Ansible：使用 stdout_lines 来自注册变量，它在 shell 模块中使用循环

Question

想知道这里是否有人可以提供帮助...

我正在运行ning Ansible 2.10.7 - 下面的 Ansible 任务负责检查以前的 Ansible 运行是否存在任何 JBOSS 部署。

如果 check_deployments.stdout_lines (check_deployments.stdout_lines | length == 0) 没有返回任何内容，那么它应该部署循环中定义的所有部署。但是，如果返回 something (check_deployments.stdout_lines | length > 0) 那么它应该使用 check_deployments.stdout_lines内容（例如old_deployment1、old_deployment2、old_deployment3、old_deployment4）。

我目前运行将此 Ansible 与没有部署的新服务器结合使用，因此我希望由于 check_deployments.stdout_lines 为空而跳过取消部署部分。但是，它尝试运行，但失败并出现以下错误：

TASK [app : Undeploy all existing deployments as the versions do not match deployments defined in group_vars] ************************************************************************
fatal: []: FAILED! => {"msg": "'dict object' has no attribute 'stdout_lines'"}

这是我调试的输出：

    "check_deployments": {
        "changed": true,
        "msg": "All items completed",
        "results": [
            {
                "ansible_loop_var": "item",
                "changed": true,
                "cmd": "./jboss-cli.sh --connect --commands='ls deployment' | grep -q deployment1",
                "delta": "0:00:02.081544",
                "end": "2021-04-28 16:12:18.448965",
                "failed": false,
                "failed_when_result": false,
                "invocation": {
                    "module_args": {
                        "_raw_params": "./jboss-cli.sh --connect --commands='ls deployment' | grep -q deployment1",
                        "_uses_shell": true,
                        "argv": null,
                        "chdir": "/opt/jboss/jboss-eap-7.1/bin",
                        "creates": null,
                        "executable": null,
                        "removes": null,
                        "stdin": null,
                        "stdin_add_newline": true,
                        "strip_empty_ends": true,
                        "warn": true
                    }
                },
                "item": "deployment1",
                "msg": "non-zero return code",
                "rc": 1,
                "start": "2021-04-28 16:12:16.367421",
                "stderr": "",
                "stderr_lines": [],
                "stdout": "",
                "stdout_lines": []
            },
            {
                "ansible_loop_var": "item",
                "changed": true,
                "cmd": "./jboss-cli.sh --connect --commands='ls deployment' | grep -q deployment2",
                "delta": "0:00:02.185931",
                "end": "2021-04-28 16:12:21.396740",
                "failed": false,
                "failed_when_result": false,
                "invocation": {
                    "module_args": {
                        "_raw_params": "./jboss-cli.sh --connect --commands='ls deployment' | grep -q deployment2",
                        "_uses_shell": true,
                        "argv": null,
                        "chdir": "/opt/jboss/jboss-eap-7.1/bin",
                        "creates": null,
                        "executable": null,
                        "removes": null,
                        "stdin": null,
                        "stdin_add_newline": true,
                        "strip_empty_ends": true,
                        "warn": true
                    }
                },
                "item": "deployment2",
                "msg": "non-zero return code",
                "rc": 1,
                "start": "2021-04-28 16:12:19.210809",
                "stderr": "",
                "stderr_lines": [],
                "stdout": "",
                "stdout_lines": []
            },
            {
                "ansible_loop_var": "item",
                "changed": true,
                "cmd": "./jboss-cli.sh --connect --commands='ls deployment' | grep -q deployment3",
                "delta": "0:00:01.938456",
                "end": "2021-04-28 16:12:24.060703",
                "failed": false,
                "failed_when_result": false,
                "invocation": {
                    "module_args": {
                        "_raw_params": "./jboss-cli.sh --connect --commands='ls deployment' | grep -q deployment3",
                        "_uses_shell": true,
                        "argv": null,
                        "chdir": "/opt/jboss/jboss-eap-7.1/bin",
                        "creates": null,
                        "executable": null,
                        "removes": null,
                        "stdin": null,
                        "stdin_add_newline": true,
                        "strip_empty_ends": true,
                        "warn": true
                    }
                },
                "item": "deployment3",
                "msg": "non-zero return code",
                "rc": 1,
                "start": "2021-04-28 16:12:22.122247",
                "stderr": "",
                "stderr_lines": [],
                "stdout": "",
                "stdout_lines": []
            },
            {
                "ansible_loop_var": "item",
                "changed": true,
                "cmd": "./jboss-cli.sh --connect --commands='ls deployment' | grep -q deployment4",
                "delta": "0:00:01.934429",
                "end": "2021-04-28 16:12:26.819414",
                "failed": false,
                "failed_when_result": false,
                "invocation": {
                    "module_args": {
                        "_raw_params": "./jboss-cli.sh --connect --commands='ls deployment' | grep -q deployment4",
                        "_uses_shell": true,
                        "argv": null,
                        "chdir": "/opt/jboss/jboss-eap-7.1/bin",
                        "creates": null,
                        "executable": null,
                        "removes": null,
                        "stdin": null,
                        "stdin_add_newline": true,
                        "strip_empty_ends": true,
                        "warn": true
                    }
                },
                "item": "deployment4",
                "msg": "non-zero return code",
                "rc": 1,
                "start": "2021-04-28 16:12:24.884985",
                "stderr": "",
                "stderr_lines": [],
                "stdout": "",
                "stdout_lines": []
            }
        ]
    }
}

