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[Slawek Kaplonski <1835044@xxxxxxxxxxxxxxxxxx>]

** Changed in: neutron
       Status: In Progress => Won't Fix

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Title:
  [Queens] Memory leak in pyroute2 0.4.21

Status in neutron:
  Won't Fix

Bug description:
  Description of problem:
  Memory leak in privsep-helper(neutron agents) when create/destroy action are executed.

  Version-Release number of selected component (if applicable):

  How reproducible:
  Queens is affected

  Steps to Reproduce:
  1. Deploy Queens
  2.create the next scripts:
  (overcloud) [stack@undercloud-0 ~]$ cat create2.sh
  set -x

  ips=(0 10.0.0.215 10.0.0.249 10.0.0.223 10.0.0.222 10.0.0.218 10.0.0.247 10.0.0.210 10.0.0.220 10.0.0.246 10.0.0.213 10.0.0.224 10.0.0.212 10.0.0.217 10.0.0.221 10.0.0.216)
  ips=(0 10.0.0.220 10.0.0.216 10.0.0.235 10.0.0.232 10.0.0.245 10.0.0.226 10.0.0.217 10.0.0.211 10.0.0.221 10.0.0.230 10.0.0.248 10.0.0.228 10.0.0.223 10.0.0.212 10.0.0.225)
  openstack network create net_$1
  openstack subnet create --network net_$1  --dns-nameserver 10.0.0.1 --gateway 10.$1.0.1  --subnet-range 10.$1.0.0/16 net_$1
  openstack router create router_$1
  openstack router add subnet router_$1 net_$1
  #openstack router set router_$1 --external-gateway public

  #openstack server create --flavor cirros --image cirros   --nic net-
  id=net$1 --security-group test --key-name mykey vm$1

  #openstack server add floating ip vm$1 ${ips[$1]}

  #ping ${ips[$1]} -c 10
  (overcloud) [stack@undercloud-0 ~]$ cat delete2.sh

  #openstack server delete vm$1
  openstack router remove subnet router_$1 net_$1
  openstack network delete net_$1
  openstack router delete router_$1

  3. Execute:

  for j in $(seq 1 10); do for i in  $(seq 1 10) ; do ./create2.sh $i ;
  done ; for i in  $(seq 1 10) ; do ./delete2.sh $i ; done ;echo
  "####LOOP $j ####" ;done

  Chech the memory usage of the privsep-helper in the controllers:

  [root@controller-1 heat-admin]# top -c -p 125052 -p 278912

  top - 22:37:22 up 9 days,  4:59,  1 user,  load average: 4.45, 3.71, 3.77
  Tasks:   2 total,   0 running,   2 sleeping,   0 stopped,   0 zombie
  %Cpu(s): 19.8 us,  4.1 sy,  0.0 ni, 75.2 id,  0.0 wa,  0.0 hi,  0.8 si,  0.0 st
  KiB Mem : 32779936 total,  3150768 free, 16209200 used, 13419968 buff/cache
  KiB Swap:        0 total,        0 free,        0 used. 15146444 avail Mem

      PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
   125052 root      20   0 2497576   2.2g   2468 S   0.0  7.2  76:06.44 /usr/bin/python2 /bin/privsep-helper --config-file /usr/share/neutron/neutron-dist.conf --config-file /etc/neutron/neutron.conf --config-fi+
   278912 root      20   0 1048908 897004   2468 S   0.0  2.7  13:55.34 /usr/bin/python2 /bin/privsep-helper --config-file /usr/share/neutron/neutron-dist.conf --config-file /etc/neutron/neutron.conf --config-fi+

  The important colunm is RES

  Actual results:

  Memory usage increases in every loop.

  Expected results:

  Memory usage should be stable

  Additional info:

  Leak is in pyroute2--> necessary update version to 0.5.2.x

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