saltstack通过jinja模板,将变量值增加到配置文件中?通过引用变量值修改配置文件?

时间:2021-11-10 19:05:19

需求描述

  在使用saltstack的时候,有的时候,需要根据不同的变量来增加配置,比如,bind,监听端口,这些都可以通过变量写入,并且在配置的时候引用,下面是一个例子,用来演示,如何使用jinja模板,在state模块中使用。

演示

1.编写sls及saltstack的状态文件

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 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: #监控,如果httpd的配置文件发生了变化,那么就对httpd服务进行reload操作。
      - file: apache-config
mysql-service:
  service.running:
    - name: mysqld
    - enable: True
    - reload: True

备注:该sls状态文件的主要作用就是,安装LAMP的环境,并且启动具体的服务。

2.将httpd的配置文件作为模板文件,sls中写入变量

apache-config:
file.managed:
- name: /etc/httpd/conf/httpd.conf
- source: salt://lamp/files/httpd.conf
- user: root
- group: root
- mode:
- template: jinja #将httpd.confg文件作为jinja模板文件
- defaults:
Listen_Port: 89 #指定具体的变量,也就是参数,也可以指定多个,在下一行

3.修改原配置文件httpd.conf,加入引用变量

[root@testvm01 lamp]# vi files/httpd.conf  #对以下的文件进行修改。
#Listen 12.34.56.78:
Listen {{ Listen_Port }}

备注:这里的意思,就是配置文件httpd.conf会引用lamp.sls文件中列出的变量值

4.通过state模块,进行配置

[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: 16:14:17.055138
    Duration: 483.099 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: 16:14:17.541277
    Duration: 66.713 ms
     Changes:   
              ----------
              diff:
                  ---
                  +++
                  @@ -133,7 +133,7 @@
                   # prevent Apache from glomming onto all bound IP addresses (0.0.0.0)
                   #
                   #Listen 12.34.56.78:80
                  -Listen 87 #diff命令,检测到监听端口的变化
                  +Listen 89
                   
                   #
                   # Dynamic Shared Object (DSO) Support
----------
          ID: php-config
    Function: file.managed
        Name: /etc/php.ini
      Result: True
     Comment: File /etc/php.ini is in the correct state
     Started: 16:14:17.608216
    Duration: 11.019 ms
     Changes:   
----------
          ID: apache-service
    Function: service.running
        Name: httpd
      Result: True
     Comment: Service reloaded #检测到配置文件发生变化之后,进行了reload操作
     Started: 16:14:17.653648
    Duration: 81.143 ms
     Changes:   
              ----------
              httpd:
                  True
----------
          ID: mysql-service
    Function: service.running
        Name: mysqld
      Result: True
     Comment: The service mysqld is already running
     Started: 16:14:17.735066
    Duration: 96.421 ms
     Changes:    Summary for testvm03
------------
Succeeded: 5 (changed=2)
Failed:    0
------------
Total states run:     5
Total run time: 738.395 ms

5.检查testvm03主机上的配置文件的状态和服务状态

[root@testvm03 ~]# grep ^Listen /etc/httpd/conf/httpd.conf
Listen 89
[root@testvm03 ~]# service httpd status
httpd (pid  1139) is running...
[root@testvm03 ~]# netstat -ntlp | grep httpd
tcp        0      0 :::89                       :::*                        LISTEN      1139/httpd

备注:发现配置文件已经修改过来了,并且配置文件也进行了重新加载。达到了,通过引用变量的方法获取变量值来修改配置的方法,httpd.conf中不在是固定的写法,而是通过变量的值来获取某个值。

文档创建时间:2019年3月11日16:18:17