CODEWITHSUNDEEP
c#dockercachingnuget
Echo
Echo

Reputation: 319

How to add host cache directory to docker image when building?

I'm fresher for docker. I had a bad network. Every time building the asp.net core project,it always stuck at dotnet restore step.

Because the project reference abp myget nightly. The error information:

Step 8/9 : RUN dotnet restore "IC.AuthServer.csproj" ---> Running in 4232f5677921 Failed to download package 'Volo.Abp.Core.0.19.0-preview20190724' from 'https://www.myget.org/F/abp-nightly/api/v3/flatcontainer/volo.abp.core/0.19.0-preview20190724/volo.abp.core.0.19.0-preview20190724.nupkg'. The SSL connection could not be established, see inner exception. Unable to read data from the transport connection: Connection reset by peer. Connection reset by peer Failed to download package 'Volo.Abp.IdentityServer.Domain.Shared.0.19.0-preview20190724' from 'https://www.myget.org/F/abp-nightly/api/v3/flatcontainer/volo.abp.identityserver.domain.shared/0.19.0-preview20190724/volo.abp.identityserver.domain.shared.0.19.0-preview20190724.nupkg'. The SSL connection could not be established, see inner exception. Unable to read data from the transport connection: Connection reset by peer.

I had get abp packages at ~/.nuget/. I attempt copy this to docker. but copy not support absolute path. Through I can copy it to current context directory. but it's so ugly .

Is there any way to mount host directory when building image?

Thanks in advance.

Here is Docker-compose.yml:

version: "3"
services:
  db-mysql:
    image: mysql
    ports:
      - "3308:3306"
    volumes:
      - mysql_data:/var/lib/mysql
      - mysql_init_files:/docker-entrypoint-initdb.d
    environment: 
      MYSQL_DATABASE: "Coriander_Account"
      MYSQL_ROOT_PASSWORD: "123456"

  auth-server:
    build:
      context: ./
      dockerfile: Applications/IC.AuthServer.Host/Dockerfile
    depends_on: 
      - db-mysql
    ports: 
      - "6001:80"

volumes: 
  mysql_data:
  dbdata:
  mysql_init_files:

Here is Dockerfile:

FROM mcr.microsoft.com/dotnet/core/aspnet:2.2-stretch-slim AS base
WORKDIR /app
EXPOSE 80

FROM mcr.microsoft.com/dotnet/core/sdk:2.2-stretch AS build
WORKDIR /src
COPY . .
WORKDIR "/src/Applications/IC.AuthServer.Host/"

// * I want to let docker mounting host directory at here. * 

RUN dotnet restore "IC.AuthServer.csproj"
RUN dotnet build "IC.AuthServer.csproj" -c Release -o /app

FROM build AS publish
RUN dotnet publish "IC.AuthServer.csproj" -c Release -o /app

FROM base AS final
WORKDIR /app
COPY --from=publish /app .
ENTRYPOINT ["dotnet", "IC.AuthServer.dll"]

Upvotes: 1

Views: 2045

Answers (1)

Thibaud Ledent
Thibaud Ledent

Reputation: 1912

Is there any way to mount host directory when building image?

Mounting host volumes during build is not possible (see this response). However, you could use multistage builds and "mount" your host directory during a first disk space inefficient stage, and copy just what you need in the final step:

FROM ubuntu as intermediate
COPY myFiles /myFiles
RUN ... # some expensive operation

FROM ubuntu
COPY --from=intermediate /result /result
# simply use the result

Upvotes: 2

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