It seems, you tell Graylog to connect to the 10.x.x.x IP, whereas Elasticsearch binds to 127.0.0.1, therefore it listens on that address too.
Change the elasticsearch_hosts parameter to http://127.0.0.1:9200 and it should work.
It seems, you tell Graylog to connect to the 10.x.x.x IP, whereas Elasticsearch binds to 127.0.0.1, therefore it listens on that address too.
Change the elasticsearch_hosts parameter to http://127.0.0.1:9200 and it should work.