Hi!
> With a group of college buddies, we are evaluating the possibility of
> initiating a project to develop a management panel of KVM virtual
> machines. The idea is to do something similar to OpenXenManager but for
> KVM.
At out university we developed a Perl-based management tool named
"kvm-top". This tool is command-line only, not offering any GUI at
the moment. The initial idea of that tool was to make the start-up of
VMs easier than doing it manually. The tool analyzes a VM-specific
config file like
GUEST_ID=219
GUEST_NAME=attic
.
.
defining all parameters for starting up a VM. For actually starting
this VM, a single command now is sufficient:
asok01 ~ # kvm-top -start attic
This will not only start-up the VM "attic", but also check if this VM
is running on some other cluster node and connect to the iSCSI target
if required.
Meanwhile, the tool has evolved, not only consisting of the "kvm-top"
tool, but also a server component named "kvm-ctld" running on each
cluster node. The "kvm-top" tool connects to the "kvm-ctld" running
on the local host, executing the desired command. At this, the
command does not nessecarily have to be executed on the same cluster
node. For instance, it is easily possible to start/stop a VM running
on a different cluster node.
However, the main feature of "kvm-top" is giving information about
the current status of the running VMs:
asok01 ~ # kvm-top
VM NODE AS 5s 30s USER PID #CPU MEM VNC SPICE #LAN
=====================================================================
attic asok02 4 4 root 6614 1 2048 36003 - 2
cbase asok08 1 1 root 10222 1 1048 36142 - 1
cbase-spice asok08 0 0 root 4269 1 1024 36143 5924 1
cloud-pj asok02 14 18 root 24071 1 1024 36001 - 2
.
.
.
where "5s" and "30s" contain the average system load over the last
5s resp. 30s. There are serveral ways of filtering or sorting the
output, e.g. sorting by cluster nodes:
asok01 ~ # kvm-top -s node
NODE VM AS 5s 30s USER PID #CPU MEM VNC SPICE #LAN
=====================================================================
asok01(ENABLED): 0(0) VMs, CPU=0%, MEM=2%, AGE 00:00
asok02(ENABLED): 7(8) VMs, CPU=13%, MEM=99%, AGE 00:05
attic 4 4 root 6614 1 2048 36003 - 2
cloud-pj 21 19 root 24071 1 1024 36001 - 2
.
.
The "kvm-top" tool even allows migration of VMs between the cluster
nodes. The following command would migrate the VM "attic" from the
currently used cluster node "asok02" to cluster node "asok07" (note:
the command has been executed on a different cluster node "asok01"):
asok01 ~ # kvm-top -migrate attic asok07
As I mentioned, the tool is command line only at the moment, however it
shouldn't be too difficult to create a web-based interface, since the
kvm-ctld allows communication not only with kvm-top. Connecting to the
port of kvm-ctld, it's pretty easy to get information about all
currently running VMs or start/stop/migrate VMs.
If there's interest in that tool, please let me know. I'll gladly
publish it.
Regards,
Matthias
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