Have you configured which containers to start, how to scale replicas?

Yes, I have configured containers using Docker and managed scaling of replicas through Kubernetes. For example, for a frontend application, I created a Dockerfile, described the container with the necessary environment, and then set the number of replicas in Kubernetes Deployment to ensure fault tolerance and load balancing.

Example of scaling configuration in Kubernetes:

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

This scaling allows for automatic load distribution and increased application availability.