Tell about working with Docker and Kubernetes: what have you had to do?

In working with Docker and Kubernetes on Go projects, I had to:

• Create Dockerfiles for containerizing Go applications, optimizing the image size (for example, using multi-stage builds with scratch or alpine).
• Configure docker-compose for local development and testing of multiple services.
• Write Kubernetes manifests (Deployment, Service, ConfigMap, Secret) for deploying applications in a cluster.
• Set up automatic scaling (Horizontal Pod Autoscaler) and zero-downtime updates (Rolling Update).
• Use Helm for managing complex configurations and deployment templates.
• Debug applications in Kubernetes using kubectl logs, kubectl exec, and port-forward.

Example Dockerfile for a Go application:

FROM golang:1.20-alpine AS builder
WORKDIR /app
COPY . .
RUN go build -o myapp

FROM alpine:latest
WORKDIR /app
COPY --from=builder /app/myapp .
CMD ["./myapp"]

This approach allows creating lightweight and portable images for deployment in Kubernetes.