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# vi: ts=4 expandtab
#
# Copyright (C) 2011 Canonical Ltd.
#
# Author: Scott Moser <scott.moser@canonical.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 cloudinit.util as util
from cloudinit.CloudConfig import per_instance
from cloudinit import get_ipath_cur
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.warn("failed to get raw userdata in %s" % my_name)
return
try:
mdict = parse_qs(ud)
if not my_hookname in mdict:
return
except:
log.warn("failed to urlparse.parse_qa(userdata_raw())")
raise
scripts_d = get_ipath_cur('scripts')
i = 0
first_e = None
for url in mdict[my_hookname]:
fname = "%s/rightscale-%02i" % (scripts_d, i)
i = i +1
try:
content = util.readurl(url)
util.write_file(fname, content, mode=0700)
except Exception as e:
if not first_e:
first_e = None
log.warn("%s failed to read %s: %s" % (my_name, url, e))
if first_e:
raise(e)
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