[colug-432] fstab/mtab vs df - dummy FS?

[Rick Hornsby]

I’m not completely sure that there’s anything wrong operationally because
nothing else seems to be having any issues, but df (CentOS 7) is not
listing the …/pgsql/data filesystem. That suggests to me there's something
I misconfigured.

The fstab file (in part) has these entries, in this order:

/dev/mapper/vg00-lv_var /var xfs defaults 0 2
/dev/mapper/vg00-lv_satellite /var/satellite xfs defaults 0 2
/dev/mapper/vg00-lv_postgres /var/lib/pgsql/data xfs defaults 0 2

Mount shows the filesystems as expected

/dev/mapper/vg00-lv_var on /var type xfs
(rw,relatime,seclabel,attr2,inode64,noquota)
/dev/mapper/vg00-lv_postgres on /var/lib/pgsql/data type xfs
(rw,relatime,seclabel,attr2,inode64,noquota)
/dev/mapper/vg00-lv_satellite on /var/satellite type xfs
(rw,relatime,seclabel,attr2,inode64,noquota)

which matches what I’m seeing in /etc/mtab. df, however doesn’t show the
postgres filesystem:

$ df -h | grep var
/dev/mapper/vg00-lv_var        4.0G  1.4G  2.7G  34% /var
/dev/mapper/vg00-lv_satellite   88G   29G   60G  33% /var/satellite

What I’ve discovered since starting this post is that df thinks the
filesystem in question is a “dummy” (virtual? like /proc?) filesystem,  so
it is suppressing it in the normal output, but I have no idea why it thinks
that in the first place.

$ df -ah | grep var
/dev/mapper/vg00-lv_var        4.0G  1.4G  2.7G  34% /var
/dev/mapper/vg00-lv_postgres      -     -     -    - /var/lib/pgsql/data
/dev/mapper/vg00-lv_satellite   88G   29G   60G  33% /var/satellite
sunrpc                            0     0     0    - /var/lib/nfs/rpc_pipefs

Any thoughts?

Thanks!
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.colug.net/pipermail/colug-432/attachments/20180912/c9a6554b/attachment.html