I try to make docker image, but when I run cmd in terminal.
sudo docker build testapi .
I get an error:
=> ERROR [6/6] RUN go build -o /app/testapi/cmd/test-api 0.3s
------
> [6/6] RUN go build -o /app/testapi/cmd/test-api:
#14 0.231 no Go files in /app
------
executor failed running [/bin/sh -c go build -o /app/testapi/cmd/test-api]: exit code: 1
File structure
/testapi
/cmd
/test-api
maing.go
/pkg
/...
Dockerfile
Dockerfile:
FROM golang:1.16-alpine
WORKDIR /app
COPY go.mod ./
RUN go mod download
COPY . ./
RUN go build -o /app/testapi/cmd/test-api
EXPOSE 8080
CMD [ "/testapi/cmd/test-api" ]
Try this way.
Also do not forget to add go.sum in Dockerfile if you have. COPY go.sum .
FROM golang:1.16-alpine
WORKDIR /app
COPY go.mod .
COPY . .
RUN go build -o main ./cmd/<FOLDER_NAME>
WORKDIR /dist
RUN cp /app/main .
EXPOSE 3000
CMD ["/dist/main"]
Works fine
Status: Downloaded newer image for golang:1.16-alpine
---> 7642119cd161
Step 2/9 : WORKDIR /app
---> Running in f8ad2994262c
Removing intermediate container f8ad2994262c
---> 6e079707cc3e
Step 3/9 : COPY go.mod .
---> c79a0cc04ff5
Step 4/9 : COPY . .
---> 897027112e73
Step 5/9 : RUN go build -o main ./cmd/api
---> Running in eb4579f1c339
Removing intermediate container eb4579f1c339
---> e41f6e5542a4
Step 6/9 : WORKDIR /dist
---> Running in 92115865d1ec
Removing intermediate container 92115865d1ec
---> 8152a0ebe4bc
Step 7/9 : RUN cp /app/main .
---> Running in 5c68cb195826
Removing intermediate container 5c68cb195826
---> 6f2e1fb8a611
Step 8/9 : EXPOSE 3000
---> Running in fba77820c1ec
Removing intermediate container fba77820c1ec
---> 182a624d807a
Step 9/9 : CMD ["/dist/main"]
---> Running in 164ba25694bd
Removing intermediate container 164ba25694bd
---> 7cf22cffc472
Successfully built 7cf22cffc472
Successfully tagged bla:latest
go build [-o output] [build flags] [packages]
I have a VS 2019 Solution with 2 projects: P1 (Standard lib) & P2 (ASP.NET Core exe).
P2 contains a Dockerfile.
I have copied the Docker file to up folder, tried to build the docker running the cmd :
>docker build -f Dockerfile ..
Sending build context to Docker daemon 3.056GB
Step 1/18 : FROM mcr.microsoft.com/dotnet/core/aspnet:3.1-buster-slim AS base
---> 5d7a95ed1660
Step 2/18 : WORKDIR /app
---> Using cache
---> 6e8271ae3df9
Step 3/18 : EXPOSE 80
---> Using cache
---> e45066aa184b
Step 4/18 : EXPOSE 443
---> Using cache
---> 0bbce5ed4c30
Step 5/18 : FROM mcr.microsoft.com/dotnet/core/sdk:3.1-buster AS build
---> 925a86b607a3
Step 6/18 : WORKDIR /src
---> Using cache
---> e4af901c8e34
Step 7/18 : COPY ["PropMan/PropMan.csproj", "PropMan/"]
COPY failed: stat /var/lib/docker/tmp/docker-builder808977273/PropMan/PropMan.csproj: no such file or directory
How to fix it?
The directory structure
-Solution dir
--ChartJs.Blazor project
---ChartJs.Blazor.csproj
---ChartJs.Blazor files
--PropMan project
---PropMan.csproj
---PropMan files
---Dockerfie (it was created here but later I moved it to solution folder)
-Dockerfie
The Dockerfile
FROM mcr.microsoft.com/dotnet/core/aspnet:3.1-buster-slim AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443
FROM mcr.microsoft.com/dotnet/core/sdk:3.1-buster AS build
WORKDIR /src
COPY ["PropMan/PropMan.csproj", "PropMan/"]
COPY ["ChartJs.Blazor/ChartJs.Blazor.csproj", "ChartJs.Blazor/"]
RUN dotnet restore "PropMan/PropMan.csproj"
COPY . .
WORKDIR "/src/PropMan"
RUN dotnet build "PropMan.csproj" -c Release -o /app/build
FROM build AS publish
RUN dotnet publish "PropMan.csproj" -c Release -o /app/publish
FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "PropMan.dll"]
I need to go to the solution folder and run
docker build -f PropMan/Dockerfile .
The Dockefile is in project folder.
I have a vanilla .NET Core 2 web app that I setup in JetBrains Rider and I immediately started working on a Docker environment for it. I followed this guide to get started:
https://docs.docker.com/engine/examples/dotnetcore/
I altered it slightly to come up with this:
FROM microsoft/dotnet:latest AS packager
RUN mkdir -p /opt/build
WORKDIR /opt/build
# Copy csproj and restore as distinct layers
COPY *.csproj .
