elasticsearchHow do I upgrade to the latest version of Elasticsearch?

1. To upgrade to the latest version of Elasticsearch, you must first download the appropriate version of the software from the Elasticsearch download page.

2. Once the download is complete, you can install the software either manually or using a package manager such as Homebrew.

3. To manually install, you can extract the archive and run the following command to install the software:

bin/elasticsearch-plugin install <plugin-name>

4. After installation is complete, you need to configure the Elasticsearch instance. This can be done by editing the elasticsearch.yml configuration file.

5. Once the configuration is complete, you can start the Elasticsearch instance by running the following command:

bin/elasticsearch

6. After the instance is running, you can check the version of Elasticsearch by running the following command:

curl -XGET localhost:9200

7. The output should include a version field which displays the version of Elasticsearch that is running.

{
  "name" : "elasticsearch-node",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "I1ZqD1q8RV6VX2-sjGKG8Q",
  "version" : {
    "number" : "7.8.1",
    "build_flavor" : "default",
    "build_type" : "tar",
    "build_hash" : "1a2f265",
    "build_date" : "2020-07-20T05:20:23.084789Z",
    "build_snapshot" : false,
    "lucene_version" : "8.5.1",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}

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