Suka, To make these patches available for those who want to try out lxc + c/r, I pulled them to a separate branch: ckpt-v19-suka.
(The last two did not apply cleanly because of recent changes to the Makefile so I merged them manually - let me know if it breaks). Oren Sukadev Bhattiprolu wrote: > Following two sets of patches is an early attempt to integrate LXC and > USER-CR. > > Overview: > > Have USER-CR export the core checkpoint and restart functionality into a > library (/lib/libcheckpoint.a and <usercr.h>) and have LXC link with this > library. > > TODO: > > 1. For now, libcheckpoint.a implements only the restart functionality > and so only lxc_restart command is implemented. Implementing the > checkpoint functionality and lxc_checkpoint command can be done > similarly and is hopefully easier than the restart functionality. > > 2. The restart() functionality in user-cr makes extensive use of global > variables and debug code. The API must be extended to properly > include these variables/debug code in the API. > > Similarly, the 'struct restart_args' may need to be sanitized for > use in a formal API. > > 3. lxc_restart command restarts entire containers only (specifically > it simulates the --pidns --pids --mount-pty arguments to > /bin/restart). > > 4. Link lxc_restart and lxc_checkpoint with the shared library > liblxc.so (currently links statically) > > 5. ... > > > STATUS: > I was able to checkpoint/restart a simple '/bin/sleep 1000' LXC > container, except for a cgroup naming issue after restart (see below). > > STEPS: > > 1. [USER-CR] Build/install /lib/libcheckpoint.a, /usr/include/usercr.h > > 1.1 Apply the attached [user-cr] patches to the user-cr git tree > (I tested with following commit as base) > > commit 67cfee9329670ab28eb1a52e94745252b614718f > Author: Oren Laadan <[email protected]> > Date: Mon Feb 22 18:00:06 2010 -0500 > > 1.2 Build/install user-cr binaries/libraries/includes > > $ make all > > $ make install > > This should install /lib/libcheckpoint.a and /usr/include/usercr.h > > 2. [LXC] Build lxc_restart using USER-CR API (usercr.h, libcheckpoint.a) > > 2.1 Apply attached [lxc] patches to Daniel Lezcano's lxc.git tree (0.6.5) > > 2.2 Build lxc_restart (this uses static linking for now) > > $ make -f Makefile2 lxc_restart > > 3. Create and checkpoint a simple LXC container > > $ lxc-execute --name foo --rcfile lxc-macvlan.conf -- /bin/sleep 1000 > > $ lxc-freeze --name foo > > TODO: > lxc_checkpoint --name foo should checkpoint the container, > For now, use "lxc-ps --name foo" to find pid of lxc-init and > checkpoint using: > > $ /bin/checkpoint --output=/tmp/sleep.ckpt <pid-of-lxc-init> > > $ lxc-unfreeze --name foo > > $ lxc-stop --name foo > > 4. Restart a checkpointed LXC container > > $ ./lxc_restart --statefile /tmp/sleep.ckpt --name bar > > # Test some common lxc commands after restart > > $ lxc-ps --name "bar/1" > CONTAINER PID TTY TIME CMD > bar/1 8511 ? 00:00:00 lxc-init > bar/1 8512 ? 00:00:00 sleep > > $ lxc-freeze --name "bar/1" > > $ grep State /proc/8511/status > State: D (disk sleep) > > $ grep State /proc/8512/status > State: D (disk sleep) > > NOTE: For some reason, the container name after restart is "bar/1" > instead of "bar". Due to this, when the lxc_restart is > exiting, I get a "-EBUSY - failed to remove "/cgroup/bar" > error. I need to fix this still. > _______________________________________________ Containers mailing list [email protected] https://lists.linux-foundation.org/mailman/listinfo/containers _______________________________________________ Devel mailing list [email protected] https://openvz.org/mailman/listinfo/devel
