63cd4f5fdc
Incorporated patchset 1 review comments Updated patchset 5 review comments Updated patchset 6 review comments Fixed merge conflicts Updated patchset 8 review comments Change-Id: Icd7b08ab69273f6073b960a13cf59905532f851a Signed-off-by: Juanita-Balaraj <juanita.balaraj@windriver.com>
9.6 KiB
Enable RBD ReadWriteOnly Additional Storage Classes
Additional storage classes can be added to the default provisioner service.
Some reasons for adding an additional storage class include:
- 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 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.
List installed Helm chart overrides for the platform-integ-apps.
~(keystone_admin)$ system helm-override-list platform-integ-apps +--------------------+----------------------+ | chart name | overrides namespaces | +--------------------+----------------------+ | ceph-pools-audit | [u'kube-system'] | | cephfs-provisioner | [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.
~(keystone_admin)$ system helm-override-show platform-integ-apps rbd-provisioner kube-systemCreate 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:
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-appApply the overrides file to the chart.
~(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.
~(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
application-applycommand.~(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
application-listcommand.~(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 provisioner's special storage class from within the new-sc-app application-specific namespace.