On 09/13/2012 05:22 PM, Christian Seiler wrote: > This patch adds a simple notification system that allows the container to > notify the host (in particular, the lxc-start process) that the boot process > has been completed successfully. It also adds an additional status BOOTING > that lxc-info may return. This allows the administrator and scripts to > distinguish between a fully-running container and a container that is still > in the process of booting.
The feature sounds reasonable. > If nothing is added to the configuration file, the current behavior is not > changed, i.e. after lxc-start finishes the initialization, the container is > immediately put into the RUNNING state. This ensures backwards > compatibility. > > If lxc.notification.type is set to 'fifo', after lxc-start initialization > the container is initially put into the state BOOTING. Also, the FIFO > /var/lib/lxc/%s/notification-fifo is created and bind-mounted into the > container, by default to /dev/lxc-notify, but this can be changed via the > lxc.notification.path configuration setting. It is a bit weird to bind mount this fifo. Furthermore, I would suggest to prevent using a fifo it is prone to problems and could hang the supervisor process (aka lxc-start). Maybe here a simple file in the rootfs let's say rootfs/var/run/lxc-notify would be sufficient. >From lxc-start monitor this file and when it is created or modified or whatever, the system running the container is booted. I suggest to decorrelate the states sent by lxc-start to lxc-info and so from this notification mechanism. > Inside the container one may execute 'echo RUNNING > /dev/lxc-notify' or an > equivalent command to notify lxc-start that the container has now booted. > Similarly, 'echo STOPPING > /dev/lxc-notify' will change the status to > STOPPING, which may be done on shutdown. Currently, only RUNNING and > STOPPING are allowed, other states are ignored. How the process writing the "STOPPING" string can know the container is shutting down ? Thanks -- Daniel ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://ad.doubleclick.net/clk;258768047;13503038;j? http://info.appdynamics.com/FreeJavaPerformanceDownload.html _______________________________________________ Lxc-devel mailing list Lxc-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lxc-devel