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Discussion on: Keycloak Express Openid-client

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Replies for: Hey, Austin! Thank you so much for your article, I was able to make it work locally with it! :D However, I'm facing some issues to run my applicat...

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austincunningham profile image
Austin Cunningham • • Edited

Thanks for taking the time to try this out in a docker container. So the issue is this line github.com/austincunningham/keyclo... where the localhost is the localhost inside the container and has no visibility on the global localhost (if that makes sense). Some solutions here how-to-connect-to-localhost-within... , I tried

ip addr show docker0
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to get the ip address and use that instead of localhost in the code and rebuilt the container

const keycloakIssuer = await Issuer.discover('http://172.17.0.1:8080/realms/keycloak-express')
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Looks to be working

docker run -p 3000:3000 quay.io/austincunningham/keycloak-express-openid-client:latest
Discovered issuer http://172.17.0.1:8080/realms/keycloak-express {
  claim_types_supported: [ 'normal' ],
  claims_parameter_supported: true,
  grant_types_supported: [
    'authorization_code',
    'implicit',
    'refresh_token',
    'password',
    'client_credentials',
    'urn:ietf:params:oauth:grant-type:device_code',
    'urn:openid:params:grant-type:ciba'
  ],...
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Austin Cunningham •

There has to be a better way to get the docker0 ip address. This will get it

ifconfig | awk '/docker0/{getline; print}' | awk '{ print $2 }'
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You can then create an environment variable

export DOCKERHOST=$(ifconfig | awk '/docker0/{getline; print}' | awk '{ print $2 }')
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Change the issuer to use the environment variable

const keycloakIssuer = await Issuer.discover("http://"+ process.env.DOCKERHOST +":8080/realms/keycloak-express")
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Can pass it in on docker run

docker run -p 3000:3000 -e DOCKERHOST=$DOCKERHOST quay.io/austincunningham/keycloak-express-openid-client:latest
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For docker compose you can use a env file to pass in environment variables

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Tatiana Vitorello •

Hey, Austin! Sorry for taking so long to reply, but I wanted to thank you for your help! It really helped me and worked like a charm! :)