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saltstack应用之批量部署mysql

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源码包 http://pan.baidu.com/s/1eQzPJB8

应用环境:

使用salt写了个自动部署mysql的配置配置管理文件,由于mysql的有版本号,端口等不确定属性,需要使用pillar来单独配置每个minion的属性。

一,原始方法

例如,需要在salt id为10.1.1.1-centos.game.web的服务器上部署mysql,版本号为5.5.25,实例有3个,3306,3307,3308, 正常情况下的流程是这样的:

1,在/srv/salt/top.sls中添加配置信息,确保mysql对应的配置被加载

base:
  10.1.1.1-centos.game.web:
    - centos.public_services.mysql

2,在/srv/pillar/top.sls配置minion对应的sls文件位置(ps:salt文件中不能再带”.”,否则会报错)

base:
  10.1.1.1-centos.game.web:
    - custom.10-1-1-1-centos-game-web

3,新建/srv/pillar/custom/10-1-1-1-centos-game-web.sls,内容如下:

mysql:
  ports:
    - 3306
    - 3307
    - 3308
  version:  '5_5_25'

4,执行同步命令

salt 10.1.1.1-centos.game.web -v -t 300

二,改进方法
oh,shit,说好的自动化呢,怎么还要这么多步骤,这可不行!
利用py模式的sls配置文件(其实就是python脚本,只要返回yaml格式的字典文件就好了),我们可以将以上的操作简化成1步,思路如下:
1,/srv/pillar/top.sls中编写配置:

base:
 '*':
 - custom

2,使用py模式编写/srv/pillar/custom/init.sls,自动读取pillar配置,例如salt id是:10.1.1.1-centos.game.web,那么project为game,然后根据获取的pillar_root组合成路径/srv/pillar/custom/game/10.1.1.1-centos.game.web.yaml,利用yaml模块从文件中读取信息,返回字典
3,在/srv/salt/top.sls文件中匹配所有的minion

‘*’:
  - centos.public_services

4,/srv/salt/centos/public_services/init.sls文件使用py模式编写,配置会获取对应的minion的pillar信息,如果包含mysql配置信息且配置正确的话,则返回mysql实例的配置。

那现在要怎么使用呢,很简单,例如你的id为10.1.1.1-centos.game.web,首先在/srv/pillar/custom/目录下建个game目录(从salt id获取的项目名),然后在game目录先新建文件10.1.1.1-centos.game.web.yaml,里面写上配置信息:

mysql:
  ports:
    - 3306
    - 3307
    - 3308
  version:  '5_5_25'

最后执行命令:
salt 10.1.1.1-centos.game.web -v -t 300

静静的等待执行完成就好了!

三,具体代码

/srv/pillar/custom/init.sls

#!py
#coding:utf-8
"""
返回minion对应的pillar信息
"""
import yaml
import os

def run():
  """
  首先获取请求的id,从id中获取project,例如id是:1.2.3.4-centos.game.web,那么project为game
  然后根据获取的pillar_root组合成路径/srv/pillar/custom/game/1.2.3.4-centos.game.web.yaml,利用yaml模块从文件中读取信息,返回字典
  """
  config={}
  id=__opts__['id']
  open('/tmp/test.log','w').write(os.getcwd())
  project=id.split('-')[-1].split('.')[1]
  pillar_root=__opts__['pillar_roots']['base'][0]
  path='%s/custom/%s/%s.yaml'%(pillar_root,project,id)
  if os.path.isfile(path):
    s=open(path).read()
    config=yaml.load(s)
  return config

/srv/salt/centos/public_services/init.sls

#!py
#!py
#coding: utf-8
import subprocess

class MY_ERROR(Exception):
  def __init__(self,value):
    self.value=value

  def __str__(self):
    return self.value

def mysql():
  """
  1,检查是minion中pillar是否有mysql参数,以及参数是否合法
  如果参数没有问题,则返回对应版本的include配置

  pillar e.q.
  mysql:
    ports:
      - 3306
      - 3307
    version: '5_5_25'
  """
  mysql_sls_path='centos.public_services.mysql.'
  #必要的参数
  required_keys=['version','ports']

  if __pillar__.has_key('mysql'):
    mysql_d=__pillar__['mysql']
    #不存在必要的键值对则返回None
    for key in required_keys:
      if not mysql_d.has_key(key) or str(mysql_d[key]).strip()=="":
        raise MY_ERROR('key error! key: %s'%(str(key)))

    #判断port是否合法
    for port in mysql_d['ports']:
      if not port or not 1024<int(port)

/srv/salt/centos/public_services/mysql/5/init.sls

include:
  - centos.public_services.mysql.5.packet
  - centos.public_services.mysql.5.my_cnf
  - centos.public_services.mysql.5.instance

