Setup ElasticSearch Ubuntu / Mac

ElasticSearch on ubuntu

For installation run these commands

sudo apt-get install elasticsearch
sudo systemctl daemon-reload

To automatically start elasticsearch when system reboots

sudo systemctl enable elasticsearch.service 

Navigate to file /etc/elasticsearch/elasticsearch.yml
Edit the file and uncomment following lines

# network.host: localhost
# http.port: 9200

Change to the following (make sure not leave any space)

network.host: localhost
http.port: 9200

Add new line

discovery.type: single-node

Navigate to file /etc/elasticsearch/jvm.options
Add the following lines

-Xms2g
-Xmx4g

You can change the above two lines according to your system's memory, here 2g represents 2GB. -Xms2g is a minimum of 2GB assigned to ES and -Xsmx4g is a maximum of 4GB assigned.

If you want to assign memory in MBs you can use
-Xms512m will give a minimum of 512MB memory to ES.

NOTE: While removing comments from the files mentioned above. be careful not to leave any spaces from the line start this would not allow ElasticSearch to start

Run the following command to start

sudo systemctl start elasticsearch
curl http://localhost:9200/

Run this command to see the health of your ES cluster

curl -XGET 'localhost:9200/_cluster/health?pretty=true'

Plugin install in case of error:400

sudo /usr/share/elasticsearch/bin/elasticsearch-plugin install analysis-icu

For uninstallation run these commands

sudo apt-get remove --purge elasticsearch
sudo rm -rf /etc/elasticsearch
sudo rm -rf /var/lib/elasticsearch

ElasticSearch on MacBook / HomeBrew

Elastic publishes Homebrew formulae so you can install Elasticsearch with the Homebrew package manager.

To install with Homebrew, you first need to tap the Elastic Homebrew repository:

brew tap elastic/tap

Once you’ve tapped the Elastic Homebrew repo, you can use brew install to install the latest version of Elasticsearch:

brew install elastic/tap/elasticsearch-full

To install the Elasticsearch plugin on Mac use the following command

/usr/local/var/homebrew/linked/elasticsearch-full/bin/elasticsearch-plugin install <plugin_name>

Note that the path to bin may vary according to your system
/usr/local/var/homebrew/linked/elasticsearch-full/bin