Elasticsearch

Description

Output data to Elasticsearch.

Key features

• exactly-once
• cdc

tip

Engine Supported

• supported ElasticSearch version is >= 2.x and <= 8.x

Options

name	type	required	default value
hosts	array	yes	-
index	string	yes	-
schema_save_mode	string	yes	CREATE_SCHEMA_WHEN_NOT_EXIST
data_save_mode	string	yes	APPEND_DATA
index_type	string	no
primary_keys	list	no
key_delimiter	string	no	_
username	string	no
password	string	no
max_retry_count	int	no	3
max_batch_size	int	no	10
tls_verify_certificate	boolean	no	true
tls_verify_hostnames	boolean	no	true
tls_keystore_path	string	no	-
tls_keystore_password	string	no	-
tls_truststore_path	string	no	-
tls_truststore_password	string	no	-
common-options		no	-

hosts [array]

Elasticsearch cluster http address, the format is host:port , allowing multiple hosts to be specified. Such as ["host1:9200", "host2:9200"].

index [string]

Elasticsearch index name.Index support contains variables of field name,such as seatunnel_${age}(Need to configure schema_save_mode="IGNORE"),and the field must appear at seatunnel row. If not, we will treat it as a normal index.

index_type [string]

Elasticsearch index type, it is recommended not to specify in elasticsearch 6 and above

primary_keys [list]

Primary key fields used to generate the document _id, this is cdc required options.

key_delimiter [string]

Delimiter for composite keys ("_" by default), e.g., "$" would result in document _id "KEY1$KEY2$KEY3".

username [string]

x-pack username

password [string]

x-pack password

max_retry_count [int]

one bulk request max try size

max_batch_size [int]

batch bulk doc max size

tls_verify_certificate [boolean]

Enable certificates validation for HTTPS endpoints

tls_verify_hostname [boolean]

Enable hostname validation for HTTPS endpoints

tls_keystore_path [string]

The path to the PEM or JKS key store. This file must be readable by the operating system user running SeaTunnel.

tls_keystore_password [string]

The key password for the key store specified

tls_truststore_path [string]

The path to PEM or JKS trust store. This file must be readable by the operating system user running SeaTunnel.

tls_truststore_password [string]

The key password for the trust store specified

common options

Sink plugin common parameters, please refer to Sink Common Options for details

schema_save_mode

Before the synchronous task is turned on, different treatment schemes are selected for the existing surface structure of the target side. Option introduction：
RECREATE_SCHEMA ：Will create when the table does not exist, delete and rebuild when the table is saved
CREATE_SCHEMA_WHEN_NOT_EXIST ：Will Created when the table does not exist, skipped when the table is saved
ERROR_WHEN_SCHEMA_NOT_EXIST ：Error will be reported when the table does not exist
IGNORE ：Ignore the treatment of the table

data_save_mode

Before the synchronous task is turned on, different processing schemes are selected for data existing data on the target side. Option introduction：
DROP_DATA： Preserve database structure and delete data
APPEND_DATA：Preserve database structure, preserve data
ERROR_WHEN_DATA_EXISTS：When there is data, an error is reported

Examples

Simple

sink {
    Elasticsearch {
        hosts = ["localhost:9200"]
        index = "seatunnel-${age}"
        schema_save_mode="IGNORE"
    }
}

Multi-table writing

sink {
    Elasticsearch {
        hosts = ["localhost:9200"]
        index = "${table_name}"
        schema_save_mode="IGNORE"
    }
}

CDC(Change data capture) event

sink {
    Elasticsearch {
        hosts = ["localhost:9200"]
        index = "seatunnel-${age}"
        schema_save_mode="IGNORE"
        # cdc required options
        primary_keys = ["key1", "key2", ...]
    }
}

CDC(Change data capture) event Multi-table writing

sink {
    Elasticsearch {
        hosts = ["localhost:9200"]
        index = "${table_name}"
        schema_save_mode="IGNORE"
        primary_keys = ["${primary_key}"]
    }
}

SSL (Disable certificates validation)

sink {
    Elasticsearch {
        hosts = ["https://localhost:9200"]
        username = "elastic"
        password = "elasticsearch"
        
        tls_verify_certificate = false
    }
}

SSL (Disable hostname validation)

sink {
    Elasticsearch {
        hosts = ["https://localhost:9200"]
        username = "elastic"
        password = "elasticsearch"
        
        tls_verify_hostname = false
    }
}

SSL (Enable certificates validation)

sink {
    Elasticsearch {
        hosts = ["https://localhost:9200"]
        username = "elastic"
        password = "elasticsearch"
        
        tls_keystore_path = "${your elasticsearch home}/config/certs/http.p12"
        tls_keystore_password = "${your password}"
    }
}

SAVE_MODE (Add saveMode function)

sink {
    Elasticsearch {
        hosts = ["https://localhost:9200"]
        username = "elastic"
        password = "elasticsearch"
        
        schema_save_mode = "CREATE_SCHEMA_WHEN_NOT_EXIST"
        data_save_mode = "APPEND_DATA"
    }
}

Schema Evolution

CDC collection supports a limited number of schema changes. The currently supported schema changes include:

• Adding columns.

Schema Evolution

env {
  # You can set engine configuration here
  parallelism = 5
  job.mode = "STREAMING"
  checkpoint.interval = 5000
  read_limit.bytes_per_second = 7000000
  read_limit.rows_per_second = 400
}

source {
  MySQL-CDC {
    server-id = 5652-5657
    username = "st_user_source"
    password = "mysqlpw"
    table-names = ["shop.products"]
    base-url = "jdbc:mysql://mysql_cdc_e2e:3306/shop"
    schema-changes.enabled = true
  }
}

sink {
  Elasticsearch {
    hosts = ["https://elasticsearch:9200"]
    username = "elastic"
    password = "elasticsearch"
    tls_verify_certificate = false
    tls_verify_hostname = false
    index = "schema_change_index"
    index_type = "_doc"
    "schema_save_mode" = "CREATE_SCHEMA_WHEN_NOT_EXIST"
    "data_save_mode" = "APPEND_DATA"
  }
}