相關博文: "Ubuntu 簡單安裝 Docker" "Mac OS、Ubuntu 安裝及使用 Consul" "Consul 服務註冊與服務發現" "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 註冊 A ...
相關博文:
閱讀目錄:
- Docker 運行 Consul 環境
- Docker 運行 Fabio 環境
- 使用 Consul 註冊 ASP.NET Core 2.0 服務
- 使用 Docker 發佈部署 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 應用程式,然後在 Ubuntu 伺服器配置 Docker 環境,並使用 Docker 運行 Consul 和 Fabio 環境,最後使用 Docker 運行 ASP.NET Core 2.0 應用程式。
你要的項目源碼:https://github.com/yuezhongxin/HelloDocker.Sample
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,並且花了很多的時間去解決,比如 Docker 運行 Consul 和 Fabio,下麵詳細說下過程。
1. Docker 運行 Consul 環境
關於 Consul 的概念:
Consul 是 HashiCorp 公司推出的開源工具,用於實現分散式系統的服務發現與配置。與其他分散式服務註冊與發現的方案,比如 Airbnb 的 SmartStack 等相比,Consul 的方案更“一站式”,內置了服務註冊與發現框 架、分佈一致性協議實現、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(需要獨立伺服器環境),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
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=host
:host
網路模式,容器的網路介面和主機一樣,也就是共用一個 IP 地址,如果沒有此命令,預設是bridge
網路模式,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(埠也是獨立的),並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,需要內網伺服器之前可以相互訪問到,註意並不是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。
一臺伺服器一般會配置一個 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 之後,一臺伺服器就可以配置多個 Consul Client,我們就可以使用bridge
網路模式,一臺伺服器可以完成配置整個 Consul 集群環境。
這裡需要再重點說下-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
-client
option 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=0.0.0.0
option to bind to all interfaces.
啥意思呢?Consul 服務註冊的時候,一般是通過 HTTP API 介面進行註冊,比如:http://10.9.10.190:8500/v1/agent/service/register,就是往 Consul 集群中註冊服務,需要註意的是,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,就是用來服務註冊並能訪問到的地址,換句話說,服務註冊可以跨伺服器(服務和 Consul Client 並不需要在同一臺伺服器上),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。
這裡需要再說明下,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,並且配置 Consul 和 Fabio 環境,這樣容器就會很臃腫,並且每次發佈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,後來沒辦法,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。
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 10.9.10.89
2017/11/14 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 softlayer
2017/11/14 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 available
2017/11/14 06:40:52 [ERR] agent: failed to sync remote state: No known Consul servers
2017/11/14 06:40:52 [INFO] serf: EventMemberJoin: agent_1 10.9.2.236
2017/11/14 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 agents
2017/11/14 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:
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,用於部署 Consul 管理的微服務。
Fabio Docker 鏡像地址:https://hub.docker.com/r/magiconair/fabio/
配置命令:
$ docker run -d --net=host --name=fabio -e 'registry_consul_addr=10.9.10.89:8500' magiconair/fabio
執行日誌:
$ 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"
}
需要註意的兩個屬性值:
Proxy.LocalIP:10.0.2.15
:綁定本機的 IP 地址,伺服器的 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,後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),然後vim fabio.properties
增加下麵配置:
registry.consul.register.addr = 10.9.10.89:9998
registry.consul.addr = 10.9.10.89:8500
registry.consul.register.addr
綁定 Fabio 地址(本機 IP 地址),registry.consul.addr
綁定 Consul 地址。
然後切換到/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
查看執行日誌:
$ 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:
也可以直接瀏覽 http://10.9.10.89:9998/routes?filter=,查看已經註冊的服務:
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):
3. 使用 Consul 註冊 ASP.NET Core 2.0 服務
在 Mac OS 中使用 VS Code 開發 ASP.NET Core 2.0 應用程式,就像寫 Markdown 一樣方便。
Consul 註冊 ASP.NET Core 2.0 服務,使用的是 Consul 組件,地址:https://github.com/PlayFab/consuldotnet
安裝程式包(VS Code 需要使用NuGet Pakcage Manager
命令安裝):
> install-package Conusl
然後添加一個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($"http://{Program.IP}:8500"));//如果服務和 Consul 在同一臺伺服器上,使用此代碼
var consulClient = new ConsulClient(x => x.Address = new Uri($"http://10.9.10.89:8500"));//請求註冊的 Consul 地址
var httpCheck = new AgentServiceCheck()
{
DeregisterCriticalServiceAfter = TimeSpan.FromSeconds(5),//服務啟動多久後註冊
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 consul
var registration = new AgentServiceRegistration()
{
Checks = new[] { httpCheck },
ID = Guid.NewGuid().ToString(),
Name = Program.ServiceName,
Address = Program.IP,
Port = Program.Port,
Tags = new[] { $"urlprefix-/{Program.ServiceName}" }//添加 urlprefix-/servicename 格式的 tag 標簽,以便 Fabio 識別
};
consulClient.Agent.ServiceRegister(registration).Wait();//服務啟動時註冊,內部實現其實就是使用 Consul API 進行註冊(HttpClient發起)
lifetime.ApplicationStopping.Register(() =>
{
consulClient.Agent.ServiceDeregister(registration.ID).Wait();//服務停止時取消註冊
});
return app;
}
}
Start.cs
配置代碼:
public void Configure(IApplicationBuilder app, IHostingEnvironment env,
ILoggerFactory loggerFactory, IApplicationLifetime lifetime)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseMvc();
app.RegisterWithConsul(lifetime);//here
}
Program.cs
配置代碼:
public class Program
{
public static string IP = "";
public const int Port = 54917;
public const string ServiceName = "hello-docker";
public const string Version = "v1";
public static void Main(string[] args)
{
//Program.IP = LocalIPAddress;//使用 Docker 的時候,獲取的是 IP 地址不正確,需要進行完善
Program.IP = "10.9.10.190";//Docker 容器中的 IP 地址,如果使用 host 網路模式,也是主機的 IP 地址
BuildWebHost(args).Run();
}
public static IWebHost BuildWebHost(string[] args) =>
WebHost.CreateDefaultBuilder(args)
.UseUrls($"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()
: "";
}
}
}
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 發佈部署 ASP.NET Core 2.0 服務
我們需要在 ASP.NET Core 2.0 應用程式目錄下,添加一個Dockerfile
文件,用來構建自定義鏡像(命令參考:使用 Dockerfile 定製鏡像),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,還原程式包併發布,然後再使用microsoft/aspnetcore
鏡像,運行 ASP.NET Core 2.0 應用程式。
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 3b7e8c5d01f4
Restoring 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.dll
HelloDocker.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,構建完鏡像之後,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
hello-docker
下麵沒命名的鏡像,是臨時生成的,作用是使用microsoft/aspnetcore-build
鏡像,還原程式包的時候,不需要重新安裝了。
另外,我們可以在 ASP.NET Core 2.0 應用程式目錄下,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 應用程式,我打算運行在 Mac OS 系統中,也就是說服務和 Consul 是跨伺服器的。
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.
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:
或者查看 Fabio UI 中的服務是否存在(通過健康檢查後會出現):
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