NETframework,Docker Consul Fabio ASP.NET Core 2.0 微服務跨平臺實踐

 2023-11-19 阅读 19 评论 0

摘要:相關博文: Ubuntu 簡單安裝 DockerMac OS、Ubuntu 安裝及使用 ConsulConsul 服務注冊與服務發現Fabio 安裝和簡單使用閱讀目錄: Docker 運行 Consul 環境Docker 運行 Fabio 環境使用 Consul 注冊 ASP.NET Core 2.0 服務使用 Docker 發布部署 ASP.NET Core 2.0 服

相關博文:

  • Ubuntu 簡單安裝 Docker
  • Mac OS、Ubuntu 安裝及使用 Consul
  • Consul 服務注冊與服務發現
  • Fabio 安裝和簡單使用

閱讀目錄:

  • Docker 運行 Consul 環境
  • Docker 運行 Fabio 環境
  • 使用 Consul 注冊 ASP.NET Core 2.0 服務
  • 使用 Docker 發布部署 ASP.NET Core 2.0 服務

本篇博文的目的:在 Mac OS 中使用 VS Code 開發 ASP.NET Core 2.0 應用程序,然后在 Ubuntu 服務器配置 Docker 環境,并使用 Docker 運行 Consul 和 Fabio 環境,最后使用 Docker 運行 ASP.NET Core 2.0 應用程序。

你要的項目源碼:https://github.com/yuezhongxin/HelloDocker.Sample

NETframework、上面配置看起來還蠻簡單,但實際去操作的時候,還是遇到了蠻多的問題,并且花了很多的時間去解決,比如 Docker 運行 Consul 和 Fabio,下面詳細說下過程。

1. Docker 運行 Consul 環境

關于 Consul 的概念:

Consul 是 HashiCorp 公司推出的開源工具,用于實現分布式系統的服務發現與配置。與其他分布式服務注冊與發現的方案,比如 Airbnb 的 SmartStack 等相比,Consul 的方案更“一站式”,內置了服務注冊與發現框 架、分布一致性協議實現、健康檢查、Key/Value 存儲、多數據中心方案,不再需要依賴其他工具(比如 ZooKeeper 等)。使用起來也較 為簡單。Consul 用 Golang 實現,因此具有天然可移植性(支持 Linux、windows 和 Mac OS X);安裝包僅包含一個可執行文件,方便部署,與 Docker 等輕量級容器可無縫配合。

Consul Docker 鏡像地址:https://hub.docker.com/_/consul/

配置 Consul 的微服務集群環境,需要先配置下 Server 服務端(需要獨立服務器環境),配置命令(沒有使用 Docker):

$ consul agent -server -bootstrap-expect 1 -data-dir /tmp/consul -ui-dir=./dist  -config-dir /etc/consul.d -bind=10.9.10.110

ASP、一開始,我想在 Mac OS 環境中使用 Docker 配置 Consul Client 客戶端,但遇到了一些問題,配置命令:

$ docker run -d --net=host --name=consul-client consul agent -bind=10.9.10.190 -client=0.0.0.0 -node=mac-xishuai -retry-join=10.9.10.236

先解析下命令的意思:

  • --net=hosthost網絡模式,容器的網絡接口和主機一樣,也就是共享一個 IP 地址,如果沒有此命令,默認是bridge網絡模式,也就是我們常用的橋接模式,Docker 會分配給容器一個獨立的 IP 地址(端口也是獨立的),并且容器和主機之間可以相互訪問。
  • -bind=:Consul Client 綁定的 IP 地址,一般是內網的私有 IP 地址,需要內網服務器之前可以相互訪問到,注意并不是127.0.0.1
  • -retry-join=:加入 Consul 集群中,地址是 Consul Server 的 IP 地址,也可以是-join=,加上retry會不斷進行重試。

一臺服務器一般會配置一個 Consul Client,所以我們可以直接讓 Consul 容器和主機的 IP 地址一樣(我使用的),但使用了 Docker 之后,一臺服務器就可以配置多個 Consul Client,我們就可以使用bridge網絡模式,一臺服務器可以完成配置整個 Consul 集群環境。

這里需要再重點說下-client=,一開始我沒有理解,先看下官方說明:

If you want to expose the Consul interfaces to other containers via a different network, such as the bridge network, use the-clientoption for Consul.
With this configuration, Consul's client interfaces will be bound to the bridge IP and available to other containers on that network, but not on the host network. Note that we still keep the cluster address out on the host network for performance. Consul will also accept the-client=0.0.0.0option to bind to all interfaces.

ADO.NET、啥意思呢?Consul 服務注冊的時候,一般是通過 HTTP API 接口進行注冊,比如:http://10.9.10.190:8500/v1/agent/service/register,就是往 Consul 集群中注冊服務,需要注意的是,10.9.10.190一般是 Consul Client 的 IP 地址(也可以是 Consul Server),-client配置的就是此地址,簡單來說,就是用來服務注冊并能訪問到的地址,換句話說,服務注冊可以跨服務器(服務和 Consul Client 并不需要在同一臺服務器上),0.0.0.0表示任何本機的相關 IP 地址都可以訪問,推薦此配置。

這里需要再說明下,Docker 部署 ASP.NET Core 2.0、Consul 和 Fabio 有兩種方式:

  • 使用一個 Docker 容器:很簡單,在一個容器中完成服務部署,并且配置 Consul 和 Fabio 環境,這樣容器就會很臃腫,并且每次發布的時候都得重新配置 Consul 和 Fabio 環境,如果服務很多的話,想想就覺得恐怖。
  • 分別獨立 Docker 容器:服務部署、配置 Consul 和 Fabio 環境,都是獨立容器實現,互不影響,也可以跨服務實現,簡單靈活。

顯而易見,推薦第二種方式。

回到正題,上面配置命令,在 Mac OS 報如下錯誤:

$ docker logs consul-client
==> Starting Consul agent...
==> Error starting agent: Failed to start Consul client: Failed to start lan serf: Failed to create memberlist: Could not set up network transport: failed to obtain an address: Failed to start TCP listener on "10.9.10.190" port 8301: listen tcp 10.9.10.190:8301: bind: cannot assign requested address

這個問題花了很多時間也沒有解決,奇怪的是不使用 Docker,直接運行 Consul Client 配置命令,卻是可以的,后來沒辦法,我就在 Mac OS 中使用 Ubuntu 虛擬機了(版本 14.04),使用的 Vagrant 管理工具。

2.0。再重新運行配置命令:

$ docker run -d --net=host --name=consul-client consul agent -bind=10.9.10.89 -client=0.0.0.0 -node=vagrant-ubuntu-xishuai -retry-join=10.9.2.236$ docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
9c4988cf475f        consul              "docker-entrypoint..."   2 seconds ago       Up 2 seconds                            consul-client$ docker logs consul-client
==> Starting Consul agent...
==> Consul agent running!Version: 'v1.0.0'Node ID: '34e63f0a-d361-f152-3803-b9fda0642e4d'Node name: 'vagrant-ubuntu-xishuai'Datacenter: 'dc1' (Segment: '')Server: false (Bootstrap: false)Client Addr: [0.0.0.0] (HTTP: 8500, HTTPS: -1, DNS: 8600)Cluster Addr: 10.9.10.89 (LAN: 8301, WAN: 8302)Encrypt: Gossip: false, TLS-Outgoing: false, TLS-Incoming: false==> Log data will now stream in as it occurs:2017/11/14 06:40:52 [INFO] serf: EventMemberJoin: vagrant-ubuntu-xishuai 10.9.10.892017/11/14 06:40:52 [INFO] agent: Started DNS server 0.0.0.0:8600 (udp)2017/11/14 06:40:52 [INFO] agent: Started DNS server 0.0.0.0:8600 (tcp)2017/11/14 06:40:52 [INFO] agent: Started HTTP server on [::]:8500 (tcp)2017/11/14 06:40:52 [INFO] agent: Retry join LAN is supported for: aws azure gce softlayer2017/11/14 06:40:52 [INFO] agent: Joining LAN cluster...2017/11/14 06:40:52 [INFO] agent: (LAN) joining: [10.9.2.236]2017/11/14 06:40:52 [WARN] manager: No servers available2017/11/14 06:40:52 [ERR] agent: failed to sync remote state: No known Consul servers2017/11/14 06:40:52 [INFO] serf: EventMemberJoin: agent_1 10.9.2.2362017/11/14 06:40:52 [INFO] agent: (LAN) joined: 1 Err: <nil>2017/11/14 06:40:52 [INFO] agent: Join LAN completed. Synced with 1 initial agents2017/11/14 06:40:52 [INFO] consul: adding server agent_1 (Addr: tcp/10.9.2.236:8300) (DC: dc1)

