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