On Fri, Nov 6, 2015 at 12:19 PM, Jarry <mr.ja...@gmail.com> wrote: > Hi Gentoo-users, > > I noted one strange thing today: It seems one of my servers lost "/"! > > vs5-dns ~ # df > Filesystem 1K-blocks Used Available Use% Mounted on > /var/log/named 10138552 2223148 7377344 24% /chroot/dns/var/log/named > tmpfs 308196 420 307776 1% /run > dev 10240 0 10240 0% /dev > shm 1540968 0 1540968 0% /dev/shm > cgroup_root 10240 0 10240 0% /sys/fs/cgroup > none 1048576 0 1048576 0% /var/tmp/portage > > And it seems I found the thief who stole it: > > vs5-dns ~ # /etc/init.d/named stop > * Caching service dependencies ... [ ok ] > * Stopping chrooted named ... > * Umounting chroot dirs ... > * umounting /chroot/dns/etc/bind ... [ ok ] > * umounting /chroot/dns/var/log/named ... [ ok ] > * umounting /chroot/dns/var/bind ... [ ok ] > vs5-dns ~ # df > Filesystem 1K-blocks Used Available Use% Mounted on > /dev/sda2 10138552 2223140 7377352 24% / > tmpfs 308196 416 307780 1% /run > dev 10240 0 10240 0% /dev > shm 1540968 0 1540968 0% /dev/shm > cgroup_root 10240 0 10240 0% /sys/fs/cgroup > none 1048576 0 1048576 0% /var/tmp/portage > vs5-dns ~ # /etc/init.d/named start > * Starting chrooted named ... > * Mounting chroot dirs > * mounting /etc/bind to /chroot/dns/etc/bind [ ok ] > * mounting /var/bind to /chroot/dns/var/bind [ ok ] > * mounting /var/log/named to /chroot/dns/var/log/named [ ok ] > * Checking named configuration ... [ ok ] > vs5-dns ~ # df > Filesystem 1K-blocks Used Available Use% Mounted on > /var/log/named 10138552 2223160 7377332 24% /chroot/dns/var/log/named > tmpfs 308196 420 307776 1% /run > dev 10240 0 10240 0% /dev > shm 1540968 0 1540968 0% /dev/shm > cgroup_root 10240 0 10240 0% /sys/fs/cgroup > none 1048576 0 1048576 0% /var/tmp/portage > vs5-dns ~ # > > So it seems whenever chrooted bind/named is running, "/" simply > dissapeares from the list of mounted filesystem. Instead of it, > chrooted /var/log/named is listed. Is this correct behaviour??? > > This is a little problem for me, as I run monitoring software > which (appart from other things) check filesystems if they are > not close to being full. With bind/named running it complains > it can not find "/" in df output. I'd like to get my "/" back, > but I do not know how to do it...
Is your /etc/mtab a regular file, or is it a symlink to /proc/self/mounts? The latter is recommended. Anyway, please have a look at the contents of /etc/mtab, /proc/self/mounts, and proc/self/mountinfo while named is running and when it is stopped. If you pastebin them we can take a look for key differences.
