Colors of Noise

The libvirt munin plugins improved quiet a bit since their initial release:

• I added two more plugins:
  • libvirt-cputime: monitor cpu time used by virtual machines
  • libvirt-mem: monitor the amount of memory used by virtual machines
• these two plugins have adjustable limits for their warning and critical values, see the README for more details
• the plugins now work properly with Xen by special casing Domain-0
• they also ship as a Debian package

Here are two munin plugins that monitor disk and network I/O of virtual machines using libvirt. These are also two simple examples on using the libvirt python bindings. You need python-libvirt and python-libxml2 installed in order to use them. If you don't want to use the default uri, try:

[libvirt-*]
env.uri qemu:///system

Munin-node needs to have read access to libvirt's socket. This is the case in Debian's default installation.