Bits of .NET

💰 Cost Optimization = Cloud Savings

Cloud costs can spiral. Smart resource management in Kubernetes can reduce cloud bills by 30-50%.

📝 Resource Optimization

# Right-Sizing Workloads
apiVersion: apps/v1
kind: Deployment
metadata:
    name: optimized-app
spec:
    template:
        spec:
            containers:
            - name: app
                image: myapp:latest
                resources:
                    requests:
                        memory: "128Mi"
                        cpu: "50m"
                    limits:
                        memory: "256Mi"
                        cpu: "200m"

# QoS Classes
- Guaranteed: requests = limits (Best performance)
- Burstable: requests < limits (Balanced)
- BestEffort: no requests/limits (Cost-effective)

# Node Affinity for Spot Instances
apiVersion: v1
kind: Pod
spec:
    affinity:
        nodeAffinity:
            preferredDuringSchedulingIgnoredDuringExecution:
            - weight: 100
                preference:
                    matchExpressions:
                    - key: node-type
                        operator: In
                        values:
                        - spot

# Tolerations for Spot Instances
apiVersion: apps/v1
kind: Deployment
spec:
    template:
        spec:
            tolerations:
            - key: spot
                operator: Equal
                value: true
                effect: NoSchedule

🎯 Cost Monitoring Tools

# Kubecost Installation
helm repo add kubecost https://kubecost.github.io/cost-analyzer/
helm install kubecost kubecost/cost-analyzer

# View Costs
kubectl cost namespace   # Costs per namespace
kubectl cost deployment # Costs per deployment
kubectl cost pod        # Costs per pod
kubectl cost node       # Costs per node

# Resource Usage Dashboard
kubectl top nodes
kubectl top pods --sort-by=cpu
kubectl top pods --sort-by=memory

# VPA Recommendations (Recommendation Mode)
apiVersion: autoscaling.k8s.io/v1
kind: VerticalPodAutoscaler
metadata:
    name: recommend-only-vpa
spec:
    targetRef:
        apiVersion: apps/v1
        kind: Deployment
        name: my-app
    updatePolicy:
        updateMode: Off
    resourcePolicy:
        containerPolicies:
        - containerName: '*'
            controlledResources: [cpu, memory]

💡 Cost Optimization Tips

• Use spot instances for non-critical workloads
• Implement cluster autoscaling
• Use namespaces for cost allocation
• Set resource quotas per namespace
• Regularly review resource requests/limits