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Containerd - An Open and Reliable Container Runtime

Containerd is an open and reliable container runtime that manages the complete container lifecycle of its host system, from image transfer and storage to container execution and supervision.

Go
Added on 2025年6月23日
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Containerd - An Open and Reliable Container Runtime preview
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Project Introduction

Summary

Containerd is a core container runtime that provides a minimal set of functionalities needed to run and manage containers on a node. It's designed to be embedded into larger systems like orchestrators or container platforms.

Problem Solved

Containerd addresses the need for a robust, standardized, and low-level runtime layer that can be consumed by higher-level systems (like Kubernetes or Docker) without including orchestration complexities. It provides a stable base for building container platforms.

Core Features

Image Management

Manages pushing and pulling container images, storing them efficiently.

Container Execution and Lifecycle

Provides APIs and tools for creating, starting, stopping, and deleting containers.

Low-Level Runtime Interface

Handles low-level container operations, including process management and namespaces.

Pluggable Architecture

Supports integration with various storage and network plugins.

Tech Stack

Go
gRPC
Linux Namespaces
cgroups
Rust (optional components)
C

Use Cases

Containerd is a foundational component used in various container-related scenarios, typically as the underlying runtime for higher-level systems.

Powering Kubernetes Clusters

Details

Containerd is the default runtime for Kubernetes, providing the core functionality to pull images and run/manage pods.

User Value

Enables Kubernetes to manage containers efficiently and reliably across nodes.

Underlying Runtime for Docker

Details

Used by projects like Docker Engine to execute and manage containers on a host.

User Value

Provides Docker with a robust, separate runtime component, improving modularity and stability.

Building Custom Container Platforms

Details

Developers building custom container tools or platforms can use containerd's API to handle low-level container operations.

User Value

Offers a solid, standards-compliant base, reducing the need to reimplement core container runtime logic.

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