Ansible 小手册系列 十三(Jinja2)

{{  some_variable | to_json  }} 
{{  some_variable | to_yaml  }}

{{  some_variable | to_nice_json  }} 
{{  some_variable | to_nice_yaml  }}

{{ some_variable | to_nice_json(indent=2) }}
{{ some_variable | to_nice_yaml(indent=8) }}

{{ some_variable | from_json }}

{{ some_variable | from_yaml }}

tasks:
  - shell: cat /some/path/to/file.json
    register: result
- set_fact: myvar="{{ result.stdout | from_json }}"

{{ variable | mandatory }}

{{ result.cmd|default(5) }}

- name: touch files with an optional mode
  file: dest={{item.path}} state=touch mode={{item.mode|default(omit)}}
  with_items:
    - path: /tmp/foo
    - path: /tmp/bar
    - path: /tmp/baz
      mode: "0444"

{{ list1 | min }}

{{ [3, 4, 2] | max }}

{{ list1 | unique }}

{{ list1 | union(list2) }}

{{ list1 | intersect(list2) }}

{{ list1 | difference(list2) }}

{{ list1 | symmetric_difference(list2) }}

{{ ['a','b','c','d','e','f']|random }}

{{ 59 |random}}

{{ 100 |random(step=10) }}

{{ 100 |random(1, 10) }}
{{ 100 |random(start=1, step=10) }}

{{ {'a':1, 'b':2}|combine({'b':3}) }}

{'a':1, 'b':3}

{{ {'a':{'foo':1, 'bar':2}, 'b':2}|combine({'a':{'bar':3, 'baz':4}}, recursive=True) }}

{'a':{'foo':1, 'bar':3, 'baz':4}, 'b':2}

{{ groups['x']|map('extract', hostvars, 'ec2_ip_address')|list }}

{{ "Plain style (default)" | comment }}

#
# Plain style (default)
#

{{ "C style" | comment('c') }}
{{ "C block style" | comment('cblock') }}
{{ "Erlang style" | comment('erlang') }}
{{ "XML style" | comment('xml') }}

{{ "Custom style" | comment('plain', prefix='#######\n#', postfix='#\n#######\n   ###\n    #') }}

when: ansible_os_family | match("Red[Hh]at" )
when: url | search("/users/.*/resources/.*")

- shell: echo {{ string_value | quote }}

{{ ('name' == 'John') | ternary('Mr','Ms') }}

{{ list | join(" ") }}

{{ path | basename }}

{{ path | win_basename }}

{{ path | dirname }}

{{ path | realpath }}

{{ path | splitext }}

{{ encoded | b64decode }}
{{ decoded | b64encode }}

{{ hostname | to_uuid }}

- debug: msg=test
  when: some_string_value | bool

{{ myvar | type }}

{{ ['a','b','c']|shuffle }} => ['c','a','b']
{{ ['a','b','c']|shuffle }} => ['b','c','a']

{{ myvar | log }}
{{ myvar | log(10) }}

{{ myvar | pow(2) }}
{{ myvar | pow(5) }}

{{ myvar | root }}
{{ myvar | root(5) }}

{{ myvar | ipaddr }}

{{ myvar | ipv4 }}
{{ myvar | ipv6 }}

{{ '192.0.2.1/24' | ipaddr('address') }}

{{ 'test1'|hash('sha1') }}
{{ 'test1'|hash('md5') }}

{{ 'test2'|checksum }}

{{ 'passwordsaresecret'|password_hash('sha512') }}
{{ 'secretpassword'|password_hash('sha256', 'mysecretsalt') }}

{% if loop.index is divisibleby 3 %}
{% if loop.index is divisibleby(3) %}

vars:
  url: "http://example.com/users/foo/resources/bar"

tasks:
    - shell: "msg='matched pattern 1'"
      when: url | match("http://example.com/users/.*/resources/.*")

    - debug: "msg='matched pattern 2'"
      when: url | search("/users/.*/resources/.*")

    - debug: "msg='matched pattern 3'"
      when: url | search("/users/")

{{ ansible_distribution_version | version_compare('12.04', '>=') }}

{{ sample_version_var | version_compare('1.0', operator='lt', strict=True) }}

<, lt, <=, le, >, gt, >=, ge, ==, =, eq, !=, <>, ne

vars:
    a: [1,2,3,4,5]
    b: [2,3]
tasks:
    - debug: msg="A includes B"
      when: a|issuperset(b)

    - debug: msg="B is included in A"
      when: b|issubset(a)

- debug: msg="path is a directory"
  when: mypath|is_dir
- debug: msg="path is a file"
  when: mypath|is_file
- debug: msg="path is a symlink"
  when: mypath|is_link
- debug: msg="path already exists"
  when: mypath|exists
- debug: msg="path is {{ (mypath|is_abs)|ternary('absolute','relative')}}"
- debug: msg="path is the same file as path2"
  when: mypath|samefile(path2)
- debug: msg="path is a mount"
  when: mypath|ismount

tasks:
- shell: /usr/bin/foo
    register: result
    ignore_errors: True
- debug: msg="it failed"
    when: result|failed
  - debug: msg="it changed"
    when: result|changed
- debug: msg="it succeeded in Ansible >= 2.1"
    when: result|succeeded
- debug: msg="it succeeded"
    when: result|success
- debug: msg="it was skipped"
    when: result|skipped

{{ foo.bar }}
{{ foo['bar'] }}

{{ "{{ "{% raw %}" }}
    <ul>
    {% for item in seq %}
        <li>{{ item }}</li>
    {% endfor %}
    </ul>
{{ "{%"}}{{ "endraw %}" }}

 {{ user.username|e }} 

{% for user in users %}
  <li>{{ user.username|e }}</li>
{% endfor %}

{% for key, value in my_dict.iteritems() %}
    <dt>{{ key|e }}</dt>
    <dd>{{ value|e }}</dd>
{% endfor %}

{% for user in users %}
    {%- if loop.index >= 10 %}{% break %}{% endif %}
{%- endfor %}

{% for user in users if loop.index <= 10 %}
    {{ loop.index }}
{%- endfor %}

{% if kenny.sick %}
    Kenny is sick.
{% elif kenny.dead %}
    You killed Kenny!  You bastard!!!
{% else %}
    Kenny looks okay --- so far
{% endif %}

{% filter upper %}
    This text becomes uppercase
{% endfilter %}

{% set navigation = [('index.html', 'Index'), ('about.html', 'About')] %}
{% set key, value = call_something() %}

{{ '[%s]' % page.title if page.title is defined else 'undefined' }}