add handling of rsyslog in cloud-config

This adds the following cloud-config keys:
 - 'rsyslog_dir' default: /etc/rsyslog.d
 - 'rsyslog_filename' default: 20-cloud-config.conf
 - 'rsyslog' (list) default: empty

1 files changed, 86 insertions, 0 deletions

diff --git a/cloudinit/CloudConfig/cc_rsyslog.py b/cloudinit/CloudConfig/cc_rsyslog.py
new file mode 100644
index 00000000..53fa1d23
--- /dev/null
+++ b/cloudinit/CloudConfig/cc_rsyslog.py
@@ -0,0 +1,86 @@
+# vi: ts=4 expandtab syntax=python
+#
+#    Copyright (C) 2009-2010 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/>.
+import cloudinit
+import logging
+import cloudinit.util as util
+import subprocess
+import traceback
+
+DEF_FILENAME = "20-cloud-config.conf"
+DEF_DIR = "/etc/rsyslog.d"
+
+def handle(name,cfg,cloud,log,args):
+    # rsyslog:
+    #  - "*.* @@192.158.1.1"
+    #  - content: "*.*   @@192.0.2.1:10514"
+    #  - filename: 01-examplecom.conf
+    #    content: |
+    #      *.*   @@syslogd.example.com
+
+    # process 'rsyslog'
+    if not 'rsyslog' in cfg: return True
+
+    def_dir = cfg.get('rsyslog_dir', DEF_DIR)
+    def_fname = cfg.get('rsyslog_filename', DEF_FILENAME)
+
+    entries = cfg['rsyslog']
+
+    files = [ ]
+    elst = [ ]
+    for ent in cfg['rsyslog']:
+        if isinstance(ent,dict):
+            if not "content" in ent:
+                elst.append((ent, "no 'content' entry"))
+                continue
+            content = ent['content']
+            filename = ent.get("filename", def_fname)
+        else:
+            content = ent
+            filename = def_fname
+
+        if not filename.startswith("/"):
+            filename = "%s/%s" % (def_dir,filename)
+
+        omode = "ab"
+        # truncate filename first time you see it
+        if filename not in files:
+            omode = "wb"
+            files.append(filename)
+
+        try:
+            util.write_file(filename, content + "\n", omode=omode)
+        except Exception, e:
+            log.debug(traceback.format_exc(e))
+            elst.append((content, "failed to write to %s" % filename))
+
+    # need to restart syslogd
+    try:
+        log.debug("restarting rsyslog")
+        p = util.subp(['service', 'rsyslog', 'restart'])
+    except Exception, e:
+        elst.append(("restart", str(e)))
+    
+    for e in elst:
+        log.warn("rsyslog error: %s\n" % ':'.join(e))
+        return False
+
+    cloudinit.logging_set_from_cfg_file()
+    log = logging.getLogger()
+    log.debug("rsyslog configured %s" % files)
+
+    return True