1 files changed, 102 insertions, 0 deletions
diff --git a/cloudinit/config/cc_rightscale_userdata.py b/cloudinit/config/cc_rightscale_userdata.py
new file mode 100644
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+++ b/cloudinit/config/cc_rightscale_userdata.py
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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.warn("Failed to get raw userdata in transform %s", name)
+        return
+
+    try:
+        mdict = parse_qs(ud)
+        if not mdict or not MY_HOOKNAME in mdict:
+            log.debug(("Skipping transform %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 transform 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]