The VM has now had the problem recur again with the monitoring showing
that just before it stops functioning nothing appears to be
odd/excessive with the network usage.
As such, I may have mis-titled my bug as I had assumed it was heavy load
causing the issue.
One thing which struck me as
Since I have put monitoring in place it would appear that I haven't had
the issue again in 3 days.
This is rather frustrating as it was happening every night.
I'm going to dial back on some of the monitoring in case this was
prompting it to stay alive unexpectedly (as I don't think the option of
I didn't manage to force the network to drop out by simply running
iperf3.
Had it running most of the day doing approx 2-3gbps traffic constantly.
The issue is still persisting though, so there must be something going
on.
I have now set some simple scripts which monitor packets per second and
1) It seems to happen every night (which is when the Ceph cluster is
most used). Not sure if it's at a specific time or whether anything else
could be interacting with it - I'll see if I can narrow this down. I'm
trying to run some tests to see whether I can force it to happen by
throwing a lot of
I am not experiencing this issue on my other virtualised Ceph instance.
The guest of the instance is 17.04 much like the other one, but the host
is 16.04.2 LTS on 4.4.0-75-generic.
No idea if it is just coincidence that it's not failing.
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Public bug reported:
Much as described in bug 1325560 I am experiencing issues with a KVM
guest losing network connectivity when under load.
I have a KVM host running Ubuntu 17.04 with linux-
image-4.10.0-22-generic (currently in zesty-proposed) installed.
On top of this I have a guest also
Getting the same here on 17.04 host with 17.04 guest.
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https://bugs.launchpad.net/bugs/1325560
Title:
kvm virtio netdevs lose network connectivity under "enough" load
To manage
I just performed much the same upgrade on my second KVM host and the
networking issue didn't happen again.
** Changed in: qemu (Ubuntu)
Status: New => Invalid
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OK, so all appears to be working now. No idea which of the many actions
I performed whilst trying to get the server back up and running actually
fixed it, but I'm now back at 10.5 after having tried to downgrade to
10.4 (where it still didn't seem to be working).
No idea if I rebooted after the
There were a range of packages installed at the same time - I'm assuming
it's the QEMU/KVM ones which have caused the issue, but for the sake of
completeness the upgrades which happened were as follows:
snap-confine:amd64 (1.0.38-0ubuntu0.16.04.8, 1.0.38-0ubuntu0.16.04.10),
qemu-system-x86:amd64
Public bug reported:
Since upgrading from qemu 1:2.5+dfsg-5ubuntu10.4 to 1:2.5+dfsg-
5ubuntu10.5 the bridged network adapter no longer functions.
I built a fresh server 2012 R2 VM on 10.5. I could see the adapter and
set it's IP etc, but no traffic passed through it. Migrating the machine
to a
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