源码包：http://pan.baidu.com/s/1mgic8U8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 yamlimport osdef 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#coding: utf-8import subprocessclass MY_ERROR(Exception): def __init__(self,value): self.value=value def __str__(self): return self.valuedef 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.slsmysql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.gztar -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 osdef 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.slsmysql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。
