[ONOS-7902] Add node handler and a set of CLIs for kubernetes node

Change-Id: Iee4a88e4af437d551a38342de339455387389f61
diff --git a/apps/k8s-node/app/src/main/java/org/onosproject/k8snode/cli/K8sNodeCheckCommand.java b/apps/k8s-node/app/src/main/java/org/onosproject/k8snode/cli/K8sNodeCheckCommand.java
new file mode 100644
index 0000000..9879415
--- /dev/null
+++ b/apps/k8s-node/app/src/main/java/org/onosproject/k8snode/cli/K8sNodeCheckCommand.java
@@ -0,0 +1,103 @@
+/*
+ * Copyright 2019-present Open Networking Foundation
+ *
+ * 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.onosproject.k8snode.cli;
+
+import org.apache.karaf.shell.api.action.Argument;
+import org.apache.karaf.shell.api.action.Command;
+import org.apache.karaf.shell.api.action.Completion;
+import org.apache.karaf.shell.api.action.lifecycle.Service;
+import org.onosproject.cli.AbstractShellCommand;
+import org.onosproject.k8snode.api.K8sNode;
+import org.onosproject.k8snode.api.K8sNodeService;
+import org.onosproject.net.Device;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.Port;
+import org.onosproject.net.device.DeviceService;
+
+import static org.onosproject.k8snode.api.Constants.GENEVE_TUNNEL;
+import static org.onosproject.k8snode.api.Constants.GRE_TUNNEL;
+import static org.onosproject.k8snode.api.Constants.INTEGRATION_BRIDGE;
+import static org.onosproject.k8snode.api.Constants.VXLAN_TUNNEL;
+import static org.onosproject.net.AnnotationKeys.PORT_NAME;
+
+/**
+ * Checks detailed node init state.
+ */
+@Service
+@Command(scope = "onos", name = "k8s-node-check",
+        description = "Shows detailed kubernetes node init state")
+public class K8sNodeCheckCommand extends AbstractShellCommand {
+
+    @Argument(index = 0, name = "hostname", description = "Hostname",
+            required = true, multiValued = false)
+    @Completion(K8sHostnameCompleter.class)
+    private String hostname = null;
+
+    private static final String MSG_OK = "OK";
+    private static final String MSG_ERROR = "ERROR";
+
+    @Override
+    protected void doExecute() {
+        K8sNodeService nodeService = get(K8sNodeService.class);
+        DeviceService deviceService = get(DeviceService.class);
+
+        K8sNode node = nodeService.node(hostname);
+        if (node == null) {
+            print("Cannot find %s from registered nodes", hostname);
+            return;
+        }
+
+        print("[Integration Bridge Status]");
+        Device device = deviceService.getDevice(node.intgBridge());
+        if (device != null) {
+            print("%s %s=%s available=%s %s",
+                    deviceService.isAvailable(device.id()) ? MSG_OK : MSG_ERROR,
+                    INTEGRATION_BRIDGE,
+                    device.id(),
+                    deviceService.isAvailable(device.id()),
+                    device.annotations());
+            if (node.dataIp() != null) {
+                printPortState(deviceService, node.intgBridge(), VXLAN_TUNNEL);
+                printPortState(deviceService, node.intgBridge(), GRE_TUNNEL);
+                printPortState(deviceService, node.intgBridge(), GENEVE_TUNNEL);
+            }
+        } else {
+            print("%s %s=%s is not available",
+                    MSG_ERROR,
+                    INTEGRATION_BRIDGE,
+                    node.intgBridge());
+        }
+    }
+
+    private void printPortState(DeviceService deviceService,
+                                DeviceId deviceId, String portName) {
+        Port port = deviceService.getPorts(deviceId).stream()
+                .filter(p -> p.annotations().value(PORT_NAME).equals(portName) &&
+                        p.isEnabled())
+                .findAny().orElse(null);
+
+        if (port != null) {
+            print("%s %s portNum=%s enabled=%s %s",
+                    port.isEnabled() ? MSG_OK : MSG_ERROR,
+                    portName,
+                    port.number(),
+                    port.isEnabled() ? Boolean.TRUE : Boolean.FALSE,
+                    port.annotations());
+        } else {
+            print("%s %s does not exist", MSG_ERROR, portName);
+        }
+    }
+}