笔记 | Ansible

### Jinja2 filter
#### 使用 jinja2 模版
Ansible 和 SaltStack 这两个配置管理工具默认都把 jinja2 当作默认的模版语言
Ansible 默认支持 jinja2 语言的内置 filter

```yaml
---
- hosts: all
  gather_facts: False

vars:
    list: [1, 2, 3, 4]
    one: "1"
    str: "string"

tasks:
    - name: run commands
      shell:
        cmd: df -h
      register: info

- name: debug print filter
      debug:
        # 对 info.stdout 结果使用 pprint 进行格式化
        msg: "{{ info.stdout | pprint }}"

- name: debug conditionals filter
      debug:
        msg: "The run commands status is changed"
      when:
        # 对 info 的执行状态使用 changed filter 进行判断
        info.changed

- name: debug int capitalize filter
      debug:
        # 对 one 的值进行 int 转变，然后对 str 的值进行 capitalize 格式化
        msg: "The int value {{ one | int }} The lower value is {{ str | capitalize }}"

- name: debug default filter
      debug:
        # 对 ansible 变量进行判断，如果定义了就引用它的值，如果没有定义就使用 default 内的值
        msg: "The Variable value is {{ ansible | default('ansible is not define') }}"

- name: debug list max and min filter
      debug:
        # 对 list 内的值进行最大值 Max 和 最小值 min 取值
        msg: "The list max value is {{ list | max }} The list min value is {{ list | min }}"

- name: debug ramdom filter
      debug:
        # 对 list 内的值使用 random filter 随机挑选一个，然后随机生成 1000 内的数字，step 是 10
        msg: "The list ramdom value is {{ list | random }} and generate a random value is {{ 1000 | random(1, 10) }}"

- name: debug join filter
      debug:
        # 对 list 内的值使用 join filter 连接在一起
        msg: "The join filter value is {{ list | join('+') }}"

- name: debug replace and regex_replace filter
      debug:
        # 对 str 的值使用 replace 和 regex_replace 替换
        msg: "The replace value is {{ str | replace('t', 'T') }} The regex_replace value is {{ str | regex_replace('.*tr(.*)$', '\\1') }}"
```

执行结果如下

```
$ ansible-playbook -i hosts.ini filter.yaml

PLAY [all] ************************************************************************************************************************************

TASK [run commands] ***************************************************************************************************************************
changed: [clientsrv003]
changed: [clientsrv002]
changed: [clientsrv001]

TASK [debug print filter] *********************************************************************************************************************
ok: [clientsrv001] => {
    "msg": "u'\\u6587\\u4ef6\\u7cfb\\u7edf                 \\u5bb9\\u91cf  \\u5df2\\u7528  \\u53ef\\u7528 \\u5df2\\u7528% \\u6302\\u8f7d\\u70b9\\ndevtmpfs                 899M     0  899M    0% /dev\\ntmpfs                    910M  124K  910M    1% /dev/shm\\ntmpfs                    910M   98M  812M   11% /run\\ntmpfs                    910M     0  910M    0% /sys/fs/cgroup\\n/dev/mapper/centos-root   46G   26G   20G   57% /\\n/dev/sda1               1014M  189M  826M   19% /boot\\ntmpfs                    182M     0  182M    0% /run/user/1000'"
}
ok: [clientsrv003] => {
    "msg": "u'\\u6587\\u4ef6\\u7cfb\\u7edf                 \\u5bb9\\u91cf  \\u5df2\\u7528  \\u53ef\\u7528 \\u5df2\\u7528% \\u6302\\u8f7d\\u70b9\\n/dev/mapper/centos-root   47G  6.9G   41G   15% /\\ndevtmpfs                 475M     0  475M    0% /dev\\ntmpfs                    487M     0  487M    0% /dev/shm\\ntmpfs                    487M   51M  437M   11% /run\\ntmpfs                    487M     0  487M    0% /sys/fs/cgroup\\n/dev/sda1               1014M  133M  882M   14% /boot\\ntmpfs                     98M     0   98M    0% /run/user/0'"
}
ok: [clientsrv002] => {
    "msg": "u'\\u6587\\u4ef6\\u7cfb\\u7edf                 \\u5bb9\\u91cf  \\u5df2\\u7528  \\u53ef\\u7528 \\u5df2\\u7528% \\u6302\\u8f7d\\u70b9\\n/dev/mapper/centos-root   47G   11G   37G   22% /\\ndevtmpfs                 475M     0  475M    0% /dev\\ntmpfs                    487M     0  487M    0% /dev/shm\\ntmpfs                    487M   51M  437M   11% /run\\ntmpfs                    487M     0  487M    0% /sys/fs/cgroup\\n/dev/sda1               1014M  133M  882M   14% /boot\\ntmpfs                     98M     0   98M    0% /run/user/0'"
}

TASK [debug conditionals filter] **************************************************************************************************************
ok: [clientsrv001] => {
    "msg": "The run commands status is changed"
}
ok: [clientsrv002] => {
    "msg": "The run commands status is changed"
}
ok: [clientsrv003] => {
    "msg": "The run commands status is changed"
}

TASK [debug int capitalize filter] ************************************************************************************************************
ok: [clientsrv001] => {
    "msg": "The int value 1 The lower value is String"
}
ok: [clientsrv002] => {
    "msg": "The int value 1 The lower value is String"
}
ok: [clientsrv003] => {
    "msg": "The int value 1 The lower value is String"
}

TASK [debug default filter] *******************************************************************************************************************
ok: [clientsrv001] => {
    "msg": "The Variable value is ansible is not define"
}
ok: [clientsrv002] => {
    "msg": "The Variable value is ansible is not define"
}
ok: [clientsrv003] => {
    "msg": "The Variable value is ansible is not define"
}

TASK [debug list max and min filter] **********************************************************************************************************
ok: [clientsrv001] => {
    "msg": "The list max value is 4 The list min value is 1"
}
ok: [clientsrv002] => {
    "msg": "The list max value is 4 The list min value is 1"
}
ok: [clientsrv003] => {
    "msg": "The list max value is 4 The list min value is 1"
}

TASK [debug ramdom filter] ********************************************************************************************************************
ok: [clientsrv003] => {
    "msg": "The list ramdom value is 2 and generate a random value is 841"
}
ok: [clientsrv001] => {
    "msg": "The list ramdom value is 3 and generate a random value is 511"
}
ok: [clientsrv002] => {
    "msg": "The list ramdom value is 3 and generate a random value is 341"
}

TASK [debug join filter] **********************************************************************************************************************
ok: [clientsrv002] => {
    "msg": "The join filter value is 1+2+3+4"
}
ok: [clientsrv001] => {
    "msg": "The join filter value is 1+2+3+4"
}
ok: [clientsrv003] => {
    "msg": "The join filter value is 1+2+3+4"
}

TASK [debug replace and regex_replace filter] *************************************************************************************************
ok: [clientsrv001] => {
    "msg": "The replace value is sTring The regex_replace value is ing"
}
ok: [clientsrv002] => {
    "msg": "The replace value is sTring The regex_replace value is ing"
}
ok: [clientsrv003] => {
    "msg": "The replace value is sTring The regex_replace value is ing"
}

PLAY RECAP ************************************************************************************************************************************
clientsrv001               : ok=9    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   
clientsrv002               : ok=9    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   
clientsrv003               : ok=9    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0
```

晓松

playbook Jinja2

Ansible 使用 jinja2 filter 模板

晓松

playbook Jinja2 Ansible 使用 jinja2 filter 模板

playbook Jinja2

Ansible 使用 jinja2 filter 模板