https://blog.liuts.com/index.php zh-cn https://blog.liuts.com/post/240/ 刘天斯 <liutiansi@gmail.com> Mon, 26 Aug 2013 14:39:32 +0000 https://blog.liuts.com/post/240/ 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，见下图：
    

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
    2、定义的文件树结构（具体文件后续说明）


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
2)同步grains模块
salt '*' saltutil.sync_all

3)刷新模块(让minion编译模块)
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

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
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
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

五、配置States
1）定义入口top.sls
#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
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
3）Nginx配置文件（引用jinja模板）
功能点：
1、worker_processes参数采用grains['num_cpus'] 上报值（与设备CPU核数一致）；
2、worker_cpu_affinity分配多核CPU根据当前设备核数进行匹配，分别为2\4\8\其它核；
3、worker_rlimit_nofile参数与grains['max_open_file'] 获取的系统ulimit -n一致；
4、worker_connections 参数理论上为grains['max_open_file']；
5、 root参数为定制的pillar['nginx']['root']值。
#vi /srv/salt/nginx/nginx.conf
# For more information on configuration, see: user              nginx; worker_processes  {{ grains['num_cpus'] }}; {% if grains['num_cpus'] == 2 %} worker_cpu_affinity 01 10; {% elif grains['num_cpus'] == 4 %} worker_cpu_affinity 1000 0100 0010 0001; {% elif grains['num_cpus'] >= 8 %} worker_cpu_affinity 00000001 00000010 00000100 00001000 00010000 00100000 01000000 10000000; {% else %} worker_cpu_affinity 1000 0100 0010 0001; {% endif %} worker_rlimit_nofile {{ grains['max_open_file'] }}; error_log  /var/log/nginx/error.log; #error_log  /var/log/nginx/error.log  notice; #error_log  /var/log/nginx/error.log  info; pid        /var/run/nginx.pid; events {     worker_connections  {{ grains['max_open_file'] }}; } http {     include       /etc/nginx/mime.types;     default_type  application/octet-stream;     log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '                       '$status $body_bytes_sent "$http_referer" '                       '"$http_user_agent" "$http_x_forwarded_for"';     access_log  /var/log/nginx/access.log  main;     sendfile        on;     #tcp_nopush     on;     #keepalive_timeout  0;     keepalive_timeout  65;     #gzip  on;          # Load config files from the /etc/nginx/conf.d directory     # The default server is in conf.d/default.conf     #include /etc/nginx/conf.d/*.conf;     server {         listen       80 default_server;         server_name  _;         #charset koi8-r;         #access_log  logs/host.access.log  main;         location / {             root   {{ pillar['nginx']['root'] }};             index  index.html index.htm;         }         error_page  404              /404.html;         location = /404.html {             root   /usr/share/nginx/html;         }         # redirect server error pages to the static page /50x.html         #         error_page   500 502 503 504  /50x.html;         location = /50x.html {             root   /usr/share/nginx/html;         }     } }
4)同步配置
#salt '*' state.highstate

（由于非第一次运行，看不到配置文件比对的信息）

5）验证结果：
1、登录root@SN2013-08-021
#vi /etc/nginx/nginx.conf





2、登录root@SN2012-07-010
#vi /etc/nginx/nginx.conf




Tags - saltstack , salt , 运维 , 自动化 ]]> https://blog.liuts.com/post/240/#blogcomment2411 chenqing <chenqing663@foxmail.com> Wed, 04 Sep 2013 04:59:41 +0000 https://blog.liuts.com/post/240/#blogcomment2411 https://blog.liuts.com/post/240/#blogcomment2424 北南 <user@domain.com> Thu, 05 Sep 2013 08:46:21 +0000 https://blog.liuts.com/post/240/#blogcomment2424 https://blog.liuts.com/post/240/#blogcomment2430 藤家具 <user@domain.com> Tue, 24 Sep 2013 09:25:06 +0000 https://blog.liuts.com/post/240/#blogcomment2430 https://blog.liuts.com/post/240/#blogcomment2432 一路狂飙 <ne09@qq.com> Mon, 14 Oct 2013 01:18:32 +0000 https://blog.liuts.com/post/240/#blogcomment2432 https://blog.liuts.com/post/240/#blogcomment2433 张伟 <potaski@qq.com> Wed, 23 Oct 2013 07:52:16 +0000 https://blog.liuts.com/post/240/#blogcomment2433 https://blog.liuts.com/post/240/#blogcomment2438 ran <user@domain.com> Fri, 21 Feb 2014 06:31:26 +0000 https://blog.liuts.com/post/240/#blogcomment2438 https://blog.liuts.com/post/240/#blogcomment2449 胶水 <cc@12.com> Mon, 21 Jul 2014 08:10:07 +0000 https://blog.liuts.com/post/240/#blogcomment2449 https://blog.liuts.com/post/240/#blogcomment2452 园林假山 <user@domain.com> Thu, 24 Jul 2014 00:44:43 +0000 https://blog.liuts.com/post/240/#blogcomment2452 https://blog.liuts.com/post/240/#blogcomment2453 变压器 <user@domain.com> Sun, 27 Jul 2014 12:50:24 +0000 https://blog.liuts.com/post/240/#blogcomment2453 https://blog.liuts.com/post/240/#blogcomment2470 网游加速器 <user@domain.com> Sun, 17 Aug 2014 08:55:00 +0000 https://blog.liuts.com/post/240/#blogcomment2470