打開 Consul UI 界面,就可以看到我們配置的 Consul Client 了:

435188-20171114220608593-356241440.png

2. Docker 運行 Fabio 環境

Fabio 是一個快速、現代、zero-conf 負載均衡 HTTP(S) 路由器,用于部署 Consul 管理的微服務。

Fabio Docker 鏡像地址:https://hub.docker.com/r/magiconair/fabio/

docker wsl,配置命令:

$ docker run -d --net=host --name=fabio -e 'registry_consul_addr=10.9.10.89:8500' magiconair/fabio

執行日志:

$ docker logs fabio
2017/11/14 09:43:49 [INFO] Setting log level to INFO
2017/11/14 09:43:49 [INFO] Runtime config
{"Proxy": {"Strategy": "rnd","Matcher": "prefix","NoRouteStatus": 404,"MaxConn": 10000,"ShutdownWait": 0,"DialTimeout": 30000000000,"ResponseHeaderTimeout": 0,"KeepAliveTimeout": 0,"FlushInterval": 1000000000,"LocalIP": "10.0.2.15","ClientIPHeader": "","TLSHeader": "","TLSHeaderValue": "","GZIPContentTypes": null,"RequestID": ""},"Registry": {"Backend": "consul","Static": {"Routes": ""},"File": {"Path": ""},"Consul": {"Addr": "10.9.10.89:8500","Scheme": "http","Token": "","KVPath": "/fabio/config","TagPrefix": "urlprefix-","Register": true,"ServiceAddr": ":9998","ServiceName": "fabio","ServiceTags": null,"ServiceStatus": ["passing"],"CheckInterval": 1000000000,"CheckTimeout": 3000000000,"CheckScheme": "http","CheckTLSSkipVerify": false},"Timeout": 10000000000,"Retry": 500000000},"Listen": [{"Addr": ":9999","Proto": "http","ReadTimeout": 0,"WriteTimeout": 0,"CertSource": {"Name": "","Type": "","CertPath": "","KeyPath": "","ClientCAPath": "","CAUpgradeCN": "","Refresh": 0,"Header": null},"StrictMatch": false,"TLSMinVersion": 0,"TLSMaxVersion": 0,"TLSCiphers": null}],"Log": {"AccessFormat": "common","AccessTarget": "","RoutesFormat": "delta","Level": "INFO"},"Metrics": {"Target": "","Prefix": "{{clean .Hostname}}.{{clean .Exec}}","Names": "{{clean .Service}}.{{clean .Host}}.{{clean .Path}}.{{clean .TargetURL.Host}}","Interval": 30000000000,"Timeout": 10000000000,"Retry": 500000000,"GraphiteAddr": "","StatsDAddr": "","Circonus": {"APIKey": "","APIApp": "fabio","APIURL": "","CheckID": "","BrokerID": ""}},"UI": {"Listen": {"Addr": ":9998","Proto": "http","ReadTimeout": 0,"WriteTimeout": 0,"CertSource": {"Name": "","Type": "","CertPath": "","KeyPath": "","ClientCAPath": "","CAUpgradeCN": "","Refresh": 0,"Header": null},"StrictMatch": false,"TLSMinVersion": 0,"TLSMaxVersion": 0,"TLSCiphers": null},"Color": "light-green","Title": "","Access": "rw"},"Runtime": {"GOGC": 800,"GOMAXPROCS": 1},"ProfileMode": "","ProfilePath": "/tmp"
}

