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# vi: ts=4 expandtab
#
# Copyright (C) 2011 Canonical Ltd.
# Copyright (C) 2012 Hewlett-Packard Development Company, L.P.
#
# Author: Scott Moser <scott.moser@canonical.com>
# Author: Juerg Haefliger <juerg.haefliger@hp.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3, as
# published by the Free Software Foundation.
#
# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
##
## The purpose of this script is to allow cloud-init to consume
## rightscale style userdata. rightscale user data is key-value pairs
## in a url-query-string like format.
##
## for cloud-init support, there will be a key named
## 'CLOUD_INIT_REMOTE_HOOK'.
##
## This cloud-config module will
## - read the blob of data from raw user data, and parse it as key/value
## - for each key that is found, download the content to
## the local instance/scripts directory and set them executable.
## - the files in that directory will be run by the user-scripts module
## Therefore, this must run before that.
##
##
import os
from cloudinit import url_helper as uhelp
from cloudinit import util
from cloudinit.settings import PER_INSTANCE
from urlparse import parse_qs
frequency = PER_INSTANCE
MY_NAME = "cc_rightscale_userdata"
MY_HOOKNAME = 'CLOUD_INIT_REMOTE_HOOK'
def handle(name, _cfg, cloud, log, _args):
try:
ud = cloud.get_userdata_raw()
except:
log.debug("Failed to get raw userdata in module %s", name)
return
try:
mdict = parse_qs(ud)
if not mdict or not MY_HOOKNAME in mdict:
log.debug(("Skipping module %s, "
"did not find %s in parsed"
" raw userdata"), name, MY_HOOKNAME)
return
except:
util.logexc(log, ("Failed to parse query string %s"
" into a dictionary"), ud)
raise
wrote_fns = []
captured_excps = []
# These will eventually be then ran by the cc_scripts_user
# TODO: maybe this should just be a new user data handler??
# Instead of a late module that acts like a user data handler?
scripts_d = cloud.get_ipath_cur('scripts')
urls = mdict[MY_HOOKNAME]
for (i, url) in enumerate(urls):
fname = os.path.join(scripts_d, "rightscale-%02i" % (i))
try:
resp = uhelp.readurl(url)
# Ensure its a valid http response (and something gotten)
if resp.ok() and resp.contents:
util.write_file(fname, str(resp), mode=0700)
wrote_fns.append(fname)
except Exception as e:
captured_excps.append(e)
util.logexc(log, "%s failed to read %s and write %s",
MY_NAME, url, fname)
if wrote_fns:
log.debug("Wrote out rightscale userdata to %s files", len(wrote_fns))
if len(wrote_fns) != len(urls):
skipped = len(urls) - len(wrote_fns)
log.debug("%s urls were skipped or failed", skipped)
if captured_excps:
log.warn("%s failed with exceptions, re-raising the last one",
len(captured_excps))
raise captured_excps[-1]
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