centos - Ansible - 如何在 CentOS 中添加/修改 PATH 变量？

Question

我正在尝试将 /usr/pgsql-10/bin 添加到 $PATH，因为我希望使用该机器的每个人都能够运行psql 命令。

试图关注 this示例:

- name: add {{extra_path}} to path
  lineinfile:
    dest: /etc/environment
    state: present
    backrefs: yes
    regexp: 'PATH=(["]*)((?!.*?{{extra_path}}).*?)(["]*)$'
    line: "PATH=\1\2:{{extra_path}}\3"

首先，我不太明白我应该如何修改它。我应该只用我的路径 (/usr/pgsql-10/bin) 替换 extra_path 还是整个 {{extra_path}}。

我尝试了两种方法，但都遇到了不同的错误。更糟糕的是，我的 /etc/environment 甚至不包含 PATH。

Answer 1

仅声明附加路径

  vars:
    extra_path: /usr/pgsql-10/bin

以下任务基于 Response to updating PATH with ansible - system wide 的想法

• 如果文件在 Controller 中测试本地文件

    - name: 'Add {{ extra_path }} if PATH does not exist'
      lineinfile:
        path: /etc/environment
        line: 'PATH="{{ extra_path }}"'
        insertafter: EOF
      when: lookup('file', '/etc/environment') is not search('^\s*PATH\s*=')

    - name: 'Add {{ extra_path }} to PATH'
      lineinfile:
        path: /etc/environment
        regexp: 'PATH=(["])((?!.*?{{ extra_path }}).*?)(["])$'
        line: 'PATH=\1\2:{{ extra_path }}\3'
        backrefs: yes

• 如果文件在远程主机上，首先获取它们。为了使游戏幂等，不要在获取时报告更改。使目的地符合您的需求

    - name: 'Fetch /etc/environment to {{ playbook_dir }}/environments'
      fetch:
        src: /etc/environment
        dest: "{{ playbook_dir }}/environments"
      changed_when: false

    - name: 'Add {{ extra_path }} if PATH does not exist'
      lineinfile:
        path: /etc/environment
        line: 'PATH="{{ extra_path }}"'
        insertafter: EOF
      when: lookup('file', path) is not search('^\s*PATH\s*=')
      vars:
        path: "{{ path_items|path_join }}"
        path_items:
          - "{{ playbook_dir }}"
          - environments
          - "{{ inventory_hostname }}"
          - etc/environment

    - name: 'Add {{ extra_path }} to PATH'
      lineinfile:
        path: /etc/environment
        regexp: 'PATH=(["])((?!.*?{{ extra_path }}).*?)(["])$'
        line: 'PATH=\1\2:{{ extra_path }}\3'
        backrefs: yes

参见 Python regex .