+ * 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.hadoop.ozone.upgrade;
+
+import java.util.concurrent.Callable;
+
+import picocli.CommandLine.Command;
+
+/**
+ * Command to move blocks between HDFS datanodes.
+ */
+@Command(name = "balance",
+ description = "Move the HDFS blocks for a better distribution "
+ + "usage.")
+public class Balance implements Callable
+ * 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.hadoop.ozone.upgrade;
+
+import java.util.concurrent.Callable;
+
+import picocli.CommandLine.Command;
+
+/**
+ * Execute Ozone specific HDFS ballanced..
+ */
+@Command(name = "execute",
+ description = "Start/restart upgrade from HDFS to Ozone cluster.")
+public class Execute implements Callable
+ * 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.hadoop.ozone.upgrade;
+
+import org.apache.hadoop.hdds.cli.GenericCli;
+import org.apache.hadoop.hdds.cli.HddsVersionProvider;
+
+import picocli.CommandLine.Command;
+
+/**
+ * Command line interface for the In-Place upgrade utility.
+ *
+ * In-Place upgrade can convert HDFS cluster data to Ozone data without
+ * (or minimal) data moving.
+ */
+@Command(name = "ozone upgrade",
+ description = "Convert raw HDFS data to Ozone data without data movement.",
+ subcommands = {
+ Plan.class,
+ Balance.class,
+ Execute.class,
+ },
+ versionProvider = HddsVersionProvider.class,
+ mixinStandardHelpOptions = true)
+public class InPlaceUpgrade extends GenericCli {
+
+ public static void main(String[] args) {
+ new InPlaceUpgrade().run(args);
+ }
+}
diff --git a/hadoop-ozone/upgrade/src/main/java/org/apache/hadoop/ozone/upgrade/Plan.java b/hadoop-ozone/upgrade/src/main/java/org/apache/hadoop/ozone/upgrade/Plan.java
new file mode 100644
index 0000000000..efd6092a0b
--- /dev/null
+++ b/hadoop-ozone/upgrade/src/main/java/org/apache/hadoop/ozone/upgrade/Plan.java
@@ -0,0 +1,38 @@
+/**
+ * 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.
+ */
+package org.apache.hadoop.ozone.upgrade;
+
+import java.util.concurrent.Callable;
+
+import picocli.CommandLine.Command;
+
+/**
+ * Command to calculate statistics and estimate the upgrade.
+ */
+@Command(name = "plan",
+ description = "Plan existing HDFS block distribution and give."
+ + "estimation.")
+public class Plan implements Callable
+ * 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.hadoop.ozone.upgrade;
+
+/**
+ * In-Place upgrade utility to upgrade HDDS to Ozone cluster..
+ */
\ No newline at end of file