Cannot run Asp.Net Core inside docker linux - asp.net-core

Question

I'm trying to get the ASP.Net Core running inside docker with docker-compose. Here is the dockerfile content:
FROM microsoft/dotnet:2.2-aspnetcore-runtime AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443
FROM microsoft/dotnet:2.2-sdk AS build
WORKDIR /src
COPY ["SchoolContact/SchoolContact.csproj", "SchoolContact/"]
RUN dotnet restore "SchoolContact/SchoolContact.csproj"
COPY . .
WORKDIR "/src/SchoolContact"
RUN dotnet build "SchoolContact.csproj" -c Release -o /app
FROM build AS publish
RUN dotnet publish "SchoolContact.csproj" -c Release -o /app
FROM base AS final
WORKDIR /app
ENV ASPNETCORE_URLS http://+:5000
EXPOSE 5000 80
COPY --from=publish /app .
ENTRYPOINT ["dotnet", "SchoolContact.dll"]
And here is the docker-compose.yml content:
version: '3'
services:
api:
image: schoolcontact
build:
context: .
dockerfile: SchoolContact/Dockerfile
links:
- db:db
ports:
- '5000:5000'
restart: always
networks:
- school
db:
image: mysql:5.7
volumes:
- ./db:/var/lib/mysql
restart: always
environment:
MYSQL_ROOT_PASSWORD: 123456
MYSQL_DATABASE: Test
MYSQL_USER: admin
MYSQL_PASSWORD: 123456
networks:
- school
phpmyadmin:
depends_on:
- db
image: phpmyadmin/phpmyadmin
restart: always
ports:
- '8080:80'
environment:
PMA_HOST: db
MYSQL_ROOT_PASSWORD: 123456
networks:
- school
reverse-proxy:
container_name: proxy
image: nginx
depends_on:
- api
ports:
- "9090:8080"
volumes:
- ./proxy.conf:/etc/nginx/conf.d/default.conf
networks:
- school
networks:
school:
volumes:
db:
driver: "local"
The proxy.conf:
server {
listen 8080;
location / {
proxy_pass http://api:5000;
}
}
I've tried too many times before posting here and ask for help, I tried to run without nginx, expose port or not, so many ways. But I still cannot access the app. My final purpose is to host the app in docker and can access it through URL http://localhost:5000. I don't know where I've wrong or missing something else. I really need help with this. Thanks for reading.

Answer 1

Here is how mine work, after few weeks of researching (for those have the same issue), add these line in the Main method. Also, the dockerfile and docker-compose.yml should look like below:
public static void Main(string[] args)
{
//CreateWebHostBuilder(args).Build().Run();
var host = new WebHostBuilder()
.UseKestrel()
.UseContentRoot(Directory.GetCurrentDirectory())
.UseUrls("http://*:9001")
.UseIISIntegration()
.UseStartup<Startup>()
.Build();
host.Run();
}
docker-compose.yml
services:
api:
image: schoolcontact
build:
context: .
dockerfile: SchoolContact/Dockerfile
links:
- db:db
ports:
- 9021:9001
restart: always
networks:
- school
dockerfile
FROM microsoft/dotnet:2.2-aspnetcore-runtime AS base
WORKDIR /app
EXPOSE 80
#EXPOSE 443
FROM microsoft/dotnet:2.2-sdk AS build
WORKDIR /src
COPY ["SchoolContact/SchoolContact.csproj", "SchoolContact/"]
RUN dotnet restore "SchoolContact/SchoolContact.csproj"
COPY . .
WORKDIR "/src/SchoolContact"
RUN dotnet build "SchoolContact.csproj" -c Release -o /app
FROM build AS publish
RUN dotnet publish "SchoolContact.csproj" -c Release -o /app
FROM base AS final
WORKDIR /app
EXPOSE 9001
COPY --from=publish /app .
ENTRYPOINT ["dotnet", "SchoolContact.dll"]