Skip to main content
Version: 1.3.2

OpenLooKeng Engine

This article mainly introduces the installation, usage and configuration of the openLooKeng engine plugin in Linkis `.

1. Environmental Requirements​

1.1 Environment Installation​

If you wish to deploy the openLooKeng engine, you need to prepare a working openLooKeng environment.

1.2 Service Authentication​

# Prepare hetu-cli
wget https://download.openlookeng.io/1.5.0/hetu-cli-1.5.0-executable.jar
mv hetu-cli-1.5.0-executable.jar hetu-cli
chmod +x hetu-cli

# link service
./hetu-cli --server 127.0.0.1:9090 --catalog tpcds --schema default

# Execute query statement
lk:default> select d_date_sk, d_date_id, d_date, d_month_seq from tpcds.sf1.date_dim order by d_date limit 5;

# Get the following output to represent the service is available
 d_date_sk |    d_date_id     |   d_date   | d_month_seq
-------------+--------+------------+------ -------
   2415022 | AAAAAAAAOKJNECAA | 1900-01-02 | 0
   2415023 | AAAAAAAAPKJNECAA | 1900-01-03 | 0
   2415024 | AAAAAAAAALJNECAA | 1900-01-04 | 0
   2415025 | AAAAAAAABLJNECAA | 1900-01-05 | 0
   2415026 | AAAAAAAACLJNECAA | 1900-01-06 | 0
(5 rows)

Query 20221110_043803_00011_m9gmv, FINISHED, 1 node
Splits: 33 total, 33 done (100.00%)
0:00 [73K rows, 0B] [86.8K rows/s, 0B/s]

2. Engine plugin installation​

2.1 Engine plugin preparation (choose one) non-default engine​

Method 1: Download the engine plug-in package directly

Linkis Engine Plugin Download

Method 2: Compile the engine plug-in separately (requires a maven environment)

# compile
${linkis_code_dir}/linkis-enginepconn-pugins/engineconn-plugins/openlookeng/
mvn clean install
# The compiled engine plug-in package is located in the following directory
${linkis_code_dir}/linkis-engineconn-plugins/openlookeng/target/out/

EngineConnPlugin Engine Plugin Installation

2.2 Upload and load engine plugins​

Upload the engine plug-in package in 2.1 to the engine directory of the server

${LINKIS_HOME}/lib/linkis-engineplugins

The directory structure after uploading is as follows

linkis-engineconn-plugins/
├── openlookeng
│   ├── dist
│ │ └── 1.5.0
│   │       ├── conf
│ │ └── lib
│   └── plugin
│ └── 1.5.0

2.3 Engine refresh​

2.3.1 Restart and refresh​

Refresh the engine by restarting the linkis-cg-linkismanager service

cd ${LINKIS_HOME}/sbin
sh linkis-daemon.sh restart cg-linkismanager

2.3.2 Check whether the engine is refreshed successfully​

You can check whether the last_update_time of the linkis_engine_conn_plugin_bml_resources table in the database is the time to trigger the refresh.

#Login to the `linkis` database
select * from linkis_cg_engine_conn_plugin_bml_resources;

3. The use of the engine​

3.1 Submitting tasks via Linkis-cli​

sh ./bin/linkis-cli -engineType openlookeng-1.5.0 \
-codeType sql -code 'select * from tpcds.sf1.date_dim;' \
-submitUser hadoop -proxyUser hadoop \
-runtimeMap linkis.openlookeng.url=http://127.0.0.1:8080

More Linkis-Cli command parameter reference: Linkis-Cli usage

3.2 Submitting tasks through Linkis SDK​

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

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

4. Engine configuration instructions​

4.1 Default Configuration Description​

ConfigurationDefaultRequiredDescription
linkis.openlookeng.urlhttp://127.0.0.1:8080yeslink address
linkis.openlookeng.catalogsystemyescatalog
linkis.openlookeng.sourceglobalnosource

4.2 Configuration modification​

If the default parameters are not satisfied, there are the following ways to configure some basic parameters

4.2.1 Management console configuration​

Note: After modifying the configuration under the IDE label, you need to specify -creator IDE to take effect (other labels are similar), such as:

sh ./bin/linkis-cli -creator IDE \
-engineType openlookeng-1.5.0 -codeType sql \
-code 'select * from tpcds.sf1.date_dim;' \
-submitUser hadoop -proxyUser hadoop

