mysql-schema-sync同步两个实例

参考：

需求：测试环境表结构变动同步到开发环境，两个实例各有数百个库，不适合每个库写一个配置文件

环境：操作系统ubuntu16.04、两个数据库实例percona5.7、golang版本1.12

安装mysql-schema-sync：go get -u github.com/hidu/mysql-schema-sync

config.json文件如下

{

     "source":"slave:slave@(172.17.40.110:3306)/temp_2",

     "dest":"slave:slave@(172.17.40.148:3306)/temp_2",

     "tables":[],

     "tables_ignore":["a”], ##最新的不指定默认全部ignore

     "email":{

          "send_mail":true,

         "smtp_host":"",

         "from":"",

         "password":"asah8ncmbr7yhtg23nkv",

         "to":""

     }

} 

 

python对比脚本如下，执行的话把最后的命令改成执行的即可：

import os,sys

import json

import pymysql

 

def get_m_json(filepath,key,value):

    key_ = key.split(".")

    key_length = len(key_)

    with open(filepath, 'r') as f:

        json_data = json.load(f)

        i = 0

        a = json_data

        while i < key_length :

            if i+1 == key_length :

                a[key_[i]] = "slave:slave@(172.17.40.110:3306)/" + value

                i = i + 1

            else :

                a = a[key_[i]]

                i = i + 1

    f.close()

    return json_data

 

def get_s_json(filepath,key,value):

    key_ = key.split(".")

    key_length = len(key_)

    with open(filepath, 'r') as f:

        json_data = json.load(f)

        i = 0

        a = json_data

        while i < key_length :

            if i+1 == key_length :

                a[key_[i]] = "slave:slave@(172.17.40.148:3306)/" + value

                i = i + 1

            else :

                a = a[key_[i]]

                i = i + 1

    f.close()

    return json_data

 

def rewrite_json_file(filepath,json_data):

    with open(filepath, 'w') as f:

        json.dump(json_data,f)

    f.close()

 

if __name__ == '__main__':

 

    json_path = "/root/go/src/"

 

    conn = pymysql.connect(host="172.17.40.110", port=3306, user="slave", password="slave", database="information_schema")

    cursor = conn.cursor()

    sql = "select schema_name from schemata where schema_name not in ('mysql','information_schema','performance_schema');"

    cursor.execute(sql)

    m_dbs = cursor.fetchall()

    cursor.close()

    conn.close()

 

    conn = pymysql.connect(host="172.17.40.148", port=3306, user="slave", password="slave", database="information_schema")

    cursor = conn.cursor()

    sql = "select schema_name from schemata where schema_name not in ('mysql','information_schema','performance_schema');"

    cursor.execute(sql)

    s_dbs = cursor.fetchall()

    cursor.close()

    conn.close()

 

    for m_db in m_dbs:

        for s_db in s_dbs:

            if m_db == s_db:

                m_json_data = get_m_json(json_path,"source",m_db[0])

                rewrite_json_file(json_path,m_json_data)

                s_json_data = get_s_json(json_path,"dest",m_db[0])

                rewrite_json_file(json_path,s_json_data)

                os.system('mysql-schema-sync -conf /root/go/src/ 2>/dev/null >db_alter.sql')

                break