kubectl port forwarding timeout issue
Setting kube's streaming-connection-idle-timeout
to 0 should be a right solution, but if you don't want to change anything, you can use while-do construction
Format: while true; do <<YOUR COMMAND HERE>>; done
So just inputing in CLI: while true; do kubectl --namespace somenamespace port-forward somepodname 50051:50051; done
should keep kubectl reconnecting on connection lost
Seems there is a 5 minute timeout that can be overridden with kubelet
parameters:
https://github.com/kubernetes/kubernetes/issues/19231
If you want to pass something higher than 5 minutes (or unlimited) into your kubelets, you can specify the
streaming-connection-idle-timeout
. E.g.--streaming-connection-idle-timeout=4h
to set it to 4 hours. Or:--streaming-connection-idle-timeout=0
to make it unlimited. (DEPRECATED: This parameter should be set via the config file specified by the Kubelet's --config flag. See https://kubernetes.io/docs/tasks/administer-cluster/kubelet-config-file/ for more information.)
I solved this by keeping the connection alive, e.g. using curl or nc.
Forward the port:
kubectl --namespace somenamespace port-forward somepodname 50051:50051
In another terminal, keep the connection alive by reaching out to the port every 10 seconds:
while true ; do nc -vz 127.0.0.1 50051 ; sleep 10 ; done