这是我的 Ansible 任务：

 - name: Check if the deployments defined in group_vars are already installed
  ansible.builtin.shell: "./jboss-cli.sh --connect --commands='ls deployment' | grep -q {{ item }}"
  args:
    chdir: "{{ jboss_home_dir }}/bin"
  register: check_deployments
  failed_when: check_deployments.rc == 2
  tags: # We always need to check this as the output determines whether or not we need to undeploy an existing deployment.
    - skip_ansible_lint
  loop:
 - "{{ new_deployment1 }}"
 - "{{ new_deployment2 }}"
 - "{{ new_deployment3 }}"
 - "{{ new_deployment4 }}"

 - name: Show list of deployments
  ansible.builtin.debug:
    var: check_deployments.stdout_lines

 - name: Undeploy all existing deployments as the versions do not match deployments defined in group_vars
  ansible.builtin.command: "./jboss-cli.sh --connect 'undeploy {{ item }} --all-relevant-server-groups'"
  args:
    chdir: "{{ jboss_home_dir }}/bin"
  when: check_deployments.stdout_lines | length > 0
  register: check_undeployment_status
  loop:
 - "{{ check_deployments.stdout_lines }}"

 - name: Deploy all deployments defined in group_vars
  ansible.builtin.command: "./jboss-cli.sh --connect 'deploy {{ jboss_deployment_dir }}/{{ item }} --server-groups=dm-server-group'"
  args:
    chdir: "{{ jboss_home_dir }}/bin"
  when: check_deployments.stdout_lines | length == 0 or check_undeployment_status.rc | default('') == 0
  loop:
 - "{{ new_deployment1 }}"
 - "{{ new_deployment2 }}"
 - "{{ new_deployment3 }}"
 - "{{ new_deployment4 }}"

Answer 1

您的剧本和给定的输出有问题。当我构建一个没有所有依赖项的类似剧本时：

- name: "Check if the deployments defined in group_vars are already installed"
  shell: "{{ item }}"
  register: check_deployments
  loop:
    - "pwd"
    - "ls -al"
    - "pwd"

- name: "Show list of deployments"
  debug:
    var: check_deployments.stdout_lines

我正在获取信息

TASK [Show list of deployments] *************************************************
ok: [localhost] => 
  check_deployments.stdout_lines: VARIABLE IS NOT DEFINED!

这是真的，因为您遍历了一个 Ansible 模块并将所有输出注册到一个变量中。在这种情况下，该变量包含一个结果列表。所以 - 你的 check_deployments.stdout_lines 循环是错误的。您需要遍历所有 check_deployments.results，其中每个模块运行包含正确的“已注册”变量，您要检查

- name: "Undeploy..."
  debug:
    msg: "stdout: {{ item.cmd }}"
  when: "item.stdout_lines | length > 1"
  loop: "{{ check_deployments.results }}"

这只会输出一个条目（ls -al）。所有其他将被跳过。

Ansible：使用 stdout_lines 来自注册变量，它在 shell 模块中使用循环

Ansible: Use stdout_lines from registered variable which uses loop in shell module

shell

jboss

loops

stdout

ansible