/Ansible_tutorial

Ansible_tutorial

install ansible using pip and any virsion

pip install ansible==2.5

Run a ansible playbook file

ansible-playbook -i staging day1/check_blade_status.yml

Regular expression serarch for one time

- name: Get some info
  set_fact:
    some_info: "{{ result.stdout | regex_search(regex_var) }}"

Make a list using new line

- set_fact: var_list="{{plain_var.split('\n')}}"

https://stackoverflow.com/questions/43224436/splitting-variable-not-working-in-ansible

How to add new item into lists using loop

- set_fact:
    kk_list: "{{ kk_list | default([]) + [another_var | regex_search(item)] }}"
  loop: '{{loop_var}}'

https://blog.crisp.se/2016/10/20/maxwenzin/how-to-append-to-lists-in-ansible

Calculate and add new item a list

https://stackoverflow.com/questions/44673615/ansible-add-integer-value-to-a-list

code:


- set_fact:
    list2: "{{ list2 | default([]) + [nib_blade_active | regex_search(item)] }}"
  loop: '{{nib_running_blade_regexp}}'

difference two list and create one like error list


- name: Create error list
  set_fact:
    error_list: "{{ current_situation | difference(expected_situaltion) }}"

Jinja2: Change the value of a variable inside a loop

Try also dictionary-based approach. It seems to be less ugly.

{% set vars = {'foo': False} %}

{% for item in items %}
  {% if vars.update({'foo': True}) %} {% endif %}
  {% if vars.foo %} Ok(1)! {% endif %}
{% endfor %}

{% if vars.foo %} Ok(2)! {% endif %}

This also renders:

Ok(1)!
Ok(2)!

https://stackoverflow.com/questions/9486393/jinja2-change-the-value-of-a-variable-inside-a-loop

OR operator in Ansible

tasks:
  - name: "shut down CentOS 6 and Debian 7 systems"
    command: /sbin/shutdown -t now
    when: (ansible_distribution == "CentOS" and ansible_distribution_major_version == "6") or
          (ansible_distribution == "Debian" and ansible_distribution_major_version == "7")

AND operator in Ansible

tasks:
  - name: "shut down CentOS 6 systems"
    command: /sbin/shutdown -t now
    when:
      - ansible_distribution == "CentOS"
      - ansible_distribution_major_version == "6"

Find all match information from a variable/register using regular expression(regex_findall)

- name: Get Information from remote machine
  set_fact:
    lookup_list: "{{ register.stdout | regex_findall(a_regular_expression) }}"

Loop over tow list same time

src: https://docs.ansible.com/ansible/latest/user_guide/playbooks_loops.html#with-together

- name: with_together
  debug:
    msg: "{{ item.0 }} - {{ item.1 }}"
  with_together:
    - "{{ list_one }}"
    - "{{ list_two }}"

Run a python file on localhost

- name: get dest file list
  script: scripts/get_dest_list.py
  register: dest_list
  delegate_to: localhost