Ansible: lineinfile for several lines

ansible

The same way there is a module lineinfile to add one line in a file, is there a way to add several lines?

I do not want to use a template because you have to provide the whole file.
I just want to add something to an existing file without necessarily knowing what the file already contains so a template is not an option.

Best Answer

You can use the lineinfile built-in in a loop. Here's an example:

- name: Set some kernel parameters
  lineinfile:
    dest: /etc/sysctl.conf
    regexp: "{{ item.regexp }}"
    line: "{{ item.line }}"
  loop:
    - { regexp: '^kernel.shmall', line: 'kernel.shmall = 2097152' }
    - { regexp: '^kernel.shmmax', line: 'kernel.shmmax = 134217728' }
    - { regexp: '^fs.file-max', line: 'fs.file-max = 65536' }

Related Solutions

Python domain name split name and extension

Wow, there are a lot of bad answers here. You can only do this if you know what's on the public suffix list. If you are using split or a regex or something else, you're doing this wrong.

Luckily, this is python, and there's a library for this: https://pypi.python.org/pypi/tldextract

From their readme:

>>> import tldextract
>>> tldextract.extract('http://forums.news.cnn.com/')
ExtractResult(subdomain='forums.news', domain='cnn', suffix='com')

ExtractResult is a namedtuple. Makes it pretty easy.

The advantage of using a library like this is that they will keep up with the additions to the public suffix list so you don't have to.

Commenting out a line with Ansible lineinfile module

You can use the replace module for your case:

---
- hosts: slurm
  remote_user: root

  tasks:
    - name: Comment out pipeline archive in fstab
      replace:
        dest: /etc/fstab
        regexp: '^//archive/pipeline'
        replace: '#//archive/pipeline'
      tags: update-fstab

It will replace all occurrences of the string that matches regexp.

lineinfile on the other hand, works only on one line (even if multiple matching are find in a file). It ensures a particular line is absent or present with a defined content.

Best Answer

Related Solutions

Python domain name split name and extension

Commenting out a line with Ansible lineinfile module

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