My team has seen a problem that could be related: in a churn test where
VMs are created and terminated at a constant rate - but so that the
number of active VMs should remain roughly constant - the size of the
host and addn_hosts files keeps increasing.
In other words, it appears that the config for VMs that have actually
been terminated is not being removed from the config file. Clearly, if
you have a limited pool of IP addresses, this can eventually lead to the
problem that you have described.
For your case - i.e. with Icehouse - the problem might be
https://bugs.launchpad.net/neutron/+bug/1192381. I'm not sure if the
fix for that problem - i.e. sending port-create and port-delete
notifications to DHCP agents even when the server thinks they are down -
was merged before the Icehouse release, or not.
But there must be at least one other cause as well, because my team was
seeing this with Juno-level code.
Therefore I, too, would be interested in any other insights about this
problem.
Regards,
Neil
On 08/06/15 16:26, Daniel Comnea wrote:
Any help, ideas please?
Thx,
Dani
On Mon, Jun 8, 2015 at 9:25 AM, Daniel Comnea <comnea.d...@gmail.com
<mailto:comnea.d...@gmail.com>> wrote:
+ Operators
Much thanks in advance,
Dani
On Sun, Jun 7, 2015 at 6:31 PM, Daniel Comnea <comnea.d...@gmail.com
<mailto:comnea.d...@gmail.com>> wrote:
Hi all,
I'm running IceHouse (build using Fuel 5.1.1) on Ubuntu where
dnsmask version 2.59-4.
I have a very basic network layout where i have a private net
which has 2 subnets
2fb7de9d-d6df-481f-acca-2f7860cffa60 | private-net
|
e79c3477-d3e5-471c-a728-8d881cf31bee 192.168.110.0/24
<http://192.168.110.0/24> |
|
| |
f48c3223-8507-455c-9c13-8b727ea5f441 192.168.111.0/24
<http://192.168.111.0/24> |
and i'm creating VMs via HEAT.
What is happening is that sometimes i get duplicated entries in
[1] and because of that the VM which was spun up doesn't get an ip.
The Dnsmask processes are running okay [2] and i can't see
anything special/ wrong in it.
Any idea why this is happening? Or are you aware of any bugs
around this area? Do you see a problems with having 2 subnets
mapped to 1 private-net?
Thanks,
Dani
[1]
/var/lib/neutron/dhcp/2fb7de9d-d6df-481f-acca-2f7860cffa60/addn_hosts
[2]
nobody 5664 1 0 Jun02 ? 00:00:08 dnsmasq
--no-hosts --no-resolv --strict-order --bind-interfaces
--interface=tapc9164734-0c --except-interface=lo
--pid-file=/var/lib/neutron/dhcp/2fb7de9d-d6df-481f-acca-2f7860cffa60/pid
--dhcp-hostsfile=/var/lib/neutron/dhcp/2fb7de9d-d6df-481f-acca-2f7860cffa60/host
--addn-hosts=/var/lib/neutron/dhcp/2fb7de9d-d6df-481f-acca-2f7860cffa60/addn_hosts
--dhcp-optsfile=/var/lib/neutron/dhcp/2fb7de9d-d6df-481f-acca-2f7860cffa60/opts
--leasefile-ro --dhcp-authoritative
--dhcp-range=set:tag0,192.168.110.0,static,86400s
--dhcp-range=set:tag1,192.168.111.0,static,86400s
--dhcp-lease-max=512 --conf-file= --server=10.0.0.31
--server=10.0.0.32 --domain=openstacklocal
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