runc is a CLI tool for spawning and running containers on Linux according to the OCI specification.
The tool addresses the need for a standardized, low-level container runtime that implements the Open Container Initiative specification. runc works by taking container configurations and using Linux kernel features to isolate and execute processes. It serves as the reference implementation of the OCI runtime specification, providing a direct interface to container lifecycle operations without requiring a higher-level orchestration layer.
runc is suited for projects that need a lightweight, standards-compliant container runtime, particularly those building container platforms, orchestration systems, or tools that require direct control over container execution. It is the runtime used by Docker and other container engines. The tool supports optional features including seccomp for system call filtering and libpathrs for enhanced path safety during container setup. Adoption requires a Linux system and Go toolchain, with additional build dependencies varying by distribution.
The project maintains signed releases and has undergone third-party security audits. Development activity shows attention to security practices through formal disclosure processes and cryptographic verification of releases. The codebase demonstrates careful dependency management, including support for optional Rust-based components like libpathrs for improved security posture. Build configuration is flexible, allowing developers to customize features and version strings to suit their deployment needs.
