Eureka never unregisters a service
I realized that self preservation mode was never actually being disabled. It turns out the actual property is
eureka.server.enableSelfPreservation=false
(See DefaultEurekaServerConfig Code), which I haven't found documented anywhere. This resolved my issue.
I made service de-registration work by setting the below values
Eureka server application.yml
eureka:
server:
enableSelfPreservation: false
Service application.yml
eureka:
instance:
leaseRenewalIntervalInSeconds: 1
leaseExpirationDurationInSeconds: 2
The full example is here https://github.com/ExampleDriven/spring-cloud-eureka-example