[WIP ]VR agent

api/src/main/java/org/apache/cloudstack/agent/ApplianceAgentService.java

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+// 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.cloudstack.agent;
+
+import org.apache.cloudstack.api.command.admin.agent.LivePatchCmd;
+
+public interface ApplianceAgentService {
+    String livePatch(LivePatchCmd cmd);
+}

api/src/main/java/org/apache/cloudstack/api/command/admin/agent/LivePatchCmd.java

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+// 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.cloudstack.api.command.admin.agent;
+
+
+import javax.inject.Inject;
+
+import org.apache.cloudstack.acl.RoleType;
+import org.apache.cloudstack.agent.ApplianceAgentService;
+import org.apache.cloudstack.api.APICommand;
+import org.apache.cloudstack.api.ApiArgValidator;
+import org.apache.cloudstack.api.ApiConstants;
+import org.apache.cloudstack.api.BaseCmd;
+import org.apache.cloudstack.api.Parameter;
+import org.apache.cloudstack.api.response.SuccessResponse;
+import org.apache.cloudstack.api.response.SystemVmResponse;
+
+import com.cloud.user.Account;
+import com.google.common.base.Strings;
+
+@APICommand(name = LivePatchCmd.APINAME,
+        description = "Live Patches Appliance Agent",
+        responseObject = SuccessResponse.class,
+        requestHasSensitiveInfo = false, responseHasSensitiveInfo = false,
+        since = "4.13.0",
+        authorized = {RoleType.Admin})
+public class LivePatchCmd extends BaseCmd {
+    public static final String APINAME = "livePatch";
+
+    @Inject
+    ApplianceAgentService applianceAgentService;
+
+    /////////////////////////////////////////////////////
+    //////////////// API parameters /////////////////////
+    /////////////////////////////////////////////////////
+
+    @Parameter(name = ApiConstants.ID, type = CommandType.UUID, required = true, entityType = SystemVmResponse.class,
+            validations = {ApiArgValidator.PositiveNumber},
+            description = "The ID of the system VM appliance to live patch")
+    private Long id;
+
+    @Parameter(name = ApiConstants.TOKEN, type = CommandType.STRING,
+            description = "Ping token")
+    private String token;
+
+    /////////////////////////////////////////////////////
+    /////////////////// Accessors ///////////////////////
+    /////////////////////////////////////////////////////
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getToken() {
+        return token;
+    }
+
+    /////////////////////////////////////////////////////
+    /////////////// API Implementation///////////////////
+    /////////////////////////////////////////////////////
+
+    @Override
+    public String getCommandName() {
+        return APINAME.toLowerCase() + BaseCmd.RESPONSE_SUFFIX;
+    }
+
+    @Override
+    public long getEntityOwnerId() {
+        return Account.ACCOUNT_ID_SYSTEM;
+    }
+
+    @Override
+    public void execute() {
+        String reply = applianceAgentService.livePatch(this);
+        SuccessResponse response = new SuccessResponse();
+        response.setDisplayText(reply);
+        response.setSuccess(!Strings.isNullOrEmpty(reply));
+        response.setResponseName(getCommandName());
+        setResponseObject(response);
+    }
+}

framework/appliance-agent/agent/agent.go

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+// Virtual Appliance Agent
+package main
+
+import (
+	"context"
+	"log"
+	"net"
+
+	"google.golang.org/grpc"
+	pb "./virtualappliance"
+)
+
+const (
+	port = ":8200"
+)
+
+type server struct{}
+
+func (s *server) Ping(ctx context.Context, in *pb.PingRequest) (*pb.PingResponse, error) {
+	log.Printf("Received: %v", in.Message)
+	return &pb.PingResponse{Message: "Pong " + in.Message}, nil
+}
+
+func main() {
+	lis, err := net.Listen("tcp", port)
+	if err != nil {
+		log.Fatalf("failed to listen: %v", err)
+	}
+	s := grpc.NewServer()
+	pb.RegisterApplianceAgentServer(s, &server{})
+	if err := s.Serve(lis); err != nil {
+		log.Fatalf("failed to serve: %v", err)
+	}
+}

framework/appliance-agent/agent/testclient.go

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+package main
+
+import (
+	"context"
+	"log"
+	"os"
+	"time"
+
+	"google.golang.org/grpc"
+	pb "./virtualappliance"
+)
+
+const (
+	address     = "localhost:50051"
+	defaultName = "client123"
+)
+
+func main() {
+	conn, err := grpc.Dial(address, grpc.WithInsecure())
+	if err != nil {
+		log.Fatalf("did not connect: %v", err)
+	}
+	defer conn.Close()
+	c := pb.NewApplianceAgentClient(conn)
+
+	name := defaultName
+	if len(os.Args) > 1 {
+		name = os.Args[1]
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	defer cancel()
+	r, err := c.Ping(ctx, &pb.PingRequest{Message: name})
+	if err != nil {
+		log.Fatalf("could not ping due to: %v", err)
+	}
+	log.Printf("Pinging: %s", r.Message)
+}