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)
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