/srv/salt/centos/public_services/mysql/5/packet.sls
mysql软件包要放到相应的目录中,具体位置参考下面配置

{%set version=pillar['mysql']['version']%}
{%set version=pillar['mysql']['version']%}
mysql:
  user.present:
    - home: /home/mysql
    - shell: /sbin/nologin

/usr/local/nagios/libexec/check_safe -u:
  cmd.wait:
    - watch:
      - user: mysql

/usr/local/src/mysql-{{version.replace('_','.')}}.tar.gz:
  file.managed:
    - source: salt://centos/public_services/mysql/5/{{version}}/mysql-{{version.replace('_','.')}}.tar.gz

tar -xf mysql-{{version.replace('_','.')}}.tar.gz -C /usr/local/:
  cmd.run:
    - cwd: /usr/local/src
    - unless: ls -l /usr/local/ | grep -e ".* mysql-{{version.replace('_','.')}}$"

/usr/local/mysql-{{version.replace('_','.')}}:
  file.directory:
    - user: mysql
    - group: mysql
    - recurse:
      - user
      - group

/data/mysql_log:
  file.directory:
    - makedirs: True
    - user: mysql
    - group: mysql
    - recurse:
      - user
      - group

/data/log-bin:
  file.directory:
    - makedirs: True
    - user: mysql
    - group: mysql
    - recurse:
      - user
      - group

/usr/bin/mysql:
  file.symlink:
    - target: /usr/local/mysql-{{version.replace('_','.')}}/bin/mysql
    - unless: ls -l /usr/bin | grep -e " mysql$"

/srv/salt/centos/public_services/mysql/5/my_cnf.sls
注意修改最后的初始化密码
my.cnf配置文件需要放到对应的目录中,my.cnf文件中要设置对应的模板变量:

port= {{port}} #还有其它的和端口相关的配置都要改成{{port}}
 basedir=/usr/local/mysql-{{version}} #还有其它的和版本相关的配置都要改成{{version}}
#!py
#!py
#coding:utf-8
"""
生成my.cnf配置文件,如果文件已存在,不作任何修改
"""
import os

def run():
  config={}
  version=__pillar__['mysql']['version']
  for port in __pillar__['mysql']['ports']:
    port=str(port)
    if not os.path.isfile('/data/mysql_data_%s/my.cnf'%(port)):
      config['/data/mysql_data_%s/my.cnf'%(port)]={
        'file.managed':[
          {'source':'salt://centos/public_services/mysql/5/%s/my.cnf'%(version)},
          {'template':'jinja'},
          {'context':{'port':port,'version':'%s'%(version.replace('_','.'))}},
          {'require':[{'file':'/data/mysql_data_%s'%(port)}]},
          ],
      }
      config['chown mysql.mysql /data/mysql_data_%s/my.cnf'%(port)]='cmd.run'

  return config

/srv/salt/centos/public_services/mysql/5/instance.sls
mysql启动脚本需要放到对应的目录中,启动脚本中要设置对应的模板变量:

basedir=/usr/local/mysql-{{version}} #还有其它的和版本相关的配置都要改成{{version}}
 datadir=/data/mysql_data_{{port}} #还有其它的和端口相关的配置都要改成{{port}}
{% for port in pillar['mysql']['ports'] %}
{% for port in pillar['mysql']['ports'] %}

/data/mysql_data_{{port}}:
  file.directory:
    - makedirs: True
    - user: mysql
    - group: mysql
    - recurse:
      - user
      - group

/etc/init.d/mysqld_{{port}}:
  file.managed:
    - source: salt://centos/public_services/mysql/5/{{pillar['mysql']['version']}}/mysql.service
    - user: root
    - group: root
    - mode: 755
    - template: jinja
    - context:
      port: {{port}}
      version: {{pillar['mysql']['version'].replace('_','.')}}

chkconfig --add mysqld_{{port}};chkconfig --level 345 mysqld_{{port}} on;:
  cmd.run:
    - unless: chkconfig --list | grep mysqld_{{port}}

#初始化库
init_mysql_{{port}}:
  cmd.run:
    - name: /usr/local/mysql-{{pillar['mysql']['version'].replace('_','.')}}/scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql-{{pillar['mysql']['version'].replace('_','.')}}  --datadir=/data/mysql_data_{{port}}/
    - unless: ls -l /data/mysql_data_{{port}} | grep -e ".* mysql$"

/etc/init.d/mysqld_{{port}} start:
  cmd.wait:
    - watch:
      - cmd: init_mysql_{{port}}

/usr/local/mysql-{{pillar['mysql']['version'].replace('_','.')}}/bin/mysqladmin -uroot -S /tmp/mysql_{{port}}.sock password 'yourmysqlpasswd!':
  cmd.wait:
    - watch:
      - cmd: init_mysql_{{port}}

{%endfor%}

四,总结
这个方法不仅可以用在mysql,同样的nginx,redis等都可以举一反三,配置文件编写完成后,仅仅需要简单的在pillar中添加几个变量就可以轻松批量部署了。

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