ansible jinja2模板概述

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ansible允许jinja2模板中使用条件判断和循环，但是不允许在playbook中使用

{{ EXPR }}输出变量值，会输出自定义的变量值或facts 1)playbook文件使用template模块 2)模板文件里面变量使用{{名称}}，比如{{PORT}}或使用facts

#循环表达式 {% for i in EXPR %} {% endfor %}  #条件判断 {% if EXPR %} {% elif EXPR %} {% else %} {% ednif %}  #注释 {# COMMENT #}

编辑playbook

[root@m01 ~]# vim jinja2.yml - hosts: web_group   tasks:     - name: Copy Template File       template:         src: ./motd.j2         dest: /etc/motd

准备motd.j2

[root@m01 ~]# vim motd.j2 Welcome to {{ ansible_fqdn }} This system total mem is : {{ ansible_memtotal_mb }} MB This system free mem is: {{ ansible_memfree_mb }} MB

执行playbook

1.编辑playbook

[root@m01 ~]# vim lb.yml - hosts: lb_group   vars:     http_port: 80     server_name: www.drz.com   tasks:     - name: copy       template:         src: ./www.drz.com.conf.j2         dest: /etc/nginx/conf.d/www.drz.com.conf       notify: reload nginx   handlers:     - name: reload nginx       systemd:         name: nginx         state: reloaded

2.准备配置文件

[root@m01 ~]# vim lb.yml - hosts: lb_group   vars:     http_port: 80     server_name: www.drz.com   tasks:     - name: copy       template:         src: ./www.drz.com.conf.j2         dest: /etc/nginx/conf.d/www.drz.com.conf       notify: reload nginx   handlers:     - name: reload nginx       systemd:         name: nginx         state: reloaded

#keepalived master 配置文件 global_defs {     router_id lb01 }  vrrp_instance VI_1 {     state MASTER     interface eth0     virtual_router_id 50     priority 150     advert_int 1     authentication {         auth_type PASS         auth_pass 1111     }     virtual_ipaddress {                  10.0.0.3     } }   #keepalived backup配置文件 global_defs {     router_id lb02 }  vrrp_instance VI_1 {     state BACKUP             interface eth0     virtual_router_id 50     priority 100     advert_int 1     authentication {             auth_type PASS         auth_pass 1111     }     virtual_ipaddress {         10.0.0.3     } }

[root@m01 ~]# vim keepalived.yml - hosts: lb_group   tasks:     - name: copy file       template:         src: ./keepalived.j2         dest: /etc/keepalived/keepalived.conf       notify: restart keepalived    handlers:     - name: restart keepalived       systemd:         name: keepalived         state: restarted

[root@m01 ~]# vim keepalived.j2 global_defs {     router_id {{ ansible_fqdn }} }  vrrp_instance VI_1 { {% if ansible_fqdn == "lb01" %}     state MASTER     priority 150 {% else %}     state BACKUP     priority 100 {% endif %}      interface eth0     virtual_router_id 50     advert_int 1     authentication {         auth_type PASS         auth_pass 1111     }     virtual_ipaddress {                  10.0.0.3     } }

来源：博客园

作者：1naonao

链接：https://www.cnblogs.com/1naonao/p/11575271.html

标签

jinja2

ansible

playbook

keepalived