Adding New Node to a Cluster

Ensure that you have shutdown API Gateway and Elasticsearch.

This section explains how to add a new node to a cluster. For example, consider that a new node, node 4, is added to a cluster that already has three nodes in it.

You have to edit the values of the following properties to add a new node:

discovery.seed_hosts

cluster.initial_master_nodes

For information on the properties, see https://www.elastic.co/guide/en/elasticsearch/reference/current/discovery-settings.html.

To add new node to a cluster

1. Open elasticsearch.yml from SAG_root/InternalDataStore/config/elasticsearch.yml from the system where the new node is being added.

The following configuration is a sample of how the configuration appears initially.

cluster.name:"SAG_EventDataStore"
node.name: node4
path.logs: SAG_root\InternalDataStore/logs
network.host:0.0.0.0
http.port:9240
discovery.seed_hosts: ["node1:9340","node2:9340","node3":"9340"]
transport.tcp.port:9340
path.repo:['SAG_root\InternalDataStore/archives']
cluster.initial_master_nodes:["node1","node2","node3"]

2. Provide the name of the node and port number used by the node in the discovery.seed_hosts property in the following format:

host:port

For example

node4:9240

3. Provide the name of the new node in the cluster.initial_master_nodes property.

For example

node4

After providing the new node details, the configuration look like following:

cluster.name:"SAG_EventDataStore"
node.name: node4
path.logs: SAG_root\InternalDataStore/logs
network.host:0.0.0.0
http.port:9240
discovery.seed_hosts: ["node1:9340","node2:9340","node3":"9340","node4:9340"]
transport.tcp.port:9340
path.repo:['SAG_root\InternalDataStore/archives']
cluster.initial_master_nodes:["node1","node2","node3","node4"]

4. Save the configuration.

The new node is added to the cluster.