需要注意的兩個屬性值:

  • Proxy.LocalIP:10.0.2.15:綁定本機的 IP 地址,服務器的 IP 地址是10.9.10.89,所以配置的10.0.2.15是錯誤的,這個 IP 地址內網是訪問不了的。
  • Registry.Consul.Addr:10.9.10.89:8500:綁定 Consul 地址,我們上面已經完成的 Consul Client 地址就是10.9.10.89:8500,所以是正確的。

這個配置命令研究了好久,也沒有解決綁定本機 IP 地址的問題,后來又找到了另外一種方式。

首先,在/etc/fabio/目錄下創建一個fabio.properties文件(示例配置),然后vim fabio.properties增加下面配置:

registry.consul.register.addr = 10.9.10.89:9998registry.consul.addr = 10.9.10.89:8500

docker微服務、registry.consul.register.addr綁定 Fabio 地址(本機 IP 地址),registry.consul.addr綁定 Consul 地址。

然后切換到/etc/fabio/目錄,執行配置命令:

$ docker run -d -p 9999:9999 -p 9998:9998 --net=host --name=fabio -v $PWD/fabio.properties:/etc/fabio/fabio.properties magiconair/fabio$ docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED              STATUS              PORTS               NAMES
301fe4a5b40b        magiconair/fabio    "/fabio -cfg /etc/..."   About a minute ago   Up About a minute                       fabio
9c4988cf475f        consul              "docker-entrypoint..."   4 hours ago          Up 4 hours                              consul-client

查看執行日志:

$ docker logs fabio
2017/11/14 10:10:58 [INFO] Version 1.5.3 starting
2017/11/14 10:10:58 [INFO] Go runtime is go1.9.2
2017/11/14 10:10:58 [INFO] Metrics disabled
2017/11/14 10:10:58 [INFO] Setting GOGC=800
2017/11/14 10:10:58 [INFO] Setting GOMAXPROCS=1
2017/11/14 10:10:58 [INFO] consul: Connecting to "10.9.10.89:8500" in datacenter "dc1"
2017/11/14 10:10:58 [INFO] Admin server access mode "rw"
2017/11/14 10:10:58 [INFO] Admin server listening on ":9998"
2017/11/14 10:10:58 [INFO] Waiting for first routing table
2017/11/14 10:10:58 [INFO] consul: Using dynamic routes
2017/11/14 10:10:58 [INFO] consul: Using tag prefix "urlprefix-"
2017/11/14 10:10:58 [INFO] consul: Watching KV path "/fabio/config"
2017/11/14 10:10:58 [INFO] consul: Manual config changed to #3723938
2017/11/14 10:10:58 [INFO] HTTP proxy listening on :9999
2017/11/14 10:10:58 [INFO] Access logging disabled
2017/11/14 10:10:58 [INFO] Using routing strategy "rnd"
2017/11/14 10:10:58 [INFO] Using route matching "prefix"
2017/11/14 10:10:58 [INFO] consul: Health changed to #3727339
2017/11/14 10:10:59 [INFO] consul: Registered fabio with id "fabio-vagrant-ubuntu-trusty-9998"
2017/11/14 10:10:59 [INFO] consul: Registered fabio with address "10.9.10.89"
2017/11/14 10:10:59 [INFO] consul: Registered fabio with tags ""
2017/11/14 10:10:59 [INFO] consul: Registered fabio with health check to "http://[10.9.10.89]:9998/health"
2017/11/14 10:11:00 [INFO] Config updates

可以通過 Consul UI,進行查看 Fabio 是否正常:

435188-20171114220630952-383243943.png

aspnet教程,也可以直接瀏覽 http://10.9.10.89:9998/routes?filter=,查看已經注冊的服務:

