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Merge pull request #119500 from JackTroy/fix-threshold-arg

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Add explanation for large-cluster-size-threshold arg
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Kubernetes Prow Robot 2023-10-30 02:50:10 +01:00 committed by GitHub
commit 74098ab5ad
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2 changed files with 2 additions and 2 deletions
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2
cmd/kube-controller-manager/app/options/nodelifecyclecontroller.go
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@ -44,7 +44,7 @@ func (o *NodeLifecycleControllerOptions) AddFlags(fs *pflag.FlagSet) {
"where N means number of retries allowed for kubelet to post node status.")
fs.Float32Var(&o.NodeEvictionRate, "node-eviction-rate", 0.1, "Number of nodes per second on which pods are deleted in case of node failure when a zone is healthy (see --unhealthy-zone-threshold for definition of healthy/unhealthy). Zone refers to entire cluster in non-multizone clusters.")
fs.Float32Var(&o.SecondaryNodeEvictionRate, "secondary-node-eviction-rate", 0.01, "Number of nodes per second on which pods are deleted in case of node failure when a zone is unhealthy (see --unhealthy-zone-threshold for definition of healthy/unhealthy). Zone refers to entire cluster in non-multizone clusters. This value is implicitly overridden to 0 if the cluster size is smaller than --large-cluster-size-threshold.")
fs.Int32Var(&o.LargeClusterSizeThreshold, "large-cluster-size-threshold", 50, fmt.Sprintf("Number of nodes from which %s treats the cluster as large for the eviction logic purposes. --secondary-node-eviction-rate is implicitly overridden to 0 for clusters this size or smaller.", names.NodeLifecycleController))
fs.Int32Var(&o.LargeClusterSizeThreshold, "large-cluster-size-threshold", 50, fmt.Sprintf("Number of nodes from which %s treats the cluster as large for the eviction logic purposes. --secondary-node-eviction-rate is implicitly overridden to 0 for clusters this size or smaller. Notice: If nodes reside in multiple zones, this threshold will be considered as zone node size threshold for each zone to determine node eviction rate independently.", names.NodeLifecycleController))
fs.Float32Var(&o.UnhealthyZoneThreshold, "unhealthy-zone-threshold", 0.55, "Fraction of Nodes in a zone which needs to be not Ready (minimum 3) for zone to be treated as unhealthy. ")
}

2
pkg/controller/nodelifecycle/node_lifecycle_controller.go
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@ -1202,7 +1202,7 @@ func (nc *Controller) HealthyQPSFunc(nodeNum int) float32 {
return nc.evictionLimiterQPS
}
// ReducedQPSFunc returns the QPS for when a the cluster is large make
// ReducedQPSFunc returns the QPS for when the cluster is large make
// evictions slower, if they're small stop evictions altogether.
func (nc *Controller) ReducedQPSFunc(nodeNum int) float32 {
if int32(nodeNum) > nc.largeClusterThreshold {