[one-users] Strange guest behavior

[Manuel Peuster]

Hello,

I have installed a small test cloud on three nodes (OpenNebula 3.2, KVM, SSH transport). And everything works fine at first.

I am currently working on a deployment tool for complex appliances consisting of multiple VMs. For tests I simply use the ttylinux image from the documentation, because I can start many of this small machines on my little testbed at the same time. 

But after a couple of tests I have noticed some strange behavior at the guest machines: Normally they start fine, they are ping-able and I can connect via ssh. But after some time, lets say about 5-10 minutes, my VMs do not answer on pings anymore. 

At this point it often helps to use a VNC viewer to login into the VM. When this is done the VM normally answers on pings again. So it seems that the guest "sleeps" from time to time? 
After all it also happens that guests freeze completely and are not controllable anymore via ssh either via VNC. 

Is it possible that it is the fault of the ttyimage? (I've already checked hash sum, so my image is not broken)

I haven't found anything in the logfiles that helps me. 

Has anyone an idea?

Tanks a lot.

Regards
Manuel (Paderborn, Germany)