435188-20171114220650484-1660488026.png

其實,如果不清楚配置命令的話,我們也可以查看 Consul 源碼,有可能會幫助我們熟悉命令,比如(https://github.com/fabiolb/fabio/blob/master/registry/consul/register.go):

435188-20171114220700921-225210511.png

3. 使用 Consul 注冊 ASP.NET Core 2.0 服務

在 Mac OS 中使用 VS Code 開發 ASP.NET Core 2.0 應用程序,就像寫 Markdown 一樣方便。

docker wordpress、Consul 注冊 ASP.NET Core 2.0 服務,使用的是 Consul 組件,地址:https://github.com/PlayFab/consuldotnet

安裝程序包(VS Code 需要使用NuGet Pakcage Manager命令安裝):

> install-package Conusl

然后添加一個RegisterWithConsul擴展服務:

using System;
using System.Collections.Generic;
using System.Linq;
using Consul;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Hosting.Server.Features;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Http.Features;
using Microsoft.Extensions.DependencyInjection;public static class ApplicationBuilderExtensions
{public static IApplicationBuilder RegisterWithConsul(this IApplicationBuilder app, IApplicationLifetime lifetime){//var consulClient = new ConsulClient(x => x.Address = new Uri($"http://{Program.IP}:8500"));//如果服務和 Consul 在同一臺服務器上,使用此代碼var consulClient = new ConsulClient(x => x.Address = new Uri($"http://10.9.10.89:8500"));//請求注冊的 Consul 地址var httpCheck = new AgentServiceCheck(){DeregisterCriticalServiceAfter = TimeSpan.FromSeconds(5),//服務啟動多久后注冊Interval = TimeSpan.FromSeconds(10),//健康檢查時間間隔,或者稱為心跳間隔HTTP = $"http://{Program.IP}:{Program.Port}/health",//健康檢查地址Timeout = TimeSpan.FromSeconds(5)};// Register service with consulvar registration = new AgentServiceRegistration(){Checks = new[] { httpCheck },ID = Guid.NewGuid().ToString(),Name = Program.ServiceName,Address = Program.IP,Port = Program.Port,Tags = new[] { $"urlprefix-/{Program.ServiceName}" }//添加 urlprefix-/servicename 格式的 tag 標簽,以便 Fabio 識別};consulClient.Agent.ServiceRegister(registration).Wait();//服務啟動時注冊,內部實現其實就是使用 Consul API 進行注冊(HttpClient發起)lifetime.ApplicationStopping.Register(() =>{consulClient.Agent.ServiceDeregister(registration.ID).Wait();//服務停止時取消注冊});return app;}
}

Start.cs配置代碼:

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory, IApplicationLifetime lifetime)
{if (env.IsDevelopment()){app.UseDeveloperExceptionPage();}app.UseMvc();app.RegisterWithConsul(lifetime);//here
}

Program.cs配置代碼:

public class Program
{public static string IP = "";public const int Port = 54917;public const string ServiceName = "hello-docker";public const string Version = "v1";public static void Main(string[] args){//Program.IP = LocalIPAddress;//使用 Docker 的時候,獲取的是 IP 地址不正確,需要進行完善Program.IP = "10.9.10.190";//Docker 容器中的 IP 地址,如果使用 host 網絡模式,也是主機的 IP 地址BuildWebHost(args).Run();}public static IWebHost BuildWebHost(string[] args) =>WebHost.CreateDefaultBuilder(args).UseUrls($"http://*:{Program.Port}").UseStartup<Startup>().Build();public static string LocalIPAddress{get{UnicastIPAddressInformation mostSuitableIp = null;var networkInterfaces = NetworkInterface.GetAllNetworkInterfaces();foreach (var network in networkInterfaces){if (network.OperationalStatus != OperationalStatus.Up)continue;var properties = network.GetIPProperties();if (properties.GatewayAddresses.Count == 0)continue;foreach (var address in properties.UnicastAddresses){if (address.Address.AddressFamily != AddressFamily.InterNetwork)continue;if (IPAddress.IsLoopback(address.Address))continue;return address.Address.ToString();}}return mostSuitableIp != null? mostSuitableIp.Address.ToString(): "";}}
}

freebsd docker,健康檢查配置代碼:

