Ansible - Others

lookup to access external file or database

Basic usage:

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---
- hosts: all
  remote_user: root
  gather_facts: false
  vars:
    contents: "{{ lookup('file', 'data/plain.txt') }}"

we can also read other data:lookup('file|env|pipe|template|ini|csvfile|dig|')

filter

filter excute commands in the management node and get responds.

Usage of filters:

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- hosts: localhost
  remote_user: root
  gather_facts: false
  vars:
    my_test_string: "This is the testing string"
  tasks:
    - name: "quote {{ my_test_string }}"
      debug: msg="echo {{ my_test_string | quote }}"

different filters:

  • quote
  • default(n)
  • default(omit)
  • mandatory
  • bool
  • ternary
  • basename
  • dirname
  • expanduser
  • realpath
  • relpath
  • splitext
  • b64encode
  • to_uuid
  • hash(‘sha1’|‘md5’|)
  • checksum
  • comment()
  • ipaddr
  • ipv4
  • ipv6
  • to_json
  • to_yaml

Assert

Usage is just like filters

  • match
  • search
  • version_compare
  • issubset
  • issuperset
  • is_dir
  • is_file
  • is_link
  • exist

assert the cmd result

  • failed
  • successed
  • changed
  • skipped

Plugin