Setup the initial namespace of the cluster without startup the Pulsar…

… broker. (apache#7434)

bin/pulsar

@@ -144,6 +144,7 @@ where command is one of:
 
     initialize-cluster-metadata     One-time metadata initialization
     initialize-transaction-coordinator-metadata     One-time transaction coordinator metadata initialization
+    initialize-namespace     namespace initialization
     compact-topic       Run compaction against a topic
     zookeeper-shell     Open a ZK shell client
     broker-tool         CLI to operate a specific broker
@@ -340,6 +341,8 @@ elif [ $COMMAND == "initialize-cluster-metadata" ]; then
     exec $JAVA $OPTS org.apache.pulsar.PulsarClusterMetadataSetup $@
 elif [ $COMMAND == "initialize-transaction-coordinator-metadata" ]; then
     exec $JAVA $OPTS org.apache.pulsar.PulsarTransactionCoordinatorMetadataSetup $@
+elif [ $COMMAND == "initialize-namespace" ]; then
+    exec $JAVA $OPTS org.apache.pulsar.PulsarInitialNamespaceSetup $@
 elif [ $COMMAND == "zookeeper-shell" ]; then
     exec $JAVA $OPTS org.apache.zookeeper.ZooKeeperMain $@
 elif [ $COMMAND == "broker-tool" ]; then

pulsar-broker/src/main/java/org/apache/pulsar/PulsarInitialNamespaceSetup.java

@@ -0,0 +1,99 @@
+/**
+ * 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.pulsar;
+
+import com.beust.jcommander.JCommander;
+import com.beust.jcommander.Parameter;
+import org.apache.pulsar.common.naming.NamespaceName;
+import org.apache.zookeeper.ZooKeeper;
+
+import java.util.List;
+
+/**
+ * Setup the initial namespace of the cluster without startup the Pulsar broker.
+ */
+public class PulsarInitialNamespaceSetup {
+
+    private static class Arguments {
+
+        @Parameter(names = { "-c", "--cluster" }, description = "Cluster name", required = true)
+        private String cluster;
+
+        @Parameter(names = { "-cs",
+                "--configuration-store" }, description = "Configuration Store connection string", required = true)
+        private String configurationStore;
+
+        @Parameter(names = {
+                "--zookeeper-session-timeout-ms"
+        }, description = "Local zookeeper session timeout ms")
+        private int zkSessionTimeoutMillis = 30000;
+
+        @Parameter(description = "tenant/namespace", required = true)
+        private List<String> namespaces;
+
+        @Parameter(names = { "-h", "--help" }, description = "Show this help message")
+        private boolean help = false;
+
+    }
+
+    public static void main(String[] args) throws Exception {
+        Arguments arguments = new Arguments();
+        JCommander jcommander = new JCommander();
+        try {
+            jcommander.addObject(arguments);
+            jcommander.parse(args);
+            if (arguments.help) {
+                jcommander.usage();
+                return;
+            }
+        } catch (Exception e) {
+            jcommander.usage();
+            throw e;
+        }
+
+        if (arguments.configurationStore == null) {
+            System.err.println("Configuration store address argument is required (--configuration-store)");
+            jcommander.usage();
+            System.exit(1);
+        }
+
+        ZooKeeper configStoreZk = PulsarClusterMetadataSetup
+                .initZk(arguments.configurationStore, arguments.zkSessionTimeoutMillis);
+
+        for (String namespace : arguments.namespaces) {
+            NamespaceName namespaceName = null;
+            try {
+                namespaceName = NamespaceName.get(namespace);
+            } catch (Exception e) {
+                System.out.println("Invalid namespace name.");
+                System.exit(1);
+            }
+
+            // Create system tenant
+            PulsarClusterMetadataSetup
+                    .createTenantIfAbsent(configStoreZk, namespaceName.getTenant(), arguments.cluster);
+
+            // Create system namespace
+            PulsarClusterMetadataSetup.createNamespaceIfAbsent(configStoreZk, namespaceName,
+                    arguments.cluster);
+        }
+
+        System.out.println("Initial namespace setup success");
+    }
+}