Kubernetes Cluster Autoscaler

Kubernetes Cluster Autoscaler

• https://github.com/kubernetes/autoscaler/tree/master/cluster-autoscaler

• Providers: ClusterAPI

Annotations:

• cluster-autoscaler.kubernetes.io
• k8s.io/cluster-autoscaler/

• helm install cluster-autoscaler: values.yaml, cloudProvider, extraArgs

kubectl get pods -A | grep autoscaler
cluster-autoscaler              cluster-autoscaler-86cff49xx4-6tcht                        1/1     Running   1 
(109d ago)     123d

helm list -A | grep autoscaler
cluster-autoscaler            	cluster-autoscaler           	1       	2022-06-06 11:11:42.560486 +0200 CEST  	deployed	cluster-autoscaler-9.16.2         	1.23.0

 autoScaler:
   enabled: true
   min: 2
   max: 20

kubectl get pods -n cluster-autoscaler -o yaml cluster-autoscaler-0987654321

kubectl logs -n kube-system aws-cluster-autoscaler

kubectl get events -o yaml | grep message
 message: '0/2 nodes are available: 2 Insufficient cpu.'
 message: 'pod didnt trigger scale-up: '

Providers

AliCloud
AWS
Azure
BaiduCloud
BizflyCloud
Brightbox
CherryServers
Civo
CloudStack
ClusterAPI
CoreWeave
DigitalOcean
Exoscale
Equinix Metal
External gRPC
Hetzner
HuaweiCloud
IonosCloud
Kamatera
Kwok
Linode
Magnum
OracleCloud
OVHcloud
Rancher
Scaleway
TencentCloud
Vultr
Utho

Related terms

• Horizontal Pod Autoscaler (HPA)
• Kubernetes Vertical Pod Autoscaler (VPA)
• Karpenter
• kubectl scale deployment
• autoScaler:
• FailedScheduling
• Control Plane
• kubectl label nodes
• Kubernetes Cluster API (CAPI)
• Kubernetes Metrics Server (KMS)
• node group size reached

Activities

• Read https://docs.aws.amazon.com/eks/latest/userguide/autoscaling.html#cluster-autoscaler

See also

• cluster-autoscaler, NotTriggerScaleUp
• Kubernetes Cluster Autoscaler, Kubernetes Metrics Server (KMS), configmap/cluster-autoscaler-status, Kubernetes Vertical Pod Autoscaler (VPA), k8s.io/cluster-autoscaler/enabled, values.yaml
• Horizontal Pod Autoscaler (HPA), Horizontal cluster-proportional-autoscaler container, Kubernetes cluster-proportional-vertical-autoscaler, Kubernetes Horizontal cluster-proportional-autoscaler container, FailedGetResourceMetric, kind: HorizontalPodAutoscaler
• Kubernetes autoscaling, HPA, VPA, Karpenter, Kubernetes Autoscaler, kubectl autoscale, Kubernetes Metrics Server (KMS), KEDA, ScaleDown