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Merge pull request #41223 from freehan/kube-proxy-skip

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Automatic merge from submit-queue (batch tested with PRs 41223, 40892, 41220, 41207, 41242)

skip iptables sync if no endpoint changes

Alternative to https://github.com/kubernetes/kubernetes/pull/41173
fixes: #26637
No need to checksum. Just compare endpoint maps.
This commit is contained in:
Kubernetes Submit Queue 2017-02-10 13:35:40 -08:00 committed by GitHub
commit fad940867c
1 changed files with 15 additions and 8 deletions
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23
pkg/proxy/iptables/proxier.go
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@ -591,6 +591,7 @@ func (proxier *Proxier) OnEndpointsUpdate(allEndpoints []api.Endpoints) {
activeEndpoints := make(map[proxy.ServicePortName]bool) // use a map as a set
staleConnections := make(map[endpointServicePair]bool)
svcPortToInfoMap := make(map[proxy.ServicePortName][]hostPortInfo)
newEndpointsMap := make(map[proxy.ServicePortName][]*endpointsInfo)
// Update endpoints for services.
for i := range allEndpoints {
@ -627,32 +628,38 @@ func (proxier *Proxier) OnEndpointsUpdate(allEndpoints []api.Endpoints) {
// Flatten the list of current endpoint infos to just a list of ips as strings
curEndpointIPs := flattenEndpointsInfo(curEndpoints)
if len(curEndpointIPs) != len(newEndpoints) || !slicesEquiv(slice.CopyStrings(curEndpointIPs), newEndpoints) {
glog.V(3).Infof("Setting endpoints for %q to %+v", svcPort, newEndpoints)
// Gather stale connections to removed endpoints
removedEndpoints := getRemovedEndpoints(curEndpointIPs, newEndpoints)
for _, ep := range removedEndpoints {
staleConnections[endpointServicePair{endpoint: ep, servicePortName: svcPort}] = true
}
glog.V(3).Infof("Setting endpoints for %q to %+v", svcPort, newEndpoints)
// Once the set operations using the list of ips are complete, build the list of endpoint infos
proxier.endpointsMap[svcPort] = proxier.buildEndpointInfoList(portsToEndpoints[portname], newEndpoints)
}
// Once the set operations using the list of ips are complete, build the list of endpoint infos
newEndpointsMap[svcPort] = proxier.buildEndpointInfoList(portsToEndpoints[portname], newEndpoints)
activeEndpoints[svcPort] = true
}
}
// Remove endpoints missing from the update.
// Check stale connections against endpoints missing from the update.
for svcPort := range proxier.endpointsMap {
if !activeEndpoints[svcPort] {
glog.V(2).Infof("Removing endpoints for %q", svcPort)
// record endpoints of unactive service to stale connections
for _, ep := range proxier.endpointsMap[svcPort] {
staleConnections[endpointServicePair{endpoint: ep.ip, servicePortName: svcPort}] = true
}
glog.V(2).Infof("Removing endpoints for %q", svcPort)
delete(proxier.endpointsMap, svcPort)
}
proxier.updateHealthCheckEntries(svcPort.NamespacedName, svcPortToInfoMap[svcPort])
}
proxier.syncProxyRules()
if len(newEndpointsMap) != len(proxier.endpointsMap) || !reflect.DeepEqual(newEndpointsMap, proxier.endpointsMap) {
proxier.endpointsMap = newEndpointsMap
proxier.syncProxyRules()
} else {
glog.V(4).Infof("Skipping proxy iptables rule sync on endpoint update because nothing changed")
}
proxier.deleteEndpointConnections(staleConnections)
}