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
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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)
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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:
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mysql: ports: -3306 -3307 -3308 version: '5_5_25' |
4,执行同步命令
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salt 10.1.1.1-centos.game.web state.highstate-v-t300 |
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:
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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
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‘*’: -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:
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mysql: ports: -3306 -3307 -3308 version: '5_5_25'
最后执行命令: |
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salt 10.1.1.1-centos.game.web state.highstate-v-t300 |
静静的等待执行完成就好了!
三,具体代码
/srv/pillar/custom/init.sls
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#!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) ifos.path.isfile(path): s=open(path).read() config=yaml.load(s) returnconfig |
/srv/salt/centos/public_services/init.sls
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#!py #coding: utf-8 import subprocess
classMY_ERROR(Exception): def __init__(self,value): self.value=value def __str__(self): returnself.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 forkey inrequired_keys: ifnotmysql_d.has_key(key)orstr(mysql_d[key]).strip()=="": raise MY_ERROR('key error! key: %s'%(str(key))) #判断port是否合法 forport inmysql_d['ports']: ifnotport ornot1024<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]) returncfg returnNone
def run(): config={} config['include']=[] #mysql mysql_cfg=mysql() ifmysql_cfg: config['include'].append(mysql_cfg) ifconfig['include']==[]: return{} returnconfig |
/srv/salt/centos/public_services/mysql/5/init.sls
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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
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{%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-xfmysql-{{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:
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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}} |
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#!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'] forport in__pillar__['mysql']['ports']: port=str(port) ifnotos.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'
returnconfig |
/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:
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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}} |
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{%forport inpillar['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--addmysqld_{{port}};chkconfig--level345mysqld_{{port}}on;: cmd.run: -unless:chkconfig--list|grepmysqld_{{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。
本文转自:https://blog.csdn.net/xiefangjin/article/details/51226566