Step-by-Step Guide: Install and Configure ElasticSearch 7.17.x Cluster on Ubuntu

Overview

This article explains how to install a binary ElasticSearch 7.17.x cluster on Ubuntu 22.04, covering environment preparation, JDK installation, hostname and hosts configuration, time synchronization, system tuning, user creation, ES download, configuration, service setup, and cluster verification.

Environment Information

Three nodes are used: ELK01 (10.0.0.40), ELK02 (10.0.0.41), ELK03 (10.0.0.42), all running Ubuntu 22.04.

Practical Steps

Install JDK (required on all nodes)

ElasticSearch runs on Java, so JDK 11 is installed.

Installation guide: https://www.cnblogs.com/huangSir-devops/p/18919758

ElasticSearch 7.17.x is compatible with JDK 11.

wget https://mirrors.huaweicloud.com/openjdk/11.0.2/openjdk-11.0.2_linux-x64_bin.tar.gz
tar -xvf openjdk-11.0.2_linux-x64_bin.tar.gz
ln -s /root/jdk-11.0.2 /usr/local/jdk11
vim /etc/profile
export JAVA_HOME=/usr/local/jdk11
export PATH=$JAVA_HOME/bin:$PATH
source /etc/profile
java -version

Configure Hostname and /etc/hosts

# ELK01
hostnamectl set-hostname ELK01
hostname
# ELK02
hostnamectl set-hostname ELK02
hostname
# ELK03
hostnamectl set-hostname ELK03
hostname
# Add hosts on all nodes
vim /etc/hosts
10.0.0.40 ELK01
10.0.0.41 ELK02
10.0.0.42 ELK03

Configure Time Synchronization

ln -svf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
apt -y install ntpdate
ntpdate ntp.aliyun.com
echo "*/5 * * * * /usr/sbin/ntpdate ntp.aliyun.com" > /var/spool/cron/crontabs/root

System Configuration

Increase file descriptors, virtual memory, and network parameters.

vim /etc/sysctl.conf
fs.file-max = 655360
vm.max_map_count = 2147483642
vm.swappiness = 1
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_keepalive_intvl = 60
net.ipv4.tcp_keepalive_probes = 10
net.ipv4.tcp_max_syn_backlog = 4096
net.core.somaxconn = 4096
net.core.netdev_max_backlog = 16384
net.core.rmem_max = 262144
net.core.wmem_max = 262144
sysctl -p /etc/sysctl.conf
sysctl -q vm.max_map_count

Create ES Directories and User

mkdir -p /data/elasticsearch/
mkdir -p /var/log/elasticsearch/
useradd elasticsearch
chown elasticsearch:elasticsearch -R /data/elasticsearch/
chown elasticsearch:elasticsearch -R /var/log/elasticsearch/
vim /etc/security/limits.conf
elasticsearch hard nofile 655360
elasticsearch soft nofile 655360
elasticsearch hard nproc 8192
elasticsearch soft nproc 8192
elasticsearch hard memlock unlimited
elasticsearch soft memlock unlimited

Download and Configure ElasticSearch

Official download: https://www.elastic.co/downloads/past-releases#elasticsearch

wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.17.26-linux-x86_64.tar.gz
tar -xvf elasticsearch-7.17.26-linux-x86_64.tar.gz
mv elasticsearch-7.17.26 /data/
chown elasticsearch:elasticsearch -R /data/elasticsearch-7.17.26/
ln -s /data/elasticsearch-7.17.26 /usr/local/es7
vim /usr/local/es7/config/elasticsearch.yml
cluster.name: es7
path.data: /data/elasticsearch
path.logs: /var/log/elasticsearch
network.host: 0.0.0.0
http.port: 9200
discovery.seed_hosts: ["ELK01","ELK02","ELK03"]
cluster.initial_master_nodes: ["ELK01","ELK02","ELK03"]
node.name: ELK03

Create systemd Service and Start Cluster

vim /lib/systemd/system/es.service
[Unit]
Description=elasticsearch service
Documentation=https://www.cnblogs.com/huangSir-devops
After=network.target auditd.service

[Service]
LimitMEMLOCK=infinity
User=elasticsearch
ExecStart=/usr/local/es7/bin/elasticsearch
TimeoutStopSec=0
TimeoutStartSec=0

[Install]
WantedBy=multi-user.target

systemctl daemon-reload
systemctl start es
systemctl status es

Check Cluster Nodes

curl 10.0.0.40:9200/_cat/nodes
curl 10.0.0.40:9200/_cat/health?v