add initial logging support

This logging infrastructure in cloudinit:
- uses python logging
- allows user supplied config of logging.config.fileConfig format to be
  supplied in /etc/cloud/cloud.cfg or in cloud_config by user data.
- by default, tries to use syslog, if that is not available, writes directly to
  /var/log/cloud-init.log (syslog will not be available yet when cloud-init
  runs)
- when using syslog, the doc/21-cloudinit.conf file provides a rsyslogd
  file to be placed in /etc/rsyslog.d/ that will file [CLOUDINIT] messages
  to /var/log/cloud-init.log

1 files changed, 4 insertions, 0 deletions

diff --git a/cloud-init-run-module.py b/cloud-init-run-module.py
index f7299f46..4ec79ff9 100755
--- a/cloud-init-run-module.py
+++ b/cloud-init-run-module.py
@@ -19,6 +19,7 @@
 
 import sys
 import cloudinit
+import logging
 
 def Usage(out = sys.stdout):
     out.write("Usage: cloud-init-run-module freq sem-name mod-name [args]\n")
@@ -33,6 +34,9 @@ def main():
     (freq,semname,modname)=sys.argv[1:4]
     run_args=sys.argv[4:]
 
+    cloudinit.logging_set_from_cfg_file()
+    log = logging.getLogger()
+    log.info("cloud-init-run-module %s" % sys.argv[1:])
     cloud = cloudinit.CloudInit()
     try:
         cloud.get_data_source()