ansible 循环案例

男娘i 2021-12-17 04:55 158阅读 0赞

1. 循环一个列表

[root@wyl01 auto]# cat xh.yml 
    ---
    - hosts: all
      gather_facts: no
      tasks:
        - name: dispaly list
          debug: msg="{
       {item}}"
          with_items:
            - one
            - two
            - three
            - four
    
    [root@wyl01 auto]# ansible-playbook -i hosts xh.yml 
    
    PLAY [all] *************************************************************************************************************
    
    TASK [dispaly xunhuan] *************************************************************************************************
    ok: [192.168.52.129] => (item=one) => {
        "changed": false, 
        "item": "one", 
        "msg": "one"
    }
    ok: [192.168.52.129] => (item=two) => {
        "changed": false, 
        "item": "two", 
        "msg": "two"
    }
    ok: [192.168.52.129] => (item=three) => {
        "changed": false, 
        "item": "three", 
        "msg": "three"
    }
    ok: [192.168.52.129] => (item=four) => {
        "changed": false, 
        "item": "four", 
        "msg": "four"
    }

2. 循环一个字典

[root@wyl01 auto]# cat dict.yml 
    ---
    - hosts: all
      gather_facts: no
      tasks:
        - name: dispaly dict
          debug: msg="name==>{
       {item.key}},value==>{
       {item.value}}"
          with_items:
            - {key: "one",value: "v1"}
            - {key: "two",value: "v2"}
    
    [root@wyl01 auto]# ansible-playbook -i hosts dict.yml 
    
    PLAY [all] *************************************************************************************************************
    
    TASK [dispaly dict] ****************************************************************************************************
    ok: [192.168.52.129] => (item={u'key': u'one', u'value': u'v1'}) => {
        "changed": false, 
        "item": {
            "key": "one", 
            "value": "v1"
        }, 
        "msg": "name==>one,value==>v1"
    }
    ok: [192.168.52.129] => (item={u'key': u'two', u'value': u'v2'}) => {
        "changed": false, 
        "item": {
            "key": "two", 
            "value": "v2"
        }, 
        "msg": "name==>two,value==>v2"
    }
    
    PLAY RECAP *************************************************************************************************************
    192.168.52.129             : ok=1    changed=0    unreachable=0    failed=0

3. 嵌套循环

[root@wyl01 auto]# cat qtxuh.yml 
    ---
    - hosts: all
      gather_facts: no
      tasks:
        - name: display qitaoxunhuan
          debug: msg="{
       {item[0]}}===>{
       {item[1]}}"
          with_nested:
            - ['A','B']
            - ['a','b','c']
    
    
    [root@wyl01 auto]# ansible-playbook -i hosts qtxuh.yml 
    
    PLAY [all] *************************************************************************************************************
    
    TASK [display qitaoxunhuan] ********************************************************************************************
    ok: [192.168.52.129] => (item=[u'A', u'a']) => {
        "changed": false, 
        "item": [
            "A", 
            "a"
        ], 
        "msg": "A===>a"
    }
    ok: [192.168.52.129] => (item=[u'A', u'b']) => {
        "changed": false, 
        "item": [
            "A", 
            "b"
        ], 
        "msg": "A===>b"
    }
    ok: [192.168.52.129] => (item=[u'A', u'c']) => {
        "changed": false, 
        "item": [
            "A", 
            "c"
        ], 
        "msg": "A===>c"
    }
    ok: [192.168.52.129] => (item=[u'B', u'a']) => {
        "changed": false, 
        "item": [
            "B", 
            "a"
        ], 
        "msg": "B===>a"
    }
    ok: [192.168.52.129] => (item=[u'B', u'b']) => {
        "changed": false, 
        "item": [
            "B", 
            "b"
        ], 
        "msg": "B===>b"
    }
    ok: [192.168.52.129] => (item=[u'B', u'c']) => {
        "changed": false, 
        "item": [
            "B", 
            "c"
        ], 
        "msg": "B===>c"
    }
    
    PLAY RECAP *************************************************************************************************************
    192.168.52.129             : ok=1    changed=0    unreachable=0    failed=0

3. 文件列表

[root@wyl01 auto]# cat file.yml 
    ---
    - hosts: all
      tasks:
        - name: display file list
          debug: msg="{
       {item}}"
          with_fileglob:
            - /opt/auto/*
    
