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- Cloud

Deploy a Multi-Node Elasticsearch Cluster
Before we can get hands-on with indexing, searching, and aggregating our data with Elasticsearch, we first need to know how to prepare a system and how to deploy and configure Elasticsearch. In this hands-on lab, you will deploy a 3-node Elasticsearch cluster with a specific set of configuration requirements. Specifically, you will: * Deploy Elasticsearch from an RPM * Specify Elasticsearch cluster and node names * Create custom attributes for Elasticsearch nodes * Assign Elasticsearch node roles * Configure the Elasticsearch Java virtual machine (JVM) heap * Bind Elasticsearch to specific network addresses * Configure Elasticsearch node discovery * Configure Elasticsearch cluster bootstrap * Start Elasticsearch * Inspect Elasticsearch cluster logs * `curl` the Elasticsearch node APIs to check status and configuration

Lab Info
Table of Contents
-
Challenge
Install Elasticsearch on each node.
Using the Secure Shell (SSH), log in to each node as
cloud_user
via the public IP address.Become the
root
user with:sudo su -
Import the Elastic GPG key:
rpm --import https://artifacts.elastic.co/GPG-KEY-elasticsearch
Download the Elasticsearch 7.6 RPM:
curl -O https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.6.0-x86_64.rpm
Install Elasticsearch:
rpm --install elasticsearch-7.6.0-x86_64.rpm
Configure Elasticsearch to start on system boot:
systemctl start elasticsearch.service systemctl enable elasticsearch
-
Challenge
Configure each node's elasticsearch.yml per instructions.
Log in to each node and become the
root
user:sudo su -
Open the
elasticsearch.yml
file:vim /etc/elasticsearch/elasticsearch.yml
Change the following line:
#cluster.name: my-application
to
cluster.name: cluster-1
Change the following line on master-1:
#node.name: node-1
to
node.name: master-1
Change the following line on data-1:
#node.name: node-1
to
node.name: data-1
Change the following line on data-2:
#node.name: node-1
to
node.name: data-2
Change the following line on data-1:
#node.attr.rack: r1
to
node.attr.temp: hot
Change the following line on data-2:
#node.attr.rack: r1
to
node.attr.temp: warm
Add the following lines on master-1:
node.master: true node.data: false node.ingest: false node.ml: false
Add the following lines on data-1:
node.master: false node.data: true node.ingest: true node.ml: false
Add the following lines on data-2:
node.master: false node.data: true node.ingest: true node.ml: false
Change the following on each node:
#network.host: 192.168.0.1
to
network.host: [_local_, _site_]
Change the following on each node:
#discovery.seed_hosts: ["host1", "host2"]
to
discovery.seed_hosts: ["10.0.1.101"]
Change the following on each node:
#cluster.initial_master_nodes: ["node-1", "node-2"]
to
cluster.initial_master_nodes: ["master-1"]
-
Challenge
Configure the heap for each node per instructions.
Log in to the master node and become the
root
user:sudo su -
Open the
jvm.options
file:vim /etc/elasticsearch/jvm.options
Change the following lines:
-Xms1g -Xmx1g
to
-Xms768m -Xmx768m
Log in to each data node and become the
root
user:sudo su -
Open the
jvm.options
file:vim /etc/elasticsearch/jvm.options
Change the following lines:
-Xms1g -Xmx1g
to
-Xms2g -Xmx2g
-
Challenge
Start Elasticsearch on each node.
Log in to each node and become the
root
user:sudo su -
Start Elasticsearch:
systemctl start elasticsearch
Check the startup process:
less /var/log/elasticsearch/cluster-1.log
Check the node configuration:
curl localhost:9200/_cat/nodes?v
About the author
Real skill practice before real-world application
Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.
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