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Otherwise, you just see an anonymous failure in the logs, like: (00.244773) mnt: Dumping mountpoints (00.244781) mnt: 253: 42:/ @ ./dev/.lxc (00.244793) mnt: Path `/dev/.lxc' resolved to `./dev/.lxc' mountpoint (00.249039) mnt: 133: 41:/ @ ./dev/hugepages (00.249052) mnt: 116: 40:/ @ ./run/lock (00.249064) mnt: Path `/run/lock' resolved to `./run/lock' mountpoint (00.251948) mnt: 115: 3f:/ @ ./run (00.251970) mnt: Something is mounted on top of ./run (00.264803) mnt: Path `/run' resolved to `./run' mountpoint tar: ./uuidd/request: socket ignored tar: ./dbus/system_bus_socket: socket ignored tar: ./acpid.socket: socket ignored tar: ./systemd/journal/syslog: socket ignored tar: ./systemd/journal/dev-log: socket ignored tar: ./systemd/journal/socket: socket ignored tar: ./systemd/journal/stdout: socket ignored tar: ./systemd/private: socket ignored tar: ./systemd/notify: socket ignored (00.368950) mnt: 113: 3e:/ @ ./dev/shm (00.368978) mnt: Path `/dev/shm' resolved to `./dev/shm' mountpoint (00.371551) mnt: 112: 3d:/ @ ./dev/pts (00.371566) mnt: 249: 28:/ @ ./var/lib/lxcfs (00.371749) Unlock network (00.371762) Running network-unlock scripts (00.371766) Unfreezing tasks into 1 (00.371770) Unseizing 13683 into 1 (00.371784) Unseizing 14839 into 1 (00.371794) Unseizing 15678 into 1 (00.371800) Unseizing 16126 into 1 (00.371805) Unseizing 16177 into 1 (00.371814) Unseizing 16301 into 1 (00.371843) Unseizing 16323 into 1 (00.371854) Unseizing 16414 into 1 (00.371900) Unseizing 16595 into 1 (00.371911) Unseizing 16695 into 1 (00.371942) Unseizing 16744 into 1 (00.371964) Unseizing 16904 into 1 (00.372103) Unseizing 16944 into 1 (00.372140) Unseizing 17558 into 1 (00.372196) Error (cr-dump.c:1631): Dumping FAILED. ...which is hard to debug. Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
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:
- Kernel configuration, compilation, etc
- A simple example of usage
- More sophisticated example with graphical app
How to contribute
- How to submit patches;
- Send all bug reports to mailing list;
- Spread the word about CRIU in social networks;