With the recent approved review of the package crtools in Fedora I have made a feature proposal for checkpoint/restore.

To test checkpoint/restore on Fedora you need to run the current development version of Fedora and install crtools using yum (yum install crtools). Until it is decided if it actually will be a Fedora 19 feature and the necessary changes in the Fedora kernel packages have been implemented it is necessary to install a kernel which is not in the repository. I have built a kernel in Fedora’s buildsystem which enables the following config options: CHECKPOINT_RESTORE, NAMESPACES, EXPERT.

A kernel with these changes enabled is available from koji as a scratch build: http://koji.fedoraproject.org/koji/taskinfo?taskID=4899525

After installing this kernel I am able to migrate a process from one Fedora system to another. For my test case I am migrating a UDP ping pong (udpp.c) program from one system to another while communicating with a third system.

udpp is running in server mode on 129.143.116.10 and on 134.108.34.90 udpp is started in client mode. After a short time I am migrating, with the help of crtools, the udpp client to 85.214.67.247. The following is part of the output on the udpp server:

-->

Received ping packet from 134.108.34.90:38374
Data: This is ping packet 6

Sending pong packet 6
<–
–>

Received ping packet from 134.108.34.90:38374
Data: This is ping packet 7

Sending pong packet 7
<–
–>

Received ping packet from 85.214.67.247:38374
Data: This is ping packet 8

Sending pong packet 8
<–
–>

Received ping packet from 85.214.67.247:38374
Data: This is ping packet 9

Sending pong packet 9
<–

So with only little changes to the kernel configuration it is possible to migrate a process by checkpointing and restoring a process with the help of crtools.