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Tycho Andersen cb19e69e62 cgroup: support --cgroup-root on dump too 
The problem here is again caused by systemd :). Every process lives in some
child cgroup and not the root one, so we end up with a bunch of stuff like:

/init.scope
/system.slice/...
/user.slice/...

and nothing in the root cgroup. However, systemd opens
/sys/fs/cgroup/systemd, changes the perms, and keeps a fd around.
Unfortuantely, we don't track the perms on the "real root" cgroup here,
because nothing is at that level, so when we restore, our cgroup perms
changing code doesn't catch this perms change, and we get:

(00.361723)      1: Error (criu/files-reg.c:1487): File sys/fs/cgroup/systemd has bad mode 040755 (expect 040775)

To fix this, let's just support the --cgroup-root argument on dump too, and
rewrite the cgroup paths we dump accordingly.

Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
2016-09-26 15:42:43 +03:00
contrib Add script to install required packages to compile in Debian 2016-09-26 15:42:43 +03:00
coredump coredump: Rename dir to coredump 2016-06-28 13:04:58 +03:00
crit crit/decode: set default opts['nopl'] to False 2016-05-30 13:47:54 +03:00
criu cgroup: support --cgroup-root on dump too 2016-09-26 15:42:43 +03:00
Documentation criu: fix some spelling errors in criu.txt 2016-06-28 13:12:59 +03:00
images ppc64: handle transactional memory state 2016-09-06 19:31:22 +03:00
lib criu: almost fix building on Alpine Linux 2016-07-09 22:04:26 +03:00
scripts Add script to install required packages to compile in Debian 2016-09-26 15:42:43 +03:00
test tests: add a test for memory/devices "specialness" 2016-09-26 15:42:42 +03:00
.gitignore uninstall: use --record with setup.py, v2 2016-05-06 14:38:29 +03:00
.mailmap repo: Add mailmap file 2012-03-25 23:31:20 +04:00
.travis.yml travis: turn on alpine build 2016-09-06 19:00:21 +03:00
COPYING COPYING: fix a typo in a preamble 2016-08-11 16:18:43 +03:00
CREDITS Add the CREDITS file 2012-07-30 13:52:37 +04:00
INSTALL.md build: Add INSTALL.md and update "make help" 2016-05-06 14:38:29 +03:00
Makefile Makefile: add -Wformat-security to CFLAGS 2016-09-08 05:10:52 +03:00
Makefile.install build/make: return to make from top directory 2016-08-01 18:38:32 +03:00
Makefile.versions criu: Version 2.6 2016-09-12 12:44:04 +03:00
README.md Add ascciinema tour on basic criu features. 2016-06-16 16:37:06 +03:00

README.md

CRIU (Checkpoint and Restore in Userspace)

An utility to checkpoint/restore tasks. 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.

The project home is at http://criu.org.

Pages worth starting with are:

A video tour on basic CRIU features

CRIU introduction

How to contribute