saltstack通过jinja模板，grains方式将配置的变量值写入到配置文件中？

需求描述：

　　在通过saltstack进行jinja模板获取值的时候，可以通过grains的方式，获取一些操作系统相关的信息，比如，OS，ip地址等，在这里演示下，做个记录。

演示：

1.修改sls文件，增加jinja模板，选项

[root@testvm01 lamp]# cat lamp.sls 
lamp-pkgs:
  pkg.installed:
    - pkgs:
      - httpd
      - php
      - mysql
      - mysql-server
      - php-mysql
      - php-cli
      - php-mbstring

apache-config:
  file.managed:
    - name: /etc/httpd/conf/httpd.conf
    - source: salt://lamp/files/httpd.conf
    - user: root
    - group: root
    - mode: 644
    - template: jinja
    - defaults:
      Listen_Port: 86
      OS: {{ grains['os'] }}   #通过grains的方式获取os的值

php-config:
  file.managed:
    - name: /etc/php.ini
    - source: salt://lamp/files/php.ini
    - user: root
    - group: root
    - mode: 644

apache-service:
  service.running:
    - name: httpd
    - enable: True
    - reload: True
    - watch:
      - file: apache-config
mysql-service:
  service.running:
    - name: mysqld
    - enable: True
    - reload: True

2.修改httpd配置文件，应用这个变量值

#
# OS is {{ OS }}  #在httpd.conf配置文件中，增加个注释，为了演示是否可以获取该变量值

3.执行state模块

[root@testvm01 lamp]# salt 'testvm03' state.sls lamp.lamp
testvm03:
----------
          ID: lamp-pkgs
    Function: pkg.installed
      Result: True
     Comment: All specified packages are already installed
     Started: 16:41:23.280481
    Duration: 483.52 ms
     Changes:   
----------
          ID: apache-config
    Function: file.managed
        Name: /etc/httpd/conf/httpd.conf
      Result: True
     Comment: File /etc/httpd/conf/httpd.conf updated
     Started: 16:41:23.767025
    Duration: 78.04 ms
     Changes:   
              ----------
              diff:
                  --- 
                  +++ 
                  @@ -6,7 +6,7 @@
                   # <URL:http://httpd.apache.org/docs/2.2/mod/directives.html>
                   # for a discussion of each configuration directive.
                   #
                  -#
                  +# OS is RedHat   #通过这个部分看，已经获取到grains中os的值
                   # Do NOT simply read the instructions in here without understanding
                   # what they do.  They're here only as hints or reminders.  If you are unsure
                   # consult the online docs. You have been warned.  
----------
          ID: php-config
    Function: file.managed
        Name: /etc/php.ini
      Result: True
     Comment: File /etc/php.ini is in the correct state
     Started: 16:41:23.845276
    Duration: 12.077 ms
     Changes:   
----------
          ID: apache-service
    Function: service.running
        Name: httpd
      Result: True
     Comment: Service reloaded
     Started: 16:41:23.893749
    Duration: 81.956 ms
     Changes:   
              ----------
              httpd:
                  True
----------
          ID: mysql-service
    Function: service.running
        Name: mysqld
      Result: True
     Comment: The service mysqld is already running
     Started: 16:41:23.976028
    Duration: 113.57 ms
     Changes:   

Summary for testvm03
------------
Succeeded: 5 (changed=2)
Failed:    0
------------
Total states run:     5
Total run time: 769.163 ms

备注：并且在watch的监控下，发现配置文件有变化，也执行了httpd服务的重启。这样，就完成了，通过grains的方法获取某些值，然后将这些值放入到配置文件中。

文档创建时间：2019年3月11日16:43:21