openstack/openstack-helm-infra
Code Issues Proposed changes
3408809e3d
openstack-helm-infra/mariadb
History
Gage Hugo d14d826b26 Remove OSH Authors copyright 
The current copyright refers to a non-existent group
"openstack helm authors" with often out-of-date references that
are confusing when adding a new file to the repo.

This change removes all references to this copyright by the
non-existent group and any blank lines underneath.

Change-Id: I1882738cf9757c5350a8533876fd37b5920b5235
2020-05-07 02:11:15 +00:00
..
files Fix ipv6 address cannot be parsed in mariadb-ingress pod 2020-05-06 01:53:36 +00:00
templates Remove OSH Authors copyright 2020-05-07 02:11:15 +00:00
values_overrides Mariadb: Add ingress network policy overrides 2020-03-17 20:00:42 +00:00
.helmignore MariaDB: Move chart to openstack-helm-infra 2018-09-04 18:57:53 -05:00
Chart.yaml Remove OSH Authors copyright 2020-05-07 02:11:15 +00:00
README.rst MariaDB: Move chart to openstack-helm-infra 2018-09-04 18:57:53 -05:00
requirements.yaml Remove OSH Authors copyright 2020-05-07 02:11:15 +00:00
values.yaml Remove OSH Authors copyright 2020-05-07 02:11:15 +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 When the job is no longer active, future StatefulSets provisioned will leverage the existing cluster members as gcomm endpoints.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