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Only detecting stale connections for UDP ports in kube-proxy.

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The detectStaleConnections function in kube-proxy is very expensive in
terms of CPU utilization. The results of this function are only actually
used for UDP ports. This adds a protocol attribute to ServicePortName to
make it simple to only run this function for UDP connections. For
clusters with primarily TCP connections this can improve kube-proxy
performance by 2x.
This commit is contained in:
Rob Scott
2019-09-24 17:41:50 -07:00
parent 45f7f70479
commit af56f25797
9 changed files with 781 additions and 654 deletions
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2
pkg/proxy/service.go
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@@ -299,7 +299,7 @@ func (sct *ServiceChangeTracker) serviceToServiceMap(service *v1.Service) Servic
serviceMap := make(ServiceMap)
for i := range service.Spec.Ports {
servicePort := &service.Spec.Ports[i]
svcPortName := ServicePortName{NamespacedName: svcName, Port: servicePort.Name}
svcPortName := ServicePortName{NamespacedName: svcName, Port: servicePort.Name, Protocol: servicePort.Protocol}
baseSvcInfo := sct.newBaseServiceInfo(servicePort, service)
if sct.makeServiceInfo != nil {
serviceMap[svcPortName] = sct.makeServiceInfo(servicePort, service, baseSvcInfo)