saltstack应用之批量部署mysql

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 state.highstate -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 state.highstate -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']
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
#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)<65535:
raise MY_ERROR('mysql ports value error: %s'%(str(mysql_d['ports'])))
#组合配置参数
cfg=mysql_sls_path+str(mysql_d['version'][0])
return cfg
return None

def run():
config={}
config['include']=[]
#mysql
mysql_cfg=mysql()
if mysql_cfg:
config['include'].append(mysql_cfg)
if config['include']==[]:
return {}
return config
/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']%}
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
#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'] %}

/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。
https://www.ttlsa.com/saltstack/saltstack-mysql/