.format() in Jinja2 filter

Archives Ansible Project
1

HI!

I'd like to reformat a list of IPv4 addresses with a Python formatting
string.

'12.34.56.78' should be transformed into
'peername.ip=12.34.56.78%255.255.255.255'.

In Python I'd just use

'peername.ip={0}%255.255.255.255'.format( '12.34.56.78')

How to express that in a Jinja2 filter?

I've tried this which fails with "not all arguments converted during
string formatting":

"{{ aedir_hosts.provider | map('extract', hostvars,
['ansible_default_ipv4', 'address']) |
format('peername.ip={0}%255.255.255.255') | list }}"

Many thanks in advance.

Ciao, Michael.

2

It looks like you just want to have a string prepended and appended to
it - I would use regex_replace for that.

This playbook works:

- hosts: localhost
  connection: local
  become: false
  gather_facts: false

  vars:
    ips:
      - 1.2.3.4
      - 12.32.45.11
      - 192.168.1.1
      - 8.8.8.8
      - 224.224.11.211

  tasks:
    - set_fact:
        filtered: "{{ ips | map('regex_replace', '^(.*)$',
'peername.ip=\\1%255.255.255.255') | list }}"

    - debug: var=filtered

TASK [debug] *******************************************************************
ok: [localhost] =>
  filtered:
  - peername.ip=1.2.3.4%255.255.255.255
  - peername.ip=12.32.45.11%255.255.255.255
  - peername.ip=192.168.1.1%255.255.255.255
  - peername.ip=8.8.8.8%255.255.255.255
  - peername.ip=224.224.11.211%255.255.255.255

3

Dirk,