Add url subpath for Logsender to reach OpenSearch

It might happen, that the url for the OpenSearch is not directly
the hostname, eg.: localhost, but it also contains a subPath
for example: localhost/opensearch. In that case, the Logsender
was not able to connect to the OpenSearch.

Change-Id: I58a89c2fc33bdd06466bb60cc90fe2bd0317c92b

logscraper/logsender.conf.sample

@@ -2,6 +2,7 @@
 directory: /tmp/logscraper
 host: localhost
 port: 9200
+subpath:
 username: logstash
 password:
 index_prefix: logstash-

logscraper/logsender.py

@@ -63,6 +63,11 @@ def get_arguments():
                         "be stored.")
     parser.add_argument("--host", help="Opensearch host")
     parser.add_argument("--port", help="Opensearch port", type=int)
+    parser.add_argument("--subpath", help="Add the subpath to the host. "
+                        "That is useful, when the host url contains "
+                        "a slash(/). For example: "
+                        "'http://localhost/opensearch' then the subpath "
+                        "is 'opensearch'.")
     parser.add_argument("--username", help="Opensearch username")
     parser.add_argument("--password", help="Opensearch user password")
     parser.add_argument("--index-prefix", help="Prefix for the index.",
@@ -660,6 +665,9 @@ def get_es_client(args):
     if args.ca_file:
         es_creds['ca_certs'] = args.ca_file
 
+    if args.subpath:
+        es_creds['url_prefix'] = args.subpath
+
     es_client = OpenSearch([es_creds], timeout=60)
     logging.info("Connected to Opensearch: %s" % es_client.info())
     return es_client

logscraper/opensearch_dashboards_backup.py

@@ -87,6 +87,11 @@ def get_arguments():
     args_parser.add_argument('--port',
                              help='Opensearch port. Need to ensure that '
                              'index pattern exists before restore')
+    args_parser.add_argument("--subpath", help="Add the subpath to the host. "
+                             "That is useful, when the host url contains "
+                             "a slash(/). For example: "
+                             "'http://localhost/opensearch' then the subpath "
+                             "is 'opensearch'.")
     args_parser.add_argument('--ca-file',
                              help='Custom CA certificate file')
     args_parser.add_argument("--debug", help="Print more information",