Deploying Elasticsearch

Cluster Planning

Deployment Process

1. Create an elastic user.
   

   The root user has no permissions to run Elastic.

   1	useradd elastic

2. Download the Elasticsearch installation package.

   1	wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.7.0.tar.gz

3. Decompress the package.

   1	tar -zxf elasticsearch-6.7.0.tar.gz -C ./

4. Change the owner of the directory where the decompressed package resides to the elastic user:

   1	chown -R elastic:elastic elasticsearch-6.7.0

5. Modify parameter settings.
   1. Open the configuration file.

      1	vi elasticsearch-6.7.0/config/elasticsearch.yml

   2. Press i to enter the insert mode and modify the file based on your requirements.

      #Cluster name
      cluster.name: my-estest
      #Node name
      node.name: ${HOSTNAME}
      #Configure the IP address of each node.
      network.host: IPaddress3
      #Enter the IP addresses of all nodes in the cluster.
      discovery.zen.ping.unicast.hosts: ["IPaddress1","IPaddress2","IPaddress3"]
      #Add the following content (to solve the error "X-Pack is not supported and Machine Learning is not available for [linux-aarch64"):
      xpack.ml.enabled: false

   3. Press Esc, type :wq!, and press Enter to save the file and exit.
6. Run the startup command.

   1	su elastic -c "./elasticsearch-6.7.0/bin/elasticsearch -d"

7. View the run logs.

   1	tail -500 elasticsearch-6.7.0/logs/my-estest.log

8. Visit the following website.
   

   For Windows, set the host to 90.90.43.202 hadoop102.

   hadoop102:9200

   

Testing the Deployment

Check the cluster health status using the following address:

http://hadoop103:9200/_cat/health?v

If the following information is displayed, the deployment is successful: