CRIU

Tarball:	criu-4.0.tar.gz
Version:	4.0 "CRIUDA"
Released:	20 Sep 2024
GIT tag:	v4.0

Installation • Usage

Releases

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

Checkpoint/Restore In Userspace, or CRIU (pronounced kree-oo, IPA: /krɪʊ/, Russian: криу), 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.

http://static.openvz.org/criu_88x31.gif is a project of http://static.openvz.org/openvz_88x31.gif and is supported by http://static.openvz.org/odin_88x31.png and your donations.

Using

Getting packages for your distribution: Or try manual installation to have CRIU on your system

CLI, RPC and C API: Three ways to start using the C/R functionality

Usage scenarios: Ideas how criu can be used (some are crazy indeed)

Category:HOWTO: Collection of real world examples of how to use CRIU. Some are complex, some are not. HOW TO dump a simple loop might be the best one to start with. Also a set of asciinema records for real-life examples.

Category:API: Collection of pages about CRIU's API.

When C/R fails: A sort of troubleshooting guide

What can change after C/R: CRIU cannot (yet) save and restore every single bit of tasks' state. This page describes what bits visible through standard kernel API are such.

What cannot be checkpointed: What an application could do to make CRIU refuse to dump it.

Contacts: Ways to communicate with CRIU community

Developing

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

Images: Description of image files format

Plugins: CRIU can call plugins provided by people

Upstream kernel commits: Mainline kernel commits tracker

Recent commits: CRIU tool repository commits

Manpages: Kernel's manpages commits tracker

ZDTM Test Suite: Zero downtime test suite

TODO: Current TODO list

User namespace: Implementing user namespace support

Postulates: What to keep in mind when writing new code

Code coverage results: Shows how zdtm run covers the criu code paths

How to submit patches

Events
RSS • Atom

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)

More events… – Past events…

Under the hood

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...

Audio

2016-03-24, Физтех.Радио: https://vk.com/wall-24086381_35574
2015-07-17, DevZen podcast: Episode 50
2015-06-17, DevOps Дефлопе: #021 - нет больше CP и AP
2015-04-29, FLOSS Weekly: #334 CRIU
2014-08-02, Radio-T: #433
2014-12-22, Software Development podcast: SDcast #15
2014-12-04, DevOps Дефлопе: 015 - Из самого сердца Докера

Other

Project history
Logo description
Events
Join the CRIU acronym fun