Add kubelet flags for eviction threshold config

cmd/kubelet/app/options/options.go

@@ -254,4 +254,7 @@ func (s *KubeletServer) AddFlags(fs *pflag.FlagSet) {
 	fs.StringVar(&s.NodeIP, "node-ip", s.NodeIP, "IP address of the node. If set, kubelet will use this IP address for the node")
 	fs.BoolVar(&s.EnableCustomMetrics, "enable-custom-metrics", s.EnableCustomMetrics, "Support for gathering custom metrics.")
 	fs.StringVar(&s.RuntimeCgroups, "runtime-cgroups", s.RuntimeCgroups, "Optional absolute name of cgroups to create and run the runtime in.")
+	fs.StringVar(&s.EvictionHard, "eviction-hard", s.EvictionHard, "A set of eviction thresholds (e.g. memory.available<1Gi) that if met would trigger a pod eviction.")
+	fs.StringVar(&s.EvictionSoft, "eviction-soft", s.EvictionSoft, "A set of eviction thresholds (e.g. memory.available<1.5Gi) that if met over a corresponding grace period would trigger a pod eviction.")
+	fs.StringVar(&s.EvictionSoftGracePeriod, "eviction-soft-grace-period", s.EvictionSoftGracePeriod, "A set of eviction grace periods (e.g. memory.available=1m30s) that correspond to how long a soft eviction threshold must hold before triggering a pod eviction.")
 }

pkg/apis/componentconfig/types.go

@@ -341,6 +341,12 @@ type KubeletConfiguration struct {
 	NonMasqueradeCIDR string `json:"nonMasqueradeCIDR"`
 	// enable gathering custom metrics.
 	EnableCustomMetrics bool `json:"enableCustomMetrics"`
+	// Comma-delimited list of hard eviction expressions.  For example, 'memory.available<300Mi'.
+	EvictionHard string `json:"evictionHard,omitempty"`
+	// Comma-delimited list of soft eviction expressions.  For example, 'memory.available<300Mi'.
+	EvictionSoft string `json:"evictionSoft,omitempty"`
+	// Comma-delimeted list of grace periods for each soft eviction signal.  For example, 'memory.available=30s'.
+	EvictionSoftGracePeriod string `json:"evictionSoftGracePeriod,omitempty"`
 }
 
 type KubeSchedulerConfiguration struct {