[Route("[controller]")]
public class HealthController : Controller
{private static readonly HttpClient _httpClient;static HealthController(){_httpClient = new HttpClient();}[HttpGet]public IActionResult Get() => Ok("ok");//或者使用fabio進行健康檢查//[Route("")]//[HttpGet]//public async Task<HttpResponseMessage> GetWithFabio() => await _httpClient.GetAsync("http://127.0.0.1:9998/health");
}

4. 使用 Docker 發布部署 ASP.NET Core 2.0 服務

我們需要在 ASP.NET Core 2.0 應用程序目錄下,添加一個Dockerfile文件,用來構建自定義鏡像(命令參考:使用 Dockerfile 定制鏡像),示例:

FROM microsoft/aspnetcore-build AS build-env
WORKDIR /app# copy csproj and restore as distinct layers
COPY *.csproj ./
RUN dotnet restore# copy everything else and build
COPY . ./
RUN dotnet publish -c Release -o out# build runtime image
FROM microsoft/aspnetcore
WORKDIR /app
COPY --from=build-env /app/out .
ENTRYPOINT ["dotnet", "HelloDocker.Web.dll"]

簡單來說,就是先使用microsoft/aspnetcore-build鏡像,還原程序包并發布,然后再使用microsoft/aspnetcore鏡像,運行 ASP.NET Core 2.0 應用程序。

構建鏡像命令:

$ docker build -t hello-docker:v1 .
Sending build context to Docker daemon  41.98kB
Step 1/10 : FROM microsoft/aspnetcore-build AS build-env---> d6273f7c44d4
Step 2/10 : WORKDIR /app---> e37f90cd9aaf
Removing intermediate container a4e4db93ea06
Step 3/10 : COPY *.csproj ./---> 56278755f94c
Step 4/10 : RUN dotnet restore---> Running in 3b7e8c5d01f4Restoring packages for /app/HelloDocker.Web.csproj...Restore completed in 411.99 ms for /app/HelloDocker.Web.csproj.Installing System.Security.Principal.Windows 4.4.0-preview1-25305-02.Installing Microsoft.NETCore.Platforms 2.0.0-preview1-25305-02.Installing System.Security.AccessControl 4.4.0-preview1-25305-02.Installing Microsoft.Win32.Registry 4.3.0.Installing System.Security.Permissions 4.4.0-preview1-25305-02.Installing System.Diagnostics.Process 4.3.0.Installing Newtonsoft.Json 10.0.2.Installing System.Net.Http.WinHttpHandler 4.0.0.Installing CoreCompat.System.Drawing.v2 5.2.0-preview1-r131.Installing System.Data.Common 4.3.0.Installing System.Security.Cryptography.Pkcs 4.3.0.Installing System.Xml.XPath.XmlDocument 4.3.0.Installing Pomelo.EntityFrameworkCore.MySql 2.0.0.Installing MySqlConnector 0.26.4.Installing Pomelo.JsonObject 1.1.1.Installing Consul 0.7.2.3.Installing EPPlus.Core 1.5.2.Generating MSBuild file /app/obj/HelloDocker.Web.csproj.nuget.g.props.Generating MSBuild file /app/obj/HelloDocker.Web.csproj.nuget.g.targets.Restore completed in 5.71 sec for /app/HelloDocker.Web.csproj.---> cdf6ca65acf6
Removing intermediate container 3b7e8c5d01f4
Step 5/10 : COPY . ./---> fffa81d15ddc
Step 6/10 : RUN dotnet publish -c Release -o out---> Running in 291c8eea750f
Microsoft (R) Build Engine version 15.4.8.50001 for .NET Core
Copyright (C) Microsoft Corporation. All rights reserved.HelloDocker.Web -> /app/bin/Release/netcoreapp2.0/HelloDocker.Web.dllHelloDocker.Web -> /app/out/---> 078311772175
Removing intermediate container 291c8eea750f
Step 7/10 : FROM microsoft/aspnetcore---> b97d3cf55223
Step 8/10 : WORKDIR /app---> b0637e3d706b
Removing intermediate container 7095565fbbca
Step 9/10 : COPY --from=build-env /app/out .---> c3cb8a708c4b
Step 10/10 : ENTRYPOINT dotnet HelloDocker.Web.dll---> Running in d4111dc055f8---> 29121f0eb2b0
Removing intermediate container d4111dc055f8
Successfully built 29121f0eb2b0
Successfully tagged hello-docker:v1

