felixcheung commented on a change in pull request #3331: [Zeppelin-4049] Hadoop 
Submarine (Machine Learning) interpreter
URL: https://github.com/apache/zeppelin/pull/3331#discussion_r265334757
 
 

 ##########
 File path: 
submarine/src/main/java/org/apache/zeppelin/submarine/commons/SubmarineConstants.java
 ##########
 @@ -0,0 +1,119 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.zeppelin.submarine.commons;
+
+/*
+ * NOTE: use lowercase + "_" for the option name
+ */
+public class SubmarineConstants {
+  // Docker container Environmental variable at `submarine-job-run-tf.jinja`
+  // and `/bin/interpreter.sh`
+  public static final String DOCKER_HADOOP_HDFS_HOME = 
"DOCKER_HADOOP_HDFS_HOME";
+  public static final String DOCKER_JAVA_HOME        = "DOCKER_JAVA_HOME";
+  public static final String DOCKER_CONTAINER_TIME_ZONE = 
"DOCKER_CONTAINER_TIME_ZONE";
+  public static final String INTERPRETER_LAUNCH_MODE = 
"INTERPRETER_LAUNCH_MODE";
+
+  // interpreter.sh Environmental variable
+  public static final String SUBMARINE_HADOOP_HOME  = "SUBMARINE_HADOOP_HOME";
+  public static final String HADOOP_YARN_SUBMARINE_JAR  = 
"HADOOP_YARN_SUBMARINE_JAR";
+  public static final String SUBMARINE_INTERPRETER_DOCKER_IMAGE
+      = "SUBMARINE_INTERPRETER_DOCKER_IMAGE";
+
+  public static final String ZEPPELIN_SUBMARINE_AUTH_TYPE = 
"zeppelin.submarine.auth.type";
+  public static final String SUBMARINE_HADOOP_CONF_DIR  = 
"SUBMARINE_HADOOP_CONF_DIR";
+  public static final String SUBMARINE_HADOOP_KEYTAB    = 
"SUBMARINE_HADOOP_KEYTAB";
+  public static final String SUBMARINE_HADOOP_PRINCIPAL = 
"SUBMARINE_HADOOP_PRINCIPAL";
+  public static final String SUBMARINE_HADOOP_KRB5_CONF = 
"submarine.hadoop.krb5.conf";
+
+  public static final String JOB_NAME = "JOB_NAME";
+  public static final String CLEAN_CHECKPOINT = "CLEAN_CHECKPOINT";
+  public static final String INPUT_PATH = "INPUT_PATH";
+  public static final String CHECKPOINT_PATH = "CHECKPOINT_PATH";
+  public static final String PS_LAUNCH_CMD = "PS_LAUNCH_CMD";
+  public static final String WORKER_LAUNCH_CMD = "WORKER_LAUNCH_CMD";
+  public static final String MACHINELEARING_DISTRIBUTED_ENABLE
+      = "machinelearing.distributed.enable";
+
+  public static final String ZEPPELIN_INTERPRETER_RPC_PORTRANGE
+      = "zeppelin.interpreter.rpc.portRange";
 
 Review comment:
   is this defined else where?

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