Will Anderson
81c301f013
Kubernetes rejects minReplicas=0 unless at least one Object or External metric is configured. With only a Resource (CPU) metric, the HPA is invalid: HorizontalPodAutoscaler.autoscaling "neuron-marketing-hpa" is invalid: [spec.minReplicas: Invalid value: 0: must be greater than or equal to 1, spec.metrics: Forbidden: must specify at least one Object or External metric to support scaling to zero replicas] This was blocking the entire neuron-prod Argo CD sync — every manifest in the directory had to be applied individually after this single resource caused the multi-resource patch to fail. The dharma NetworkPolicy applied today only because Argo retried individually after the failure. The file header already states "minReplicas=1 prevents unnecessary idle waste" as the intent for this single-Legion-node period; this brings the marketing HPA into line with the other two.
104 lines
2.5 KiB
YAML
104 lines
2.5 KiB
YAML
---
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# HorizontalPodAutoscalers for neuron-prod
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# Single Legion node today — minReplicas=1 prevents unnecessary idle waste.
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# When GCP GKE is live these minimums should go to 2 for HA.
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apiVersion: autoscaling/v2
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kind: HorizontalPodAutoscaler
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metadata:
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name: neuron-mcp-hpa
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namespace: neuron-prod
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spec:
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scaleTargetRef:
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apiVersion: apps/v1
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kind: Deployment
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name: neuron-mcp-blue
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minReplicas: 1
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maxReplicas: 6
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metrics:
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- type: Resource
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resource:
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name: cpu
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target:
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type: Utilization
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averageUtilization: 65
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- type: Resource
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resource:
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name: memory
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target:
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type: Utilization
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averageUtilization: 80
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behavior:
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scaleDown:
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stabilizationWindowSeconds: 300 # Don't thrash — wait 5m before scaling down
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policies:
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- type: Pods
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value: 1
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periodSeconds: 120
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scaleUp:
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stabilizationWindowSeconds: 30
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policies:
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- type: Pods
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value: 2
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periodSeconds: 60
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---
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apiVersion: autoscaling/v2
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kind: HorizontalPodAutoscaler
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metadata:
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name: neuron-rest-hpa
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namespace: neuron-prod
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spec:
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scaleTargetRef:
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apiVersion: apps/v1
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kind: Deployment
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name: neuron-rest
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minReplicas: 1
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maxReplicas: 4
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metrics:
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- type: Resource
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resource:
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name: cpu
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target:
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type: Utilization
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averageUtilization: 65
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- type: Resource
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resource:
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name: memory
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target:
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type: Utilization
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averageUtilization: 80
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behavior:
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scaleDown:
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stabilizationWindowSeconds: 300
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scaleUp:
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stabilizationWindowSeconds: 30
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---
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apiVersion: autoscaling/v2
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kind: HorizontalPodAutoscaler
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metadata:
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name: neuron-marketing-hpa
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namespace: neuron-prod
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spec:
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scaleTargetRef:
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apiVersion: apps/v1
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kind: Deployment
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name: neuron-marketing
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# minReplicas=1 to match the file's own convention (see header comment).
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# Kubernetes only allows minReplicas=0 when at least one Object or External
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# metric is configured (queue depth, custom signal, etc.); with only a
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# Resource (CPU) metric, scale-to-zero is rejected and the whole HPA is
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# invalid — which was blocking neuron-prod's Argo CD sync.
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minReplicas: 1
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maxReplicas: 8
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metrics:
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- type: Resource
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resource:
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name: cpu
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target:
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type: Utilization
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averageUtilization: 70
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behavior:
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scaleDown:
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stabilizationWindowSeconds: 120
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scaleUp:
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stabilizationWindowSeconds: 15
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