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Currently if /tmp does not exist, CRIU fails because it will not be able to create a temporary directory there. But when checkpointing and restoring containers, we cannot rely on the existence of /tmp. For such containers, we should use root (/). The temporary directory will be removed after CRIU is done. Signed-off-by: Saied Kazemi <saied@google.com> Acked-by: Andrew Vagin <avagin@odin.com> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
criu ==== 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: http://criu.org/Installation * A simple example of usage: http://criu.org/Simple_loop * More sophisticated example with graphical app: http://criu.org/VNC