this is a regression of https://bugzilla.redhat.com/show_bug.cgi?id=2087194

version:

ovn24.09-24.09.0-beta.26.el9fdp
[root@dell-per740-53 ls-lr]# ovn-nbctl set logical_router rtr options:snat-ct-zone=0
[root@dell-per740-53 ls-lr]# ovn-appctl ct-zone-list
0307b0bd-19de-4366-a285-78a695e0a291_snat 1
vm1 2
0307b0bd-19de-4366-a285-78a695e0a291_dnat 3
[root@dell-per740-53 ls-lr]# ovn-sbctl show
Chassis hv1
hostname: dell-per740-53.rhts.eng.pek2.redhat.com
Encap geneve
ip: "127.0.0.1"
options: {csum="true"}
Port_Binding vm1
[root@dell-per740-53 ls-lr]# ovn-nbctl lr-add rtr – set logical_router rtr options:chassis=hv1
ovn-nbctl: rtr: a router with this name already exists
[root@dell-per740-53 ls-lr]# ovn-nbctl set logical_router rtr options:chassis=hv1
[root@dell-per740-53 ls-lr]# ovn-appctl ct-zone-list
0275178c-a738-4620-8d07-f162c580e2d7_snat 0
rtr-ls 4
0307b0bd-19de-4366-a285-78a695e0a291_snat 1
vm1 2
ls-rtr 5
0307b0bd-19de-4366-a285-78a695e0a291_dnat 3
0275178c-a738-4620-8d07-f162c580e2d7_dnat 6
[root@dell-per740-53 ls-lr]# vn-appctl exit
-bash: vn-appctl: command not found
[root@dell-per740-53 ls-lr]# ovn-appctl exit
[root@dell-per740-53 ls-lr]# ovs-appctl vlog/disable-rate-limit
[root@dell-per740-53 ls-lr]# ovs-appctl vlog/set vconn:dbg
[root@dell-per740-53 ls-lr]# > /var/lo
local/ lock/ log/
[root@dell-per740-53 ls-lr]# > /var/lo
local/ lock/ log/
[root@dell-per740-53 ls-lr]# > /var/log/openvswitch/ovs
ovsdb-server.log ovs-vswitchd.log
[root@dell-per740-53 ls-lr]# > /var/log/openvswitch/ovs
ovsdb-server.log ovs-vswitchd.log
[root@dell-per740-53 ls-lr]# > /var/log/openvswitch/ovs-vswitchd.log
[root@dell-per740-53 ls-lr]# systemctl start ovn-controller
[root@dell-per740-53 ls-lr]# grep -i flush /var/log/openvswitch/ovs-vswitchd.log |grep zone_id=0
2022-06-10T01:44:36.421Z|00056|vconn|DBG|unix#4: received: NXT_CT_FLUSH_ZONE (OF1.5) (xid=0x6): zone_id=0 -------------------should not flush this zone_id=0
 
Description of bz2087194
With the move to shared gateway mode in OCP we changed GR to use the host ct zone to avoid conflicts with sharing the same addresses/ct entries with the host. However due to
https://mail.openvswitch.org/pipermail/ovs-dev/2016-September/323402.html
all entries are being flushed. OVN-Controller should only flush entries for zones it dynamically allocates that for ephemeral things like pod ips are not in use by any other entities in the system. Background on why it was added: