问题
Using nginx nginx-ingress-controller:0.9.0, below is the permanent state of the google cloud load balancer :
Basically, the single healthy node is the one running the nginx-ingress-controller pods. Besides not looking good on this screen, everything works super fine. Thing is, Im' wondering why such bad notice appears on the lb
Here's the service/deployment used
Am just getting a little lost over how thing works; hope to get some experienced feedback on how to do thing right (I mean, getting green lights on all nodes), or to double check if that's a drawback of not using the 'official' gcloud l7 thing
回答1:
Your Service is using the service.beta.kubernetes.io/external-traffic: OnlyLocal annotation. This configures it so that traffic arriving at the NodePort for that service will never go a Pod on another node. Since your Deployment only has 1 replica, the only node that will receive traffic is the one where the 1 Pod is running.
If you scale your Deployment to 2 replicas, 2 nodes will be healthy, etc.
Using that annotation is a recommend configuration so that you are not introducing additional network hops.
来源：https://stackoverflow.com/questions/47955064/gke-nginx-lb-health-checks-cant-get-all-instances-in-a-healthy-state