i have problems setting the ASPNETCORE_ENVIRONMENT variable running my project in a docker container. The problem is that the value is always set/overwritten to "Development".
I have tried setting the environment variable in my Dockerfile using
ENV ASPNETCORE_ENVIRONMENT test
also tried setting the environment variable in my docker-compose file using
environment:
- ASPNETCORE_ENVIRONMENT=test
When I set any other environment variable it works, for example:
environment:
- OTHER_TEST_VARIABLE=test
I assume that the value for ASPNETCORE_ENVIRONMENT variable is overwritten somewhere but I have difficulties finding out where.
I have added Docker support to an existing project and am running the project directly via Visual Studio's Docker/Docker compose option
The project runs on Asp Net Core 2.1
Thanks in advance
My launchSettings.json:
{
"iisSettings": {
"windowsAuthentication": false,
"anonymousAuthentication": true,
"iisExpress": {
"applicationUrl": "http://localhost:53183/",
"sslPort": 0
}
},
"profiles": {
"Docker": {
"commandName": "Docker",
"launchBrowser": true,
"launchUrl": "{Scheme}://localhost:{ServicePort}/api/values"
}
}
}
I also tried adding the environment variable configuration to the launchSettings.json
"Docker": {
"commandName": "Docker",
"launchBrowser": true,
"launchUrl": "{Scheme}://localhost:{ServicePort}/api/values",
"environmentVariables": {
"ASPNETCORE_ENVIRONMENT": "test"
}
}
My Webhost:
public static IWebHost BuildWebHost(string[] args)
{
return WebHost.CreateDefaultBuilder(args)
.ConfigureAppConfiguration((builderContext,config) =>
{
config.AddEnvironmentVariables();
})
.ConfigureLogging((hostingContext, logging) =>
{
logging.AddConfiguration(hostingContext.Configuration.GetSection("Logging"));
logging.AddConsole();
logging.AddDebug();
})
.UseStartup<Startup>()
.Build();
}
My docker-compose.yml
version: '3.4'
services:
api:
image: ${DOCKER_REGISTRY}api
build:
context: .
dockerfile: API/Dockerfile
environment:
- ASPNETCORE_ENVIRONMENT=test
My Dockerfile:
FROM microsoft/dotnet:2.1-aspnetcore-runtime AS base
WORKDIR /app
EXPOSE 80
FROM microsoft/dotnet:2.1-sdk AS build
WORKDIR /src
COPY API/API.csproj API/
RUN dotnet restore API/API.csproj
COPY . .
WORKDIR /src/API
RUN dotnet build API.csproj -c Release -o /app
FROM build AS publish
RUN dotnet publish API.csproj -c Release -o /app
FROM base AS final
WORKDIR /app
COPY --from=publish /app .
ENTRYPOINT ["dotnet", "API.dll"]
Here is a list of the environment variables in the container
C:\Users\Administrator>docker exec -ti d6 /bin/bash
root@d6f26d2ed2c3:/app# printenv
HOSTNAME=d6f26d2ed2c3
ASPNETCORE_URLS=http://+:80
test1=asdasd
test2=dasdasd
test3=dasdasd
PWD=/app
HOME=/root
NUGET_FALLBACK_PACKAGES=/root/.nuget/fallbackpackages
DOTNET_USE_POLLING_FILE_WATCHER=1
ASPNETCORE_VERSION=2.1.3
DOTNET_RUNNING_IN_CONTAINER=true
TERM=xterm
SHLVL=1
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
ASPNETCORE_ENVIRONMENT=Development
_=/usr/bin/printenv
root@d6f26d2ed2c3:/app#
Environment.SetEnvironmentVariableto see if something is invoking it. – Matthew