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Docs: Clean up of 'template' module docs (#46297)

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* Docs: Clean up of 'template' module docs

* Changed influenced by review comments
This commit is contained in:
Dag Wieers 2018-10-04 05:12:25 +02:00 committed by Alicia Cozine
parent ba9348883b
commit be0dc34b6f
2 changed files with 123 additions and 129 deletions
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160
lib/ansible/modules/files/template.py
View file

@ -1,7 +1,11 @@
# this is a virtual module that is entirely implemented server side
#!/usr/bin/python
# -*- coding: utf-8 -*-
# Copyright: (c) 2017, Ansible Project
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
# This is a virtual module that is entirely implemented as an action plugin and runs on the controller
from __future__ import absolute_import, division, print_function
__metaclass__ = type
@ -13,156 +17,152 @@ DOCUMENTATION = r'''
---
module: template
version_added: historical
short_description: Templates a file out to a remote server
short_description: Template a file out to a remote server
description:
- Templates are processed by the Jinja2 templating language
(U(http://jinja.pocoo.org/docs/)) - documentation on the template
formatting can be found in the Template Designer Documentation
(U(http://jinja.pocoo.org/docs/templates/)).
- "Six additional variables can be used in templates:
C(ansible_managed) (configurable via the C(defaults) section of C(ansible.cfg)) contains a string which can be used to
describe the template name, host, modification time of the template file and the owner uid.
C(template_host) contains the node name of the template's machine.
C(template_uid) is the numeric user id of the owner.
C(template_path) is the path of the template.
C(template_fullpath) is the absolute path of the template.
C(template_run_date) is the date that the template was rendered."
- Templates are processed by the L(Jinja2 templating language,http://jinja.pocoo.org/docs/).
- Documentation on the template formatting can be found in the
L(Template Designer Documentation,http://jinja.pocoo.org/docs/templates/).
- The six additional variables, listed below, can be used in template.
- C(ansible_managed) (configurable via the C(defaults) section of C(ansible.cfg)) contains a string which can be used to
describe the template name, host, modification time of the template file and the owner uid.
- C(template_host) contains the node name of the template's machine.
- C(template_uid) is the numeric user id of the owner.
- C(template_path) is the path of the template.
- C(template_fullpath) is the absolute path of the template.
- C(template_run_date) is the date that the template was rendered.
options:
src:
description:
- Path of a Jinja2 formatted template on the Ansible controller. This can be a relative or absolute path.
required: true
- Path of a Jinja2 formatted template on the Ansible controller.
- This can be a relative or an absolute path.
required: yes
dest:
description:
- Location to render the template to on the remote machine.
required: true
- Location to render the template to on the remote machine.
required: yes
backup:
description:
- Create a backup file including the timestamp information so you can get
the original file back if you somehow clobbered it incorrectly.
- Determine whether a backup should be created.
- When set to C(yes), create a backup file including the timestamp information
so you can get the original file back if you somehow clobbered it incorrectly.
type: bool
default: 'no'
default: no
newline_sequence:
description:
- Specify the newline sequence to use for templating files.
- Specify the newline sequence to use for templating files.
choices: [ '\n', '\r', '\r\n' ]
default: '\n'
version_added: '2.4'
block_start_string:
description:
- The string marking the beginning of a block.
- The string marking the beginning of a block.
default: '{%'
version_added: '2.4'
block_end_string:
description:
- The string marking the end of a block.
- The string marking the end of a block.
default: '%}'
version_added: '2.4'
variable_start_string:
description:
- The string marking the beginning of a print statement.
- The string marking the beginning of a print statement.
default: '{{'
version_added: '2.4'
variable_end_string:
description:
- The string marking the end of a print statement.
- The string marking the end of a print statement.
default: '}}'
version_added: '2.4'
trim_blocks:
description:
- If this is set to True the first newline after a block is removed (block, not variable tag!).
- Determine when newlines should be removed from blocks.
- When set to C(yes) the first newline after a block is removed (block, not variable tag!).
type: bool
default: 'yes'
default: yes
version_added: '2.4'
lstrip_blocks:
description:
- If this is set to True leading spaces and tabs are stripped from the start of a line to a block.
Setting this option to True requires Jinja2 version >=2.7.
- Determine when leading spaces and tabs should be stripped.
- When set to C(yes) leading spaces and tabs are stripped from the start of a line to a block.
- This functionality requires Jinja v2.7 or newer.
type: bool
default: 'no'
default: no
version_added: '2.6'
force:
description:
- the default is C(yes), which will replace the remote file when contents
are different than the source. If C(no), the file will only be transferred
if the destination does not exist.
- Determine when the file is being transferred if the destination already exists.
- When set to C(yes), replace the remote file when contents are different than the source.
