Hi @lucamoroldo, could you check if host.docker.internal can be resolved to an IP address in your WSL2 environment?

$ host host.docker.internal
host.docker.internal has address 127.0.0.1

That hostname should be configured automatically when installing Docker Desktop. And it should result in the following configuration in the /etc/hosts file within your WSL2 environment.

127.0.0.1    host.docker.internal

If it's not there, could you try adding that manually (vim /etc/hosts) and then try again running Edge Service?

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Since there hasn't been any activity in the past few months, I'm closing this issue, but feel free to open a new one should you still have some issues about the network setup. Thanks!

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@lucamoroldo Have you solved that problem? I met the same problem too. Anyone could help me?

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Solution:

Environment

Steps

1. You should add host.docker.internal to /etc/hosts. Your /etc/hosts file on your host machine should looks like this:

   
   127.0.0.1  localhost  host.docker.internal
   

   rather than this:

   
   127.0.0.1 localhost
   127.0.0.1 host.docker.internal
   

2. Add host.docker.internal to no_proxy and NO_PROXY environment varaible (~/.bashrc or ~/.zshrc on host machine).
3. Add host.docker.internal to proxy Exceptions in your host Chrome browser. It should look like host.docker.internal,*.yahoo.com
4. Your final docker-compose.yml file should look like this (Note the addition of host.docker.internal:host-gateway in the extra_hosts section for both catalog_service and edge-service):
   docker-compose.yml

   
   version: '3.8'
   services:
     catalog-service:
       depends_on:
         - fluent-bit
         - polar-keycloak
         - polar-postgres
         - tempo
       image: catalog-service
       container_name: catalog-service
       ports:
         - '9001:9001'
         - '8001:8001'
       environment:
         - BPL_JVM_THREAD_COUNT=50
         - BPL_DEBUG_ENABLED=true
         - BPL_DEBUG_PORT=8001
         - >-
           JAVA_TOOL_OPTIONS=-javaagent:/workspace/BOOT-INF/lib/opentelemetry-javaagent-1.32.0.jar
         - OTEL_SERVICE_NAME=catalog-service
         - 'OTEL_EXPORTER_OTLP_ENDPOINT=http://tempo:4317'
         - OTEL_METRICS_EXPORTER=none
         - 'SPRING_CLOUD_CONFIG_URI=http://config-service:8888'
         - >-
           SPRING_DATASOURCE_URL=jdbc:postgresql://polar-postgres:5432/polardb_catalog
         - SPRING_PROFILES_ACTIVE=testdata
         - >-
           SPRING_SECURITY_OAUTH2_RESOURCESERVER_JWT_ISSUER_URI=http://host.docker.internal:8080/realms/PolarBookshop
       extra_hosts:
         - 'host.docker.internal:host-gateway'
       logging:
         driver: fluentd
         options:
           fluentd-address: '127.0.0.1:24224'
     edge-service:
       depends_on:
         - fluent-bit
         - polar-keycloak
         - polar-redis
         - polar-ui
         - tempo
       image: edge-service
       container_name: edge-service
       ports:
         - '9000:9000'
         - '8000:8000'
       environment:
         - BPL_DEBUG_ENABLED=true
         - BPL_DEBUG_PORT=8000
         - 'CATALOG_SERVICE_URL=http://catalog-service:9001'
         - >-
           JAVA_TOOL_OPTIONS=-javaagent:/workspace/BOOT-INF/lib/opentelemetry-javaagent-1.32.0.jar
         - OTEL_SERVICE_NAME=edge-service
         - 'OTEL_EXPORTER_OTLP_ENDPOINT=http://tempo:4317'
         - OTEL_METRICS_EXPORTER=none
         - 'ORDER_SERVICE_URL=http://order-service:9002'
         - 'SPA_URL=http://polar-ui:9004'
         - 'SPRING_CLOUD_CONFIG_URI=http://config-service:8888'
         - SPRING_REDIS_HOST=polar-redis
         - >-
           SPRING_SECURITY_OAUTH2_CLIENT_PROVIDER_KEYCLOAK_ISSUER_URI=http://host.docker.internal:8080/realms/PolarBookshop
       extra_hosts:
         - 'host.docker.internal:host-gateway'
       logging:
         driver: fluentd
         options:
           fluentd-address: '127.0.0.1:24224'
     polar-keycloak:
       image: 'quay.io/keycloak/keycloak:23.0'
       container_name: polar-keycloak
       command: start-dev --import-realm
       volumes:
         - './keycloak:/opt/keycloak/data/import'
       environment:
         - KEYCLOAK_ADMIN=user
         - KEYCLOAK_ADMIN_PASSWORD=password
       ports:
         - '8080:8080'
   

In the end

• I believe the setting SPRING_SECURITY_OAUTH2_CLIENT_PROVIDER_KEYCLOAK_ISSUER_URI=http://host.docker.internal:8080/realms/PolarBookshop is passed from the back-end Spring Boot application to the front-end. This will prompt the browser to redirect to http://host.docker.internal:8080/realms/PolarBookshop when you click the login button on the webpage. Is it right?

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