使用py-mysql2pgsql 简单实现mysql数据库迁移到pgsql

参考：https://pypi.python.org/pypi/py-mysql2pgsql

公司的有个项目，原先用的是MySQL数据库，现在要改成postgres。 于是搜了下，找到个py-mysql2pgsql工具。下面是笔记：

假设我们要把本机的mysql里面的gitlab_ci_production、gitlabhq_production 这2个库导入到本机的pgsql中（本地地址:192.168.2.100）。

1、安装pgsql10

yum install https://download.postgresql.org/pub/repos/yum/10/redhat/rhel-6-x86_64/pgdg-centos10-10-1.noarch.rpm

yum install postgresql10 postgresql10-server

yum install  postgresql10-devel

service postgresql-10 initdb

chkconfig postgresql-10 on

service postgresql-10 start

修改绑定地址

vim /var/lib/pgsql/10/data/postgresql.conf

listen_addresses = '*'

添加客户端IP放行(生产环境不建议放行0.0.0.0/0 范围太大了)

vim pg_hba.conf  

host    all    all   0.0.0.0/0    md5

/etc/init.d/postgresql-10 restart

2、在pgsql里面创建用户及相关的库：

su - postgres

psql

create user gitlab with password '123456' ;

create database gitlab_ci_production;

create database gitlabhq_production;

alter database gitlab_ci_production owner  to gitlab;

alter database gitlabhq_production owner  to gitlab;

echo "export PATH=/usr/pgsql-10/bin/:$PATH" >> /etc/profile

source /etc/profile

3、安装py-mysql2pgsql

pip install py-mysql2pgsql 

4、编写导出文件的yml，如下：

[root@localhost ~]# cat convert.yml  内容如下：

# if a socket is specified we will use that

# if tcp is chosen you can use compression

mysql:

hostname: localhost

port: 3306

socket: /tmp/mysql.sock

username: root

password: 123456

database: gitlab_ci_production

compress: false

destination:

# if file is given, output goes to file, else postgres

file:

postgres:

  hostname: 192.168.2.100

  port: 5432

  username: gitlab

  password: 123456

  database: gitlab_ci_production

[root@localhost ~]# cat convert2.yml   内容如下：

# if a socket is specified we will use that 

# if tcp is chosen you can use compression

mysql:

hostname: localhost

port: 3306

socket: /tmp/mysql.sock

username: root

password: 123456

database: gitlabhq_production

compress: false

destination:

# if file is given, output goes to file, else postgres

file:

postgres:

  hostname: 192.168.2.100

  port: 5432

  username: gitlab

  password: 123456

  database: gitlabhq_production

5、执行导入数据的命令：

py-mysql2pgsql -v -f convert.yml

py-mysql2pgsql -v -f convert2.yml

6、稍后去pgsql下验证下数据是否正常

具体参考：https://pypi.python.org/pypi/py-mysql2pgsql