- When set to C(no), the file will only be transferred if the destination does not exist.
type: bool
default: 'yes'
default: yes
follow:
description:
- This flag indicates that filesystem links in the destination, if they exist, should be followed.
- Previous to Ansible 2.4, this was hardcoded as C(yes).
- Determine whether symbolic links should be followed.
- When set to C(yes) symbolic links will be followed, if they exist.
- When set to C(no) symbolic links will not be followed.
- Previous to Ansible 2.4, this was hardcoded as C(yes).
type: bool
default: 'no'
version_added: "2.4"
mode:
description:
- "Mode the file or directory should be. For those used to I(/usr/bin/chmod) remember that
modes are actually octal numbers. You must either add a leading zero so that Ansible's
YAML parser knows it is an octal number (like C(0644) or C(01777)) or quote it
(like C('644') or C('1777')) so Ansible receives a string and can do its own conversion from
string into number. Giving Ansible a number without following one of these rules will end
up with a decimal number which will have unexpected results. As of version 1.8, the mode
may be specified as a symbolic mode (for example, C(u+rwx) or C(u=rw,g=r,o=r)). As of
version 2.6, the mode may also be the special string C(preserve). C(preserve) means that
the file will be given the same permissions as the source file."
default: no
version_added: '2.4'
output_encoding:
description:
- Overrides the encoding used to write the template file defined by C(dest).
- It defaults to C('utf-8'), but any encoding supported by python can be used.
- The source template file must always be encoded using C('utf-8'), for homogeneity.
default: 'utf-8'
version_added: "2.7"
- Overrides the encoding used to write the template file defined by C(dest).
- It defaults to C(utf-8), but any encoding supported by python can be used.
- The source template file must always be encoded using C(utf-8), for homogeneity.
default: utf-8
version_added: '2.7'
notes:
- For Windows you can use M(win_template) which uses '\\r\\n' as C(newline_sequence).
- Including a string that uses a date in the template will result in the template being marked 'changed' each time
- "Since Ansible version 0.9, templates are loaded with C(trim_blocks=True)."
- "Also, you can override jinja2 settings by adding a special header to template file.
i.e. C(#jinja2:variable_start_string:'[%', variable_end_string:'%]', trim_blocks: False)
which changes the variable interpolation markers to [% var %] instead of {{ var }}.
This is the best way to prevent evaluation of things that look like, but should not be Jinja2.
raw/endraw in Jinja2 will not work as you expect because templates in Ansible are recursively evaluated."
- You can use the C(copy) module with the C(content:) option if you prefer the template inline,
as part of the playbook.
- Including a string that uses a date in the template will result in the template being marked 'changed' each time.
- Since Ansible version 0.9, templates are loaded with C(trim_blocks=True).
- >
Also, you can override jinja2 settings by adding a special header to template file.
i.e. C(#jinja2:variable_start_string:'[%', variable_end_string:'%]', trim_blocks: False)
which changes the variable interpolation markers to C([% var %]) instead of C({{ var }}).
This is the best way to prevent evaluation of things that look like, but should not be Jinja2.
- Using raw/endraw in Jinja2 will not work as you expect because templates in Ansible are recursively
evaluated.
- You can use the M(copy) module with the C(content:) option if you prefer the template inline,
as part of the playbook.
- For Windows you can use M(win_template) which uses '\\r\\n' as C(newline_sequence) by default.
author:
- Ansible Core Team
- Michael DeHaan
- Ansible Core Team
- Michael DeHaan
extends_documentation_fragment:
- files
- validate
- files
- validate
'''
EXAMPLES = r'''
# Example from Ansible Playbooks
- template:
- name: Template a file to /etc/files.conf
template:
src: /mytemplates/foo.j2
dest: /etc/file.conf
owner: bin
group: wheel
mode: 0644
mode: '0644'
# The same example, but using symbolic modes equivalent to 0644
- template:
- name: Template a file, using symbolic modes (equivalent to 0644)
template:
src: /mytemplates/foo.j2
dest: /etc/file.conf
owner: bin
group: wheel
mode: "u=rw,g=r,o=r"
# Create a DOS-style text file from a template
- template:
- name: Create a DOS-style text file from a template
template:
src: config.ini.j2
dest: /share/windows/config.ini
newline_sequence: '\r\n'
# Copy a new "sudoers" file into place, after passing validation with visudo
- template:
- name: Copy a new sudoers file into place, after passing validation with visudo
template:
src: /mine/sudoers
dest: /etc/sudoers
validate: '/usr/sbin/visudo -cf %s'
# Update sshd configuration safely, avoid locking yourself out
- template:
- name: Update sshd configuration safely, avoid locking yourself out
template:
src: etc/ssh/sshd_config.j2
dest: /etc/ssh/sshd_config
owner: root

92
lib/ansible/utils/module_docs_fragments/files.py
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@ -1,19 +1,5 @@
# (c) 2014, Matt Martz <matt@sivel.net>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
# Copyright: (c) 2014, Matt Martz <matt@sivel.net>
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
class ModuleDocFragment(object):
@ -22,56 +8,64 @@ class ModuleDocFragment(object):
# Note: mode is overridden by the copy and template modules so if you change the description
# here, you should also change it there.
DOCUMENTATION = """
DOCUMENTATION = r'''
options:
mode:
description:
- "Mode the file or directory should be. For those used to I(/usr/bin/chmod) remember that modes are actually octal numbers.
