openstack/openstack-helm-infra
Code Issues Proposed changes
00a64aa807
openstack-helm-infra/mariadb
History
Andrii Ostapenko 824f168efc Undo octal-values restriction together with corresponding code 
Unrestrict octal values rule since benefits of file modes readability
exceed possible issues with yaml 1.2 adoption in future k8s versions.
These issues will be addressed when/if they occur.

Also ensure osh-infra is a required project for lint job, that matters
when running job against another project.

Change-Id: Ic5e327cf40c4b09c90738baff56419a6cef132da
Signed-off-by: Andrii Ostapenko <andrii.ostapenko@att.com>
2020-07-07 15:42:53 +00:00
..
files Fix ipv6 address cannot be parsed in mariadb-ingress pod 2020-05-06 01:53:36 +00:00
templates Undo octal-values restriction together with corresponding code 2020-07-07 15:42:53 +00:00
values_overrides Merge "Remove retired congress" 2020-06-05 04:29:20 +00:00
.helmignore MariaDB: Move chart to openstack-helm-infra 2018-09-04 18:57:53 -05:00
Chart.yaml Introduces templates linting 2020-06-11 23:29:42 -05:00
README.rst MariaDB: Move chart to openstack-helm-infra 2018-09-04 18:57:53 -05:00
requirements.yaml Introduces templates linting 2020-06-11 23:29:42 -05:00
values.yaml Mariadb backup/restore enhancements 2020-06-24 21:13:21 +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 When the job is no longer active, future StatefulSets provisioned will leverage the existing cluster members as gcomm endpoints.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