Container Hardening

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Secure container images and runtime configurations.

Category: AI & Intelligent Agents
Repo: antigravity-awesome-skills
Path: skills/container-hardening/SKILL.md
Updated: 10/11/2026, 8:00:18 PM
Open on GitHubHow to Install

AI Summary

Secure container images and runtime configurations. It is useful for LLM applications, agent orchestration, RAG pipelines, AI evaluation, and multi-agent workflows. Source: antigravity-awesome-skills (skills/container-hardening/SKILL.md).

Container Hardening

Secure container images and runtime configurations.

When to Use This Skill

Use this skill when:

  • Building secure container images
  • Hardening container deployments
  • Meeting container security requirements
  • Implementing defense in depth

Dockerfile Security

# Use minimal base image
FROM alpine:3.18

# Don't run as root
RUN addgroup -g 1001 -S appgroup && \
    adduser -u 1001 -S appuser -G appgroup

# Copy with specific ownership
COPY --chown=appuser:appgroup . /app

# Remove unnecessary packages
RUN apk del --purge build-dependencies && \
    rm -rf /var/cache/apk/*

# Use non-root user
USER appuser

# Read-only filesystem support
WORKDIR /app

Runtime Security

# Run with security options
docker run -d \
  --read-only \
  --tmpfs /tmp \
  --security-opt=no-new-privileges:true \
  --cap-drop=ALL \
  --cap-add=NET_BIND_SERVICE \
  --user 1001:1001 \
  myapp:latest

Kubernetes Security Context

apiVersion: v1
kind: Pod
spec:
  securityContext:
    runAsNonRoot: true
    runAsUser: 1001
    fsGroup: 1001
  containers:
  - name: app
    securityContext:
      allowPrivilegeEscalation: false
      readOnlyRootFilesystem: true
      capabilities:
        drop: ["ALL"]

Image Scanning

# Scan with Trivy
trivy image --severity HIGH,CRITICAL myapp:latest

# Use distroless images
FROM gcr.io/distroless/static-debian11

Best Practices

  • Use minimal base images
  • Run as non-root user
  • Enable read-only filesystem
  • Drop all capabilities
  • Scan images regularly
  • Sign and verify images
  • Use secrets management

Related Skills

  • container-scanning (container-scanning) - Vulnerability scanning
  • kubernetes-hardening (kubernetes-hardening) - K8s security

Limitations

  • Apply guidance only within authorized scope; test destructive steps in non-production first.
  • Docs-only import: upstream scripts and templates not bundled.

Example

# Read-only first: inventory before any active step.
which <tool> && <tool> --help | head -n 20

Adapted from BagelHole/DevOps-Security-Agent-Skills (MIT); frontmatter, When to Use/Limitations, and safety boundaries added for upstream compliance. Docs-only import: helper scripts and templates not bundled.

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