/usr/lib/python2.7/dist-packages/metadataserver/commissioning/user_data.py is in python-django-maas 1.5.4+bzr2294-0ubuntu1.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | # Copyright 2012-2013 Canonical Ltd. This software is licensed under the
# GNU Affero General Public License version 3 (see the file LICENSE).
"""Generate commissioning user-data from template and code snippets.
This combines the `user_data.template` and the snippets of code in the
`snippets` directory into the main commissioning script.
Its contents are not customizable. To inject custom code, use the
:class:`CommissioningScript` model.
"""
from __future__ import (
absolute_import,
print_function,
unicode_literals,
)
str = None
__metaclass__ = type
__all__ = [
'generate_user_data',
]
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
import os.path
from maasserver.preseed import get_preseed_context
from metadataserver.commissioning.snippets import (
get_snippet_context,
get_userdata_template_dir,
)
import tempita
ENCODING = 'utf-8'
def generate_user_data(nodegroup=None):
"""Produce the main commissioning script.
The main template file contains references to so-called ``snippets''
which are read in here, and substituted. In addition, the regular
preseed context variables are available (such as 'http_proxy').
The final result is a MIME multipart message that consists of a
'cloud-config' part and an 'x-shellscript' part. This allows maximum
flexibility with cloud-init as we read in a template
'user_data_config.template' to set cloud-init configs before the script
is run.
:rtype: `bytes`
"""
commissioning_dir = get_userdata_template_dir()
userdata_template_file = os.path.join(
commissioning_dir, 'user_data.template')
config_template_file = os.path.join(
commissioning_dir, 'user_data_config.template')
userdata_template = tempita.Template.from_filename(
userdata_template_file, encoding=ENCODING)
config_template = tempita.Template.from_filename(
config_template_file, encoding=ENCODING)
# The preseed context is a dict containing various configs that the
# templates can use.
preseed_context = get_preseed_context(nodegroup=nodegroup)
# Render the snippets in the main template.
snippets = get_snippet_context(encoding=ENCODING)
snippets.update(preseed_context)
userdata = userdata_template.substitute(snippets).encode(ENCODING)
# Render the config.
config = config_template.substitute(preseed_context)
# Create a MIME multipart message from the config and the userdata.
config_part = MIMEText(config, 'cloud-config', ENCODING)
config_part.add_header(
'Content-Disposition', 'attachment; filename="config"')
data_part = MIMEText(userdata, 'x-shellscript', ENCODING)
data_part.add_header(
'Content-Disposition', 'attachment; filename="user_data.sh"')
combined = MIMEMultipart()
combined.attach(config_part)
combined.attach(data_part)
return combined.as_string()
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