CODEWITHSUNDEEP
mongodbdockerasp.net-core
Mai
Mai

Reputation: 131

Asp.net core webapi connection error to mongo docker image when adding a docker file

I developed a simple dotnet core api that connects to mongo docker image. The application works perfectly with the following uri (mongodb://localhost:27017) : mongo connection string

{
  "MongoDB": {
    "Database": "messagesdb",
    "Host": "localhost",
    "Port": 27017,
    "User": "",
    "Password": ""
  },
  "Logging": {
    "LogLevel": {
      "Default": "Warning"
    }
  },
  "AllowedHosts": "*"
}

the JSON response Json Response after a successful run

But When I add a docker file via visual studio, and setting the host in the settings.json file to mongo instead of localhost, as the picture shows (mongodb://mongo:27017): mongo connection string

The Docker file :

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 ["ErrorMessagesAPI.csproj", ""]
RUN dotnet restore "./ErrorMessagesAPI.csproj"
COPY . .
WORKDIR "/src/."
RUN dotnet build "ErrorMessagesAPI.csproj" -c Release -o /app/build

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

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

The docker-compose for mongo :

version: '3.8'

services:

  mongo:
      image: mongo
      container_name: mongo
      restart: always
      ports:
        - "27017:27017"
      volumes:
        - mongo-data:/data/db
  mongo-express:
      image: mongo-express
      container_name: mongo-express
      restart: always
      ports:
        - "8081:8081"
      depends_on:
        - mongo  
volumes:
  mongo-data:
    driver: local

The API doesn't work as the following picture depicts: docker run result, and the complete code can be found here MessageAPI

I am following the article found here Docker + MongoDB + .NET Core = a good tim Can anyone help with this?

Upvotes: 0

Views: 1497

Answers (1)

Mai
Mai

Reputation: 131

I want to share my solution for this problem, so you can benefit from your turn. to link to the mongo image, you should update the docker-compose file, and leave the settings as-is. providing an environmental variable in the docker-compose will re-write the settings in the settings.json file, as the following:

version: '3.1'
services:
mongo:
    image: mongo
    restart: always
    ports:
      - 27017:27017
mongo-express:
    image: mongo-express
    restart: always
    ports:
      - 8081:8081
    depends_on:
      - mongo
todo-server:
    build: .
    restart: always
    ports:
      - 5000:80
    environment:
      MongoDB__Host: mongo
    depends_on:
      - mongo

Upvotes: 2

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