es-commands

Once you have your cluster up and running, use the following commands for exploring the cluster

Health Commands

http://localhost:9200/_cat/health?v -> The overall health of the cluster. Status Options

• GREEN - Cluster is fully functional
• YELLOW - All data is available but some replicas are not yet allocated
• RED - Part of your data is not available (probably nodes for a given shard are down)

List of Nodes in our cluster

http://localhost:9200/_cat/nodes?v

List all Indeces in our cluster

http://localhost:9200/_cat/indices?v

An index is like a ‘database’ in a relational database. It has a mapping which defines multiple types. An index is a logical namespace which maps to one or more primary shards and can have zero or more replica shards. MySQL => Databases => Tables => Columns/Rows Elasticsearch => Indices => Types => Documents with Properties An Elasticsearch cluster can contain multiple Indices (databases), which in turn contain multiple Types (tables). These types hold multiple Documents (rows), and each document has Properties(columns).

Create an Index

curl -XPUT http://localhost:9200/customer?pretty - for pretty printing

Put document under Index

curl -XPUT 'localhost:9200/customer/external/1?pretty' -d ' { "name": "John Doe" }' The above command creates a type(aka table) with the name external and assigns the id to value 1.

Retrieve the Document

curl -XGET 'localhost:9200/customer/external/1?pretty'

Delete the Index

curl -XDELETE 'localhost:9200/customer?pretty'

Generic Pattern to access data in ES

curl -X :///