In this article we are going to cover How to Install Elasticsearch 8 on Ubuntu 20.04 LTS,Configure Elasticsearch on Ubuntu 20.04 LTS and Uninstall Elasticsearch from Ubuntu.
Table of Contents
Introduction
Elasticsearch provides near real-time search and analytics for all types of data. Whether you have structured or unstructured text, numerical data, or geospatial data, Elasticsearch can efficiently store and index it in a way that supports fast searches.
Prerequisites
- Ubuntu Server with 20.04/18.04/16.04 LTS
- Java 8 or higher version
- 2 CPU and 4 GB RAM
- Open Ports 9200
Update the system packages
sudo apt update
Install the apt-transport-https package to access repository over HTTPS
sudo apt install apt-transport-https
#1.Install OpenJDK on Ubuntu
Lets install OpenJDK 11 on ubuntu using below commands.
sudo apt install openjdk-11-jdk
Lets verify java version
java --version
Output:
openjdk 11.0.14.1 2022-02-08
OpenJDK Runtime Environment (build 11.0.14.1+1-Ubuntu-0ubuntu1.20.04)
OpenJDK 64-Bit Server VM (build 11.0.14.1+1-Ubuntu-0ubuntu1.20.04, mixed mode, sharing)
#2.Setting the JAVA_HOME Environment Variables
To define the environment variable open the below file:
sudo nano /etc/environment
Paste the below variable into the file:
JAVA_HOME="/usr/lib/jvm/java-11-openjdk-amd64"
Load the environment variable using below command
source /etc/environment
Lets verify JAVA_HOME variable
echo $JAVA_HOME
Output:
/usr/lib/jvm/java-11-openjdk-amd64
#3.Install ElasticSearch 8 on Ubuntu 20.04 LTS
Download and install the public signing key, If you want download latest Elasticsearch then visit Elastic Stack Official download page.
wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo gpg --dearmor -o /usr/share/keyrings/elasticsearch-keyring.gpg
Save the repository definition to /etc/apt/sources.list.d/elastic-8.x.list:
echo "deb [signed-by=/usr/share/keyrings/elasticsearch-keyring.gpg] https://artifacts.elastic.co/packages/8.x/apt stable main" | sudo tee /etc/apt/sources.list.d/elastic-8.x.list
You can install the Elasticsearch using below command:
sudo apt-get update
sudo apt-get install elasticsearch
Start elacticsearch services
sudo systemctl start elasticsearch
Enable elacticsearch at system startup
sudo systemctl enable elasticsearch
To check the status of elasticsearch
sudo systemctl status elasticsearch
Output:
● elasticsearch.service - Elasticsearch
Loaded: loaded (/lib/systemd/system/elasticsearch.service; enabled; vendor preset: enabled)
Active: active (running) since Thu 2022-04-21 06:57:31 UTC; 9s ago
Docs: https://www.elastic.co
Main PID: 17266 (java)
Tasks: 68 (limit: 4693)
Memory: 2.3G
CGroup: /system.slice/elasticsearch.service
├─17266 /usr/share/elasticsearch/jdk/bin/java -Xshare:auto -Des.networkaddress.cache.ttl=60 -Des.networkaddress.cache.neg>
└─17539 /usr/share/elasticsearch/modules/x-pack-ml/platform/linux-x86_64/bin/controller
Apr 21 06:57:12 ip-172-31-4-2 systemd[1]: Starting Elasticsearch...
Apr 21 06:57:31 ip-172-31-4-2 systemd[1]: Started Elasticsearch.
#4.Configure Elasticsearch on Ubuntu 20.04 LTS
Let’s make changes in below configuration file
sudo nano /etc/elasticsearch/elasticsearch.yml
Go to Network section and uncomment network.host and replace your system IP with
network.host: 0.0.0.0
And you need to add this line discovery.seed_hosts: [ ] in discovery section as shown in below:
Then second step is go to the BEGIN SECURITY AUTO CONFIGURATION and here you need to replace this true with false as shown in below:
Error: elasticsearch “curl: (52) Empty reply from server” on port 9200
Solution:
Open the Elasticsearch configuration file
sudo nano /etc/elasticsearch/elasticsearch.yml
Change xpack.security.enabled: tru
xpack.security.enabled: false
After changing in configuration file you need to restart so run the below command:
sudo systemctl restart elasticsearch
#5.Access ElasticSearch on Ubuntu
Lets test Elasticsearch using curl command by sending HTTP request
curl -X GET "localhost:9200"
Output:
{
"name" : "ip-172-31-4-2",
"cluster_name" : "elasticsearch",
"cluster_uuid" : "5WWxXV59TUiwsLWmb1lTDg",
"version" : {
"number" : "8.1.3",
"build_flavor" : "default",
"build_type" : "deb",
"build_hash" : "39afaa3c0fe7db4869a161985e240bd7182d7a07",
"build_date" : "2022-04-19T08:13:25.444693396Z",
"build_snapshot" : false,
"lucene_version" : "9.0.0",
"minimum_wire_compatibility_version" : "7.17.0",
"minimum_index_compatibility_version" : "7.0.0"
},
"tagline" : "You Know, for Search"
}
You can access using browser
http://systemIP:9200
In this article we have covered How to Install Elasticsearch 8 on Ubuntu 20.04 LTS.
#6.Uninstall Elasticsearch on Ubuntu
If you wants to uninstall elasticsearch then you run the below commands:
sudo apt-get --purge autoremove elasticsearch
sudo apt-get remove --purge elasticsearch
sudo rm -rf /etc/elasticsearch
Conclusion:
In this article we have covered How to Install Elasticsearch 8 on Ubuntu 20.04 LTS,Configure Elasticsearch on Ubuntu 20.04 LTS and Uninstall Elasticsearch from Ubuntu.
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