UPSTREAM: <carry>: add max_housekeeping_interval

OpenShift-Rebase-Source: 3b2555a

Author: rphillips

cmd/kubelet/app/options/globalflags_linux.go

@@ -42,6 +42,7 @@ func addCadvisorFlags(fs *pflag.FlagSet) {
 
 	// e2e node tests rely on this
 	register(global, local, "housekeeping_interval")
+	register(global, local, "max_housekeeping_interval")
 
 	// These flags were implicit from cadvisor, and are mistakes that should be registered deprecated:
 	const deprecated = "This is a cadvisor flag that was mistakenly registered with the Kubelet. Due to legacy concerns, it will follow the standard CLI deprecation timeline before being removed."

pkg/kubelet/cadvisor/cadvisor_linux.go

@@ -61,10 +61,17 @@ const defaultHousekeepingInterval = 10 * time.Second
 const allowDynamicHousekeeping = true
 
 func init() {
+	maxHouseKeeping := maxHousekeepingInterval.String()
+	if value := os.Getenv("OPENSHIFT_MAX_HOUSEKEEPING_INTERVAL_DURATION"); value != "" {
+		klog.Infof("Detected OPENSHIFT_MAX_HOUSEKEEPING_INTERVAL_DURATION: %v", value)
+		maxHouseKeeping = value
+	}
 	// Override cAdvisor flag defaults.
 	flagOverrides := map[string]string{
 		// Override the default cAdvisor housekeeping interval.
 		"housekeeping_interval": defaultHousekeepingInterval.String(),
+		// Override the default max cAdvisor housekeeping interval.
+		"max_housekeeping_interval": maxHouseKeeping,
 		// Disable event storage by default.
 		"event_storage_event_limit": "default=0",
 		"event_storage_age_limit":   "default=0",

pkg/kubelet/kubelet.go

@@ -185,10 +185,6 @@ const (
 	// the cache.
 	runtimeCacheRefreshPeriod = housekeepingPeriod + housekeepingWarningDuration
 
-	// Period for performing eviction monitoring.
-	// ensure this is kept in sync with internal cadvisor housekeeping.
-	evictionMonitoringPeriod = time.Second * 10
-
 	// The path in containers' filesystems where the hosts file is mounted.
 	linuxEtcHostsPath   = "/etc/hosts"
 	windowsEtcHostsPath = "C:\\Windows\\System32\\drivers\\etc\\hosts"
@@ -263,8 +259,21 @@ var (
 
 	// This is exposed for unit tests.
 	goos = sysruntime.GOOS
+
+	// Period for performing eviction monitoring.
+	// ensure this is kept in sync with internal cadvisor housekeeping.
+	evictionMonitoringPeriod = time.Second * 10
 )
 
+func init() {
+	if value := os.Getenv("OPENSHIFT_EVICTION_MONITORING_PERIOD_DURATION"); value != "" {
+		if duration, err := time.ParseDuration(value); err == nil {
+			klog.Infof("Detected OPENSHIFT_EVICTION_MONITORING_PERIOD_DURATION: %v", value)
+			evictionMonitoringPeriod = duration
+		}
+	}
+}
+
 func getContainerEtcHostsPath() string {
 	if goos == "windows" {
 		return windowsEtcHostsPath