上面構建鏡像的過程,非常詳細,我們可以得到很多的信息,這邊就不敘述了,構建完鏡像之后,我們可以查看下是否成功:

$ docker images
REPOSITORY                   TAG                 IMAGE ID            CREATED             SIZE
hello-docker                 v1                  29121f0eb2b0        Less than a second ago   284MB
<none>                       <none>              078311772175        Less than a second ago   1.9GB
microsoft/aspnetcore-build   latest              d6273f7c44d4        4 days ago          1.85GB
microsoft/aspnetcore         latest              b97d3cf55223        4 days ago          280MB
consul                       latest              dff07cab6abd        9 days ago          51.8MB
magiconair/fabio             latest              b0d96559369f        10 days ago         11.8MB

docker hbase、hello-docker下面沒命名的鏡像,是臨時生成的,作用是使用microsoft/aspnetcore-build鏡像,還原程序包的時候,不需要重新安裝了。

另外,我們可以在 ASP.NET Core 2.0 應用程序目錄下,添加.dockerignore文件,來減少我們構建的鏡像文件大小,示例:

bin/*
obj/*

需要說明下,Consul 和 Fabio 我都是部署在虛擬機的 Docker 容器中,ASP.NET Core 2.0 應用程序,我打算運行在 Mac OS 系統中,也就是說服務和 Consul 是跨服務器的。

運行命令:

$ docker run -d -p 54917:54917 --name hello-docker-web hello-docker:v1

查看下是否運行成功:

$ docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED                  STATUS              PORTS                      NAMES
396d42f37185        hello-docker:v1        "dotnet Hello-Dock..."   Less than a second ago   Up 2 seconds        0.0.0.0:54917->54917/tcp   hello-docker-web$ docker logs hello-docker-web
Hosting environment: Production
Content root path: /app
Now listening on: http://[::]:54917
Application started. Press Ctrl+C to shut down.

asp.net web開發框架,可以看到,運行是成功的。

我們可以請求驗證下:

$ curl http://10.9.10.190:54917/api/values
["value1","value2"]

或者使用 Fabio 的網關請求(Fabio 可以用作負載均衡):

$ curl http://10.9.10.89:9999/hello-docker/api/values
["value1","value2"]

我們可以查看 Consul UI 中的服務是否運行正常:

435188-20171115093948312-1302454504.png

net core docker。或者查看 Fabio UI 中的服務是否存在(通過健康檢查后會出現):

435188-20171115093957031-528735595.png

查看資料:

  • Dockerize a .NET Core application
  • consul - Hub.Docker
  • magiconair/fabio - Hub.Docker
  • todo-backend-aspnetcore
  • Docker 結合 Consul 實現的服務發現(一)
  • 使用 Consul 進行服務發現
  • 服務發現 - consul 的介紹、部署和使用
  • fabio Installation
  • Consul + fabio 實現自動服務發現、負載均衡
  • .NET API for Consul
  • Winton.Extensions.Configuration.Consul
  • Configuring .NET Core Applications using Consul
  • Using Consul for Service Discovery with ASP.NET Core
  • Service Discovery And Health Checks In ASP.NET Core With Consul
  • How to self register a service with Consul
  • Nomad and Consul Configuration Overview

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