fetch.py

# this is a virtual module that is entirely implemented server side

# 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/>.

DOCUMENTATION = '''
---
module: fetch
short_description: Fetches a file from remote nodes
description:
     - This module works like M(copy), but in reverse. It is used for fetching
       files from remote machines and storing them locally in a file tree,
       organized by hostname. Note that this module is written to transfer
       log files that might not be present, so a missing remote file won't
       be an error unless fail_on_missing is set to 'yes'.
version_added: "0.2"
options:
  src:
    description:
      - The file on the remote system to fetch. This I(must) be a file, not a
        directory. Recursive fetching may be supported in a later release.
    required: true
    default: null
    aliases: []
  dest:
    description:
      - A directory to save the file into. For example, if the I(dest)
        directory is C(/backup) a I(src) file named C(/etc/profile) on host
        C(host.example.com), would be saved into
        C(/backup/host.example.com/etc/profile)
    required: true
    default: null
  fail_on_missing:
    version_added: "1.1"
    description:
      - When set to 'yes', the task will fail if the source file is missing.
    required: false
    choices: [ "yes", "no" ]
    default: "no"
  validate_checksum:
    version_added: "1.4"
    description:
      - Verify that the source and destination checksums match after the files are fetched.
    required: false
    choices: [ "yes", "no" ]
    default: "yes"
    aliases: [ "validate_md5" ]
  flat:
    version_added: "1.2"
    description:
      - Allows you to override the default behavior of appending
        hostname/path/to/file to the destination.  If dest ends with '/', it
        will use the basename of the source file, similar to the copy module.
        Obviously this is only handy if the filenames are unique.
requirements: []
author: 
    - "Ansible Core Team"
    - "Michael DeHaan"
notes:
    - When running fetch with C(become), the M(slurp) module will also be
      used to fetch the contents of the file for determining the remote
      checksum. This effectively doubles the transfer size, and
      depending on the file size can consume all available memory on the
      remote or local hosts causing a C(MemoryError). Due to this it is
      advisable to run this module without C(become) whenever possible.
'''

EXAMPLES = '''
# Store file into /tmp/fetched/host.example.com/tmp/somefile
- fetch: src=/tmp/somefile dest=/tmp/fetched

# Specifying a path directly
- fetch: src=/tmp/somefile dest=/tmp/prefix-{{ inventory_hostname }} flat=yes

# Specifying a destination path
- fetch: src=/tmp/uniquefile dest=/tmp/special/ flat=yes

# Storing in a path relative to the playbook
- fetch: src=/tmp/uniquefile dest=special/prefix-{{ inventory_hostname }} flat=yes
'''