blob: df6cf7b28c8890e5052135442d053f42289542c7 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
Including and Importing
=======================
.. contents:: Topics
Includes vs. Imports
````````````````````
As noted in :doc:`playbooks_reuse`, include and import statements are very similar, however the Ansible executor engine treats them very differently.
- All ``import*`` statements are pre-processed at the time playbooks are parsed.
- All ``include*`` statements are processed as they encountered during the execution of the playbook.
Please refer to :doc:`playbooks_reuse` for documentation concerning the trade-offs one may encounter when using each type.
Also be aware that this behaviour changed in 2.4; prior to that Ansible version only ``include`` was available, and it behaved differently depending on context.
.. versionadded:: 2.4
Importing Playbooks
```````````````````
It is possible to include playbooks inside a master playbook. For example::
---
- import_playbook: webservers.yml
- import_playbook: databases.yml
The plays and tasks in each playbook listed will be run in the order they are listed, just as if they had been defined here directly.
Prior to 2.4 only ``include`` was available and worked for both playbooks and tasks as both import and include.
.. versionadded:: 2.4
Including and Importing Task Files
``````````````````````````````````
Use of included task lists is a great way to define a role that system is going to fulfill. A task include file simply contains a flat list of tasks::
# common_tasks.yml
---
- name: placeholder foo
command: /bin/foo
- name: placeholder bar
command: /bin/bar
You can then use ``import_tasks`` or ``include_tasks`` to include this file in your main task list::
tasks:
- import_tasks: common_tasks.yml
# or
- include_tasks: common_tasks.yml
You can also pass variables into imports and includes::
tasks:
- import_tasks: wordpress.yml wp_user=timmy
- import_tasks: wordpress.yml wp_user=alice
- import_tasks: wordpress.yml wp_user=bob
Variables can also be passed to include files using an alternative syntax, which also supports structured variables like dictionaries and lists::
tasks:
- include_tasks: wordpress.yml
vars:
wp_user: timmy
ssh_keys:
- "{{ lookup('file', 'keys/one.pub') }}"
- "{{ lookup('file', 'keys/two.pub') }}"
Using either syntax, variables passed in can then be used in the included files. These variables will only be available to tasks within the included file. See :ref:`variable_precedence` for more details on variable inheritance and precedence.
Task include statements can be used at arbitrary depth.
.. note::
Static and dynamic can be mixed, however this is not recommended as it may lead to difficult-to-diagnose bugs in your playbooks.
Includes and imports can also be used in the ``handlers:`` section; for instance, if you want to define how to restart apache, you only have to do that once for all of your playbooks. You might make a handlers.yml that looks like::
# more_handlers.yml
---
- name: restart apache
service: name=apache state=restarted
And in your main playbook file::
handlers:
- include_tasks: more_handlers.yml
# or
- import_tasks: more_handlers.yml
.. note::
Be sure to refer to the limitations/trade-offs for handlers noted in :doc:`playbooks_reuse`.
You can mix in includes along with your regular non-included tasks and handlers.
Including and Importing Roles
`````````````````````````````
Please refer to :doc:`playbooks_reuse_roles` for details on including and importing roles.
.. seealso::
:doc:`YAMLSyntax`
Learn about YAML syntax
:doc:`playbooks`
Review the basic Playbook language features
:doc:`playbooks_best_practices`
Various tips about managing playbooks in the real world
:doc:`playbooks_variables`
All about variables in playbooks
:doc:`playbooks_conditionals`
Conditionals in playbooks
:doc:`playbooks_loops`
Loops in playbooks
:doc:`modules`
Learn about available modules
:doc:`dev_guide/developing_modules`
Learn how to extend Ansible by writing your own modules
`GitHub Ansible examples <https://github.com/ansible/ansible-examples>`_
Complete playbook files from the GitHub project source
`Mailing List <http://groups.google.com/group/ansible-project>`_
Questions? Help? Ideas? Stop by the list on Google Groups
|
