container-hardening

Harden container images and runtime environments with Dockerfile and Kubernetes security configurations.

46|4|Updated Jan 27, 2026

Search Tags:#container security #devsecops #runtime security #kubernetes security #image security #docker hardening

Ready to run

npx skills add https://github.com/BagelHole/DevOps-Security-Agent-Skills --skill container-hardening

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: container-hardening
Source: https://github.com/BagelHole/DevOps-Security-Agent-Skills/tree/main/security/hardening/container-hardening
Command: npx skills add https://github.com/BagelHole/DevOps-Security-Agent-Skills --skill container-hardening

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill addresses the critical need to secure containerized applications by implementing best practices for Dockerfiles and runtime configurations, reducing the attack surface and mitigating common vulnerabilities.

Core Features & Use Cases

Secure Dockerfile Practices: Guides users on building images with minimal privileges, non-root users, and reduced attack vectors.
Runtime Security Configuration: Provides examples for securing container execution with options like read-only filesystems, dropped capabilities, and user isolation.
Kubernetes Security Contexts: Demonstrates how to apply security best practices within Kubernetes Pod definitions.
Image Scanning Integration: Mentions tools for vulnerability scanning to ensure image integrity.
Use Case: A development team needs to ensure their microservices deployed in Kubernetes are hardened against common security threats. This skill provides the exact configurations and Dockerfile snippets needed.

Quick Start

Apply the provided Dockerfile snippet to your container image build process to enforce non-root user execution.

Frequently Asked Questions about container-hardening

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I secure Docker containers from build to runtime?▼

To secure Docker containers, you must harden Dockerfiles using minimal base images and non-root users, and enforce runtime security options like read-only filesystems and dropped capabilities. This reduces the attack surface and mitigates vulnerabilities.

What are the best practices for Kubernetes security contexts?▼

Kubernetes security contexts should enforce user isolation and restrict container privileges. Applying security contexts within Pod definitions ensures microservices deployed in Kubernetes are hardened against common security threats.

How do I configure a Dockerfile for non-root user execution?▼

Configuring a Dockerfile for non-root user execution involves applying specific snippets to your container image build process. This enforces minimal privileges and reduces attack vectors during containerized application deployment.

Does container hardening work with image vulnerability scanning?▼

Container hardening works alongside image vulnerability scanning to ensure image integrity. Integrating vulnerability scanning tools with Dockerfile and runtime security configurations provides comprehensive container security from build to runtime.

Why should I drop capabilities and use read-only filesystems in runtime security?▼

Dropping capabilities and using read-only filesystems secures container execution by isolating users and preventing unauthorized modifications. These runtime options mitigate common vulnerabilities by strictly limiting container privileges.