Gitlab CI Docker and Aspnetcore runtime version issue

Question

I have a aspnet core mvc project put under GitLab, it use DockerFile to containerise docker image. Now I want to utilise GitLab CI feature by having build and test 2 stages.

My plan is build is for docker build command; test is docker pull and run command. I have complete most of the .gitlab.ci.yml code, but I encounter an issue for test stage.

It looks like the gitlab shared runner docker image dotnet cli version is lower than my expected version. Here is the output:

 It was not possible to find any compatible framework version
 The specified framework 'Microsoft.AspNetCore.App', version '2.2.0' was not found.
   - Check application dependencies and target a framework version installed at:
       /usr/share/dotnet/
   - Installing .NET Core prerequisites might help resolve this problem:
       https://go.microsoft.com/fwlink/?LinkID=798306&clcid=0x409
   - The .NET Core framework and SDK can be installed from:
       https://aka.ms/dotnet-download
   - The following versions are installed:
       2.1.15 at [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]

This is my Dockerfile

FROM microsoft/dotnet:2.2-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:aspnetcore-runtime
WORKDIR /app
COPY --from=build-env /app/out .

# override the request to 5000
ENV ASPNETCORE_URLS=http://+:5002 
# override to 5002
EXPOSE 5002 
ENTRYPOINT ["dotnet", "ASPNetApp_2.dll"]

Here is my .gitlab.ci.yml

image: docker:latest

stages:
  - build
  - test

services:
  - docker:dind

variables:
  IMAGE_NAME: ${CI_REGISTRY}/${CI_PROJECT_PATH}

build:
  only:
    - master
    - develop
  before_script:
    - apk update && apk add bash
    - chmod +x ./function.sh
    - . function.sh
    - get_image_tag
    - echo $TAG
    - docker login registry.gitlab.com -u ${CI_REGISTRY_USER} -p ${CI_REGISTRY_PASSWORD}
  script:
    - docker build -t $IMAGE_NAME:$TAG .
    - docker push $IMAGE_NAME:$TAG
  after_script:
    - docker logout ${CI_REGISTRY}
  stage: build
  tags:
    - docker

test:
  stage: test
  before_script:
    - apk update && apk add bash
    - apt-get install aspnetcore-runtime-2.2
    - chmod +x ./function.sh
    - . function.sh
    - get_image_tag
    - echo $TAG
    - docker login registry.gitlab.com -u ${CI_REGISTRY_USER} -p ${CI_REGISTRY_PASSWORD}
  script:
    - docker pull microsoft/dotnet:2.2-aspnetcore-runtime
    - docker pull $IMAGE_NAME:$TAG
    - docker run -p 5002 $IMAGE_NAME:$TAG -it
  after_script:
    - docker logout ${CI_REGISTRY}

function.sh
#!/bin/bash
function get_image_tag(){
  if [ "$CI_COMMIT_REF_SLUG" == "master" ]; then
    export TAG="latest";
  else
    export TAG=$CI_COMMIT_REF_SLUG;
  fi
}

I have been trying sudo apt-get, apt-get, apk add, but no hope, any suggestion?

Does the image work as expected on your local machine? The only thing that comes into my mind is that microsoft/dotnet:aspnetcore-runtime uses a different dotnet version than microsoft/dotnet:2.2-sdk. — RiWe
@RiWe I think I found the answer, you can take a look on my answer below — Kira Hao

Kira Hao Kira Hao · Accepted Answer · 2020-02-11T02:47:37

So I manage to make it work with following configuration.

put image and service into stage section.

build:
 image: docker:latest
 services:
   - docker:dind
...
test:
 image: docker:latest
 services:
   - docker:dind
   - microsoft/dotnet

by doing this, the gitlab ci runner able to pick up latest Microsoft dotnet environment, and it able to make let docker run

Gitlab CI Docker and Aspnetcore runtime version issue

1 Answers