CRIU is a sub-project of http://static.openvz.org/wiki/openvz-logo.png

Welcome to CRIU, a project to implement checkpoint/restore functionality for Linux in userspace.

Download Tarball: criu-4.0.tar.gz Version: 4.0 "CRIUDA" Released: 20 Sep 2024 GIT tag: v4.0 Installation • Usage Releases

{{#description2:Checkpoint/Restore In Userspace, or CRIU, is a software tool for Linux operating system. Using this tool, you can freeze a running application (or part of it) and checkpoint it to a hard drive as a collection of files. You can then use the files to restore and run the application from the point it was frozen at. The distinctive feature of the CRIU project is that it is mainly implemented in user space.}}

Using

CR tools

Main checkpoint/restore utility description (sort of HOWTO)

Usage scenarios

Ideas how crtools can be used (some are crazy indeed)

What software is supported

Describes TODO list in higher level terms

LXC

How to dump and restore an LXC container

Developing

If you're interested in CRIU development, please subscribe to the criu mailing list: https://openvz.org/mailman/listinfo/criu

Images

Description of image files format

Commits

Mainline kernel commits tracker

ZDTM Test Suite

Zero downtime test suite

TODO

Current TODO list

Events LinuxDays 2024 13 Oct 2024, On the Edge of Tomorrow: Checkpoint/Restore in Containers Kubernetes Community Days Austria 09 Oct 2024, Forensic container checkpointing and analysis Linux Plumbers Conference 2024 18-20 Sep 2024, Containers and Checkpoint/Restore Microconference Other talks: * Userspace memory persistence over kexec * Checkpoint/Restore In eBPF (CRIB)

Under the hood

• Sockets
• Memory dumping and restoring
• Checkpoint/Restore
• TCP connection
• Porting crtools to new kernel releases
• Files

External links

• 2024-11-14, On-demand and Parallel Checkpoint/Restore for GPU Applications
• 2024-09-06, Live Migration of Multi-Container Kubernetes Pods in Multi-Cluster Serverless Edge Systems
• 2024-09-04, Towards Efficient End-to-End Encryption for Container Checkpointing Systems
• 2024-08-04, Custom Page Fault Handling With eBPF
• 2024-08-03, Software-based Live Migration for Containerized RDMA
• 2024-07-30, Packet Buffering to Minimize Service Downtime and Packet Loss During Redundancy Switchover
• 2024-07-30, Don't, Stop, Drop, Pause: Forensics of CONtainer CheckPOINTs (ConPoint)
• 2024-07-25, MDB-KCP: persistence framework of in-memory database with CRIU-based container checkpoint in Kubernetes
• 2024-07-23, Dapper: A Lightweight and Extensible Framework for Live Program State Rewriting

More external articles...

Other

• Project history
• Logo description
• Events
• Join the CRIU acronym fun