Rocket
A pod-native container engine for Linux designed to be secure, composable, and standards-based.
What is Rocket?
rkt is a pod-native container engine for Linux that provides a secure, composable, and standards-based alternative to other container runtimes. It runs application containers with a focus on security features like SELinux and hardware isolation, while supporting integration with orchestration tools like Kubernetes. The project emphasizes adherence to open standards such as App Container (appc) and OCI specifications.
Linux system administrators, DevOps engineers, and developers working with containerized applications who need a secure and standards-compliant container runtime. It's particularly relevant for those integrating containers with init systems or cluster orchestration platforms.
Developers choose rkt for its strong security defaults, pod-native architecture that aligns with Kubernetes concepts, and commitment to open standards. Its composability with existing tools and support for multiple image formats make it a flexible choice for production environments.
Overview
[Project ended] rkt is a pod-native container engine for Linux. It is composable, secure, and built on standards.
Use Cases
Best For
- Running secure containerized applications on Linux with SELinux enforcement
- Integrating containers with systemd or other init systems
- Using pods as the primary execution unit in container orchestration
- Deploying containers in environments requiring hardware isolation via KVM
- Adopting open container standards like App Container (appc) and OCI
- Running Docker images in a pod-native, security-focused runtime
Not Ideal For
- New projects requiring active maintenance, security updates, and community support
- Production environments where vendor-backed runtimes like Docker or containerd are preferred for stability
- Teams looking for a container runtime with a vibrant ecosystem and extensive third-party integrations
Pros & Cons
Pros
Uses pods as the basic unit, aligning with Kubernetes concepts for easier integration with orchestration tools, as highlighted in the pod-native feature.
Implements secure-by-default principles with SELinux enforcement, TPM measurement, and KVM-based hardware isolation, providing enhanced security out of the box.
Adheres to App Container (appc) and OCI specifications, and can run Docker images, ensuring interoperability with various container formats.
Designed for seamless integration with init systems like systemd and cluster tools like Kubernetes, offering flexibility in deployment environments.
Cons
Development has officially halted with the repository archived, meaning no new features, bug fixes, or security updates, as stated in the README warning.
Compared to Docker, rkt has a smaller community and fewer third-party tools, which can hinder support and integration for complex workflows.
Configuring hardware isolation with KVM or deep SELinux integration requires more expertise and effort than simpler, more mainstream container runtimes.
Open Source Alternative To
Rocket is an open-source alternative to the following products:
Frequently Asked Questions
Related Projects
firecrackerSecure and fast microVMs for serverless computing.
podmanPodman: A tool for managing OCI containers and pods.
runcCLI tool for spawning and running containers according to the OCI specification
BockerDocker implemented in around 100 lines of bash
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