How do you Ensure a Line Exists and is Uncommented with Ansible LineinFile?

问题:

How do you ensure a specific line exists in a file and is uncommented with ansible's `lineinfile'

The line I want uncommented (in .htaccess):

#php_flag display_errors on 

I have used the following:

  - name: Make sure PHP Errors are turned on     lineinfile: dest={{ www_path }}/.htaccess line="php_flag display_errors on" 

回答1:

Actually your example works as is:

Contents of the .htaccess file:

#php_flag display_errors on 

The ansible play:

- name: Make sure PHP Errors are turned on   lineinfile:      dest: "{{ www_path }}/.htaccess"     line: "php_flag display_errors on" 

Results of ansible-playbook with this play:

$ cat .htaccess #php_flag display_errors on php_flag display_errors on 

If the file starts with the line commented you'll see a second line uncommented. To correct this, use a regexp that will match the existing line and replace it:

- lineinfile:     dest: /Users/bwhaley/tmp/file     regexp: '^#php_flag display_errors'     line: 'php_flag display_errors'     backrefs: yes 

Note though that with backrefs: yes if the line you want uncommented is not already present and commented, the play will make no change at all.

文章来源: How do you Ensure a Line Exists and is Uncommented with Ansible LineinFile?