Ferenc Wagner wrote: > Hi, > > While playing with lxc-start, I noticed that /tmp is infested by empty > lxc-r* directories: > > # lxc-start --logfile=/tmp/startlog --logpriority=DEBUG -n jail -s > lxc.mount.entry="/ /tmp/jail none bind 0 0" -s lxc.rootfs=/tmp/jail -s > lxc.pivotdir=/mnt ls /proc > # cat /tmp/startlog > lxc-start 1273064291.740 DEBUG lxc_start - sigchild handler set > lxc-start 1273064291.740 INFO lxc_start - 'jail' is initialized > lxc-start 1273064291.745 DEBUG lxc_cgroup - using cgroup mounted at > '/cgroup' > lxc-start 1273064291.745 DEBUG lxc_cgroup - '/cgroup/3178' renamed > to '/cgroup/jail' > lxc-start 1273064291.746 DEBUG lxc_conf - mounted / on /tmp/jail, > type none > lxc-start 1273064291.746 INFO lxc_conf - mount points have been > setup > lxc-start 1273064291.746 WARN lxc_conf - rootfs specified but no > console found > lxc-start 1273064291.746 INFO lxc_conf - 0 tty(s) has been setup > lxc-start 1273064291.746 DEBUG lxc_conf - temporary mountpoint for > old rootfs is './mnt' > lxc-start 1273064291.746 DEBUG lxc_conf - pivot_root syscall to > '/mnt' successful > lxc-start 1273064291.746 DEBUG lxc_conf - umounted '/mnt/dev/pts' > lxc-start 1273064291.746 DEBUG lxc_conf - umounted '/mnt/dev/shm' > lxc-start 1273064291.746 DEBUG lxc_conf - umounted '/mnt/sys' > lxc-start 1273064291.746 DEBUG lxc_conf - umounted '/mnt/proc' > lxc-start 1273064291.747 DEBUG lxc_conf - umounted '/mnt/lib/init/rw' > lxc-start 1273064291.747 DEBUG lxc_conf - umounted '/mnt/var/run' > lxc-start 1273064291.747 DEBUG lxc_conf - umounted '/mnt/var/lock' > lxc-start 1273064291.747 DEBUG lxc_conf - umounted '/mnt/cgroup' > lxc-start 1273064291.747 DEBUG lxc_conf - umounted '/mnt/tmp/jail' > lxc-start 1273064291.747 DEBUG lxc_conf - umounted '/mnt/dev' > lxc-start 1273064291.747 DEBUG lxc_conf - umounted '/mnt/tmp' > lxc-start 1273064291.747 DEBUG lxc_conf - umounted '/mnt' > lxc-start 1273064291.747 INFO lxc_conf - pivoted to > '/tmp/lxc-rX4K9le' > lxc-start 1273064291.748 DEBUG lxc_conf - capabilities has been setup > lxc-start 1273064291.748 NOTICE lxc_conf - 'jail' is setup. > lxc-start 1273064291.748 NOTICE lxc_start - exec'ing 'ls' > lxc-start 1273064291.753 NOTICE lxc_start - 'ls' started with pid > '3178' > lxc-start 1273064291.753 INFO lxc_console - no console specified > lxc-start 1273064291.753 WARN lxc_utmp - '/tmp/jail/var/run/utmp' > not found > lxc-start 1273064291.763 DEBUG lxc_start - child exited > lxc-start 1273064291.763 DEBUG lxc_cgroup - using cgroup mounted at > '/cgroup' > lxc-start 1273064291.764 DEBUG lxc_cgroup - '/cgroup/jail' unlinked > > And /tmp/lxc-rX4K9le is left behind... Ok, this name comes from > lxc-rootfs in conf.c:setup_rootfs. After setup_rootfs_pivot_root > returns, the original /tmp is not available anymore, so rmdir(tmpname) > at the bottom of setup_rootfs can't achieve much. Why is this temporary > name needed anyway? Is pivoting impossible without it? I can't see why. > That was put in place with chroot, before pivot_root, so the distro's scripts can remount their '/' without failing.
Now we have pivot_root, I suppose we can change that to something cleaner... ------------------------------------------------------------------------------ _______________________________________________ Lxc-users mailing list Lxc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lxc-users