I'm trying to expose a service with Google Container Engine using the following command:
kubectl expose rc image-server --create-external-load-balancer=true
This fails to create the load balancer with the following output from 'kubectl describe services':
"Error creating load balancer (will retry): Failed to create load balancer for service default/image-server: failed to create target pool a06ecdc229dce11e5a90f42010af0004: googleapi: Error 400: Invalid value for: None is not a valid value, invalid"
Does anyone know why it's failing to create the target pool and/or what the "Invalid value for: None is not a valid value, invalid" error message might be referring to?
So it seems like it's a Kubernetes issue (related GitHub issue) of which they are aware, the problem has been fixed here
Apparently the work around is adding the following, in your load balancer service's config until the fix makes it into a release:
sessionAffinity: "ClientIP"
Edit: Tried this out and can confirm it works
Update: The incident is over and creating external load balancers should again work as expected.
This is caused by https://status.cloud.google.com/incident/compute/15065.
The incident status also links to a gist that shows the workarounds when using a service yaml file or kubectl expose.