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 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