Tell about your experience working with Kubernetes: what did you configure, how did you deploy clusters?

In my experience with Kubernetes, I have been involved in configuring and deploying clusters to ensure scalability and high availability of applications.

Main tasks I performed:

• Deploying clusters using kubeadm and managing them with kubectl.
• Configuring manifests for Deployment, Service, ConfigMap, and Secret to manage applications.
• Organizing automatic scaling (Horizontal Pod Autoscaler) and zero-downtime updates (Rolling Update).
• Setting up monitoring with Prometheus and Grafana, as well as logging through the EFK stack.
• Working with network plugins (Calico, Flannel) to ensure network connectivity.

Example of a simple Deployment for nginx:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:latest
        ports:
        - containerPort: 80

This experience allows for effective management of containerized applications in production.