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Hi,

On wtorek, 29 czerwca 2021 16:08:38 CEST at wrote:
> Hi,
> 1. There is only one, bidirectional vpn connection between project networks 
in
> two regions 2. there is no (or almost no) traffic on this vpn link
> 3. second region is on one host (kolla all-in-one) and situation looks the
> same- with vpn service enabled there is excessive Memory use (growing also
> about 5-6MB/ minute and forcing the system to use swapfile)
> 
> there is no big cpu usage (ofcourse also due to no traffic inside VPN)
>  It's the same case even if there's no vpn connection configured.
> Best regards
> Adam Tomas
> Wysłane z iPhone'a
> 
> > Wiadomość napisana przez Vinh Nguyen Duc <vinhducnguyen1708 at gmail.com> w
> > dniu 29.06.2021, o godz. 11:04:
> > 
> > 
> > Hi Adam,
> > Do you think the VPN connection is use CPU and memory to encrypt the VPN
> > traffic?
> > 
> > On Mon, Jun 28, 2021 at 14:30 Adam Tomas <bkslash at poczta.onet.pl
> > <mailto:bkslash at poczta.onet.pl>> wrote: Hi,
> > I have problem with neutron vpnaas - after enabling vpnaas plugin 
everything
> > was ok at first. I was able to create VPN connection and communication is
> > correct. But after a week of running vpnaas (only one VPN connection
> > created/working!) I’ve noticed, that neutron-vpnaas takes more and more
> > memory. I have 5 processes on each controller (there should be always five?
> > Or it is changing dynamically?):
> > 
> > 42435    1545384  0.6  8.6 5802516 5712412 ?     S    Jun15 110:50
> > /var/lib/kolla/venv/bin/python3.8 /var/lib/kolla/venv/bin/neutron-server
> > --config-file /etc/neutron/neutron.conf --config-file
> > /etc/neutron/plugins/ml2/ml2_conf.ini --config-file
> > /etc/neutron/neutron_vpnaas.conf 42435    1545389  0.6  8.5 5735832 
5645856
> > ?     S    Jun15 112:16 /var/lib/kolla/venv/bin/python3.8
> > /var/lib/kolla/venv/bin/neutron-server --config-file
> > /etc/neutron/neutron.conf --config-file
> > /etc/neutron/plugins/ml2/ml2_conf.ini --config-file
> > /etc/neutron/neutron_vpnaas.conf 42435    1545378  0.5  8.5 5734192 
5643620
> > ?     S    Jun15 108:09 /var/lib/kolla/venv/bin/python3.8
> > /var/lib/kolla/venv/bin/neutron-server --config-file
> > /etc/neutron/neutron.conf --config-file
> > /etc/neutron/plugins/ml2/ml2_conf.ini --config-file
> > /etc/neutron/neutron_vpnaas.conf 42435    1545372  0.5  8.5 5731128 
5641436
> > ?     S    Jun15 109:07 /var/lib/kolla/venv/bin/python3.8
> > /var/lib/kolla/venv/bin/neutron-server --config-file
> > /etc/neutron/neutron.conf --config-file
> > /etc/neutron/plugins/ml2/ml2_conf.ini --config-file
> > /etc/neutron/neutron_vpnaas.conf 42435    1545369  0.6  8.4 5637084 
5547392
> > ?     S    Jun15 114:21 /var/lib/kolla/venv/bin/python3.8
> > /var/lib/kolla/venv/bin/neutron-server --config-file
> > /etc/neutron/neutron.conf --config-file
> > /etc/neutron/plugins/ml2/ml2_conf.ini --config-file
> > /etc/neutron/neutron_vpnaas.conf
> > 
> > now neutron_server takes over 27G of RAM on each controller:
> > 
> > neutron_server         running  10.2  27.2G
> > 
> > After stopping all neutron containers and starting it again neutron takes 
a
> > lot less memory:
> > 
> > neutron_server         running   0.5   583M
> > 
> > but memory usage keeps growing (about 5-6 M every minute).
> > What’s wrong? When I disable vpnaas globally there’s no problem with
> > excessive memory usage, so it’s vpnaas for sure…
> > 
> > Best regards
> > Adam Tomas

Please open Launchpad bug for that https://bugs.launchpad.net/neutron/+filebug 
- it will be easier to track it there.
Please include what versions are You using exactly and how to reproduce the 
issue.

-- 
Slawek Kaplonski
Principal Software Engineer
Red Hat
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