HDDS-6814. ozone s3 getsecret default --om-service-id

hadoop-ozone/dist/src/main/smoketest/s3/s3_serviceId.robot

@@ -0,0 +1,36 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+
+*** Settings ***
+Documentation       S3 gateway test with aws cli
+Library             OperatingSystem
+Library             String
+Resource            ../commonlib.robot
+Resource            commonawslib.robot
+Test Timeout        5 minutes
+Suite Setup         Setup s3 tests
+
+*** Test Cases ***
+Get-secret without om-service-id
+    Run Keyword   Kinit test user     testuser     testuser.keytab
+    ${output}=             Execute             ozone s3 getsecret -u testuser
+    Should contain         ${output}           awsAccessKey
+    Should contain         ${output}           awsSecret
+
+Get-secret with om-service-id
+    Run Keyword   Kinit test user     testuser     testuser.keytab
+    ${output}=             Execute             ozone s3 getsecret -u testuser ${OM_HA_PARAM}
+    Should contain         ${output}           awsAccessKey
+    Should contain         ${output}           awsSecret

hadoop-ozone/tools/src/main/java/org/apache/hadoop/ozone/shell/OzoneAddress.java

@@ -187,6 +187,8 @@ public OzoneClient createClientForS3Commands(
       String omServiceID
   )
       throws IOException, OzoneClientException {
+    Collection<String> serviceIds = conf.
+        getTrimmedStringCollection(OZONE_OM_SERVICE_IDS_KEY);
     if (omServiceID != null) {
       // OM HA cluster
       if (OmUtils.isOmHAServiceId(conf, omServiceID)) {
@@ -195,17 +197,23 @@ public OzoneClient createClientForS3Commands(
         throw new OzoneClientException("Service ID specified does not match" +
             " with " + OZONE_OM_SERVICE_IDS_KEY + " defined in the " +
             "configuration. Configured " + OZONE_OM_SERVICE_IDS_KEY + " are" +
-            conf.getTrimmedStringCollection(OZONE_OM_SERVICE_IDS_KEY));
+            serviceIds);
       }
     } else {
       // If om service id is not specified, consider it as a non-HA cluster.
       // But before that check if serviceId is defined. If it is defined
-      // throw an error om service ID needs to be specified.
+      // and has length = 1, then take that ID as default.
+      // otherwise throw an error "om service ID needs to be specified."
       if (OmUtils.isServiceIdsDefined(conf)) {
-        throw new OzoneClientException("Service ID must not"
-            + " be omitted when " + OZONE_OM_SERVICE_IDS_KEY + " is defined. " +
-            "Configured " + OZONE_OM_SERVICE_IDS_KEY + " are " +
-            conf.getTrimmedStringCollection(OZONE_OM_SERVICE_IDS_KEY));
+        if (serviceIds.size() == 1) {
+          return OzoneClientFactory.getRpcClient(serviceIds.iterator().next(),
+              conf);
+        } else {
+          throw new OzoneClientException("Service ID must not"
+              + " be omitted when cluster has multiple OM Services." +
+              "  Configured " + OZONE_OM_SERVICE_IDS_KEY + " are "
+              + serviceIds);
+        }
       }
       return OzoneClientFactory.getRpcClient(conf);
     }

hadoop-ozone/tools/src/main/java/org/apache/hadoop/ozone/shell/s3/S3Handler.java

@@ -34,8 +34,8 @@ public abstract class S3Handler extends Handler {
 
   @CommandLine.Option(names = {"--om-service-id"},
       required = false,
-      description = "OM Service ID is required to be specified for OM HA" +
-          " cluster")
+      description = "OM Service ID for OM HA, " +
+          "required when cluster has multiple OM services")
   private String omServiceID;
 
   public String getOmServiceID() {