Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.

The FDP team is no longer accepting new bugs in Bugzilla. Please report your issues under FDP project in Jira. Thanks.

Bug 1970258

Summary:	[OVN] OVN builds too many lflows for NA responding for load balancer VIPs
Product:	Red Hat Enterprise Linux Fast Datapath	Reporter:	ying xu <yinxu>
Component:	OVN	Assignee:	lorenzo bianconi <lorenzo.bianconi>
Status:	CLOSED ERRATA	QA Contact:	ying xu <yinxu>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	FDP 21.E	CC:	ctrautma, jiji, kfida, lorenzo.bianconi
Target Milestone:	---
Target Release:	FDP 21.I
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-12-09 15:37:27 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description ying xu 2021-06-10 07:44:30 UTC

Description of problem:
as https://bugzilla.redhat.com/show_bug.cgi?id=1945415, reduce the arp flows for ipv4 vip,but it hasn't been fixed for ipv6 vips.

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


How reproducible:
always

Steps to Reproduce:
# ovn-nbct list load_balancer
-bash: ovn-nbct: command not found
[root@dell-per730-19 load_balance]# ovn-nbctl list load_balancer
_uuid               : da49cb17-6299-44a3-af36-deec75cd1b45
external_ids        : {}
health_check        : [a884e563-9deb-419a-8877-5250f83150d2]
ip_port_mappings    : {"192.168.0.1"="ls1p1:192.168.0.254"}
name                : lb0
options             : {}
protocol            : udp
selection_fields    : []
vips                : {"192.168.2.1:12345"="192.168.0.1:12345,192.168.0.2:12345", "30.0.0.1:8000"="192.168.0.1:12345,192.168.0.2:12345", "[3000::100]:12345"="[3001::1]:12345,[3001::2]:12345"}
[root@dell-per730-19 load_balance]# ovn-nbctl set load_balancer da49cb17-6299-44a3-af36-deec75cd1b45  vips:'"[3000::200]:12345"'='"[3001::1]:12345,[3001::2]:12345"
> ^C
[root@dell-per730-19 load_balance]# ovn-nbctl set load_balancer da49cb17-6299-44a3-af36-deec75cd1b45  vips:'"[3000::200]:12345"'='"[3001::1]:12345,[3001::2]:12345"'
[root@dell-per730-19 load_balance]# ovn-sbctl dump-flows|grep 3000::200
  table=3 (lr_in_ip_input     ), priority=90   , match=(inport == "lr1ls1" && nd_ns && nd.target == 3000::200), action=(nd_na { eth.src = xreg0[0..47]; ip6.src = 3000::200; nd.target = 3000::200; nd.tll = xreg0[0..47]; outport = inport; flags.loopback = 1; output; };)
  table=3 (lr_in_ip_input     ), priority=90   , match=(inport == "lr1ls2" && nd_ns && nd.target == 3000::200), action=(nd_na { eth.src = xreg0[0..47]; ip6.src = 3000::200; nd.target = 3000::200; nd.tll = xreg0[0..47]; outport = inport; flags.loopback = 1; output; };)
  table=3 (lr_in_ip_input     ), priority=90   , match=(inport == "lr1p" && nd_ns && nd.target == 3000::200), action=(nd_na { eth.src = xreg0[0..47]; ip6.src = 3000::200; nd.target = 3000::200; nd.tll = xreg0[0..47]; outport = inport; flags.loopback = 1; output; };)
  table=4 (lr_in_defrag       ), priority=100  , match=(ip && ip6.dst == 3000::200), action=(ct_next;)
  table=6 (lr_in_dnat         ), priority=120  , match=(ct.est && ip && ip6.dst == 3000::200 && udp && udp.dst == 12345), action=(ct_dnat;)
  table=6 (lr_in_dnat         ), priority=120  , match=(ct.new && ip && ip6.dst == 3000::200 && udp && udp.dst == 12345), action=(ct_lb(backends=[3001::1]:12345,[3001::2]:12345);)
[root@dell-per730-19 load_balance]# ovn-sbctl dump-flows|grep 3000::100
  table=3 (lr_in_ip_input     ), priority=90   , match=(inport == "lr1ls1" && nd_ns && nd.target == 3000::100), action=(nd_na { eth.src = xreg0[0..47]; ip6.src = 3000::100; nd.target = 3000::100; nd.tll = xreg0[0..47]; outport = inport; flags.loopback = 1; output; };)
  table=3 (lr_in_ip_input     ), priority=90   , match=(inport == "lr1ls2" && nd_ns && nd.target == 3000::100), action=(nd_na { eth.src = xreg0[0..47]; ip6.src = 3000::100; nd.target = 3000::100; nd.tll = xreg0[0..47]; outport = inport; flags.loopback = 1; output; };)
  table=3 (lr_in_ip_input     ), priority=90   , match=(inport == "lr1p" && nd_ns && nd.target == 3000::100), action=(nd_na { eth.src = xreg0[0..47]; ip6.src = 3000::100; nd.target = 3000::100; nd.tll = xreg0[0..47]; outport = inport; flags.loopback = 1; output; };)
  table=4 (lr_in_defrag       ), priority=100  , match=(ip && ip6.dst == 3000::100), action=(ct_next;)
  table=6 (lr_in_dnat         ), priority=120  , match=(ct.est && ip && ip6.dst == 3000::100 && udp && udp.dst == 12345), action=(ct_dnat;)
  table=6 (lr_in_dnat         ), priority=120  , match=(ct.new && ip && ip6.dst == 3000::100 && udp && udp.dst == 12345), action=(ct_lb(backends=[3001::1]:12345,[3001::2]:12345);)


