1.什么是Docker-Compose

上一章我们讲了通过Dockerfile创建镜像，这在一个小项目中是没问题的，但如果在一个包含多个项目的情况下，我们每次部署都需要执行多次创建镜像与运行容器的命令，这样就比较麻烦，为了解决这种情况，Docker-Compose出现了。Docker-Compose主要就是为了解决在一台服务器创建镜像与运行容器复杂的问题，有了Docker-Compose我们就可以通过一条命令，生成多镜像与运行容器。

2.Docker-Compose安装

sudo curl -L "https://github.com/docker/compose/releases/download/1.23.1/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

sudo chmod +x /usr/local/bin/docker-compose

查看安装是否成功

3.创建两个.netcore项目，不启用https

ServerProvider项目

新增Dockerfile

FROM microsoft/dotnet:2.1-aspnetcore-runtime

MAINTAINER yishi.chen

LABEL description="this is a serverprovider website"

LABEL version="1.0"

ARG serverport

WORKDIR /app

COPY bin/Release/netcoreapp2.1/publish/ .

EXPOSE $serverport

ENTRYPOINT ["dotnet","ServerProvider.dll"]

Program.cs改动

        public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>

            WebHost.CreateDefaultBuilder(args)

                .UseUrls($"http://*:{Environment.GetEnvironmentVariable("serverport")}")

                .UseStartup<Startup>();

ValuesController.cs改动

using System;

using System.Collections.Generic;

using System.Linq;

using System.Threading.Tasks;

using Microsoft.AspNetCore.Mvc;

namespace ServerProvider.Controllers

{

    [Route("api/[controller]")]

    [ApiController]

    public class ValuesController : ControllerBase

    {

        // GET api/values

        [HttpGet]

        public ActionResult<IEnumerable<string>> Get()

        {

            return new string[] { "this is serverprovider's result" };

        }

    }

}

ServerConsumer项目

新增Dockerfile

FROM microsoft/dotnet:2.1-aspnetcore-runtime

MAINTAINER yishi.chen

LABEL description="this is a serverconsumer website"

LABEL version="1.0"

ARG consumerport

WORKDIR /app

COPY bin/Release/netcoreapp2.1/publish/ .

EXPOSE $consumerport

ENTRYPOINT ["dotnet","ServerComsumer.dll"]

Program.cs改动

        public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>

            WebHost.CreateDefaultBuilder(args)

                .UseUrls($"http://*:{Environment.GetEnvironmentVariable("consumerport")}")

                .UseStartup<Startup>();

ValueController.cs改动

using System;

using System.Collections.Generic;

using System.Linq;

using System.Net.Http;

using System.Net.Http.Headers;

using System.Threading.Tasks;

using Microsoft.AspNetCore.Mvc;

namespace ServerComsumer.Controllers

{

    [Route("api/[controller]")]

    [ApiController]

    public class ValuesController : ControllerBase

    {

        // GET api/values

        [HttpGet]

        public ActionResult<IEnumerable<string>> Get()

        {

            return new string[] { "value1", "value2" };

        }

        // GET api/values/5

        [HttpGet("{id}")]

        public async Task<ActionResult<string>> Get(int id)

        {

            var httpClient = new HttpClient();

            httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

            return await httpClient.GetAsync(Environment.GetEnvironmentVariable("serverurl")).Result.Content.ReadAsStringAsync();

        }

    }

}

新建docker-compose.yml编排文件

内容如下（docker-compose的配置请见https://www.cnblogs.com/chenyishi/p/9965479.html）：

version: '3'

services:

  s_provider:

    build:

      context: ./ServerProvider/

      dockerfile: Dockerfile

      args:

        serverport: 1000

    ports:

      - "1000:1000"

    environment:

      serverport: 1000

    container_name: c_provider

  s_consumer:

    build:

      context: ./ServerComsumer/

      dockerfile: Dockerfile

      args:

        consumerport: 2000

    ports:

      - "2000:2000"

    links:

      - s_provider:s_provider

    environment:

      consumerport: 2000

      serverurl: http://s_provider:1000/api/values/

    container_name: c_consumer

4.定位到docker-compose文件所在目录，运行docker-compose

[root@cys-test-centos WebDocker]# docker-compose up

运行成功，状态如下：

5.另起一个命令窗口，测试接口

[root@cys-test-centos ~]# curl http://localhost:1000/api/values

["this is serverprovider's result"]

root@cys-test-centos ~]# curl http://localhost:2000/api/values

["value1","value2"]

[root@cys-test-centos ~]# curl http://localhost:2000/api/values/1

["this is serverprovider's result"]

以上是通过docker-compose 新建镜像，并运行容器，如果镜像已存在，则可以去掉构建的过程，我们稍微对docker-compose文件做一下调整

6.在上面步骤的前提下，先CtrlC停止容器，然后docker-compsoe down删除容器

[root@cys-test-centos WebDocker]# docker-compose down

Removing c_consumer ... done

Removing c_provider ... done

Removing network webdocker_default

7.查看生成的镜像

[root@cys-test-centos WebDocker]# docker images

REPOSITORY             TAG                      IMAGE ID            CREATED             SIZE

webdocker_s_consumer   latest                   cc95654856e1         minutes ago      253MB

webdocker_s_provider   latest                   5b744758b56b         minutes ago      253MB

microsoft/dotnet       2.1-aspnetcore-runtime   db366d73508b         days ago          253MB

镜像名为：webdocker_s_provider与webdocker_s_consumer

8.修改docker-compose.yml文件

version: '3'

services:

  s_provider:

    image: webdocker_s_provider

    ports:

      - "1000:1000"

    environment:

      serverport: 1000

    container_name: c_provider

  s_consumer:

    image: webdocker_s_consumer

    ports:

      - "2000:2000"

    links:

      - s_provider:s_provider

    environment:

      consumerport: 2000

      serverurl: http://s_provider:1000/api/values/

    container_name: c_consumer

9.验证接口

[root@cys-test-centos ~]# curl http://localhost:2000/api/values/1

["this is serverprovider's result"]

到此Docker-Compose介绍完毕，下一章讲Docker三剑客之Docker-machine

巴特西

CentOS下Docker与.netcore(三）之三剑客之一Docker-Compose

1.什么是Docker-Compose

2.Docker-Compose安装

3.创建两个.netcore项目，不启用https

4.定位到docker-compose文件所在目录，运行docker-compose

5.另起一个命令窗口，测试接口

6.在上面步骤的前提下，先CtrlC停止容器，然后docker-compsoe down删除容器

7.查看生成的镜像

8.修改docker-compose.yml文件

到此Docker-Compose介绍完毕，下一章讲Docker三剑客之Docker-machine

最新文章

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巴特西

CentOS下Docker与.netcore(三）之 三剑客之一Docker-Compose

1.什么是Docker-Compose

2.Docker-Compose安装

3.创建两个.netcore项目，不启用https

4.定位到docker-compose文件所在目录，运行docker-compose

5.另起一个命令窗口，测试接口

6.在上面步骤的前提下，先CtrlC停止容器，然后docker-compsoe down删除容器

7.查看生成的镜像

8.修改docker-compose.yml文件

到此Docker-Compose介绍完毕，下一章讲Docker三剑客之Docker-machine

最新文章

热门文章

CentOS下Docker与.netcore(三）之三剑客之一Docker-Compose