RUN dotnet restore
# Copy everything else and build
COPY . .
RUN dotnet publish -c Release -o bin
# --
# Build runtime image
FROM microsoft/dotnet:runtime AS runtime
RUN mkdir -p /opt/app
WORKDIR /opt/app
COPY --from=packager /opt/build/bin/. .
ENTRYPOINT ["dotnet", "/opt/app/aspnetapp.dll"]
The image builds and when I go to run the container I get the following output:
dan#mycomputer ~/Desktop/coreapi (master)
$ docker build -t myapp .
Sending build context to Docker daemon 25.09kB
Step 1/12 : FROM microsoft/dotnet:latest AS packager
---> e1a56dca783e
Step 2/12 : RUN mkdir -p /opt/build
---> Using cache
---> 95f9c936d0d1
Step 3/12 : WORKDIR /opt/build
---> Using cache
---> 64f26c356fd7
Step 4/12 : COPY *.csproj .
---> Using cache
---> 38a2fb7ca6bb
Step 5/12 : RUN dotnet restore
---> Using cache
---> 70dbc44d98ae
Step 6/12 : COPY . .
---> Using cache
---> b1019d53a861
Step 7/12 : RUN dotnet publish -c Release -o bin
---> Using cache
---> 8e112606633a
Step 8/12 : FROM microsoft/dotnet:runtime AS runtime
---> cc240a7fd027
Step 9/12 : RUN mkdir -p /opt/app
---> Using cache
---> 954f494febc4
Step 10/12 : WORKDIR /opt/app
---> Using cache
---> b74be941e7dc
Step 11/12 : COPY --from=packager /opt/build/bin/. .
---> Using cache
---> 4c229192d99b
Step 12/12 : ENTRYPOINT ["dotnet", "/opt/app/aspnetapp.dll"]
---> Using cache
---> fb6ef4015fba
Successfully built fb6ef4015fba
Successfully tagged myapp:latest
SECURITY WARNING: You are building a Docker image from Windows against a non-Windows Docker host. All files and directories added to build context will have '-rwxr-xr-x' permissions. It is recommended to double check and reset permissions for sensitive files and directories.
dan#mycomputer ~/Desktop/coreapi (master)
$ docker run -p 5001:5001 myapp:latest
Did you mean to run dotnet SDK commands? Please install dotnet SDK from:
http://go.microsoft.com/fwlink/?LinkID=798306&clcid=0x409
The app doesn't run and I get a message that says I need to install the SDK. What's up with that? Shouldn't the runtime Docker image have everything neede to run the app?
I was able to find the solution by modifying the ENTRYPOINT to run tail -f /dev/null. From there, I entered the container and saw that the name of the binary adjusts based on your project name which the Docker documentation didn't make clear to me.
I also updated my base images and this solved my problem. Here is my latest Dockerfile below:
FROM microsoft/dotnet:2.1-sdk AS packager
RUN mkdir -p /opt/build
WORKDIR /opt/build
# Copy csproj and restore as distinct layers
COPY *.csproj .
RUN dotnet restore
# Copy everything else and build
COPY . .
RUN dotnet publish -c Release -o bin
# --
# Build runtime image
FROM microsoft/dotnet:2.1-aspnetcore-runtime AS runtime
RUN mkdir -p /opt/app
WORKDIR /opt/app
COPY --from=packager /opt/build/bin/. .
EXPOSE 80
ENTRYPOINT ["dotnet", "/opt/app/coreapi.dll"]
Trying to follow the tutorial found here, but running into problems.
I run the following command from my project dir:
docker build -t my.solution .
I get the following:
Sending build context to Docker daemon 111.6kB
Step 1/17 : FROM microsoft/aspnetcore:2.0-nanoserver-1709 AS base
---> ccfb41c8f5b5
Step 2/17 : WORKDIR /app
---> Using cache
---> e29a68e16001
Step 3/17 : EXPOSE 80
---> Using cache
---> 976388139964
Step 4/17 : FROM microsoft/aspnetcore-build:2.0-nanoserver-1709 AS build
---> d7ab4e860769
Step 5/17 : WORKDIR /src
---> Using cache
---> 4ab01220723e
Step 6/17 : COPY my.solution.sln ./
COPY failed: CreateFile \\?\C:\ProgramData\Docker\tmp\docker-builder564035917\my.solution.sln: The system cannot find the file specified.
I don't know why it's trying to find the file in the location it's looking for it. Can anyone help me? Is there a config setting I need to make? My Docker file looks like this:
FROM microsoft/aspnetcore:2.0-nanoserver-1709 AS base
WORKDIR /app
EXPOSE 80
FROM microsoft/aspnetcore-build:2.0-nanoserver-1709 AS build
WORKDIR /src
COPY my.solution.sln ./
COPY my.solution/my.solution.csproj my.solution/
RUN dotnet restore -nowarn:msb3202,nu1503
COPY . .
WORKDIR /src/my.solution
RUN dotnet build -c Release -o /app
FROM build AS publish
RUN dotnet publish -c Release -o /app
FROM base AS final
WORKDIR /app
COPY --from=publish /app .
