hosts

[centos-root]
192.168.174.129 ansible_ssh_port=22 
192.168.174.130 ansible_ssh_port=22  
192.168.174.131 ansible_ssh_port=22 

Ansible Vault 文件

创建 Ansible Vault 文件

# ansible-vault create passwords.yml

New Vault password:                    # 12345678
Confirm New Vault password:

编辑 Ansible Vault 文件

# ansible-vault edit passwords.yml

Vault password:

passwords.yml

hosts_passwords:
  192.168.174.129:
    currently_yunwei_password: yunwei*_129
  192.168.174.130:
    currently_yunwei_password: yunwei*_130
  192.168.174.131:
    currently_yunwei_password: yunwei*_131

playbook

ssh_login_stats.yaml

- hosts: centos
  remote_user: yunwei
  gather_facts: no  # 禁用 Ansible 在执行任务之前从目标主机中收集信息
  become: yes
  become_method: sudo
  become_user: root
  vars_files:
    - passwords.yml
  vars:
    ansible_ssh_pass: "{{ hosts_passwords[inventory_hostname].currently_yunwei_password }}"
    ansible_become_pass: "{{ ansible_ssh_pass }}" 

  tasks:
    - name: Count SSH logins on April 12
      shell: "grep 'Apr 12'  /var/log/secure  | grep 'sshd'"
      register: ssh_log_content
      ignore_errors: yes

    # 统计成功和失败的 SSH 登录次数
    - set_fact:
        success_count: "{{ ssh_log_content.stdout | regex_findall('Accepted password') | length }}"
        failure_count: "{{ ssh_log_content.stdout | regex_findall('Failed password') | length }}"
  
    # 格式化要写入文件的内容，去掉换行符
    - set_fact:
        log_content: "{{ inventory_hostname }} login success count is: {{ success_count }}, login failure count is: {{ failure_count }}" 

    # 将 SSH 登录次数保存到本地文件
    - name: Append SSH login counts on April 12 to file
      delegate_to: localhost        # 在本地执行任务，结果写入本地文件。而不会分散在不同的远程主机文件中。
      lineinfile:
        path: /root/ssh_login_counts_centos_apr12.txt
        line: "{{ log_content | regex_replace('(\n|\r)', '') }}"
        insertafter: EOF
        create: yes

测试 playbook

# ansible-playbook -i hosts ssh_login_stats.yaml --ask-vault-pass

Vault password: 

PLAY [centos] *****************************************************************************************************************************************************************

TASK [Gathering Facts] ********************************************************************************************************************************************************
ok: [192.168.174.131]
ok: [192.168.174.130]
ok: [192.168.174.129]

TASK [Count SSH logins on April 12] *******************************************************************************************************************************************
changed: [192.168.174.129]
changed: [192.168.174.131]
changed: [192.168.174.130]

TASK [set_fact] ***************************************************************************************************************************************************************
ok: [192.168.174.129]
ok: [192.168.174.130]
ok: [192.168.174.131]

TASK [set_fact] ***************************************************************************************************************************************************************
ok: [192.168.174.129]
ok: [192.168.174.130]
ok: [192.168.174.131]

TASK [Append SSH login counts on April 12 to file] ****************************************************************************************************************************
ok: [192.168.174.131 -> localhost]
ok: [192.168.174.130 -> localhost]
ok: [192.168.174.129 -> localhost]

PLAY RECAP ********************************************************************************************************************************************************************
192.168.174.129            : ok=5    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   
192.168.174.130            : ok=5    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   
192.168.174.131            : ok=5    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0 

确认结果

192.168.174.131 login success count is: 87, login failure count is: 14
192.168.174.130 login success count is: 84, login failure count is: 4
192.168.174.129 login success count is: 29, login failure count is: 2