Merge pull request #470 from ingvagabund/new-relieve-and-migrate-op-profile

New DevKubeVirtRelieveAndMigrate profile

Author: openshift-merge-bot[bot]

README.md

@@ -107,6 +107,7 @@ The following profiles are currently provided:
 * [`LifecycleAndUtilization`](#LifecycleAndUtilization)
 * [`LongLifecycle`](#LongLifecycle)
 * [`CompactAndScale`](#compactandscale-techpreview)
+* [`devKubeVirtRelieveAndMigrate`](#devkubevirtrelieveandmigrate-techpreview)
 * [`EvictPodsWithPVC`](#EvictPodsWithPVC)
 * [`EvictPodsWithLocalStorage`](#EvictPodsWithLocalStorage)
 
@@ -152,6 +153,22 @@ An under utilized node is any node consuming less than 20% of its available cpu,
 This profile enables the [`HighNodeUtilization`](https://github.com/kubernetes-sigs/descheduler/#highnodeutilization) strategy.
 In the future, more configuration may be made available through the operator based on user feedback.
 
+### devKubeVirtRelieveAndMigrate
+
+This profiles seeks to evict pods from high-cost nodes to relieve overall expenses while considering workload migration.
+Node cost can include:
+- Actual resource utilization: Increased resource pressure leads to higher overhead for running applications.
+- Node maintenance costs: A higher number of containers on a node results in greater resource counting.
+Migration strategies may involve VM live migration, state transitions between stateful set pods, and other methods.
+
+This profile enables the [`LowNodeUtilization`](https://github.com/kubernetes-sigs/descheduler/#lownodeutilization) strategy
+with `EvictionsInBackground` alpha feature enabled.
+In the future, more configuration may be made available through the operator based on user feedback.
+
+The profile exposes the following customization:
+- `devLowNodeUtilizationThresholds`: Sets experimental thresholds for the LowNodeUtilization strategy.
+- `devActualUtilizationProfile`: Enable load-aware descheduling.
+
 ### EvictPodsWithPVC
 By default, the operator prevents pods with PVCs from being evicted. Enabling this
 profile in combination with any of the above profiles allows pods with PVCs to be

pkg/apis/descheduler/v1/types_descheduler.go

@@ -180,6 +180,9 @@ var (
 
 	// CompactAndScale seeks to evict pods to enable the same workload to run on a smaller set of nodes.
 	CompactAndScale DeschedulerProfile = "CompactAndScale"
+
+	// RelieveAndMigrate seeks to evict pods from high-cost nodes to relieve overall expenses while considering workload migration.
+	RelieveAndMigrate DeschedulerProfile = "DevKubeVirtRelieveAndMigrate"
 )
 
 // DeschedulerProfile allows configuring the enabled strategy profiles for the descheduler