#!/bin/bash

  mysql:
    image: mysql:5.6
    hostname: "mysql"
    container_name: mysql
    command: --default-authentication-plugin=mysql_native_password
    restart: always
    environment:
      MYSQL_ROOT_PASSWORD: root
      MYSQL_DATABASE: app
      MYSQL_USER: app
      MYSQL_PASSWORD: app
    volumes:
      - /opt/mysql:/var/lib/mysql
      - ./dbinit:/docker-entrypoint-initdb.d
    ports:
      - "3306:3306"





docker-compose down
rm -rf ./master/data/*
rm -rf ./slave/data/*
docker-compose build
docker-compose up -d

until docker exec mysql_master sh -c 'export MYSQL_PWD=111; mysql -u root -e ";"'
do
    echo "Waiting for mysql_master database connection..."
    sleep 4
done

priv_stmt='GRANT REPLICATION SLAVE ON *.* TO "mydb_slave_user"@"%" IDENTIFIED BY "mydb_slave_pwd"; FLUSH PRIVILEGES;'
docker exec mysql_master sh -c "export MYSQL_PWD=111; mysql -u root -e '$priv_stmt'"

until docker-compose exec mysql_slave sh -c 'export MYSQL_PWD=111; mysql -u root -e ";"'
do
    echo "Waiting for mysql_slave database connection..."
    sleep 4
done

docker-ip() {
    docker inspect --format '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' "$@"
}

MS_STATUS=`docker exec mysql_master sh -c 'export MYSQL_PWD=111; mysql -u root -e "SHOW MASTER STATUS"'`
CURRENT_LOG=`echo $MS_STATUS | awk '{print $6}'`
CURRENT_POS=`echo $MS_STATUS | awk '{print $7}'`

start_slave_stmt="CHANGE MASTER TO MASTER_HOST='$(docker-ip mysql_master)',MASTER_USER='mydb_slave_user',MASTER_PASSWORD='mydb_slave_pwd',MASTER_LOG_FILE='$CURRENT_LOG',MASTER_LOG_POS=$CURRENT_POS; START SLAVE;"
start_slave_cmd='export MYSQL_PWD=111; mysql -u root -e "'
start_slave_cmd+="$start_slave_stmt"
start_slave_cmd+='"'
docker exec mysql_slave sh -c "$start_slave_cmd"

docker exec mysql_slave sh -c "export MYSQL_PWD=111; mysql -u root -e 'SHOW SLAVE STATUS \G'"