Prerequisites

Ensure Java runtime is available before proceeding.

yum -y install java-1.8.0-openjdk

Fetching and Installing Elasticsearch

Retrieve the package and install via RPM.

wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.10.1-x86_64.rpm
rpm -ivh elasticsearch-7.10.1-x86_64.rpm

Service Initialization and Startup

Reload service definitions and configure automatic startup.

systemctl daemon-reload
systemctl enable elasticsearch
systemctl start elasticsearch
systemctl status elasticsearch

Cluster and Node Settings

Edit /etc/elasticsearch/elasticsearch.yml with the following parameters:

cluster.name: search-cluster
node.name: primary-node
path.data: /mnt/data/es
path.logs: /var/log/elasticsearch
bootstrap.memory_lock: true
network.host: 10.0.1.129
http.port: 9200
http.cors.enabled: true
http.cors.allow-origin: "*"
cluster.initial_master_nodes: ["primary-node"]

Apply filesystem changes and adjust ownership:

mkdir -p /mnt/data/es
chown -R elasticsearch:elasticsearch /mnt/data/es
systemctl restart elasticsearch
systemctl status elasticsearch

Memory locking may cause startup failure. To resolve, raise the memlock limit for the service.

Either invoke an override:

systemctl edit elasticsearch

Or modify the unit file directly:

vim /usr/lib/systemd/system/elasticsearch.service

Append with in the [Service] section:

LimitMEMLOCK=infinity

Refresh systemd and relaunch the process:

systemctl daemon-reload
systemctl restart elasticsearch

Monitor logs using the cluster-specific logfile:

tailf /var/log/elasticsearch/search-cluster.log

Optional Plugin Setup

Navigate to the binary directory of Elastiscearch:

cd /usr/share/elasticsearch/bin

Install the ICU analysis plugin:

./elasticsearch-plugin install analysis-icu
./elasticsearch-plugin list