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基于saltstack实现的配置集中化管理

salt / 自动化 admin 2浏览

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

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

salt
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
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

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

5)验证结果:
注意查看root定义值和worker_processes值。
1、登录root@SN2013-08-021

#vi /etc/nginx/nginx.conf

2、登录root@SN2012-07-010

#vi /etc/nginx/nginx.conf

转载请注明:爱开源 » 基于saltstack实现的配置集中化管理

转载请注明:爱开源 » 基于saltstack实现的配置集中化管理