Installing Elasticsearch is very well documented in the elastic.co site. I installed it in a t2 micro instance for testing purpose. I used the below commands to install it in Ubuntu 20.04.
#download the latest deb file wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.9.1-amd64.deb #download the published checksum wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.9.1-amd64.deb.sha512 #check the shasum shasum -a 512 -c elasticsearch-7.9.1-amd64.deb.sha512 #install sudo dpkg -i elasticsearch-7.9.1-amd64.deb
After installing we need to start it as it does not start automatically. So to configure Elasticsearch to start automatically we have to run the following commands:
sudo /bin/systemctl daemon-reload sudo /bin/systemctl enable elasticsearch.service #start the service sudo systemctl start elasticsearch.service
To check the status of the service
sudo systemctl status elasticsearch.service
To stop the service
sudo systemctl stop elasticsearch.service
Since I was using a t2 micro which has only 1 GB RAM so the Elasticsearch could not be started. To fix it I used Swap memory. It is not available by default and also not recommended in EBS as it is slow however we can use it for testing purpose. Below are the command to create swap space:
#allocates 2GB for swap file sudo fallocate -l 2G /swapfile #permission to be only accessible to root sudo chmod 600 /swapfile #mark file as swap space sudo mkswap /swapfile #enable the swap file to be used by the system sudo swapon /swapfile #check if swap is available sudo swapon --show #make the swap file permanent by adding it to /etc/fstab /swapfile swap swap defaults 0 0
While we have installed the Elasticsearch but we need an interface to manage it and the best tool available is Kibana. Follow this article to install Kibana in AWS and access it publicly.