ENTRYPOINT ["dotnet", "my.solution.dll"]
UPDATE
Per #AlexGera's answer, I tried changing my docker file to:
FROM microsoft/aspnetcore:2.0-nanoserver-1709 AS base
WORKDIR /app
EXPOSE 80
FROM microsoft/aspnetcore-build:2.0-nanoserver-1709 AS build
WORKDIR /src
VOLUME C:/tmp
COPY my.solution.sln c:/tmp/
COPY my.solution/my.solution.csproj my.solution/
RUN dotnet restore -nowarn:msb3202,nu1503
COPY . .
WORKDIR /src/my.solution
RUN dotnet build -c Release -o /app
FROM build AS publish
RUN dotnet publish -c Release -o /app
FROM base AS final
WORKDIR /app
COPY --from=publish /app .
ENTRYPOINT ["dotnet", "my.solution.dll"]
but the error message doesn't change significantly:
docker build -t my.solution .
Sending build context to Docker daemon 111.6kB
Step 1/18 : FROM microsoft/aspnetcore:2.0-nanoserver-1709 AS base
---> ccfb41c8f5b5
Step 2/18 : WORKDIR /app
---> Using cache
---> e29a68e16001
Step 3/18 : EXPOSE 80
---> Using cache
---> 976388139964
Step 4/18 : FROM microsoft/aspnetcore-build:2.0-nanoserver-1709 AS build
---> d7ab4e860769
Step 5/18 : WORKDIR /src
Removing intermediate container 31e30e2346aa
---> 61c7df20f3c4
Step 6/18 : VOLUME C:/tmp
---> Running in fada6c728151
Removing intermediate container fada6c728151
---> 7a650440cc1f
Step 7/18 : COPY my.solution.sln c:/tmp/
COPY failed: CreateFile \\?\C:\ProgramData\Docker\tmp\docker-builder832533802\my.solution.sln: The system cannot find the file specified.
Seems to me the standard Dockerfile that comes with a new solution is bugged :/
I moved the Dockerfile up to the solution folder, from PowerShell:
mv Dockerfile ../Dockerfile
Running the docker build command from there did the trick for me...
The COPY command will copy the file from the build context, or a previous build stage if you specify the stage. With your build command:
docker build -t my.solution .
The context is . which is first sent to the docker engine which places that in a temporary location just for the build.
Therefore with your copy command:
Step 6/17 : COPY my.solution.sln ./
The file my.solution.sln needs to exist in the folder where the build command was run.
For the destination, the file will be copied to the working directory inside the container, or /src in your example.
This was probably caused by the .dockerignore file next to you DockerFile, ignoring everything but /obj/*.
Once you copied it to another folder you didn't copy the .dockerignore file, so nothing was excluded and it worked.
Before copying add a volume in your image to copy where to.
Something like this:
VOLUME C:/Users/mysolution
COPY my.solution.sln C:/Users/mysolution
Try not to use dots for directory names.
I found that same situation in a VS2017 Solution where the build is started by docker compose and yml files one directory above the project.
If you want to build by docker build with the docker file directly, you need to move the docker file one level above the context
Use the \\
FROM microsoft\\aspnetcore-build:2.0-nanoserver-1709 AS build
see the below example
FROM microsoft/aspnetcore:2
WORKDIR /app
EXPOSE 80
COPY bin\\Debug\\netcoreapp2.0 .
ENTRYPOINT ["dotnet","DOCKER-API.dll"]
I move my Dockerfile to the root folder (where exists .sln and .dockerignore files) and my problem was resolved
Perfect suits for who uses visual studio :
run this command :
docker build -t . your_application_name/Dockerfile
Dockerfile Copy path :
["your_application_name/your_application_name.csproj","your_application_name/"]
we run the build command docker build command it is unable to find the dockerfile in the project path location.
Visual Studio creates the Docker file at Project level, however, the Dockerfile is tailored to be run from an upper level (Solution level).
The easiest way to fix this problem is to go one level up (Solution folder), and specify the project folder:
docker build --tag tagone -f Project/Dockerfile .
I'm trying to set up my dotnet core app to run through docker on my mac. My Dockerfile looks like this:
FROM microsoft/dotnet:sdk 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/dotnet:runtime
WORKDIR /app
COPY --from=build-env /app/out ./
ENTRYPOINT ["dotnet", "backend.dll"]
When I run: docker build -t backend .
I get :
Sending build context to Docker daemon 1.133MB
Step 1/10 : FROM microsoft/dotnet:sdk AS build-env
---> 76d532b4a0ca
Step 2/10 : WORKDIR /app
---> Using cache
---> 9c04cc3784c1
Step 3/10 : COPY *.csproj ./
---> Using cache
---> 18b53c11abd6
Step 4/10 : RUN dotnet restore
---> Running in 46f3843faad7
Aborted
The command '/bin/sh -c dotnet restore' returned a non-zero code: 134
I did some debugging and noticed when I ran any command of dotnet it bombs. I ran dotnet --info and it showed the information but also Aborted. Any suggestions would be greatly appreciated.