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Set Resource Limits in Kubernetes Pods.md

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Problem Statement

The Nautilus DevOps team has noticed performance issues in some Kubernetes-hosted applications due to resource constraints. To address this, they plan to set limits on resource utilization. Here are the details:

Create a pod named httpd-pod with a container named httpd-container. Use the httpd image with the latest tag (specify as httpd:latest). Set the following resource limits:

  • Requests:

    • Memory: 15Mi
    • CPU: 100m

  • Limits:

    • Memory: 20Mi
    • CPU: 100m

Solution

1. Create the Pod Configuration

First, create a Pod YAML file with the specified requirements.

apiVersion: v1
kind: Pod
metadata:
  name: httpd-pod
spec:
  containers:
  - name: httpd-container
    image: httpd:latest
    resources:
      requests:
        memory: "15Mi"
        cpu: "100m"
      limits:
        memory: "20Mi"
        cpu: "100m"
  dnsPolicy: ClusterFirst
  restartPolicy: Always

2. Apply the Pod Configuration

Apply the Pod configuration to create the Pod in the Kubernetes cluster.

kubectl apply -f - <<EOF
apiVersion: v1
kind: Pod
metadata:
  name: httpd-pod
spec:
  containers:
  - name: httpd-container
    image: httpd:latest
    resources:
      requests:
        memory: "15Mi"
        cpu: "100m"
      limits:
        memory: "20Mi"
        cpu: "100m"
  dnsPolicy: ClusterFirst
  restartPolicy: Always
EOF

3. Verify the Pod

Check the Pods created to ensure that the Pod is properly set up and running.

kubectl get pods

Expected output:

NAME        READY   STATUS    RESTARTS   AGE
httpd-pod   1/1     Running   0          <age>

By following these steps, you will create a Pod with specified resource requests and limits to manage resource utilization effectively. The Pod will be using the latest httpd image, and you can verify its status using the kubectl get pods command.