Pass log_level config parameter to logging module.

graphios.cfg

@@ -18,6 +18,9 @@ log_file = /usr/local/nagios/var/graphios.log
 # max log size in megabytes (it will rotate the files)
 log_max_size = 24
 
+# available log levels:
+# DEBUG, INFO, WARNING, ERROR, CRITICAL
+# see https://docs.python.org/2/library/logging.html#logging-levels for details
 # DEBUG is quite verbose
 #log_level = logging.DEBUG
 log_level = logging.INFO

graphios.py

@@ -70,6 +70,15 @@
 # backend global
 be = ""
 
+# available loglevels for graphios.cfg
+loglevels = {
+    'logging.DEBUG':    logging.DEBUG,
+    'logging.INFO':     logging.INFO,
+    'logging.WARNING':  logging.WARNING,
+    'logging.ERROR':    logging.ERROR,
+    'logging.CRITICAL': logging.CRITICAL
+}
+
 # options parsing
 parser = OptionParser("""usage: %prog [options]
 sends nagios performance data to carbon.
@@ -233,6 +242,11 @@ def verify_config(config_dict):
         for value in missing_values:
             print "%s\n" % value
         sys.exit(1)
+    if not config_dict['log_level'] in loglevels.keys():
+        print "Unknown loglevel: " + config_dict['log_level'] + '\n'
+        print "Available loglevels:"
+        print '\n'.join(sorted(loglevels.keys()))
+        sys.exit(1)
     if "spool_directory" in config_dict:
         spool_directory = config_dict['spool_directory']
 
@@ -326,13 +340,13 @@ def configure():
     log_handler.setFormatter(formatter)
     log.addHandler(log_handler)
 
-    if "debug" in cfg and cfg["debug"] is True:
+    if cfg.get("debug") is True or cfg['log_level'] == 'logging.DEBUG':
         log.debug("adding streamhandler")
         log.setLevel(logging.DEBUG)
         log.addHandler(logging.StreamHandler())
         debug = True
     else:
-        log.setLevel(logging.INFO)
+        log.setLevel(loglevels[cfg['log_level']])
         debug = False