基于saltstack实现的配置集中化管理
Saltstack是一个具备puppet与func功能为一身的集中化管理平台，saltstack基于python实现，功能十分强大，各模块融合度及复用性极高，官方极力推荐作为云计算平台的基础架构。轻松维护成千上万台服务器不是问题，现分享作者基于saltstack实现一个集中化的配置管理平台，以Nginx配置例子展开，涉及salt的grains、grains_module、pillar、States、jinja（template）等，本文适合有salt基础的同学阅读。 一、设备环境说明 有两组web业务服务器，组名分别为web1group与web2group，设备硬件配置、web根目录存在异常. id groupsnode cpus webroot SN2012-07-010 web1group 2 /www SN2012-07-011 web1group 4 /www SN2012-07-012 web1group 2 /www SN2013-08-021 web2group 2 /data SN2013-08-022 web2group 2 /data id groupsnode cpus webroot SN2012-07-010 web1group 2 /www SN2012-07-011 web1group 4 /www SN2012-07-012 web1group 2 /www SN2013-08-021 web2group 2 /data SN2013-08-022 web2group 2 /data 二、master配置说明 1、关键配置定义： nodegroups: web1group: 'L@SN2012-07-010，SN2012-07-011，SN2012-07-012' web2group: 'L@SN2013-08-021，SN2013-08-022' file_roots: base: - /srv/salt pillar_roots: base: - /srv/pillar nodegroups: web1group: 'L@SN2012-07-010，SN2012-07-011，SN2012-07-012' web2group: 'L@SN2013-08-021，SN2013-08-022' file_roots: base: - /srv/salt pillar_roots: base: - /srv/pillar 2、定义的文件树结构
三、自定义grains_module 1）#vi /srv/salt/_grains/nginx_config.py import os，sys，commands def NginxGrains(): ''' return Nginx config grains value ''' grains = {} max_open_file=65536 #Worker_info={'cpus2':'01 10'，'cpus4':'1000 0100 0010 0001'，'cpus8':'10000000 01000000 00100000 00010000 00001000 00000100 00000010 00000001'} try: getulimit=commands.getstatusoutput('source /etc/profile;ulimit -n') except Exception，e: pass if getulimit[0]==0: max_open_file=int(getulimit[1]) grains['max_open_file'] = max_open_file return grains import os，sys，commands def NginxGrains(): ''' return Nginx config grains value ''' grains = {} max_open_file=65536 #Worker_info={'cpus2':'01 10'，'cpus4':'1000 0100 0010 0001'，'cpus8':'10000000 01000000 00100000 00010000 00001000 00000100 00000010 00000001'} try: getulimit=commands.getstatusoutput('source /etc/profile;ulimit -n') except Exception，e: pass if getulimit[0]==0: max_open_file=int(getulimit[1]) grains['max_open_file'] = max_open_file return grains 2)同步grains模块 # salt '*' saltutil.sync_all 1 # salt '*' saltutil.sync_all 3)刷新模块(让minion编译模块) # salt '*' sys.reload_modules 1 # salt '*' sys.reload_modules 4)验证max_open_file key的value [root@SN2013-08-020 _grains]# salt '*' grains.item max_open_file SN2013-08-022: max_open_file: 1024 SN2013-08-021: max_open_file: 1024 SN2012-07-011: max_open_file: 1024 SN2012-07-012: max_open_file: 1024 SN2012-07-010: max_open_file: 1024 [root@SN2013-08-020 _grains]# salt '*' grains.item max_open_file SN2013-08-022: max_open_file: 1024 SN2013-08-021: max_open_file: 1024 SN2012-07-011: max_open_file: 1024 SN2012-07-012: max_open_file: 1024 SN2012-07-010: max_open_file: 1024 四、配置pillar 本例使用分组规则定义pillar，即不同分组引用各自的sls属性 1)定义入口top.sls #vi /srv/pillar/top.sls base: web1group: - match: nodegroup - web1server web2group: - match: nodegroup - web2server base: web1group: - match: nodegroup - web1server web2group: - match: nodegroup - web2server 2)定义私有配置，本例只配置web_root的数据，当然可以根据不同需求进行定制，格式为python的字典形式，即"key:value"。 #vi /srv/pillar/web1server.sls nginx: root: /www #vi /srv/pillar/web2server.sls nginx: root: /data #vi /srv/pillar/web1server.sls nginx: root: /www #vi /srv/pillar/web2server.sls nginx: root: /data 3）验证配置结果： #salt 'SN2013-08-021' pillar.data nginx SN2013-08-021: ---------- root: /data #salt 'SN2012-07-010' pillar.data nginx SN2012-07-010: ---------- root: /www #salt 'SN2013-08-021' pillar.data nginx SN2013-08-021: ---------- root: /data #salt 'SN2012-07-010' pillar.data nginx SN2012-07-010: ---------- root: /www 五、配置States 1）定义入口top.sls #vi /srv/salt/top.sls base: '*': - nginx 1 2 3 4 #vi /srv/salt/top.sls base: '*': - nginx 2)定义nginx配置及重启服务SLS，其中salt://nginx/nginx.conf为配置模板文件位置。 #vi /srv/salt/nginx.sls view plainprint? nginx: pkg: - installed file.managed: - source: salt://nginx/nginx.conf - name: /etc/nginx/nginx.conf - user: root - group: root - mode: 644 - template: jinja service.running: - enable: True - reload: True - watch: - file: /etc/nginx/nginx.conf - pkg: nginx #vi /srv/salt/nginx.sls view plainprint? nginx: pkg: - installed file.managed: - source: salt://nginx/nginx.conf - name: /etc/nginx/nginx.conf - user: root - group: root - mode: 644 - template: jinja service.running: - enable: True - reload: True - watch: - file: /etc/nginx/nginx.conf - pkg: nginx