You must either add a leading zero so that Ansible's YAML parser knows it is an octal
number (like C(0644) or C(01777)) or quote it (like C('644') or C('1777')) so Ansible
receives a string and can do its own conversion from string into number. Giving Ansible a number
without following one of these rules will end up with a decimal number which will have unexpected results.
As of version 1.8, the mode may be specified as a symbolic mode (for example, C(u+rwx) or C(u=rw,g=r,o=r))."
- The permissions the resulting file or directory should have.
- For those used to I(/usr/bin/chmod) remember that modes are actually octal numbers.
You must either add a leading zero so that Ansible's YAML parser knows it is an octal number
(like C(0644) or C(01777)) or quote it (like C('644') or C('1777')) so Ansible receives
a string and can do its own conversion from string into number.
- Giving Ansible a number without following one of these rules will end up with a decimal
number which will have unexpected results.
- As of version 1.8, the mode may be specified as a symbolic mode (for example, C(u+rwx) or
C(u=rw,g=r,o=r)).
- As of version 2.6, the mode may also be the special string C(preserve).
- When set to C(preserve) the file will be given the same permissions as the source file.
owner:
description:
- Name of the user that should own the file/directory, as would be fed to I(chown).
- Name of the user that should own the file/directory, as would be fed to I(chown).
group:
description:
- Name of the group that should own the file/directory, as would be fed to I(chown).
- Name of the group that should own the file/directory, as would be fed to I(chown).
seuser:
description:
- User part of SELinux file context. Will default to system policy, if
applicable. If set to C(_default), it will use the C(user) portion of the
policy if available.
- The user part of the SELinux file context.
- By default it uses the C(system) policy, where applicable.
- When set to C(_default), it will use the C(user) portion of the policy if available.
serole:
description:
- Role part of SELinux file context, C(_default) feature works as for I(seuser).
- The role part of the SELinux file context.
- When set to C(_default), it will use the C(role) portion of the policy if available.
setype:
description:
- Type part of SELinux file context, C(_default) feature works as for I(seuser).
- The type part of the SELinux file context.
- When set to C(_default), it will use the C(type) portion of the policy if available.
selevel:
description:
- Level part of the SELinux file context. This is the MLS/MCS attribute,
sometimes known as the C(range). C(_default) feature works as for
I(seuser).
default: "s0"
- The level part of the SELinux file context.
- This is the MLS/MCS attribute, sometimes known as the C(range).
- When set to C(_default), it will use the C(level) portion of the policy if available.
default: s0
unsafe_writes:
description:
- By default this module uses atomic operations to prevent data
corruption or inconsistent reads from the target files,
but sometimes systems are configured or just broken in ways that prevent this. One example is docker mounted files,
which cannot be updated atomically from inside the container and can only be written in an unsafe manner.
- This option allows Ansible to fall back to unsafe methods of
updating files when atomic operations fail (however, it doesn't force Ansible to perform unsafe writes).
IMPORTANT! Unsafe writes are subject to race conditions and can lead to data corruption.
- Influence when to use atomic operation to prevent data corruption or inconsistent reads from the target file.
- By default this module uses atomic operations to prevent data corruption or inconsistent reads from the target files,
but sometimes systems are configured or just broken in ways that prevent this. One example is docker mounted files,
which cannot be updated atomically from inside the container and can only be written in an unsafe manner.
- This option allows Ansible to fall back to unsafe methods of updating files when atomic operations fail
(however, it doesn't force Ansible to perform unsafe writes).
- IMPORTANT! Unsafe writes are subject to race conditions and can lead to data corruption.
type: bool
default: 'no'
version_added: "2.2"
default: no
version_added: '2.2'
attributes:
description:
- Attributes the file or directory should have. To get supported flags look at the man page for I(chattr) on the target system.
This string should contain the attributes in the same order as the one displayed by I(lsattr).
- C(=) operator is assumed as default, otherwise C(+) or C(-) operators need to be included in the string.
aliases: ['attr']
version_added: "2.3"
"""
- The attributes the resulting file or directory should have.
- To get supported flags look at the man page for I(chattr) on the target system.
- This string should contain the attributes in the same order as the one displayed by I(lsattr).
- The C(=) operator is assumed as default, otherwise C(+) or C(-) operators need to be included in the string.
aliases: [ attr ]
version_added: '2.3'
'''