Limit number of pods per node for Karpenter nodes

Signed-off-by: Mikkel Oscar Lyderik Larsen <[email protected]>

Author: mikkeloscar

cluster/config-defaults.yaml

@@ -32,6 +32,8 @@ karpenter_controller_cpu: "25m"
 karpenter_controller_memory: "256Mi"
 # set log level of karpenter: error|debug
 karpenter_log_level: "error"
+# restrict the maximum number of pods for karpenter nodes
+karpenter_max_pods_per_node: "32"
 
 # ALB config created by kube-aws-ingress-controller
 kube_aws_ingress_controller_ssl_policy: "ELBSecurityPolicy-TLS-1-2-2017-01"

cluster/node-pools/worker-karpenter/provisioners.yaml

@@ -174,6 +174,9 @@ spec:
       kubelet:
         clusterDNS: [ "10.0.1.100" ]
         cpuCFSQuota: false
+# {{ if ne .Cluster.ConfigItems.karpenter_max_pods_per_node "" }}
+        maxPods: {{ .Cluster.ConfigItems.karpenter_max_pods_per_node }}
+# {{ end }}
         maxPods: {{ nodeCIDRMaxPods (parseInt64 .Cluster.ConfigItems.node_cidr_mask_size) (parseInt64 .Cluster.ConfigItems.node_max_pods_extra_capacity) }}
         systemReserved:
           cpu: "{{ .Cluster.ConfigItems.kubelet_system_reserved_cpu }}"