ansible playbook 使用 script 模块在远程主机上执行脚本

需求一：要在所有的远程主机上执行一下收集脚本，并在控制台打印出来
脚本如下：

[root@192 Playbooks]# cat CollectServerInformation.sh
#!/bin/bash

Collect server information

echo "Collecting server information..."

OS Information

echo "Operating System Information:"
cat /etc/*release

Kernel Version

echo "Kernel Version:"
uname -r

echo "Network Configuration:"
ip -4 a

编辑ansible-playbook

v1版本：

[root@192 Playbooks]# cat AnsiblePlay-CollectServerInformation.yaml
---
  - name: Execute script
    gather_facts: no
    become: yes
    become_user: root
    hosts: all
    tasks:
    - name: Execute script
      script:
        cmd: /opt/Playbooks/CollectServerInformation.sh

gather_facts: no ：不搜集主机 facts 可以加快执行速度

become: yes ：是否使用sudo

become_user: root ：切换的用户

执行效果：

[root@192 Playbooks]# ansible-playbook AnsiblePlay-CollectServerInformation.yaml

可以看出虽然脚本执行成功了，但是并没有在控制台打印出来。

v2版本：

[root@192 Playbooks]# cat AnsiblePlay-CollectServerInformation.yaml
---
  - name: Execute script
    gather_facts: no
    become: yes
    become_user: root
    hosts: all
    tasks:
    - name: Execute script
      script:
        cmd: /opt/Playbooks/CollectServerInformation.sh
      register: script_result

    - name: Output result
      debug:
        msg: "{{ script_result.stdout  }}"

register: script_result ：将脚本的值注册到 script_result 中
debug: # 调用debug模块打印 script_result 变量中的内容
msg: "{{ script_result.stdout }}"

需求二：要求把脚本的输出结果写入到ansible主机，并以远程主机名命名

这里的远程主机名指定是 inventory 清单中的主机名

如下：

编写ansible-play:

---
- name: Execute remote script and save output on Ansible control node
  hosts: all
  gather_facts: no
  become: yes
  become_user: root
  tasks:
    - name: Execute script on remote hosts and save output to a temporary file
      script:
        cmd: /opt/Playbooks/hardware_info.sh
      register: script_result

    - name: Save script output with hostname as filename
      copy:
        content: "{{ script_result.stdout }}"
        dest: "/root/{{ inventory_hostname }}_output.txt"
      when: script_result.stdout is defined

    - name: Fetch script output from remote hosts
      fetch:
        src: "/root/{{ inventory_hostname }}_output.txt"
        dest: "/opt/Playbooks/output/"
        flat: yes
      when: script_result.stdout is defined

上述ansible-play中定义了3个 task

task1：

将脚本的输出结果注册到变量script_result中

task2：

将远程主机的script_result.stdout 中的内容复制到 /root/{{ inventory_hostname }}_output.txt 文件，inventory_hostname 指定是在ansible清单中，对应的主机名。

task3：

将远程主机上/root/{{ inventory_hostname }}_output.txt 文件拷贝到ansible主机 /opt/Playbooks/output/ 目录下这里最后面记得加上/

when: script_result.stdout is defined ：在执行task前先判断 script_result.stdout 变量是否被定义

ansible playbook 使用 script 模块在远程主机上执行脚本

Collect server information

OS Information

Kernel Version