MariaDB Galera Cluster Openshift Template

mariadb-galera-persistent-template.yml

# Source: https://github.com/getupcloud/openshift-mariadb-galera/blob/master/mariadb-galera-persistent-template.yml
---
kind: Template
apiVersion: v1
metadata:
  name: mariadb-galera-persistent
  annotations:
    description: MariaDB Galera cluster persistent (NFS)
    iconClass: icon-mariadb
    tags: database,mysql,replication,mariadb,galera,nfs
parameters:
- name: MYSQL_SERVICE_NAME
  description: Service name for the MariaDB service
  value: galera
- name: GALERA_PETSET_NAME
  description: PetSet name
  value: mysql
- name: NUMBER_OF_GALERA_MEMBERS
  description: Number of Galera Nodes
  value: "3"
  required: true
- name: VOLUME_PV_NAME
  description: Volume PV basename. If the name is "datadir", it you need to create datadir-GALERA_PETSET_NAME-number
  value: datadir
  required: true
- name: VOLUME_CAPACITY
  description: Volume space available for data, e.g. 512Mi, 2Gi.
  required: true
  value: 5Gi
- name: MYSQL_USER
  description: The username that clients will use to connect to the server
  generate: expression
  from: "[a-zA-Z]{8}"
- name: MYSQL_PASSWORD
  description: The password for the MYSQL_USER
  generate: expression
  from: "[a-zA-Z0-9]{12}"
- name: MYSQL_DATABASE
  description: The name of the database that will be created and replicated
  value: defaultdb
- name: MYSQL_ROOT_PASSWORD
  description: The password for the root user
  generate: expression
  from: "[a-zA-Z0-9]{12}"

objects:
- apiVersion: v1
  kind: Service
  metadata:
    annotations:
      service.alpha.kubernetes.io/tolerate-unready-endpoints: "true"
    name: "${MYSQL_SERVICE_NAME}"
    labels:
      app: "${GALERA_PETSET_NAME}"
  spec:
    ports:
    - port: 3306
      name: "${GALERA_PETSET_NAME}"
    clusterIP: None
    selector:
      app: "${GALERA_PETSET_NAME}"


- apiVersion: apps/v1alpha1
  kind: PetSet
  metadata:
    name: "${GALERA_PETSET_NAME}"
  spec:
    serviceName: "${MYSQL_SERVICE_NAME}"
    replicas: "${NUMBER_OF_GALERA_MEMBERS}"
    template:
      metadata:
        labels:
          app: "${GALERA_PETSET_NAME}"
        annotations:
          pod.alpha.kubernetes.io/initialized: "true"
      spec:
        containers:
        - name: "${GALERA_PETSET_NAME}"
          image: adfinissygroup/k8s-mariadb-galera-centos:v002
          imagePullPolicy: IfNotPresent
          ports:
          - containerPort: 3306
            name: mysql
          - containerPort: 4444
            name: sst
          - containerPort: 4567
            name: replication
          - containerPort: 4568
            name: ist
          readinessProbe:
            exec:
              command:
              - /usr/share/container-scripts/mysql/readiness-probe.sh
            initialDelaySeconds: 15
            timeoutSeconds: 5
          volumeMounts:
          - name: "${VOLUME_PV_NAME}"
            mountPath: /var/lib/mysql
          env:
            - name: POD_NAMESPACE
              valueFrom:
                fieldRef:
                  apiVersion: v1
                  fieldPath: metadata.namespace
            - name: MYSQL_USER
              value: "${MYSQL_USER}"
            - name: MYSQL_PASSWORD
              value: "${MYSQL_PASSWORD}"
            - name: MYSQL_DATABASE
              value: "${MYSQL_DATABASE}"
            - name: MYSQL_ROOT_PASSWORD
              value: "${MYSQL_ROOT_PASSWORD}"
            - name: GALERA_PETSET_NAME
              value: "${GALERA_PETSET_NAME}"
    volumeClaimTemplates:
    - metadata:
        name: "${VOLUME_PV_NAME}"
      spec:
        accessModes: [ "ReadWriteOnce" ]
        resources:
          requests:
            storage: "${VOLUME_CAPACITY}"