vhostmd

vhostmd (the Virtual Host Metrics Daemon) allows virtual machines to see limited information about the host they are running on.

In the host, a daemon (vhostmd) runs which creates metrics periodically into a disk image. This disk image is exported read-only to guests. Guests can read the disk image to see metrics. Simple synchronization stops guests from seeing out of date or corrupt metrics.

The system administrator chooses which metrics the guests can see, and also which guests get to see the metrics at all. The daemon is very configurable, and it is easy to add new metrics, or remove ones that you don’t want the guest to see.

There is a small library for accessing metrics (libmetrics) and a tool to dump them in the guest (vm-dump-metrics). Or programs can access the metrics disk directly.

vhostmd was written by Pat Cambell and Jim Fehlig, with some modifications by Richard W.M. Jones.

Community and mailing list

To subscribe to the mailing list send a message with the body subscribe to vhostmd+subscribe at opensuse . org

There is also an IRC channel, #virt on OFTC.

Downloads

Latest version is 0.4 available as source from here.

vhostmd is available in SuSE.
Fedora: coming soon (Red Hat Bugzilla #517488).
Debian: Debian bug 550118.
Ubuntu: coming soon.

For source, please see the git repository on this site.

License

The software license is GNU LGPL 2.1 or above.