.NET Microservices] 4. DOCKER & KUBERNETES

1. Docker 설치확인

PS C:\Project\Microservices\PlatformService> docker --version
Docker version 20.10.14, build a224086

설치되어 있지 않으면 Docker Desktop을 설치한다. 

2022.05.03 - [Docker] - Windows 10] Docker Desktop 설치

2. Kubernetes 설치확인

Settings > Kubernetes 에서 Enable Kubernetes 체크확인 후, 되어 있지 않으면 체크 후 Apply & Restart 한다. 

3. Docker Hub 계정 생성

• https://hub.docker.com/

4. VS Code에 Docker Extension 설치

5. Dockerfile 

# https://hub.docker.com/_/microsoft-dotnet
FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build-env
WORKDIR /app

# copy csproj and restore as distinct layers
COPY *.csproj ./
RUN dotnet restore

# copy everything else and build app
COPY . ./aspnetapp/
RUN dotnet publish -c release -o out

# final stage/image
FROM mcr.microsoft.com/dotnet/aspnet:6.0
WORKDIR /app
COPY --from=build-env /app/out .
ENTRYPOINT ["dotnet", "PlatformService.dll"]

6. Create Image

PS C:\Project\Microservices\PlatformService> docker build -t <docker hub id>/platformservice .
[+] Building 4.7s (15/15) FINISHED
 => [internal] load build definition from Dockerfile                                                                                                                                   0.0s 
 => => transferring dockerfile: 482B                                                                                                                                                   0.0s 
 => [internal] load .dockerignore                                                                                                                                                      0.0s 
 => => transferring context: 2B                                                                                                                                                        0.0s 
 => [internal] load metadata for mcr.microsoft.com/dotnet/aspnet:6.0                                                                                                                   0.1s 
 => [internal] load metadata for mcr.microsoft.com/dotnet/sdk:6.0                                                                                                                      0.1s 
 => [stage-1 1/3] FROM mcr.microsoft.com/dotnet/aspnet:6.0@sha256:211c84ef15e0d2bc77c8d37ea1d936ecf2f4edd11ffd260b11ec9371db63dd3d                                                     0.0s 
 => [build-env 1/6] FROM mcr.microsoft.com/dotnet/sdk:6.0@sha256:d5f9090e564d391c0f00005bc06c74d1f97ccc59d561d3e161d7d3e3acdcd0ca                                                      0.0s 
 => [internal] load build context                                                                                                                                                      0.1s 
 => => transferring context: 9.76kB                                                                                                                                                    0.1s 
 => CACHED [stage-1 2/3] WORKDIR /app                                                                                                                                                  0.0s 
 => CACHED [build-env 2/6] WORKDIR /app                                                                                                                                                0.0s 
 => CACHED [build-env 3/6] COPY *.csproj ./                                                                                                                                            0.0s 
 => CACHED [build-env 4/6] RUN dotnet restore                                                                                                                                          0.0s 
 => [build-env 5/6] COPY . ./                                                                                                                                                          0.1s 
 => [build-env 6/6] RUN dotnet publish -c Release -o out                                                                                                                               4.0s 
 => [stage-1 3/3] COPY --from=build-env /app/out .                                                                                                                                     0.1s 
 => exporting to image                                                                                                                                                                 0.1s 
 => => exporting layers                                                                                                                                                                0.1s 
 => => writing image sha256:006a61c2e93a165e25b7bb12180d5c58d9b38f5b482380e4cd2562e4b1f255d6                                                                                           0.0s 
 => => naming to docker.io/<docker hub id>/platformservice                                                                                                                                    0.0s 

Use 'docker scan' to run Snyk tests against images to find vulnerabilities and learn how to fix them

7. Image 실행

PS C:\Project\Microservices\PlatformService> docker run -p 8080:80 -d <docker hub id>/platformservice

Container로 실행된다. 

PS C:\Project\Microservices\PlatformService> docker ps
CONTAINER ID   IMAGE                      COMMAND                  CREATED         STATUS         PORTS                  NAMES
d53dca9d8644   <docker hub id>/platformservice   "dotnet PlatformServ…"   2 minutes ago   Up 2 minutes   0.0.0.0:8080->80/tcp   clever_visvesvaraya

아래 명령어를 한번 더 실행하면, 별도의 Container가 추가된다. 

PS C:\Project\Microservices\PlatformService> docker run -p 8080:80 -d <docker hub id>/platformservice

8. Docker Hub로 Image Push

PS C:\Project\Microservices\PlatformService> docker login
Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
Username: 
Password:
Login Succeeded

Logging in with your password grants your terminal complete access to your account.
For better security, log in with a limited-privilege personal access token. Learn more at https://docs.docker.com/go/access-tokens/
PS C:\Project\Microservices\PlatformService> docker push <docker hub id>/platformservice 
Using default tag: latest
The push refers to repository [docker.io/<docker hub id>/platformservice]
eeedfe68b540: Pushed
f4d0128f9412: Pushed 
70c482798b89: Pushed
79c360779f60: Pushed
d2557e8ba797: Pushed
5a8a15f6e841: Pushed
ed7b0ef3bf5b: Pushed
latest: digest: sha256:f63587bb8b981167741fdef49e53413237634cb7b966d51f3ccb5fafd4a300da size: 1789