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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

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Path Info

Level
Clock icon Intermediate
Duration
Clock icon 2h 0m
Published
Clock icon Jul 17, 2020

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Table of Contents

  1. 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

  2. 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"]

  3. 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

  4. 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
A Cloud Guru - Labs - Deploy a Multi-Node Elasticsearch Cluster
Author
A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

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