Kubernetes on Ankit Maurya

Container Security Best Practices

Wed, 20 Mar 2024 00:00:00 +0000

Container security is critical in modern cloud-native applications. Here’s a comprehensive guide to securing your containerized workloads.

Container Images

Use Minimal Base Images

# Bad: Large base image with many dependencies
FROM ubuntu:22.04

# Good: Minimal image with just what's needed
FROM gcr.io/distroless/static-debian12

Distroless images contain only the application and its runtime dependencies, reducing the attack surface.

Multi-Stage Builds

# Build stage
FROM golang:1.22 AS builder
WORKDIR /app
COPY . .
RUN CGO_ENABLED=0 go build -o main

# Production stage
FROM gcr.io/distroless/static-debian12
COPY --from=builder /app/main /main
ENTRYPOINT ["/main"]

This keeps build tools and source code out of production images.