Ansible汇总统计（成功/失败主机数）

好的，那我帮你加一个 汇总统计，在 all.log 的最后输出：

• 成功的主机数量
• 失败的主机数量
• 失败主机的列表

这样你不用手工翻日志，就能一眼看到执行结果。

Playbook：带统计信息

保存为 ping_baidu.yml：

- hosts: webservers
  become: no
  tasks:
    - name: Ping www.baidu.com from each host
      shell: ping -c 4 www.baidu.com
      register: ping_result
      ignore_errors: yes   # 即使失败也继续执行

    - name: Collect results with status
      set_fact:
        ping_summary: "{{ ping_summary | default([]) + ['===== ' + inventory_hostname + ' =====\n' + (ping_result.stdout | default('FAILED'))] }}"
        ping_success: "{{ (ping_success | default([])) + ([inventory_hostname] if ping_result.rc == 0 else []) }}"
        ping_failed: "{{ (ping_failed | default([])) + ([inventory_hostname] if ping_result.rc != 0 else []) }}"

- hosts: localhost
  gather_facts: no
  tasks:
    - name: Ensure result directory exists
      file:
        path: /tmp/ping_results
        state: directory
        mode: '0755'

    - name: Save all results into one file with summary
      copy:
        content: |
          {{ hostvars | dict2items | selectattr('value.ping_summary','defined') | map(attribute='value.ping_summary') | sum(start=[]) | join('\n\n') }}

          ===== SUMMARY =====
          Success hosts ({{ hostvars | dict2items | map(attribute='value.ping_success') | select('defined') | sum(start=[]) | length }}):
          {{ hostvars | dict2items | map(attribute='value.ping_success') | select('defined') | sum(start=[]) | join(', ') }}

          Failed hosts ({{ hostvars | dict2items | map(attribute='value.ping_failed') | select('defined') | sum(start=[]) | length }}):
          {{ hostvars | dict2items | map(attribute='value.ping_failed') | select('defined') | sum(start=[]) | join(', ') }}
        dest: /tmp/ping_results/all.log

结果示例 /tmp/ping_results/all.log

===== 10.0.19.207 =====
PING www.a.shifen.com (14.215.177.39) 56(84) bytes of data.
64 bytes from 14.215.177.39: icmp_seq=1 ttl=54 time=12.3 ms
64 bytes from 14.215.177.39: icmp_seq=2 ttl=54 time=11.9 ms

===== 10.0.19.208 =====
FAILED

===== SUMMARY =====
Success hosts (1):
10.0.19.207

Failed hosts (1):
10.0.19.208

要不要我再帮你把这个 统计信息输出到终端（stdout），而不仅仅写文件？这样你运行完 Playbook 就能立刻看到成功/失败情况。