ansible_advanced_things

ansible.network

# network

# ipaddr: possible use case to verify lists of ip addresses from a database SELECT

# Example list of values
test_list = ['192.24.2.1', 'host.fqdn', '::1', '192.168.32.0/24', 'fe80::100/10', True, '', '42540766412265424405338506004571095040/64']

# {{ test_list | ipaddr }}
['192.24.2.1', '::1', '192.168.32.0/24', 'fe80::100/10', '2001:db8:32c:faad::/64']

# map: possible use case to filter subnets

vpc_subnet_list:
  - enable: true
  -
    subnet_name: "{{ aws_environment }}-public-{{ aws_region }}a"
    subnet_cidr: 10.168.104.0/21
    subnet_az: "{{ aws_region }}a"
    subnet_create: true
  -
    subnet_name: "{{ aws_environment }}-private-{{ aws_region }}a"
    subnet_cidr: 10.168.112.0/21
    subnet_az: "{{ aws_region }}a"
    subnet_create: true
 
 tasks:
 - debug:
     msg: "{{ vpc_subnet_list | map(attribute='subnet_cidr') | list }}"
     
# python string method
# note: In contrast to filters, methods are not attached to variables with a pipe, but with dot notation.

vars:
  - mystring: foobar something

- name: endswith method
  debug:
    msg: "{{ mystring.endswith('thing') }}"
    
# python split method: possible use case around ip address manipulation (cidr block calculations)
# note: to attach a method to a filtered object, another set of brackets – ( ) – is needed

vars:
 - myaddresses: ['192.24.2.1', '10.0.3.5', '171.17.32.1']

tasks:
- name: get last element of 10* IP
  debug:
    msg: "{{ (myaddresses|ipaddr('10.0.0.0/8'))[0].split('.')[-1] }}"

...

TASK [get last element of 10* IP] **************************************************************
ok: [localhost] => {
 "msg": "5"
}