Use API operations to manage an Alibaba Cloud Elasticsearch cluster

Access your Elasticsearch cluster

1. Connect to the ECS instance.
   For more information, see Step 3: Connect to the ECS instance.
2. Run the following command to access your Elasticsearch cluster:
   Note If the system displays curl command not found, you must run the yum install curl command to install cURL on the ECS instance.

   curl -u <user>:<password> http://<host>:<port>

   Parameter	Description
   <user>	The username that is used to access your Elasticsearch cluster. We recommend that you use a username other than elastic. Notice If you use the elastic account to access your Elasticsearch cluster and then reset the password of the account, it may require some time for the new password to take effect. During this period, you cannot use the elastic account to access the cluster. Therefore, we recommend that you do not use the elastic account to access an Elasticsearch cluster. You can log on to the Kibana console and create a user with the required role to access the Elasticsearch cluster. For more information, see Create a role and Create a user. If the version of your Elasticsearch cluster contains with_X-Pack, you must specify both the username and password to access the Elasticsearch cluster.
   <password>	The password that is used to access your Elasticsearch cluster. The password of the elastic account is specified when you create the Elasticsearch cluster. If you forget the password, you can reset it. For more information about the procedure and precautions for resetting the password, see Reset the access password for an Elasticsearch cluster.
   <host>	The internal endpoint of your Elasticsearch cluster. You can obtain the internal endpoint from the Basic Information page of the Elasticsearch cluster.
   <port>	The port number that is used to access your Elasticsearch cluster. The default port number is 9200. You can obtain the port number from the Basic Information page of the Elasticsearch cluster.

   Example command:

   curl -u <user>:<password> http://es-cn-vxxxxx****.elasticsearch.aliyuncs.com:9200

   If the running of the command is successful, the result shown in the following figure is returned.

Query the information of the cluster

• Query the health status of the cluster

  curl -u <user>:<password> -XGET 'http://es-cn-vxxxxx****.elasticsearch.aliyuncs.com:9200/_cat/health?v'

  If the running of the command is successful, the result shown in the following figure is returned.

  
• Query indexes in the cluster

  curl -u <user>:<password> -XGET 'http://es-cn-vxxxxx****.elasticsearch.aliyuncs.com:9200/_cat/indices?v'

  If the running of the command is successful, the result shown in the following figure is returned.

  

Create indexes and documents

• Create an index

  curl -u <user>:<password> -XPUT 'http://es-cn-vxxxxx****.elasticsearch.aliyuncs.com:9200/product_info'

  In the preceding example, an index named product_info is created.

  If the running of the command is successful, the result shown in the following figure is returned.
• Configure a mapping for an index

  curl -u <user>:<password> -XPUT 'http://es-cn-vxxxxx****.elasticsearch.aliyuncs.com:9200/product_info/_doc/_mapping' -H 'Content-Type: application/json' -d '
  {
   "_doc":{
     "properties": {
          "productName": {"type": "text","analyzer": "ik_smart"},
          "annual_rate":{"type":"keyword"},
          "describe": {"type": "text","analyzer": "ik_smart"}
        }
    }
  }'

  If the running of the command is successful, the result shown in the following figure is returned.

  

  In the preceding example, the type of the product_info index is set to _doc. The index contains the productName, annual_rate, and describe fields. This example also defines tokenizers for the fields.

• Create documents and insert data
  • Create a single document

    curl -u <user>:<password> -XPOST 'http://es-cn-vxxxxx****.elasticsearch.aliyuncs.com:9200/product_info/_doc/1?pretty' -H 'Content-Type: application/json' -d '
    {
    "productName":"testpro",
    "annual_rate":"3.22%",
    "describe":"testpro"
    }'

    If the running of the command is successful, the result shown in the following figure is returned.

    In the preceding example, a document named 1 is created in the product_info index of the _doc type, and a data record is inserted into the document.

  • Create multiple documents

    curl -u <user>:<password> -XPOST http://es-cn-vxxxxx****.elasticsearch.aliyuncs.com:9200/_bulk -H 'Content-Type: application/json' -d'
    { "index" : { "_index": "product_info", "_type" : "_doc", "_id" : "1" } }
    {"productName":"testpro","annual_rate":"3.22%","describe":"testpro"}
    { "index" : { "_index": "product_info", "_type" : "_doc", "_id" : "2" } }
    {"productName":"testpro1","annual_rate":"3.26%","describe":"testpro"}'

    If the running of the command is successful, the result shown in the following figure is returned.

    In the preceding example, documents named 1 and 2 are created in the product_info index of the _doc type, and a data record is inserted into each of the documents.

Search for a document

curl -u <user>:<password> -XGET 'http://es-cn-vxxxxx****.elasticsearch.aliyuncs.com:9200/product_info/_doc/1?pretty'

If the running of the command is successful, the result shown in the following figure is returned.

In the preceding example, a document named 1 is searched for.

Delete an index

curl -u <user>:<password> -XDELETE 'http://es-cn-vxxxxx****.elasticsearch.aliyuncs.com:9200/product_info'

If the running of the command is successful, the result shown in the following figure is returned.

In the preceding example, an index named product_info is deleted.