Improve error message when export error occures

conf/glances.conf

@@ -524,6 +524,7 @@ port=8125
 # Configuration for the --export elasticsearch option
 # Data are available via the ES RESTful API. ex: URL/<index>/cpu
 # https://www.elastic.co
+scheme=http
 host=localhost
 port=9200
 index=glances

glances/exports/glances_elasticsearch.py

@@ -31,7 +31,7 @@ class Export(GlancesExport):
         self.index = None
 
         # Load the ES configuration file
-        self.export_enable = self.load_conf('elasticsearch', mandatories=['host', 'port', 'index'], options=[])
+        self.export_enable = self.load_conf('elasticsearch', mandatories=['scheme', 'host', 'port', 'index'], options=[])
         if not self.export_enable:
             sys.exit(2)
 
@@ -44,12 +44,22 @@ class Export(GlancesExport):
             return None
 
         try:
-            es = Elasticsearch(hosts=['{}:{}'.format(self.host, self.port)])
+            es = Elasticsearch(hosts=['{}://{}:{}'.format(self.scheme, self.host, self.port)])
         except Exception as e:
-            logger.critical("Cannot connect to ElasticSearch server %s:%s (%s)" % (self.host, self.port, e))
+            logger.critical("Cannot connect to ElasticSearch server %s://%s:%s (%s)" % (self.scheme,
+                                                                                        self.host,
+                                                                                        self.port, e))
+            sys.exit(2)
+
+        if not es.ping():
+            logger.critical("Cannot ping the ElasticSearch server %s://%s:%s" % (self.scheme,
+                                                                                 self.host,
+                                                                                 self.port))
             sys.exit(2)
         else:
-            logger.info("Connected to the ElasticSearch server %s:%s" % (self.host, self.port))
+            logger.info("Connected to the ElasticSearch server %s://%s:%s" % (self.scheme,
+                                                                              self.host,
+                                                                              self.port))
 
         return es
 

glances/exports/glances_graphite.py

@@ -12,7 +12,6 @@
 import sys
 from numbers import Number
 
-from glances.compat import range
 from glances.logger import logger
 from glances.exports.glances_export import GlancesExport
 
@@ -80,7 +79,6 @@ class Export(GlancesExport):
             client = None
         else:
             logger.info("Stats will be exported to Graphite server: {}:{}".format(self.host, self.port))
-
         return client
 
     def export(self, name, columns, points):

glances/exports/glances_rabbitmq.py

@@ -72,8 +72,8 @@ class Export(GlancesExport):
             channel = connection.channel()
             return channel
         except Exception as e:
-            logger.critical("Connection to rabbitMQ failed : %s " % e)
-            return None
+            logger.critical("Connection to rabbitMQ server %s:%s failed. %s" % (self.host, self.port, e))
+            sys.exit(2)
 
     def export(self, name, columns, points):
         """Write the points in RabbitMQ."""