openstack/openstack-helm-infra
Code Issues Proposed changes
f28a6ce288
openstack-helm-infra/mariadb
History
Markin, Sergiy (sm515x) 5c4056ad34 [DATABASE] Add verify databases backup 
HTK - added verify_databases_backup_in_directory function that is
going to be defined inside mariadb/postgresql/etcd charts.

Mariadb chart - added verify_databases_backup_archives function
implementation.

Added mariadb-verify container to mariadb-backup cronjob to run
verification process.

Added remove backup verification pocess - comparition of local and remote file md5 hashes.

PostgreSQL chart - added empty implementation of verify_databases_backup_archives() function. This is a subject for future realization.

Change-Id: I361cdb92c66b0b27539997d697adfd1e93c9a29d
2022-09-09 01:41:00 +00:00
..
files Migrate CronJob resources to batch/v1 and PodDisruptionBudget resources to policy/v1 2022-05-10 15:12:53 -04:00
templates [DATABASE] Add verify databases backup 2022-09-09 01:41:00 +00:00
values_overrides [DATABASE] Add verify databases backup 2022-09-09 01:41:00 +00:00
.helmignore MariaDB: Move chart to openstack-helm-infra 2018-09-04 18:57:53 -05:00
Chart.yaml [DATABASE] Add verify databases backup 2022-09-09 01:41:00 +00:00
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 [DATABASE] Add verify databases backup 2022-09-09 01:41:00 +00:00

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 When the job is no longer active, future StatefulSets provisioned will leverage the existing cluster members as gcomm endpoints.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