df command does not calculate the usage of bind mounts and tmpfs on RHEHV
Issue
- On RHEV hypervisor version 20140121.0.el6ev, df does not report all file systems correctly:
# df -ah
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/live-rw 1.5G 464M 1.1G 31% /
/dev/mapper/HostVG-Config 7.8M 1.3M 6.1M 18% /config
none 0 0 0 - /proc/sys/fs/binfmt_misc
tmpfs 127G 96K 127G 1% /dev/shm
/data/images 132G 404M 125G 1% /var/lib/libvirt/images
/data/core 132G 404M 125G 1% /var/log/core
sunrpc 0 0 0 - /var/lib/nfs/rpc_pipefs
rhevm.example.com:/data/iso 662G 166G 463G 27% /rhev/data-center/mnt/rhevm.example.com:_data_iso
rhevm.example.com:/export/DWI_Export 662G 166G 463G 27% /rhev/data-center/mnt/rhevm.example.com:_export_DWI__Export
- And if you specify a file system, such as /var/log, which is not listed in df -h, you get the actual information:
# df -h /var/log/
Filesystem Size Used Avail Use% Mounted on
- 2.0G 401M 1.5G 21% /var/log
Environment
- Red Hat Enterprise Virtualization 3.2
- RHEVH (20140121.0.el6ev)
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