Resolve dns hostname when ipv4/ipv6 hosts are reported by IServerAddressFeature #410

[CarlosLanderas]

What this PR does / why we need it:

Allows resolve dns host when ipv4/ipv6 address formats are reported from IServerAddressFeature.
Formats like : [::], 0.0.0.0

Which issue(s) this PR fixes:

#410

[ignatandrei]

Is this deployed on NUGET ?

[NicolasREY69330]

@CarlosLanderas
same question ?

I opened an issue directly refering to this : #553

[CarlosLanderas]

After talking with a Microsoft member here:
#410

We decided is just easier to setup a dns name. Just configure it to use localhost.

[NicolasREY69330]

@CarlosLanderas

Thank you.
So we are supposed to change the ASPNETCORE_URLS environment variable to localhost ?

Something like this ?

docker-compose.yml

  myservice:
    image: ${DOCKER_REGISTRY-}myservice
    build:
      context: .
      dockerfile: src/myservice/Dockerfile

docker-compose.override.yml

 myservice:
    environment:
      - ASPNETCORE_ENVIRONMENT=Development
      - ASPNETCORE_URLS=https://localhost:443;http://localhost:80 # localhost here ?
    ports:
      - "50708:80"
      - "44345:443"
    volumes:
      - ${APPDATA}/Microsoft/UserSecrets:/root/.microsoft/usersecrets:ro
      - ${APPDATA}/ASP.NET/Https:/root/.aspnet/https:ro    

[CarlosLanderas]

@NicolasREY69330 yes, this should work. However, I don't use to specify the ASPNETCORE_URLS because if you expose 80 and 443 in the DockerFile you just need to specify ports like:

• "80:80"
  or:
• "8080:80"

[xico002]

I had this problem yesterday and tried to add UseUrls(http://localhost). I can see it works if I get the logs of the pod running but if I try to access my .net core application through my custom dns it gives me 502 bad gateway nginx. I´m using an ingress to deploy to kubernetes. Can someone explain to me what am I missing?

Regards

[MaxThom]

Hi, I've been trying so many things to fix this issues. Ultimately, im trying to deploy on Azure WebApp for Linux Container, but for now i cant get it to work even on my local machine. Everything work except this. I tried settings env variable with urls: "http://localhost:80;https://localhost:443", but then even the index break. I tried to set absolute address on health endpoint, but without success. I changed Kestrel UseUrls to localhost, without success.

Any tips ?

[MithrilMan]

@MaxThom I've the same problem, actually my workaround (while developing and testing on docker locally) is to add an environment variable that sets the appsettings HealthChecks Uri

in my docker-compose.override.yml I have

services:
  my-service:
    environment:
      - HealthChecksUI__HealthChecks__0__Uri=http://localhost/healthz

My appsettings.json contains the healtcheck configuration that got overridden by docker-compose environment variable above

"HealthChecksUI": {
      "HealthChecks": [
         {
            "Name": "Core Service",
            "Uri": "/healthz"
         }
      ],
      "EvaluationTimeInSeconds": 10,
      "MinimumSecondsBetweenFailureNotifications": 60
   }