Commissioning Applications on Linux

Updated on 2022-11-18 GMT+08:00

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Scenario

After the code is developed, you can compile the code into a JAR file and upload it to a Linux environment for application function commissioning.

NOTE:

Before commissioning applications on Linux, you need to pre-install a client on the Linux node.

Procedure

Change the path for storing the KeyTab file in the jaas-zk.conf file in the Linux environment as required. for example, /opt/client/conf/user.keytab.
Modify the configuration file path of the sample code, as shown in the following example:
```
private final static String PATH_TO_KRB5_CONF = "/opt/client/krb5.conf"
```
In the Windows development environment IntelliJ IDEA, choose Maven Projects > Example project name > Lifecycle and perform the clean and package operations. After the compilation is complete, the hetu-examples-XXX.jar file is generated in the target directory.
Upload the hetu-examples-XXX.jar file to the /opt/client directory in the Linux environment.
Download and decompress the client file FusionInsight_Cluster_Cluster ID_HetuEngine_Client.tar by referring to Preparing Development Environment, obtain the JDBC drive package, and upload it to the /opt//client directory in the Linux environment.

NOTE:

The JDBC driver package hetu-jdbc-*.jar can be obtained from the FusionInsight_Cluster_1_Services_ClientConfig\HetuEngine\XXX\ directory where the cluster client software package is decompressed. In the directory, XXX indicates ARM or x86.
Upload the jaas-zk.conf, user.keytab, and krb5.conf files obtained in Preparing for Security Authentication to the /opt/client directory in the Linux environment.
Run the following command to go to the client installation directory:

cd /opt/client
Run the following command to configure environment variables:

source bigdata_env
Run the following command to debug the development program:

java -classpath hetu-examples-*.jar:hetu-jdbc-*.jar com.huawei.hetu.className
NOTE:
- Replace the JDBC driver package name and class name with the actual ones, for example, java -classpath hetu-examples-*.jar:hetu-jdbc-*.jar com.huawei.hetu.JDBCExampleBroker.
- If SSL authentication of ZooKeeper is enabled for the interconnected cluster, you need to add the following JVM configuration
  -Dzookeeper.clientCnxnSocket=org.apache.zookeeper.ClientCnxnSocketNetty -Dzookeeper.client.secure=true.
  
  Using JDBCExampleZK as an example, the corresponding debugging command is as follows: java -cp hetu-examples-*.jar:hetu-jdbc-*.jar -Dzookeeper.clientCnxnSocket=org.apache.zookeeper.ClientCnxnSocketNetty -Dzookeeper.client.secure=true com.huawei.hetu.JDBCExampleZK.

Check whether the command output is normal.

Jul 01, 2021 8:41:23 PM io.prestosql.jdbc.$internal.airlift.log.Logger info
INFO: hsbroker finalUri is https://192.168.1.150:29860
Jul 01, 2021 8:41:24 PM io.prestosql.jdbc.$internal.airlift.log.Logger info
INFO: The final connection url is: presto://192.168.1.189:29896/hive/default
Jul 01, 2021 8:41:24 PM io.prestosql.jdbc.$internal.airlift.log.Logger info
INFO: coordinator uri is presto://192.168.1.189:29896/hive/default
user_info	
user_info2

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