反式rsyslog安装和配置

Question

我是ansible新手，尝试在远程主机上安装rsyslog并将它们配置为客户端，并将事件转发到rsyslog服务器，如下所述：

如果rsyslog已经安装了

• ：
  • 不做任何更改。如果rsyslog运行
    • ，则
    • 打印找到的转发地址。(目前，我将脚本"listIP.py“复制到远程主机，运行它，然后删除它。此步骤以expected)

的形式工作

- else 
    - replace the the config file with my predefined rsyslog.conf (this step also works as expected)

安装rsyslog (工作fine)

• replace配置文件

• 重新启动service

)

当远程主机没有安装rsyslog时，我得到一个错误：“在计算条件(ansible_facts.services"rsyslog.service".state !=”rsyslog.service时“)：'dict‘没有属性'rsyslog.service’”

我认为这可能是因为rsyslog.service.state是在安装开始时(安装之前)填充的，因此出现了故障。

其他可能的选择是，在安装rsyslog之后，服务是不活动的(死的)。

有什么解决办法吗？

请把下面的剧本-

---

- hosts: Linux_Servers
  become: yes
  gather_facts: True
  debugger: "on_failed"

  handlers:

    - name: Replace rsyslog config file
      copy:
        src: /home/controller/Desktop/rsyslog.conf
        dest: /etc/rsyslog.conf
        force: yes
      listen: "Replace config file"
    - name: verify rsyslog running
      service:
        name: rsyslog
        state: started
      listen: "Replace config file"

  tasks:

    - name: Gathering services state...
      service_facts:

    - name: do facts module to get latest information
      setup:
        filter:
          - 'rsyslog'

    - name: If Rsyslog installed, print rsyslog current status. else - move to OS based installation.
      debug:
        var: ansible_facts.services["rsyslog.service"]

    - name: OS check
      debug: msg="{{ ansible_distribution }}"
      register: distro

    - name: The detected OS is CentOS. Installing rsyslog...
      yum:
        name: rsyslog
      register: installedSuccess
      when: ansible_facts['distribution'] == 'CentOS'

    - name: The detected OS is Ubuntu. Installing rsyslog...
      apt:
        name: rsyslog
      register: installedSuccess
      when: ansible_facts['distribution'] == "Ubuntu"

    - name: After success installation, replace config file.
      copy:
        src: /home/controller/Desktop/rsyslog.conf
        dest: /etc/rsyslog.conf
        force: yes
      when: installedSuccess

# update service data?

    - name: Rsyslog is installed but not running. restarts service now...
      service:
        name: rsyslog
        state: started
      when: ansible_facts.services["rsyslog.service"].state != "running"

    - name: Rsyslog is installed and running. Copying script to find forwrding address...
      copy: src=/home/controller/Desktop/listIP.py dest=listIP.py
      when: ansible_facts.services["rsyslog.service"].state == "running"

    - name: search rsyslog_conf for rsyslog server IP addresses
      command: python listIP.py
      register: IPaddress
      when: ansible_facts.services["rsyslog.service"].state == "running"

    - name: Found forwarding address-
      debug: msg="{{ IPaddress.stdout }}"

    - name: Clean Script From Remote Host
      file:
        state: absent
        path: "listIP.py"
      when: IPaddress

    - name: No forwarding address found. Replace conf file...
      copy:
        src: /home/controller/Desktop/rsyslog.conf

Answer 1

我知道这个答复迟了8个月，但我想我会把我的解决方案放在这里，以防其他人遇到这种情况。

这里的主要问题是Ansible只在播放开始时收集事实，而不更新vars中间播放的事实，所以当您在安装后通过检查事实来检查服务的状态时，您是在对照初始状态进行检查。

有几种方法可以解决这个问题，但是最简单、最直接的方法就是再次调用Ansible setup模块(ansible.builtin.setup)，过滤您想要的事实。像这样的东西看起来是这样的：

- name: SELinux - Force ansible to regather facts
  setup: filter='rsyslog'

我还没有对此进行准确的测试，但原理是合理的；像上面这样调用安装程序会重新调用安装模块，该模块从一开始就收集事实。--我不认为这会更新ansible_facts变量，因为您很可能不得不通过set_fact模块重新分配变量，或者用不同的选项调用安装模块。