| Mounts--bind, issue or limitation? [message #12665] |
Sun, 06 May 2007 22:11  |
3molo
Messages: 13
Registered: April 2007
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Junior Member |
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Hey.
Got 2x 500GB IDE disks, using dmcrypted (sha256) ext3 filesystem.
Mounted as /data1 & /data2 on the HN, tne mount --bind into /vz/root/VEID/. After a short period of time, the owners of the VPS in which I have mount bind into started
to do alot of mount binds because glftpd has a hard time with symlinks(or something).
This resulted in me not being able to use the disks at all on the hardware node. Output of mount and df below:
Since I rather not interfer unless I have to, I wonder if this is some limitation of mount or if this is OpenVZ related.
hardwarenode:~# df -h
/dev/mapper/dataone 250M 97M 140M 41% /data1
/dev/mapper/datatwo 250M 97M 140M 41% /data2
hardwarenode:~# mount
/dev/mapper/dataone on /data1 type ext3 (rw)
/dev/mapper/datatwo on /data2 type ext3 (rw)
/data1/somename on /vz/root/105/site/dataone type none (rw,bind)
/data2/somename on /vz/root/105/site/datatwo type none (rw,bind)
hardwarenode:~# vzctl enter 105
entered into VE 105
somevps:/# mount
simfs on / type simfs (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw)
tmpfs on /dev/shm type tmpfs (rw)
ext3 on /site/dataone type ext3 (rw,data=ordered)
ext3 on /site/datatwo type ext3 (rw,data=ordered)
ext3 on /site/dataone/ftpd/ftp/site/1 type ext3 (rw,data=ordered)
ext3 on /site/dataone/ftpd/ftp/site/2 type ext3 (rw,data=ordered)
ext3 on /site/dataone/ftpd/ftp/site/3 type ext3 (rw,data=ordered)
ext3 on /site/dataone/ftpd/ftp/site/4 type ext3 (rw,data=ordered)
ext3 on /site/dataone/ftpd/ftp/site/5 type ext3 (rw,data=ordered)
ext3 on /site/dataone/ftpd/ftp/site/6 type ext3 (rw,data=ordered)
somevps:/# df -h
Filesystem Size Used Avail Use% Mounted on
simfs 1.9G 356M 1.6G 19% /
tmpfs 1012M 0 1012M 0% /dev/shm
ext3 459G 29G 407G 7% /site/dataone
ext3 459G 8.2G 428G 2% /site/datatwo
ext3 459G 8.2G 428G 2% /site/dataone/ftpd/ftp/site/1
ext3 459G 8.2G 428G 2% /site/dataone/ftpd/ftp/site/2
ext3 459G 8.2G 428G 2% /site/dataone/ftpd/ftp/site/3
ext3 459G 8.2G 428G 2% /site/dataone/ftpd/ftp/site/4
ext3 459G 8.2G 428G 2% /site/dataone/ftpd/ftp/site/5
ext3 459G 8.2G 428G 2% /site/dataone/ftpd/ftp/site/6
Thanks in advance,
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| Re: Mounts--bind, issue or limitation? [message #12671 is a reply to message #12665] |
Mon, 07 May 2007 07:07  |
Vasily Tarasov
Messages: 1345
Registered: January 2006
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Senior Member |
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Hello,
I want to clear up some ambiguities:
1. You wrote, that you had two 500GB disk drives, but df on HN outputs:
hardwarenode:~# df -h
/dev/mapper/dataone 250M 97M 140M 41% /data1
/dev/mapper/datatwo 250M 97M 140M 41% /data2
2. Why in VE df outputs other size (other then 250M) of filesystems on /dataone /datatwo partions:
somevps:/# df -h
...
ext3 459G 29G 407G 7% /site/dataone
ext3 459G 8.2G 428G 2% /site/datatwo
...
3. In VE mount command outputs:
....
ext3 on /site/dataone type ext3 (rw,data=ordered)
ext3 on /site/datatwo type ext3 (rw,data=ordered)
ext3 on /site/dataone/ftpd/ftp/site/1 type ext3 (rw,data=ordered)
ext3 on /site/dataone/ftpd/ftp/site/2 type ext3 (rw,data=ordered)
ext3 on /site/dataone/ftpd/ftp/site/3 type ext3 (rw,data=ordered)
ext3 on /site/dataone/ftpd/ftp/site/4 type ext3 (rw,data=ordered)
ext3 on /site/dataone/ftpd/ftp/site/5 type ext3 (rw,data=ordered)
ext3 on /site/dataone/ftpd/ftp/site/6 type ext3 (rw,data=ordered)
4. The last but probably the most important. You wrote, that "This resulted in me not being able to use the disks at all on the hardware node". What does that mean? How exactly you can't use your drives? Can you post here exact commands that fail to work?
Thank you,
Vasily
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| Re: Mounts--bind, issue or limitation? [message #12686 is a reply to message #12671] |
Mon, 07 May 2007 11:28 |
3molo
Messages: 13
Registered: April 2007
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Junior Member |
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On the hardware node the disks was usable and I could see their capacity with df. Now df claims them to be 250MB filesystems which is NOT the case. ls shows me nothing, although these are the very disks that are mount binded into the vps. How and why, I dont know. It's a very weird situation. There can be nothing Im reading wrong, since I have one 18gb scsi + 9gb scsi + 2x 500 gb ide disks. Also they worked on the HN when I first mounted them, then I discovered the missinformation you can see below, and of course the many mounts. The mount binds the owner of the vps did was from(inside his VE) /site/dataone/{1,2,3} + /site/datatwo/{4,5,6} into /site/dataone/ftpd/ftp/site/.
Clearly not true information here:
hardwarenode:~# df -h
/dev/mapper/dataone 250M 97M 140M 41% /data1
/dev/mapper/datatwo 250M 97M 140M 41% /data2
hardwarenode:~# mount
/dev/mapper/dataone on /data1 type ext3 (rw)
/dev/mapper/datatwo on /data2 type ext3 (rw)
/data1/midimiliz on /vz/root/105/site/dataone type none (rw,bind)
/data2/midimiliz on /vz/root/105/site/datatwo type none (rw,bind)
hardwarenode:~# ls -la /data{1,2}
/data1:
total 2
drwxr-xr-x 2 root root 1024 2007-04-27 14:16 .
drwxr-xr-x 25 root root 1024 2007-04-27 14:40 ..
/data2:
total 2
drwxr-xr-x 2 root root 1024 2007-04-18 13:04 .
drwxr-xr-x 25 root root 1024 2007-04-27 14:40 ..
hardwarenode:~# du -sh /vz/root/105/site/data{one,two}
37G /vz/root/105/site/dataone
8.0G /vz/root/105/site/datatwo
somevps:~# df -h
ext3 459G 29G 407G 7% /site/dataone
ext3 459G 8.2G 428G 2% /site/datatwo
So only way for me to read or seek the disks on th HN is by using the mount point /vz/root/105/site/data{one,two}. Im pretty sure that without the many mount binds inside the vps, there would be no problem. But I would really like to know why and what to do before umounting their structure!
Hope I made the problem more clear
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