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In Google Container Engine, when using an L7 ingress, what’s the correct way to auto-scale an instance group based on HTTP load?
When I try to enable auto-scaling for my instance group, I get the warning that I must add the instance group the L7 ingress’ backend service. However, the backend service is already using a k8-ig group, which I cannot enable auto-scaling for.
Autoscaling based on HTTP load is not currently supported through the Ingress. You can of course grow the size of you GKE cluster. Pod autoscaling has been discussed before in the context of https://github.com/kubernetes/kubernetes/issues/18352 and https://github.com/kubernetes/kubernetes/issues/484. Please open an issue on the github repo if you'd like instance autoscaling.