spec: hostname: my-app subdomain: default-subdomain hostAliases: - ip: "127.0.0.1" hostnames: - "my-app" The "cannot determine local hostname" error is rarely a critical failure—your app will still start. But in distributed systems, relying on localhost for service registration, logging, or link generation will break cross-service communication.
spring: cloud: inetutils: default-hostname: my-service-01 Or via JVM argument:
-Dspring.cloud.inetutils.default-hostname=my-service-01 Docker Compose Add a hostname entry to your service:
hostname cat /etc/hosts | grep $(hostname) ip addr show If the second command returns nothing, your machine doesn't know its own hostname. Fix 1: Set a Preferred Network Interface (Recommended) Tell Spring Cloud exactly which interface or address to use:
spec: hostname: my-app subdomain: default-subdomain hostAliases: - ip: "127.0.0.1" hostnames: - "my-app" The "cannot determine local hostname" error is rarely a critical failure—your app will still start. But in distributed systems, relying on localhost for service registration, logging, or link generation will break cross-service communication.
spring: cloud: inetutils: default-hostname: my-service-01 Or via JVM argument: relying on localhost for service registration
-Dspring.cloud.inetutils.default-hostname=my-service-01 Docker Compose Add a hostname entry to your service: relying on localhost for service registration
hostname cat /etc/hosts | grep $(hostname) ip addr show If the second command returns nothing, your machine doesn't know its own hostname. Fix 1: Set a Preferred Network Interface (Recommended) Tell Spring Cloud exactly which interface or address to use: relying on localhost for service registration