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Karpenter EC2NodeClass supports maxPods and kubeReserved directly in the spec #607

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Karpenter EC2NodeClass supports maxPods and kubeReserved directly in the spec #607

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Karpenter EC2NodeClass supports maxPods and kubeReserved directly in …
wcarlsen Jun 19, 2026
9d8c00d
Added 200Mi for systemReserved
wcarlsen Jun 22, 2026
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38 changes: 15 additions & 23 deletions apps/karpenter-nodes/classes/al2023.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,12 @@ spec:
karpenter.sh/discovery: "${flux_cluster_name}"
detailedMonitoring: true
associatePublicIPAddress: true
kubelet:
maxPods: 110
kubeReserved:
memory: 1465Mi # 255Mi + (11Mi * maxPods)
systemReserved:
memory: 200Mi
userData: |
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="BOUNDARY"
Expand All @@ -34,9 +40,6 @@ spec:
#!/bin/sh
set -o xtrace

echo fs.inotify.max_user_watches=131072 | sudo tee -a /etc/sysctl.conf
sudo sysctl -p

DOCKER_HUB_CREDS=$(aws ssm get-parameter --name /eks/${flux_cluster_name}/dockerhub --with-decrypt --query 'Parameter.Value' --output text)
DOCKER_HUB_USER=$(echo "$DOCKER_HUB_CREDS" | jq .username)
DOCKER_HUB_PASSWD=$(echo "$DOCKER_HUB_CREDS" | jq .password)
Expand All @@ -57,14 +60,7 @@ spec:
spec:
kubelet:
config:
maxPods: 110
registryPullQPS: 0
kubeReserved:
cpu: 700m
memory: 1024Mi
systemReserved:
cpu: 700m
memory: 1024Mi
registryPullQPS: 0 # since not available in the spec

--BOUNDARY--

Expand Down Expand Up @@ -94,6 +90,12 @@ spec:
karpenter.sh/discovery: "${flux_cluster_name}"
detailedMonitoring: true
associatePublicIPAddress: true
kubelet:
maxPods: 110
kubeReserved:
memory: 1465Mi # 255Mi + (11Mi * maxPods)
systemReserved:
memory: 200Mi
userData: |
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="BOUNDARY"
Expand All @@ -104,9 +106,6 @@ spec:
#!/bin/sh
set -o xtrace

echo fs.inotify.max_user_watches=131072 | sudo tee -a /etc/sysctl.conf
sudo sysctl -p

DOCKER_HUB_CREDS=$(aws ssm get-parameter --name /eks/${flux_cluster_name}/dockerhub --with-decrypt --query 'Parameter.Value' --output text)
DOCKER_HUB_USER=$(echo "$DOCKER_HUB_CREDS" | jq .username)
DOCKER_HUB_PASSWD=$(echo "$DOCKER_HUB_CREDS" | jq .password)
Expand All @@ -127,13 +126,6 @@ spec:
spec:
kubelet:
config:
maxPods: 110
registryPullQPS: 0
kubeReserved:
cpu: 700m
memory: 1024Mi
systemReserved:
cpu: 700m
memory: 1024Mi
registryPullQPS: 0 # since not available in the spec

--BOUNDARY--
--BOUNDARY--