command.
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.. code-block:: none
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~(keystone_admin)]$ system application-apply platform-integ-apps
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+---------------+--------------------------------------+
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| Property | Value |
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+---------------+--------------------------------------+
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| active | True |
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| app_version | 1.0-62 |
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| created_at | 2022-12-14T04:14:08.878186+00:00 |
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| manifest_file | fluxcd-manifests |
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| manifest_name | platform-integ-apps-fluxcd-manifests |
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| name | platform-integ-apps |
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| progress | None |
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| status | applying |
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| updated_at | 2022-12-14T04:45:09.204231+00:00 |
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+---------------+--------------------------------------+
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#. Monitor progress using the :command:`application-list` command.
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.. code-block:: none
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~(keystone_admin)]$ system application-list
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+--------------------------+---------+-------------------------------------------+------------------+----------+-----------+
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| application | version | manifest name | manifest file | status | progress |
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+--------------------------+---------+-------------------------------------------+------------------+----------+-----------+
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| platform-integ-apps | 1.0-62 | platform-integ-apps-fluxcd-manifests | fluxcd-manifests | applied | completed |
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+--------------------------+---------+-------------------------------------------+------------------+----------+-----------+
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You can now create and mount persistent volumes from the new |RBD|
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provisioner's **special** storage class from within the **new-sc-app**
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application-specific namespace.
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