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How do I turn my shell module command into my own module in ansible using bash? – CentOS

This is my yml file:

- hosts: webservers
  vars:
    www_port: 80
  become: yes
  tasks:
   - name: install lsof if it's redhat
     yum:
       name: lsof
       state: latest
     when: ansible_distribution == 'CentOS' or ansible_distribution == 'Red Hat Enterprise Linux'
   - name: install lsof if  it's debian
     apt:
       name: lsof
       state: latest
     when: ansible_distribution == 'Ubuntu' or ansible_distribution == 'Debian'

   - name: Finding out what web server it uses
     shell: "lsof -i :{{ www_port }} | grep LISTEN | cut -d ' ' -f 1"
     register: result
   - name: output the result of what web server it uses
     debug: msg="{{ result.stdout_lines|first }}"

   - name: list all vhosts if it uses httpd
     shell: cd /etc/httpd/sites-enabled; ls | while read file; do awk '/^ServerName/ {f=1} f {for(i=1;i<=NF;i++)$
     register: rezult
     when: result.stdout_lines|first == "httpd"
   - name: output vhosts rezult if it uses httpd
     debug: msg="{{ rezult.stdout_lines }}"
     when: result.stdout_lines|first == "httpd"

   - name: list all vhosts if it uses nginx
     shell: cd /etc/nginx/sites-enabled; ls | while read file; do awk '/^server_name/ {f=1} f {for(i=1;i<=NF;i++$
     register: recult
     when: result.stdout_lines|first == "nginx"
   - name: output vhosts recult (results) if it uses nginx
     debug: msg="{{ recult.stdout_lines }}"
     when: result.stdout_lines|first == "nginx"

I want to turn these “shell:” module commands into my own module using a bash script since I don’t know python. Essentially this playbook outputs the name of the webserver the host uses and it outputs all the vhosts in the the webserver configuration file. I want to combine these shell: module commands into one module that does all of those things.

ansible.cfg file states that the library of my own modules are in /usr/share/my_modules so I made that directory and made a vhosts.bash script that is basically the second shell command in the yml file. I replaced that line (“shell: ….”) with ony “vhosts:” but that didn’t work.
This is the vhosts.bash file in /usr/share/my_modules

#!/bin/bash
cd /etc/httpd/sites-enabled;
ls | while read file;
do awk '/^ServerName/ {f=1} f {for(i=1;i<=NF;i++) if ($i~/./) print $i; else if($i!="ServerName") exit}' $file;
done;

and when I run the playbook I get:

  - name: list all vhosts if it uses httpd
     ^ here

but it has nothing to do with the name, this is the line in the yml:

- name: list all vhosts if it uses httpd
     vhosts:
     register: rezult

I don’t know if I completly missed the point but that’s kind of how this guy did it in this video: https://www.youtube.com/watch?time_continue=1&v=aY7lmtW8ROM

Tags:

2

Answers


  1. 0

    Not sure your indentation is right, the line after name should be in line like:


    - name: list all vhosts if it uses httpd
    vhosts:

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  2. 0

    Looks like you are picking up the default module paths:

    (default) = ['/home/ansible/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']

    You will need to either move your module, change the global ansible.cfg, or create a local ansible.cfg. If the module is specific to this playbook, you can also consider just placing it in a folder called library in the playbook directory.

    The second issue you will run into is that your bash module needs to output the success/failure status in a way that is readable by Ansible. As an example, you would need to have output similar to:

    if [ $? == 0 ]; then
  printf '{"changed": true, "rc": 0}'
else
  printf '{"failed": true, "msg": "Something went wrong", "rc": 1}'
fi
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