Description of problem:
Customer is reporting that their f5 vip is getting ~50G more traffic during a spike that occurs every 10 minutes. Looking at the pcaps, it appears all the traffic is, obviously, going to the api. 

Looking at the amount of nodes on the cluster, it appears there are over 800. 

A early observation was the output on the sosreport of the sdn. However, the sdn pods looked fine when I looked at them: 

"root      16910  0.0  0.0  13272  3044 ?        Ss   Jun17   1:45 /bin/bash -c #!/bin/bash set -euo pipefail  # cleanup old log files rm -f /var/log/openvswitch-old/ovsdb-server.log /var/log/openvswitch-old/ovs-vswitchd.log  mkdir -p /var/log/openvswitch  # if another process is listening on the cni-server socket, wait until it exits trap 'kill $(jobs -p); exit 0' TERM retries=0 while true; do   if 
 /usr/share/openvswitch/scripts/ovs-ctl status &>/dev/null; then     echo "warning: Another process is currently managing OVS, waiting 15s ..." 2>&1     sleep 15 & wait     (( retries += 1 ))   else     break   fi   if [[ "${retries}" -gt 40 ]]; then     echo "error: Another process is currently managing OVS, exiting" 2>&1     exit 1   fi done  # launch OVS function quit {     /usr/share/openvswitch/scripts/
 ovs-ctl stop     exit 0 } trap quit SIGTERM /usr/share/openvswitch/scripts/ovs-ctl start --no-ovs-vswitchd --system-id=random  # Restrict the number of pthreads ovs-vswitchd creates to reduce the # amount of RSS it uses on hosts with many cores # https://bugzilla.redhat.com/show_bug.cgi?id=1571379 # https://bugzilla.redhat.com/show_bug.cgi?id=1572797 if [[ `nproc` -gt 12 ]]; then     ovs-vsctl --no-wait 
 set Open_vSwitch . other_config:n-revalidator-threads=4     ovs-vsctl --no-wait set Open_vSwitch . other_config:n-handler-threads=10 fi /usr/share/openvswitch/scripts/ovs-ctl start --no-ovsdb-server --system-id=random  tail --follow=name /var/log/openvswitch/ovs-vswitchd.log /var/log/openvswitch/ovsdb-server.log & sleep 20 while true; do   if ! /usr/share/openvswitch/scripts/ovs-ctl status &>/dev/null; 
then     echo "OVS seems to have crashed, exiting"     quit   fi   sleep 15 done"

I have been trying to figure out what could be causing a spike every 10 minutes within a cluster, and cannot think of a process that reports every 10 minutes that would have this sort of impact. 

Looking for assistance on what to check next. I think this might be the consequence for the amount of nodes. What could be sending traffic to the API? 

Version-Release number of selected component (if applicable):
3.11

How reproducible:
I have not seen anything that would cause this in my looking 

Steps to Reproduce:
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Actual results:


Expected results:


Additional info: