[Bug 1737866] Re: Too many open files when large number of routers on a host

[James Page]

I've uploaded fixes to bionic; will do SRU's for Xenial->Artful once
that's into the release pocket and the current 2.8.1 ovs stable release
is through.

** Changed in: openvswitch (Ubuntu Bionic)
       Status: Triaged => Fix Committed

-- 
You received this bug notification because you are a member of Ubuntu
OpenStack, which is subscribed to openvswitch in Ubuntu.
https://bugs.launchpad.net/bugs/1737866

Title:
  Too many open files when large number of routers on a host

Status in OpenStack neutron-openvswitch charm:
  Invalid
Status in openvswitch package in Ubuntu:
  Fix Committed
Status in openvswitch source package in Xenial:
  Triaged
Status in openvswitch source package in Artful:
  Triaged
Status in openvswitch source package in Bionic:
  Fix Committed

Bug description:
  When there are a large number of routers and dhcp agents on a host, we
  see a syslog error repeated:

  "hostname ovs-vswitchd: ovs|1762125|netlink_socket|ERR|fcntl: Too many
  open files"

  If I check the number of filehandles owned by the pid for "ovs-
  vswitchd unix:/var/run/openvswitch/db.sock" I see close to/at 65535
  files.

  If I then run the following, we double the limit and (in our case) saw
  the count rise to >80000:

  prlimit -p $pid --nofile=131070

  We need to be able to:
  - monitor via nrpe, if the process is running short on filehandles
  - configure the limit so we have the option to not run out.

  Currently, if I restart the process, we'll lose this setting.

  Needless to say, openvswitch running out of filehandles causes all
  manner of problems for services which use it.

To manage notifications about this bug go to:
https://bugs.launchpad.net/charm-neutron-openvswitch/+bug/1737866/+subscriptions