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如何在ansible playbook中提取命令的stdout作为变量

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如何在ansible playbook中提取命令的stdout作为变量

我正在尝试使用 Ansible 在虚拟机上安装 docker 凭证存储

这是 playbook.yaml 中凭证存储代码的一部分

但是，问题是我尝试将 gpg 密钥 id 导出为 play.4 上的变量，但无法在 play.6 上回显该变量

我尝试使用寄存器，但寄存器变量似乎无法在其他游戏的 shell 命令中使用

 - name: 1. Install gpg and pass
    apt:
      update_cache: yes
      name:
      - gpg
      - pass
  - name: 2. Create GPG key
    shell: |
      cat > /root/gpgKey <<EOF
      %echo Generating a default key
       Key-Type: default
       Subkey-Type: default
       Name-Real: abc999
       Name-Comment: abc999
       Name-Email: [email protected]
       Expire-Date: 0
       Passphrase: abc999
       %commit
       %echo done
      EOF
  - name: 3. Generate keys with `/root/gpgKey` file
    shell: |
      sudo gpg --batch --generate-key /root/gpgKey
  - name: 4. Verify key generation
    shell: |
      var=$(sudo gpg --list-secret-keys --keyid-format=long | sed '4!d' | tr -d " ")
  - name: 5. Download docker-credential-pass
    shell: |
      export PASS_VERSION="v0.6.0"
      wget -q "https://github.com/docker/docker-credential-helpers/releases/download/${PASS_VERSION}/docker-credential-pass-${PASS_VERSION}-amd64.tar.gz" -O - | sudo tar -x -C /usr/bin
      sudo chmod 710 "/usr/bin/docker-credential-pass"
  - name: 6. Echo GPG id
    shell: |
      echo $var

ansible-playbook playbook.yaml -vvv这是play.6命令的输出echo $var：标准输出什么也没有。

changed: [localhost] => {
    "changed": true,
    "cmd": "echo $var\n",
    "delta": "0:00:00.002488",
    "end": "2023-04-27 09:36:46.483048",
    "invocation": {
        "module_args": {
            "_raw_params": "echo $var\n",
            "_uses_shell": true,
            "argv": null,
            "chdir": null,
            "creates": null,
            "executable": null,
            "removes": null,
            "stdin": null,
            "stdin_add_newline": true,
            "strip_empty_ends": true,
            "warn": true
        }
    },
    "rc": 0,
    "start": "2023-04-27 09:36:46.480560",
    "stderr": "",
    "stderr_lines": [],
    "stdout": "",
    "stdout_lines": []
}

答案1

关于评论“您需要register命令的输出以便 Ansible 存储它。“ 和 ”我register之前尝试过，但找不到register在其他play的shell中使用该变量的方法。“您可能已经查看了以下最小示例剧本

---
- hosts: localhost
  become: true
  gather_facts: false

  tasks:

  - name: 4. Verify key generation
    shell:
      cmd: "gpg --list-secret-keys --keyid-format=long | sed '4!d' | tr -d ' '"
    register: VAR

  - name: 6. Echo GPG ID
    shell:
      cmd: "echo {{ VAR.stdout_lines }}"
    register: result

  - name: Show result
    debug:
      var: result

或者更通用的

---
- hosts: localhost
  become: false
  gather_facts: false

  tasks:

  - name: Echo example 1
    shell:
      cmd: "echo 12:34:56:78:90:AB:CD:EF"
    register: VAR

  - name: Echo example 2
    shell:
      cmd: "echo {{ VAR.stdout_lines }}"
    register: result

  - name: Show registered variable
    debug:
      var: result

  - name: Show result content only
    debug:
      msg: "{{ result }}"

因为它向您展示了如何熟悉注册、返回值和数据结构。

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