History

Markin, Sergiy (sm515x) 322e5b8ccb [MariaDB] Fix ingress cluster role privileges This patchset is adding update priviledge to ingress cluster role in order to let it to update mariadb state configmap. The problem appeared after upgrading nginx controller up to v1.1.3 in https://review.opendev.org/c/openstack/openstack-helm-infra/+/840691 Change-Id: I962ac336bf6b3588db88b04e2259de1aa20b1221		2022-05-13 17:42:32 -05:00
..
files	Migrate CronJob resources to batch/v1 and PodDisruptionBudget resources to policy/v1	2022-05-10 15:12:53 -04:00
templates	[MariaDB] Fix ingress cluster role privileges	2022-05-13 17:42:32 -05:00
values_overrides	Remove panko residue	2021-05-18 11:01:40 +08:00
.helmignore	MariaDB: Move chart to openstack-helm-infra	2018-09-04 18:57:53 -05:00
Chart.yaml	[MariaDB] Fix ingress cluster role privileges	2022-05-13 17:42:32 -05:00
README.rst	MariaDB: Move chart to openstack-helm-infra	2018-09-04 18:57:53 -05:00
requirements.yaml	Update htk requirements	2021-10-06 01:02:28 +00:00
values.yaml	Migrate CronJob resources to batch/v1 and PodDisruptionBudget resources to policy/v1	2022-05-10 15:12:53 -04:00

README.rst

openstack-helm/mariadb

By default, this chart creates a 3-member mariadb galera cluster.

This chart leverages StatefulSets, with persistent storage.

It creates a job that acts as a temporary standalone galera cluster. This host is bootstrapped with authentication and then the WSREP bindings are exposed publicly. The cluster members being StatefulSets are provisioned one at a time. The first host must be marked as Ready before the next host will be provisioned. This is determined by the readinessProbes which actually validate that MySQL is up and responsive.

The configuration leverages xtrabackup-v2 for synchronization. This may later be augmented to leverage rsync which has some benefits.

Once the seed job completes, which completes only when galera reports that it is Synced and all cluster members are reporting in thus matching the cluster count according to the job to the replica count in the helm values configuration, the job is terminated. When the job is no longer active, future StatefulSets provisioned will leverage the existing cluster members as gcomm endpoints. It is only when the job is running that the cluster members leverage the seed job as their gcomm endpoint. This ensures you can restart members and scale the cluster.

The StatefulSets all leverage PVCs to provide stateful storage to /var/lib/mysql.

You must ensure that your control nodes that should receive mariadb instances are labeled with openstack-control-plane=enabled, or whatever you have configured in values.yaml for the label configuration:

kubectl label nodes openstack-control-plane=enabled --all