ES two node cluster doubt

Suryadip_Nag · May 16, 2019, 12:50pm

If there is two node with two different ip in ES cluster setup then the indexing request will go to only master node and the data will be indexed to master node and not in the other node?

If yes then how the other node gets the indexed data?

DavidTurner · May 16, 2019, 1:10pm

No, the master node is normally not involved in indexing at all. The data is indexed into the primary and all replicas. Perhaps this section of the docs is helpful?

Suryadip_Nag · May 16, 2019, 1:15pm

Okay thanks for the info.. One last doubt,
Without mentioning the other host nodes ip in discovery.zen.ping.unicast.hosts in elasticsearch.yml file is there any other option so that the node will be joined and form a cluster?

DavidTurner · May 16, 2019, 5:40pm

I'm not quite sure how to answer this yet. Can you explain why you need another option?

Suryadip_Nag · May 17, 2019, 6:08am

We are using the following java class in our project downloaded from open source ES code repository.

github.com

elastic/elasticsearch/blob/5.5/plugins/discovery-file/src/main/java/org/elasticsearch/discovery/file/FileBasedUnicastHostsProvider.java

/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.elasticsearch.discovery.file;

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This FileBasedUnicastHostsProvider.java file has the code which I believe picking up the hosts from /etc/hosts in Linux and automatically joining the nodes..It was working till ES5.5. We didn't need to mention the other nodes ip in discovery.zen.ping.unicast.hosts . But we have upgraded to 6.5 and we noticed in the ES source code repo, that java file is no longer available so we deleted that java file in our project as well.

Now nodes are not joining cluster unless we mention the other nodes ip in discovery.zen.ping.unicast.hosts.

Any idea about this FileBasedUnicastHostsProvider.java file ?

DavidTurner · May 17, 2019, 6:52pm

I don't understand. This class is part of Elasticsearch and is not suitable for use in other projects.

system · June 14, 2019, 6:52pm

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