add consul discovery.

src/DotNetCore.CAP/NodeDiscovery/IDiscoveryProviderFactory.Default.cs

+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace DotNetCore.CAP.NodeDiscovery
+{
+    class DiscoveryProviderFactory : IDiscoveryProviderFactory
+    {
+        public INodeDiscoveryProvider Get(NodeConfiguration configuration)
+        {
+            if (configuration == null)
+            {
+                return null;
+            }
+
+            return new ConsulNodeDiscoveryProvider(configuration.ServerHostName, configuration.ServerProt);
+        }
+    }
+}

src/DotNetCore.CAP/NodeDiscovery/IDiscoveryProviderFactory.cs

+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace DotNetCore.CAP.NodeDiscovery
+{
+    interface IDiscoveryProviderFactory
+    {
+        INodeDiscoveryProvider Get(NodeConfiguration configuration);
+    }
+}

src/DotNetCore.CAP/NodeDiscovery/INodeDiscoveryProvider.Consul.cs

+using System;
+using System.Linq;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading.Tasks;
+using Consul;
+
+namespace DotNetCore.CAP.NodeDiscovery
+{
+    class ConsulNodeDiscoveryProvider : INodeDiscoveryProvider
+    {
+        private readonly string _hostName;
+        private readonly int _port;
+
+        private readonly ConsulClient _consul;
+
+        public ConsulNodeDiscoveryProvider(string hostName, int port)
+        {
+            _hostName = hostName;
+            _port = port;
+
+            _consul = new ConsulClient(config =>
+            {
+                config.Address = new Uri($"http://{_hostName}:{_port}");
+            });
+        }
+
+        public async Task<IList<Node>> GetNodes()
+        {
+            var members = await _consul.Agent.Members(false);
+
+            var nodes = members.Response.Select(x => new Node
+            {
+                Address = x.Addr,
+                Name = x.Name
+            });
+
+            return nodes.ToList();
+        }
+
+        public Task RegisterNode(string address, int port)
+        {
+            //CatalogRegistration registration = new CatalogRegistration();
+            //registration.Node = "CAP";
+            //registration.Address = "192.168.2.55";
+            //registration.Service = new AgentService
+            //{
+            //    Port = 5000,
+            //    Service = "CAP.Test.Service"
+            //};
+            //return _consul.Catalog.Register(registration);
+
+            return _consul.Agent.ServiceRegister(new AgentServiceRegistration
+            {
+                Name = "CAP",
+                Port = port,
+                Address = address,
+                Tags = new string[] { "CAP", "Client", "Dashboard" },
+                Check = new AgentServiceCheck
+                {
+                    DeregisterCriticalServiceAfter = TimeSpan.FromSeconds(30),
+                    Interval = TimeSpan.FromSeconds(10),
+                    Status = HealthStatus.Passing,
+                    HTTP = "/CAP"
+                }
+            });
+        }
+    }
+}

src/DotNetCore.CAP/NodeDiscovery/INodeDiscoveryProvider.cs

+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DotNetCore.CAP.NodeDiscovery
+{
+    interface INodeDiscoveryProvider
+    {
+        Task<IList<Node>> GetNodes();
+
+        Task RegisterNode(string address, int port);
+    }
+}

src/DotNetCore.CAP/NodeDiscovery/IProcessingServer.Consul.cs

+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace DotNetCore.CAP.NodeDiscovery
+{
+    class ConsulProcessingNodeServer : IProcessingServer
+    {
+        private readonly DashboardOptions dashboardOptions;
+        private readonly IDiscoveryProviderFactory discoveryProviderFactory;
+
+        public ConsulProcessingNodeServer(
+            DashboardOptions dashboardOptions,
+            IDiscoveryProviderFactory discoveryProviderFactory)
+        {
+            this.dashboardOptions = dashboardOptions;
+            this.discoveryProviderFactory = discoveryProviderFactory;
+        }
+
+        public void Start()
+        {
+            if (dashboardOptions.Discovery != null)
+            {
+                var discoveryProvider = discoveryProviderFactory.Get(dashboardOptions.Discovery);
+                discoveryProvider.RegisterNode("192.168.2.55", dashboardOptions.Discovery.CurrentPort);
+            }
+        }
+
+        public void Pulse()
+        {
+
+        }
+
+        public void Dispose()
+        {
+
+        }
+    }
+}

src/DotNetCore.CAP/NodeDiscovery/Node.cs

+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace DotNetCore.CAP.NodeDiscovery
+{
+    class Node
+    {
+
+        public string Name { get; set; }
+
+        public string Address { get; set; }
+
+
+    }
+}

src/DotNetCore.CAP/NodeDiscovery/ServerNodeConfiguration.cs

+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace DotNetCore.CAP.NodeDiscovery
+{
+    public class NodeConfiguration
+    {
+        public string ServerHostName { get; set; }
+
+        public int ServerProt { get; set; }
+
+        public int CurrentPort { get; set; }
+
+        public string PathMatch { get; set; } = "/cap";
+    }
+}