wordpress blog with traefik load balancing and mariadb cluster

docker-compose.yml

version: '3.4'

services:
  web_traefik:
    image: traefik
    ports:
      - "80:80"
      - "8888:8080"
    command:
      - --docker
      - --docker.swarmMode
      - --docker.domain=docker.localhost
      - --docker.watch
      - --api
    deploy:
      placement:
        constraints:
          - node.role == manager
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    networks:
      - frontend-network

  wordpress:
    image: wordpress
    environment:
      - WORDPRESS_DB_USER=wordpress
      - WORDPRESS_DB_PASSWORD=wordpress
    deploy:
      replicas: 2
      labels:
        - traefik.port=80
        - traefik.docker.network=blog_frontend-network
        - traefik.backend.loadbalancer.sticky=true
        - traefik.backend.loadbalancer.stickiness=true
        - "traefik.frontend.rule=PathPrefix:/"
    networks:
      - frontend-network
      - backend-network
  
  mysql-seed:
    image: colinmollenhour/mariadb-galera-swarm
    deploy:
      endpoint_mode: dnsrr
    environment:
      - MYSQL_DATABASE=wordpress
      - MYSQL_USER=wordpress
      - MYSQL_PASSWORD=wordpress
      - XTRABACKUP_PASSWORD=wordpressbackup
    command:
      - seed
    networks:
      - backend-network
    
  mysql:
    image: colinmollenhour/mariadb-galera-swarm
    deploy:
      endpoint_mode: dnsrr
      replicas: 2
    environment:
      - XTRABACKUP_PASSWORD=wordpressbackup
    command:
      - node
      - tasks.mysql-seed,tasks.mysql
    networks:
      - backend-network


networks: 
  frontend-network: {}
  backend-network: {}