Install elastic search Cent OS 7

elastic_search.md

Install Elasticsearch in CentOS 7

1. Download and install rpm file downloaded from oracle home page

# install by command
rpm -ivh jdk-8u151-linux-x64.rpm
# Check java version
java -version

# Default installation java in /usr/java/jdk1.8.0_151/
# Setting JAVA_HOME in .bash_profile
# Append the following line in 
export JAVA_HOME=/usr/java/jdk1.8.0_151/
export PATH=$PATH:$JAVA_HOME

2. Download red hat rpm from Elasticsearch website

# install
rpm -ivh elasticsearch-6.1.1.rpm

3. Relolad and check systemd service.

systemctl daemon-reload

$ systemctl status elasticsearch
● elasticsearch.service - Elasticsearch
   Loaded: loaded (/usr/lib/systemd/system/elasticsearch.service; enabled; vendor preset: disabled)
   Active: active (running) since Sun 2017-12-24 09:48:55 EST; 4h 25min ago
     Docs: http://www.elastic.co
 Main PID: 1985 (java)
   CGroup: /system.slice/elasticsearch.service
           └─1985 /bin/java -Xms1g -Xmx1g -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingO...

Dec 24 09:48:55 trongkha.local systemd[1]: Started Elasticsearch.
Dec 24 09:48:55 trongkha.local systemd[1]: Starting Elasticsearch...

Default configurations

Default port is 9200:

Refer to this article

Elasticsearch has three configuration files:

• elasticsearch.yml for configuring Elasticsearch
• jvm.options for configuring Elasticsearch JVM settings
• log4j2.properties for configuring Elasticsearch logging