galera.yml

stack: jussi/galera
version: 0.1.0
expose: mariadb-lb
variables:
  mariadb_affinity:
    type: string
    default: label!=no-mariadb
    from:
      env: MARIADB_AFFINITY
      prompt: Affinity rule for MariaDB Galera
  mysql_root_pwd:
    type: string
    from:
      vault: ${STACK}-mysql-pwd
      random_string: 24
    to:
      vault: ${STACK}-mysql-pwd
  mysql_xtrabackup_pwd:
    type: string
    from:
      vault: ${STACK}-xtrabackup-pwd
      random_string: 24
    to:
      vault: ${STACK}-xtrabackup-pwd

services:
  mariadb-lb:
    image: kontena/lb:latest
    instances: 2
    mem_limit: 128m
    affinity:
      - "{{ mariadb_affinity }}"
  mariadb-galera:
    image: severalnines/mariadb:latest
    instances: 3
    affinity:
      - "{{ mariadb_affinity }}"
    deploy:
      wait_for_port: 3306
    secrets:
      - secret: ${STACK}-mysql-pwd
        name: MYSQL_ROOT_PASSWORD
        type: env
      - secret: ${STACK}-xtrabackup-pwd
        name: XTRABACKUP_PASSWORD
        type: env
    environment:
      DISCOVERY_SERVICE: etcd.kontena.local:2379
      CLUSTER_NAME: "${STACK}"
      KONTENA_LB_MODE: tcp
      KONTENA_LB_INTERNAL_PORT: 3306
      KONTENA_LB_EXTERNAL_PORT: 3306
    links:
      - mariadb-lb
    volumes:
      - galera-data:/var/lib/mysql


volumes:
  galera-data: # scope=instance
    external: true