Fix: Disable MemoryQos due to increased OOMKills

charts/kubeadm/templates/KubeletConfiguration.yaml

@@ -6,6 +6,7 @@ cgroupDriver: cgroupfs
 logging:
   format: json
 hairpinMode: hairpin-veth
+ContainerRuntimeEndpoint: "unix:///var/run/crio/crio.sock"
 {{- if .Values.systemd }}
 resolvConf: /run/systemd/resolve/resolv.conf
 {{- end }}
@@ -32,6 +33,5 @@ kubeReserved:
 #evictionHard:
 #  memory.available: "484Mi"
 imageGCLowThresholdPercent: 70
-# kernelMemcgNotification: true
 serializeImagePulls: false
-maxParallelImagePulls: 2
+maxParallelImagePulls: 4

charts/kubeadm/templates/_helpers.tpl

@@ -1,7 +1,9 @@
 {{- /* Feature gates for all control plane components */ -}}
 {{- /* ToAdd: "PodAndContainerStatsFromCRI" */ -}}
+{{- /* Issues: "MemoryQoS" */ -}}
+{{- /* v1.28: "NodeSwap" */ -}}
 {{- define "kubeadm.featuregates" }}
-{{- $gates := list "CustomCPUCFSQuotaPeriod" "MemoryQoS" }}
+{{- $gates := list "CustomCPUCFSQuotaPeriod" }}
 {{- if eq .return "csv" }}
 {{- range $key := $gates }}
 {{- $key }}=true,

docs/v1.27.md

@@ -20,7 +20,6 @@
 
 ### FeatureGates
 - CustomCPUCFSQuotaPeriod
-- [MemoryQoS](https://kubernetes.io/blog/2023/05/05/qos-memory-resources/)
 
 # Upgrade
 `(No, really, you MUST read this before you upgrade)`