i am trying to connect .Net web API using ocelot gateway. Routing works fine when i run ocelot and API respectively without docker.

With docker desktop (using 4.38.0) it shows 502 in browser with Error connecting to downstream service, exception: System.Net.Http.HttpRequestException: Connection refused (localhost:5001)

My docker compose yaml and Ocelot.json is as below. Both have included port 5001 and same has been exposed from product service's docker file.

I have tried changing ports, exposing them as shown below. Added inbound rule for 5001 with no luck.

TIA, if you can assist on what am i missing / needs change.

docker-compose.yml

services:
  ocelotgateway:
    image: ${DOCKER_REGISTRY-}ocelotgateway
    build:
      context: .
      dockerfile: OcelotGateway/Dockerfile

  productservice:
    image: ${DOCKER_REGISTRY-}productservice
    build:
      context: ProductService
      dockerfile: Dockerfile
    ports:
      - "5001:5001"

Ocelot.json

{
    "Routes": [
        {
            "DownstreamPathTemplate": "/api/products",
            "DownstreamScheme": "http",
            "DownstreamHostAndPorts": [
                {
                    "Host": "localhost",
                    "Port": 5001
                }
            ],
            "UpstreamPathTemplate": "/products",
            "UpstreamHttpMethod": [ "Get" ]
        },
    ]
}

i am trying to connect .Net web API using ocelot gateway. Routing works fine when i run ocelot and API respectively without docker.

With docker desktop (using 4.38.0) it shows 502 in browser with Error connecting to downstream service, exception: System.Net.Http.HttpRequestException: Connection refused (localhost:5001)

My docker compose yaml and Ocelot.json is as below. Both have included port 5001 and same has been exposed from product service's docker file.

I have tried changing ports, exposing them as shown below. Added inbound rule for 5001 with no luck.

TIA, if you can assist on what am i missing / needs change.

docker-compose.yml

services:
  ocelotgateway:
    image: ${DOCKER_REGISTRY-}ocelotgateway
    build:
      context: .
      dockerfile: OcelotGateway/Dockerfile

  productservice:
    image: ${DOCKER_REGISTRY-}productservice
    build:
      context: ProductService
      dockerfile: Dockerfile
    ports:
      - "5001:5001"

Ocelot.json

{
    "Routes": [
        {
            "DownstreamPathTemplate": "/api/products",
            "DownstreamScheme": "http",
            "DownstreamHostAndPorts": [
                {
                    "Host": "localhost",
                    "Port": 5001
                }
            ],
            "UpstreamPathTemplate": "/products",
            "UpstreamHttpMethod": [ "Get" ]
        },
    ]
}

• docker
• ocelot

Share Improve this question Follow edited Mar 9 at 22:54 chint asked Mar 9 at 5:43 chintchint 4511 silver badge88 bronze badges 1

• updated Host with service name within "DownstreamHostAndPorts": [ { "Host": "productservice", "Port": 5001 }" still same issue. – chint Commented Mar 9 at 10:08

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1 Answer 1

Sorted by: Reset to default 0

After below changes, I am able to access individual API and also via ocelot gateway using docker.

- Removed ports definition from docker-compose.yml
- In ocleot.json included service name as host and port as 8080
- Exposed only 8080 as port from API's docker file

Final ocelot.json

{
    "Routes": [
        {
            "DownstreamPathTemplate": "/api/products",
            "DownstreamScheme": "http",
            "DownstreamHostAndPorts": [
                {
                    "Host": "productservice",
                    "Port": 8080
                }
            ],
            "UpstreamPathTemplate": "/products",
            "UpstreamHttpMethod": [ "Get" ]
        },
    ]
}