Actual results:


Expected results:


Additional info:

Comment 1 lorenzo bianconi 2021-08-11 22:24:58 UTC

upstream patch: http://patchwork.ozlabs.org/project/ovn/patch/577d1dfb98cdef5247f645cc5f35207392d800cb.1628720586.git.lorenzo.bianconi@redhat.com/

Comment 5 ying xu 2021-10-20 01:54:43 UTC

verified on version:
# rpm -qa|grep ovn
ovn-2021-central-21.09.0-12.el8fdp.x86_64
ovn-2021-21.09.0-12.el8fdp.x86_64
ovn-2021-host-21.09.0-12.el8fdp.x86_64


# ovn-nbctl list load_balancer
_uuid               : 237c5f47-b2ab-4e62-b3a9-bbbb256c57f9
external_ids        : {}
health_check        : [49a26e1c-09a4-40b5-9193-48fa466f8fa1]
ip_port_mappings    : {"192.168.0.1"="ls1p1:192.168.0.254"}
name                : lb0
options             : {}
protocol            : udp
selection_fields    : []
vips                : {"192.168.2.1:12345"="192.168.0.1:12345,192.168.0.2:12345", "30.0.0.1:8000"="192.168.0.1:12345,192.168.0.2:12345", "[2002::100]:80"="[3001::1]:1234,[3001::2]:1234", "[3000::100]:12345"="[3001::1]:12345,[3001::2]:12345"}


# ovn-sbctl dump-flows|grep "2002::100, 3000::100"
  table=3 (lr_in_ip_input     ), priority=90   , match=(inport == "lr1ls1" && nd_ns && nd.target == { 2002::100, 3000::100 }), action=(nd_na { eth.src = xreg0[0..47]; ip6.src = nd.target; nd.tll = xreg0[0..47]; outport = inport; flags.loopback = 1; output; };)
  table=3 (lr_in_ip_input     ), priority=90   , match=(inport == "lr1ls2" && nd_ns && nd.target == { 2002::100, 3000::100 }), action=(nd_na { eth.src = xreg0[0..47]; ip6.src = nd.target; nd.tll = xreg0[0..47]; outport = inport; flags.loopback = 1; output; };)
  table=3 (lr_in_ip_input     ), priority=90   , match=(inport == "lr1p" && nd_ns && nd.target == { 2002::100, 3000::100 }), action=(nd_na { eth.src = xreg0[0..47]; ip6.src = nd.target; nd.tll = xreg0[0..47]; outport = inport; flags.loopback = 1; output; };)

set verified.

Comment 7 errata-xmlrpc 2021-12-09 15:37:27 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (ovn bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2021:5059