[systemd-devel] /dev or /tmp disappears when program is running
Steven Shiau
steven at nchc.org.tw
Tue Sep 8 05:45:51 PDT 2015
Dear systemd developers,
I encountered a very weird issue, i.e. the /dev or /tmp disappears when
program is running.
The client system is nfsroot (diskless), running on the Debian Sid with
Linux kernel 4.1.0-2-amd64. The PXE/NFS server is a Debian Live system
running NFS server by unfs3 [1], its mounting status is attached as
"server-table.txt", and the client's initial mounting status is attached
as "client-table.txt". You can see /dev/ is mounted as devtmpfs. This is
quite normal.
When a system deployment program (clonezilla [2]) is run in the diskless
client machine, suddenly the /dev/ is gone, as shown in the attached
file "client-table-dev-missing.txt". You can see "/dev/" is missing. To
narrow down the issue, I have switched to sysvinit, but still use
systemd-udevd on this Debian Sid system.
I am sure systemd-udevd is running:
(live)root at debian-192-168-7-1:~# ps -ef |grep udev |grep -v grep
root 1190 1 0 11:31 ? 00:00:01
/lib/systemd/systemd-udevd --daemon
and its version is 225:
# /lib/systemd/systemd-udevd --version
225
However, the /dev still disappears. On different virtual machines,
sometimes it's /tmp (mounted with tmpfs) which disappears.
Could you please shed some light so that I can avoid this issue?
We have been working on solving this problem more than a week, but still
can not make it.
If you need more info, please let me know.
Thank you very much.
Steven.
[1] http://unfs3.sourceforge.net
[2] http://clonnezilla.org
--
Steven Shiau <steven _at_ stevenshiau org>
Public Key Server PGP Key ID: 4096R/47CF935C
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-------------- next part --------------
root at debian:~# df
Filesystem 1K-blocks Used Available Use% Mounted on
tmpfs 100392 560 99832 1% /run
/dev/sr0 566684 566684 0 100% /lib/live/mount/medium
/dev/loop0 525312 525312 0 100% /lib/live/mount/rootfs/filesystem.squashfs
tmpfs 501960 0 501960 0% /lib/live/mount/overlay
overlay 501960 72420 429540 15% /
tmpfs 5120 0 5120 0% /run/lock
devtmpfs 10240 0 10240 0% /dev
tmpfs 200780 0 200780 0% /run/shm
tmpfs 501960 8 501952 1% /tmp
cgroup 12 0 12 0% /sys/fs/cgroup
cgmfs 100 0 100 0% /run/cgmanager/fs
192.168.120.254:/home/partimag 1856259072 45424640 1716518912 3% /home/partimag
root at debian:~# mount
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=100392k,mode=755)
/dev/sr0 on /lib/live/mount/medium type iso9660 (ro,noatime)
/dev/loop0 on /lib/live/mount/rootfs/filesystem.squashfs type squashfs (ro,noatime)
tmpfs on /lib/live/mount/overlay type tmpfs (rw,relatime)
overlay on / type overlay (rw,noatime,lowerdir=//filesystem.squashfs/,upperdir=/live/overlay//rw,workdir=/live/overlay//work)
tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k)
pstore on /sys/fs/pstore type pstore (rw,relatime)
devtmpfs on /dev type devtmpfs (rw,relatime,size=10240k,nr_inodes=121938,mode=755)
tmpfs on /run/shm type tmpfs (rw,nosuid,nodev,noexec,relatime,size=200780k)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
fusectl on /sys/fs/fuse/connections type fusectl (rw,relatime)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,relatime)
cgroup on /sys/fs/cgroup type tmpfs (rw,relatime,size=12k,mode=755)
cgmfs on /run/cgmanager/fs type tmpfs (rw,relatime,size=100k,mode=755)
192.168.120.254:/home/partimag on /home/partimag type nfs4 (rw,relatime,vers=4.0,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=192.168.120.3,local_lock=none,addr=192.168.120.254)
rpc_pipefs on /run/rpc_pipefs type rpc_pipefs (rw,relatime)
-------------- next part --------------
(live)root at debian-192-168-7-1:~# df
Filesystem 1K-blocks Used Available Use% Mounted on
192.168.7.254:/tftpboot/node_root 502272 72704 429568 15% /
devtmpfs 10240 0 10240 0% /dev
tmpfs 100392 440 99952 1% /run
none 501960 12 501948 1% /root
none 501960 5084 496876 2% /etc
none 501960 12216 489744 3% /var
192.168.7.254:/usr 502272 72704 429568 15% /usr
tmpfs 5120 0 5120 0% /run/lock
tmpfs 200780 0 200780 0% /run/shm
tmpfs 501960 8 501952 1% /tmp
tmpfs 501960 0 501960 0% /media
tmpfs 501960 0 501960 0% /mnt
192.168.7.254:/home 502272 72704 429568 15% /home
