MRS OpenTSDB Sink Stream

Function

DLI exports the output data of the Flink job to OpenTSDB of MRS.

Prerequisites

OpenTSDB has been installed in the MRS cluster.
In this scenario, jobs must run on the dedicated queue of DLI. Therefore, DLI must interconnect with the enhanced datasource connection that has been connected with MRS clusters. You can also set the security group rules as required.
For details about how to create an enhanced datasource connection, see Enhanced Datasource Connections in the Data Lake Insight User Guide.

For details about how to configure security group rules, see Security Group in the Virtual Private Cloud User Guide.

Syntax

CREATE SINK STREAM stream_id (attr_name attr_type (',' attr_name attr_type)* )
  WITH (
    type = "opentsdb",
    region = "",
    tsdb_metrics = "",
    tsdb_timestamps = "",
    tsdb_values = "",
    tsdb_tags = "",
    batch_insert_data_num = ""
  )

Keyword

**Table 1** Keyword description
Parameter	Mandatory	Description
type	Yes	Sink channel type. opentsdb indicates that data is exported to OpenTSDB of MRS.
region	Yes	Region where MRS resides.
tsdb_link_address	Yes	Service address of the OpenTSDB instance in MRS. The format is http://ip:port or https://ip:port. NOTE: If tsd.https.enabled is set to true, HTTPS must be used. Note that HTTPS does not support certificate authentication.
tsdb_metrics	Yes	Metric of a data point, which can be specified through parameter configurations.
tsdb_timestamps	Yes	Timestamp of a data point. The data type can be LONG, INT, SHORT, or STRING. Only dynamic columns are supported.
tsdb_values	Yes	Value of a data point. The data type can be SHORT, INT, LONG, FLOAT, DOUBLE, or STRING. Dynamic columns or constant values are supported.
tsdb_tags	Yes	Tags of a data point. Each of tags contains at least one tag value and up to eight tag values. Tags of the data point can be specified through parameter configurations.
batch_insert_data_num	No	Number of data records to be written in batches at a time. The value must be a positive integer. The upper limit is 65536. The default value is 8.

Precautions

If a configuration item can be specified through parameter configurations, one or more columns in the record can be used as part of the configuration item. For example, if the configuration item is set to car_$ {car_brand} and the value of car_brand in a record is BMW, the value of this configuration item is car_BMW in the record.

Example

Output data of stream weather_out to OpenTSDB of MRS.

CREATE SINK STREAM weather_out (
  timestamp_value LONG, /* Time */
  temperature FLOAT, /* Temperature value */
  humidity FLOAT, /* Humidity */
  location STRING /* Location */
)
  WITH (
    type = "opentsdb",
    region = "xxx",
    tsdb_link_address = "https://x.x.x.x:4242",
    tsdb_metrics = "weather",
    tsdb_timestamps = "${timestamp_value}",
    tsdb_values = "${temperature}; ${humidity}",
    tsdb_tags = "location:${location},signify:temperature; location:${location},signify:humidity",
    batch_insert_data_num = "10"
);