version: "3.7"

networks:
  db-networks:
    ipam: # for static IP
      config:
        - subnet: "172.28.128.0/24"

# re-usable extension fields, https://docs.docker.com/compose/compose-file/#extension-fields.
x-node: &default-node
  privileged: true
  restart: always
  environment:
    MYSQL_ROOT_PASSWORD: "123456"

# In this case, gtid_domain_id should be the same, and gtid_strict_mode should be OFF.
services:
  mariadb_master:
    <<: *default-node
    image: mariadb:10.1
    command: --log-bin=/var/lib/mysql/mysql-bin --log_slave_updates=ON --server-id=1 --gtid_domain_id=0 --binlog-format=ROW
    container_name: mariadb_master
    hostname: mariadb_master
    ports:
      - "3306:3306"

  mariadb_slave:
    <<: *default-node
    image: mariadb:10.1
    command: --log-bin=/var/lib/mysql/mysql-bin --log_slave_updates=ON --server-id=2 --gtid_domain_id=0 --binlog-format=ROW
    container_name: mariadb_slave
    hostname: mariadb_slave
    ports:
      - "3307:3306"

  tidb: # downstream TiDB
    container_name: tidb
    hostname: tidb
    ports:
      - "4000:4000"
    image: pingcap/tidb:latest
    restart: always