4.2.2 Task interface configuration​

Submit the task interface, configure it through the parameter params.configuration.runtime

Example of http request parameters
{
    "executionContent": {"code": "select * from tpcds.sf1.date_dim;", "runType":  "sql"},
    "params": {
                    "variable": {},
                    "configuration": {
                            "runtime": {
                                "linkis.openlookeng.url":"http://127.0.0.1:9090"
                                }
                            }
                    },
    "labels": {
        "engineType": "openlookeng-1.5.0",
        "userCreator": "hadoop-IDE"
    }
}

Linkis is managed through the engine tag, and the data table information involved is shown below.

linkis_ps_configuration_config_key: key and default values ​​of configuration parameters inserted into the engine
linkis_cg_manager_label: insert engine label such as: openlookeng-1.5.0
linkis_ps_configuration_category: Insert the directory association of the engine
linkis_ps_configuration_config_value: Insert the configuration that the engine needs to display
linkis_ps_configuration_key_engine_relation: The relationship between the configuration item and the engine

The initial data related to the engine in the table is as follows

-- set variable
SET @OPENLOOKENG_LABEL="openlookeng-1.5.0";
SET @OPENLOOKENG_ALL=CONCAT('*-*,',@OPENLOOKENG_LABEL);
SET @OPENLOOKENG_IDE=CONCAT('*-IDE,',@OPENLOOKENG_LABEL);

-- engine label
insert into `linkis_cg_manager_label` (`label_key`, `label_value`, `label_feature`, `label_value_size`, `update_time`, `create_time`) VALUES ('combined_userCreator_engineType', @OPENLOOKENG_ALL, 'OPTIONAL', 2, now(), now());
insert into `linkis_cg_manager_label` (`label_key`, `label_value`, `label_feature`, `label_value_size`, `update_time`, `create_time`) VALUES ('combined_userCreator_engineType', @OPENLOOKENG_IDE, 'OPTIONAL', 2, now(), now());

select @label_id := id from linkis_cg_manager_label where `label_value` = @OPENLOOKENG_IDE;
insert into linkis_ps_configuration_category (`label_id`, `level`) VALUES (@label_id, 2);

-- configuration key
INSERT INTO `linkis_ps_configuration_config_key` (`key`, `description`, `name`, `default_value`, `validate_type`, `validate_range`, `engine_conn_type`, `is_hidden`, `is_advanced`, `level`, `treeName`) VALUES ('linkis.openlookeng.url', 'eg: http://127.0.0.1:8080', 'connection address', 'http://127.0.0.1:8080', 'Regex', '^\\s *http://([^:]+)(:\\d+)(/[^\\?]+)?(\\?\\S*)?$', 'openlookeng', 0, 0, 1, 'data source conf');
INSERT INTO `linkis_ps_configuration_config_key` (`key`, `description`, `name`, `default_value`, `validate_type`, `validate_range`, `engine_conn_type`, `is_hidden`, `is_advanced`, `level`, `treeName`) VALUES ('linkis.openlookeng.catalog', 'catalog', 'catalog', 'system', 'None', '', 'openlookeng', 0, 0, 1, 'data source conf');
INSERT INTO `linkis_ps_configuration_config_key` (`key`, `description`, `name`, `default_value`, `validate_type`, `validate_range`, `engine_conn_type`, `is_hidden`, `is_advanced`, `level`, `treeName`) VALUES ('linkis.openlookeng.source', 'source', 'source', 'global', 'None', '', 'openlookeng', 0, 0, 1, 'data source conf');

-- key engine relation
insert into `linkis_ps_configuration_key_engine_relation` (`config_key_id`, `engine_type_label_id`)
(select config.id as `config_key_id`, label.id AS `engine_type_label_id` FROM linkis_ps_configuration_config_key config
INNER JOIN linkis_cg_manager_label label ON config.engine_conn_type = 'openlookeng' and label_value = @OPENLOOKENG_ALL);

-- openlookeng default configuration
insert into `linkis_ps_configuration_config_value` (`config_key_id`, `config_value`, `config_label_id`)
(select `relation`.`config_key_id` AS `config_key_id`, '' AS `config_value`, `relation`.`engine_type_label_id` AS `config_label_id` FROM linkis_ps_configuration_key_engine_relation relation
INNER JOIN linkis_cg_manager_label label ON relation.engine_type_label_id = label.id AND label.label_value = @OPENLOOKENG_ALL);