Ansible循环与判断

ansible循环和判断

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一、循环

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1、with_items迭代列表

比如Linux中依次需要安装多个软件包时，我们可以使用with_items迭代功能进行实现
例如：
安装httpd、samba、samba-client软件包时

[student@ansible ansible]$  vim b.yml
- name: install packages
  hosts: node1
  tasks:
    - name: yum_repo1
      yum_repository:
        file: server
        name: baseos
        description: rhel8
        baseurl: file:///mnt/BaseOS
        enabled: yes
        gpgcheck: no
 
    - name: yum_repo2
      yum_repository:
        file: server
        name: appstream
        description: appstream
        baseurl: file:///mnt/AppStream
        enabled: yes
        gpgcheck: no
 
    - name: mount cdrom
mount:
        src: /dev/cdrom
        path: /mnt
        fstype: iso9660
        state: mounted
 
    - name: install pks
      yum:
        name: "{
  {item}}"
        state: present
      with_items:
        - httpd
        - samba
        - samba-client
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2 、with_dict迭代字典

item.key对应着是字典的键，item.value对应着字典的值

[student@ansible ansible]$  vim c.yml
---
- name: test
  hosts: node1
  tasks:
    - name: debug
      debug:
        msg: "{
  {item.key}} & {
  {item.value}}"
      with_dict:
        address: 1
        netmask: 2
        gateway: 3

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3、with_fileglob迭代文件

比如拷贝多个文件到受控主机上时，可以使用

[student@ansible ansible]$ vim d.yml
---
- name: test
  hosts: node1
  tasks:
    - name: cp file
      copy:
        src: "{
  {item}}"
        dest: /tmp/
      with_fileglob:
        - /tmp/*.sh
        - /tmp/*.py

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4、with_lines迭代行

With_lines可以将命令行的输出结果按行迭代

[student@ansible ansible]$  vim e.yml
---
- name: test
  hosts: node1
  tasks:
    - name: cp file
      copy:
        src: "{
  {item}}"
        dest: /tmp/
      with_lines:
        - find  /etc/ansible  -name  "*.yml"

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5、with_nested嵌套迭代

a和b分别与1、2、3连接组合

[student@ansible ansible]$ vim f.yml
---
- name: test
  hosts: node1
  tasks:
    - name: debug
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