OpenLookEng Engine

This article mainly introduces the configuration, deployment and use of the openlookeng (>=1.1.1 version support) engine.

If you want to deploy the openlookeng engine, you need to prepare an available openlookeng environment.

Currently the openlookeng engine, the default version used by the client is io.hetu.core:presto-client:1.5.0

This engine plug-in is not included in the released installation deployment package by default. You can follow this guide to deploy and install https://linkis.apache.org/blog/2022/04/15/how-to-download-engineconn-plugin , or follow the process below to manually compile and deploy

Compile openlookeng separately

  1. ${linkis_code_dir}linkis-engineconn-plugins/openlookeng/
  2. mvn clean install

The engine package compiled in step 2.1 is located in

  1. ${linkis_code_dir}/linkis-engineconn-pluginsopenlookeng/target/out/openlookeng

Upload to the engine directory of the server

  1. ${LINKIS_HOME}/lib/linkis-engineplugins

And restart linkis-engineplugin (or refresh through the engine interface)

  1. cd ${LINKIS_HOME}/sbin
  2. sh linkis-daemon restart cg-engineplugin

Linkis1.X is done through tags, so we need to insert data into our database, and the insertion method is as follows.

EngineConnPlugin engine plugin installation

If the default parameters are not satisfied, you can configure some basic parameters through the parameter configuration page of the management console The service connection information of openlookeng, the default address is http://127.0.0.1:8080

OpenLookEng Engine - 图1

Figure 3-1 openlookeng configuration information

You can also configure it through the parameter params.configuration.runtime in the submit task interface

  1. Example of http request parameters
  2. {
  3.     "executionContent": {"code": "show databases;", "runType": "sql"},
  4.     "params": {
  5.                     "variable": {},
  6.                     "configuration": {
  7.                             "runtime": {
  8.                                 "linkis.openlookeng.url":"http://127.0.0.1:9090"
  9.                                 }
  10.                             }
  11.                     },
  12.     "source": {"scriptPath": "file:///mnt/bdp/hadoop/1.sql"},
  13.     "labels": {
  14.         "engineType": "openlookeng-1.5.0",
  15.         "userCreator": "hadoop-IDE"
  16.     }
  17. }

Linkis provides Java and Scala SDKs to submit tasks to the Linkis server. For details, please refer to JAVA SDK Manual. For the openlookeng task, you only need to modify the EngineConnType and CodeType parameters in the Demo:

  1.         Map<String, Object> labels = new HashMap<String, Object>();
  2.         labels.put(LabelKeyConstant.ENGINE_TYPE_KEY, "openlookeng-1.5.0"); // required engineType Label
  3.         labels.put(LabelKeyConstant.USER_CREATOR_TYPE_KEY, "hadoop-IDE");// required execute user and creator
  4.         labels.put(LabelKeyConstant.CODE_TYPE_KEY, "sql"); // required codeType

After Linkis 1.0, the cli method is provided to submit tasks. We only need to specify the corresponding EngineConn and CodeType tag types. The use of openlookeng is as follows:

  1. sh ./bin/linkis-cli -engineType openlookeng-1.5.0 -codeType sql -code 'show databases;' -submitUser hadoop -proxyUser hadoop

For specific usage, please refer to: Linkis CLI Manual.