问题描述：
通过saltstack的jinja模板方式，可以将变量的值写入到配置文件，即动态获取的方式。这里介绍，通过执行salt函数来获取值的方式。
演示：
1.通过在sls中，增加jinja的模板信息，变量信息，通过salt函数获取该值。
apache-config:
file.managed:
- name: /etc/httpd/conf/httpd.conf
- source: salt://lamp/files/httpd.conf
- user: root
- group: root
- mode:
- template: jinja
- defaults:
Listen_Port:
OS: {{ grains['os'] }}
HW_ADDR: {{ salt['network.hw_addr']('eth1') }}
2.修改配置文件httpd.conf，增加引用变量HW_ADDR
# Hard Addr is {{ HW_ADDR }} #应用变量的值。
3.执行状态模块，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: ::54.896384
Duration: 484.232 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: ::55.383683
Duration: 67.694 ms
Changes:
----------
diff:
---
+++
@@ -, +, @@
# for a discussion of each configuration directive.
#
# OS is RedHat
-# Hard Addr is :::7c:9c:2d
+# Hard Addr is :::f1:2e:e9 #获取到了网卡的信息，并且增加到该配置文件中
# 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: ::55.451548
Duration: 11.319 ms
Changes:
----------
ID: apache-service
Function: service.running #检测到配置文件发生了变化，就reload配置文件
Name: httpd
Result: True
Comment: Service reloaded
Started: ::55.498927
Duration: 82.003 ms
Changes:
----------
httpd:
True
----------
ID: mysql-service
Function: service.running
Name: mysqld
Result: True
Comment: The service mysqld is already running
Started: ::55.581261
Duration: 106.275 ms
Changes: Summary for testvm03
------------
Succeeded: (changed=)
Failed:
------------
Total states run:
Total run time: 751.523 ms
jinja中调用salt函数的语法：
# The following two function calls are equivalent.
{{ salt['cmd.run']('whoami') }}
{{ salt.cmd.run('whoami') }}
注意：第一中写法，参数要有括号，并且用单引号，否则会报错。
文档创建时间：2019年3月11日17:10:01