ansible-playbook之修改ssh端口和limits参数控制

一、描述

   拿到一批机器，需要做首先是修改ssh端口，防火墙配置，以及limits.conf控制文件描述符，进程数，栈大小等。

二、剧本如下：

---
    - hosts: "{{ host }}"
      remote_user: "{{ user }}"
      gather_facts: false

      tasks:
          - name: Modify ssh port 69410
            lineinfile:
                dest: /etc/ssh/{{ item }}
                regexp: '^Port 69410'
                insertafter: '#Port 22'
                line: 'Port 69410'

            with_items:
                - sshd_config
                - ssh_config
            tags:
                - sshport

          - name: Set sysctl file limiits
#            pam_limits: domain='*' limit_type=`item`.`limit_type` limit_item=`item`.`limit_item` value=`item`.`value` 
            pam_limits:
                dest: "{{ item.dest }}"
                domain: '*'
                limit_type: "{{ item.limit_type }}"
                limit_item: "{{ item.limit_item }}"
                value: "{{ item.value }}"
            with_items:
                - { dest: '/etc/security/limits.conf',limit_type: 'soft',limit_item: 'nofile', value: '655350' }
                - { dest: '/etc/security/limits.conf',limit_type: 'hard',limit_item: 'nofile', value: '655350'}
                - { dest: '/etc/security/limits.conf',limit_type: 'soft',limit_item: 'nproc', value: '102400' }
                - { dest: '/etc/security/limits.conf',limit_type: 'hard',limit_item: 'nproc', value: '102400' }
                - { dest: '/etc/security/limits.conf',limit_type: 'soft',limit_item: 'sigpending', value: '255377' }
                - { dest: '/etc/security/limits.conf',limit_type: 'hard',limit_item: 'sigpending', value: '255377' }
                - { dest: '/etc/security/limits.d/90-nproc.conf', limit_type: 'soft',limit_item: 'nproc', value: '262144' }
                - { dest: '/etc/security/limits.d/90-nproc.conf', limit_type: 'hard',limit_item: 'nproc', value: '262144' }

            tags:
                - setlimits