192.168.7.254:/home/partimag 1856259072 45424640 1716518912 3% /home/partimag
(live)root at debian-192-168-7-1:~# mount
192.168.7.254:/tftpboot/node_root on / type nfs (rw,relatime,vers=3,rsize=524288,wsize=524288,namlen=255,hard,nolock,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.7.254,mountvers=3,mountport=2049,mountproto=tcp,local_lock=all,addr=192.168.7.254)
none on /proc type proc (rw,nosuid,nodev,noexec,relatime)
devtmpfs on /dev type devtmpfs (rw,relatime,size=10240k,nr_inodes=123336,mode=755)
none on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=100392k,mode=755)
none on /root type tmpfs (rw,relatime,mode=700)
none on /etc type tmpfs (rw,relatime,mode=755)
none on /var type tmpfs (rw,relatime,mode=755)
192.168.7.254:/usr on /usr type nfs (ro,relatime,vers=3,rsize=524288,wsize=524288,namlen=255,hard,nolock,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.7.254,mountvers=3,mountport=2049,mountproto=tcp,local_lock=all,addr=192.168.7.254)
tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k)
pstore on /sys/fs/pstore type pstore (rw,relatime)
tmpfs on /run/shm type tmpfs (rw,nosuid,nodev,noexec,relatime,size=200780k)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,relatime)
tmpfs on /media type tmpfs (rw,relatime)
tmpfs on /mnt type tmpfs (rw,relatime)
rpc_pipefs on /run/rpc_pipefs type rpc_pipefs (rw,relatime)
192.168.7.254:/home on /home type nfs (rw,relatime,vers=3,rsize=524288,wsize=524288,namlen=255,hard,nolock,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.7.254,mountvers=3,mountport=2049,mountproto=tcp,local_lock=all,addr=192.168.7.254)
192.168.7.254:/home/partimag on /home/partimag type nfs (rw,relatime,vers=3,rsize=524288,wsize=524288,namlen=255,hard,nolock,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.7.254,mountvers=3,mountport=2049,mountproto=tcp,local_lock=all,addr=192.168.7.254)
-------------- next part --------------
(live)root at debian-192-168-7-1:~# df
Filesystem 1K-blocks Used Available Use% Mounted on
192.168.7.254:/tftpboot/node_root 502272 72704 429568 15% /
tmpfs 100392 440 99952 1% /run
none 501960 12 501948 1% /root
none 501960 5084 496876 2% /etc
none 501960 12216 489744 3% /var
192.168.7.254:/usr 502272 72704 429568 15% /usr
tmpfs 5120 0 5120 0% /run/lock
tmpfs 200780 0 200780 0% /run/shm
tmpfs 501960 8 501952 1% /tmp
tmpfs 501960 0 501960 0% /media
tmpfs 501960 0 501960 0% /mnt
192.168.7.254:/home 502272 72704 429568 15% /home
192.168.7.254:/home/partimag 1856259072 45424640 1716518912 3% /home/partimag
(live)root at debian-192-168-7-1:~# mount
192.168.7.254:/tftpboot/node_root on / type nfs (rw,relatime,vers=3,rsize=524288,wsize=524288,namlen=255,hard,nolock,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.7.254,mountvers=3,mountport=2049,mountproto=tcp,local_lock=all,addr=192.168.7.254)
none on /proc type proc (rw,nosuid,nodev,noexec,relatime)
none on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=100392k,mode=755)
none on /root type tmpfs (rw,relatime,mode=700)
none on /etc type tmpfs (rw,relatime,mode=755)
none on /var type tmpfs (rw,relatime,mode=755)
192.168.7.254:/usr on /usr type nfs (ro,relatime,vers=3,rsize=524288,wsize=524288,namlen=255,hard,nolock,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.7.254,mountvers=3,mountport=2049,mountproto=tcp,local_lock=all,addr=192.168.7.254)
tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k)
pstore on /sys/fs/pstore type pstore (rw,relatime)
tmpfs on /run/shm type tmpfs (rw,nosuid,nodev,noexec,relatime,size=200780k)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,relatime)
tmpfs on /media type tmpfs (rw,relatime)
tmpfs on /mnt type tmpfs (rw,relatime)
rpc_pipefs on /run/rpc_pipefs type rpc_pipefs (rw,relatime)
192.168.7.254:/home on /home type nfs (rw,relatime,vers=3,rsize=524288,wsize=524288,namlen=255,hard,nolock,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.7.254,mountvers=3,mountport=2049,mountproto=tcp,local_lock=all,addr=192.168.7.254)
192.168.7.254:/home/partimag on /home/partimag type nfs (rw,relatime,vers=3,rsize=524288,wsize=524288,namlen=255,hard,nolock,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.7.254,mountvers=3,mountport=2049,mountproto=tcp,local_lock=all,addr=192.168.7.254)
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