control: Implement service command 'stop,restart,status'. (#2883)

- stop - stops all the servers.
- restart - restart all the servers.
- status - prints status of storage info about the cluster.

cmd/controller-router_test.go

@@ -0,0 +1,91 @@
+/*
+ * Minio Cloud Storage, (C) 2016 Minio, Inc.
+ *
+ * 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 cmd
+
+import "testing"
+
+// Tests initialization of remote controller clients.
+func TestInitRemoteControllerClients(t *testing.T) {
+	rootPath, err := newTestConfig("us-east-1")
+	if err != nil {
+		t.Fatal("Unable to initialize config", err)
+	}
+	defer removeAll(rootPath)
+
+	testCases := []struct {
+		srvCmdConfig serverCmdConfig
+		totalClients int
+	}{
+		// Test - 1 no allocation if server config is not distributed XL.
+		{
+			srvCmdConfig: serverCmdConfig{
+				isDistXL: false,
+			},
+			totalClients: 0,
+		},
+		// Test - 2 two clients allocated with 4 disks with 2 disks on same node each.
+		{
+			srvCmdConfig: serverCmdConfig{
+				isDistXL: true,
+				disks: []string{
+					"10.1.10.1:/mnt/disk1",
+					"10.1.10.1:/mnt/disk2",
+					"10.1.10.2:/mnt/disk3",
+					"10.1.10.2:/mnt/disk4",
+				},
+			},
+			totalClients: 2,
+		},
+		// Test - 3 4 clients allocated with 4 disks with 1 disk on each node.
+		{
+			srvCmdConfig: serverCmdConfig{
+				isDistXL: true,
+				disks: []string{
+					"10.1.10.1:/mnt/disk1",
+					"10.1.10.2:/mnt/disk2",
+					"10.1.10.3:/mnt/disk3",
+					"10.1.10.4:/mnt/disk4",
+				},
+			},
+			totalClients: 4,
+		},
+		// Test - 4 2 clients allocated with 4 disks with 1 disk ignored.
+		{
+			srvCmdConfig: serverCmdConfig{
+				isDistXL: true,
+				disks: []string{
+					"10.1.10.1:/mnt/disk1",
+					"10.1.10.2:/mnt/disk2",
+					"10.1.10.3:/mnt/disk3",
+					"10.1.10.4:/mnt/disk4",
+				},
+				ignoredDisks: []string{
+					"10.1.10.1:/mnt/disk1",
+				},
+			},
+			totalClients: 3,
+		},
+	}
+
+	// Evaluate and validate all test cases.
+	for i, testCase := range testCases {
+		rclients := initRemoteControllerClients(testCase.srvCmdConfig)
+		if len(rclients) != testCase.totalClients {
+			t.Errorf("Test %d, Expected %d, got %d RPC clients.", i+1, testCase.totalClients, len(rclients))
+		}
+	}
+}