通过ansible读取文本文件中的每一行

Question

我必须从文本文件中读取每一行并将其添加到 yaml 中。这是我的剧本

- hosts: localhost
  tasks:
    - name: Register a file content as a variable
      ansible.builtin.shell: cat /home/packages.txt
      register: result

    - name: Print the transformed variable
      ansible.builtin.debug:
        msg: '{{ item }}'
      loop: '{{ result.stdout | list }}'

    - name: install
      shell: yum install '{{ item }}'
      loop: '{{ result.stdout | list }}'

packages.txt 包含

nginx
vim
grafana

当我运行这样做时，软件包没有安装。这是控制台输出，

TASK [Register a file content as a variable] **********************************************************************************
changed: [localhost]

TASK [Print the transformed variable] *****************************************************************************************

TASK [install] ****************************************************************************************************************

PLAY RECAP ********************************************************************************************************************
localhost : ok=2    changed=1    unreachable=0    failed=0    skipped=2    rescued=0    ignored=0

要求是通过这个 ansible 剧本从文本文件安装这些包

Answer 1

给定文件

shell> cat packages.txt 
nginx
vim
grafana

在本地主机上，简单地迭代列表，例如下面的剧本

shell> cat test.yml
- hosts: localhost
  tasks:
    - name: install
      package: "{{ item }}"
      loop: "{{ lookup('file', 'packages.txt').split('\n') }}"

给予

shell> ansible-playbook test.yml --check

PLAY [localhost] *****************************************************

TASK [install] *******************************************************
ok: [localhost] => (item=nginx)
ok: [localhost] => (item=vim)
ok: [localhost] => (item=grafana)

PLAY RECAP ***********************************************************
localhost: ok=1 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0

在远程主机上（查找仅适用于本地主机），迭代stdout_lines，例如

    - name: Register a file content as a variable
      command: cat packages.txt
      register: result

    - name: install
      package: "{{ item }}"
      loop: "{{ result.stdout_lines }}"

可选，如果你想避免命令或shell模块使用fetch。例如，在下面的剧本中

shell> cat test.yml
- hosts: test_11
  tasks:
    - name: Create directory files
      file:
        state: directory
        path: files

    - name: Get file
      fetch:
        src: packages.txt
        dest: files

    - name: install
      package:
        name: "{{ item }}"
      loop: "{{ lookup('file', path).split('\n') }}"
      vars:
        path: 'files/{{ inventory_hostname }}/packages.txt'

创建目录 files 并首先从远程主机获取文件。这将创建文件

shell> cat files/test_11/packages.txt 
nginx
vim
grafana

然后迭代文件中的行

TASK [install] ***************************************************
changed: [test_11] => (item=nginx)
changed: [test_11] => (item=vim)
changed: [test_11] => (item=grafana)

通过ansible读取文本文件中的每一行

Read every line from a text file through ansible

linux

package

ansible