    [root@wyl01 auto]# ansible-playbook -i hosts file.yml 
    
    PLAY [all] *************************************************************************************************************
    
    TASK [Gathering Facts] *************************************************************************************************
    ok: [192.168.52.129]
    
    TASK [display file list] ***********************************************************************************************
    ok: [192.168.52.129] => (item=/opt/auto/site.yml) => {
        "changed": false, 
        "item": "/opt/auto/site.yml", 
        "msg": "/opt/auto/site.yml"
    }
    ok: [192.168.52.129] => (item=/opt/auto/site.retry) => {
        "changed": false, 
        "item": "/opt/auto/site.retry", 
        "msg": "/opt/auto/site.retry"
    }
    ok: [192.168.52.129] => (item=/opt/auto/hosts) => {
        "changed": false, 
        "item": "/opt/auto/hosts", 
        "msg": "/opt/auto/hosts"
    }
    ok: [192.168.52.129] => (item=/opt/auto/vars.yml) => {
        "changed": false, 
        "item": "/opt/auto/vars.yml", 
        "msg": "/opt/auto/vars.yml"
    }
    
    PLAY RECAP *************************************************************************************************************
    192.168.52.129             : ok=2    changed=0    unreachable=0    failed=0

4 until循环

# 循环条件,不是以Master开头的,循环5次每次5s,直到文件以Master开头
    [root@wyl01 auto]# cat loop.yml 
    ---
    - hosts: all
      tasks:
        - name: display loop
          shell: cat /root/ansible
          register: hosts
          until: hosts.stdout.startswith("Master")
          retries: 5 
          delay: 5
    
    
    [root@wyl01 auto]# ansible-playbook -i hosts loop.yml 
    
    PLAY [all] *************************************************************************************************************
    
    TASK [Gathering Facts] *************************************************************************************************
    ok: [192.168.52.129]
    
    TASK [display loop] ****************************************************************************************************
    FAILED - RETRYING: display loop (5 retries left).
    FAILED - RETRYING: display loop (4 retries left).
    FAILED - RETRYING: display loop (3 retries left).
    changed: [192.168.52.129]
    
    PLAY RECAP *************************************************************************************************************
    192.168.52.129             : ok=2    changed=1    unreachable=0    failed=0

5 for 循环

[root@wyl01 auto]# cat test1.yml 
    ---
    - hosts: all
      tasks:
        - name: get values
          shell: "{
       {item}}"
          with_items:
            - hostname
            - uname
          register: ret
        - name: display values
          debug: msg="{% for i in ret.results  %} {
       { i.stdout }} {% endfor %}"
    
    [root@wyl01 auto]# ansible-playbook -i hosts test1.yml 
    
    PLAY [all] *************************************************************************************************************
    
    TASK [Gathering Facts] *************************************************************************************************
    ok: [192.168.52.129]
    
    TASK [get values] ******************************************************************************************************
    changed: [192.168.52.129] => (item=hostname)
    changed: [192.168.52.129] => (item=uname)
    
    TASK [display values] **************************************************************************************************
    ok: [192.168.52.129] => {
        "msg": " wyl02  Linux "
    }
    
    PLAY RECAP *************************************************************************************************************
    192.168.52.129             : ok=3    changed=1    unreachable=0    failed=0

6 判断when

[root@wyl01 auto]# cat when.yml 
    ---
    - hosts: all
      gather_facts: yes
      tasks:
        - name: ceshi  when
          debug: msg="{
       {ansible_default_ipv4.address}}"
          when: ansible_default_ipv4.address == "192.168.52.129"
    
    [root@wyl01 auto]# ansible-playbook -i hosts when.yml 
    
    PLAY [all] *************************************************************************************************************
    
    TASK [Gathering Facts] *************************************************************************************************
    ok: [192.168.52.129]
    ok: [192.168.52.130]
    
    TASK [ceshi  when] *****************************************************************************************************
    skipping: [192.168.52.130]   # 跳过该次循环
    ok: [192.168.52.129] => {
        "msg": "192.168.52.129"
    }
    
    PLAY RECAP *************************************************************************************************************
    192.168.52.129             : ok=2    changed=0    unreachable=0    failed=0   
    192.168.52.130             : ok=1    changed=0    unreachable=0    failed=0