From https://bugzilla.redhat.com/show_bug.cgi?id=1846189
Description of problem:
[ovn 20.E]selection_fields for udp and sctp case doesn't work correctly
Version-Release number of selected component (if applicable):
# rpm -qa|grep ovn
ovn2.13-central-2.13.0-34.el7fdp.x86_64
ovn2.13-2.13.0-34.el7fdp.x86_64
ovn2.13-host-2.13.0-34.el7fdp.x86_64
How reproducible:
always
Steps to Reproduce:
server:
rlRun "ovn-nbctl ls-add ls1"
rlRun "ovn-nbctl lsp-add ls1 ls1p1"
rlRun "ovn-nbctl lsp-set-addresses ls1p1 00:01:02:01:01:01"
rlRun "ovn-nbctl lsp-add ls1 ls1p2"
rlRun "ovn-nbctl lsp-set-addresses ls1p2 00:01:02:01:01:02"
rlRun "ovn-nbctl lsp-add ls1 ls1p3"
rlRun "ovn-nbctl lsp-set-addresses ls1p3 00:01:02:01:01:04"
rlRun "ovn-nbctl ls-add ls2"
rlRun "ovn-nbctl lsp-add ls2 ls2p1"
rlRun "ovn-nbctl lsp-set-addresses ls2p1 00:01:02:01:01:03"
rlRun "ovs-vsctl add-port br-int vm1 -- set interface vm1 type=internal"
rlRun "ip netns add server0"
rlRun "ip link set vm1 netns server0"
rlRun "ip netns exec server0 ip link set lo up"
rlRun "ip netns exec server0 ip link set vm1 up"
rlRun "ip netns exec server0 ip link set vm1 address 00:01:02:01:01:01"
rlRun "ip netns exec server0 ip addr add 192.168.0.1/24 dev vm1"
rlRun "ip netns exec server0 ip addr add 3001::1/64 dev vm1"
rlRun "ip netns exec server0 ip route add default via 192.168.0.254 dev vm1"
rlRun "ip netns exec server0 ip -6 route add default via 3001::a dev vm1"
rlRun "ovs-vsctl set Interface vm1 external_ids:iface-id=ls1p1"
rlRun "ovs-vsctl add-port br-int vm2 -- set interface vm2 type=internal"
rlRun "ip netns add server1"
rlRun "ip link set vm2 netns server1"
rlRun "ip netns exec server1 ip link set lo up"
rlRun "ip netns exec server1 ip link set vm2 up"
rlRun "ip netns exec server1 ip link set vm2 address 00:01:02:01:01:02"
rlRun "ip netns exec server1 ip addr add 192.168.0.2/24 dev vm2"
rlRun "ip netns exec server1 ip addr add 3001::2/64 dev vm2"
rlRun "ip netns exec server1 ip route add default via 192.168.0.254 dev vm2"
rlRun "ip netns exec server1 ip -6 route add default via 3001::a dev vm2"
rlRun "ovs-vsctl set Interface vm2 external_ids:iface-id=ls1p2"
rlRun "ovn-nbctl lr-add lr1"
rlRun "ovn-nbctl lrp-add lr1 lr1ls1 00:01:02:0d:01:01 192.168.0.254/24 3001::a/64"
rlRun "ovn-nbctl lrp-add lr1 lr1ls2 00:01:02:0d:01:02 192.168.1.254/24 3001:1::a/64"
rlRun "ovn-nbctl lsp-add ls1 ls1lr1"
rlRun "ovn-nbctl lsp-set-type ls1lr1 router"
rlRun "ovn-nbctl lsp-set-options ls1lr1 router-port=lr1ls1"
rlRun "ovn-nbctl lsp-set-addresses ls1lr1 \"00:01:02:0d:01:01 192.168.0.254 3001::a\""
rlRun "ovn-nbctl lsp-add ls2 ls2lr1"
rlRun "ovn-nbctl lsp-set-type ls2lr1 router"
rlRun "ovn-nbctl lsp-set-options ls2lr1 router-port=lr1ls2"
rlRun "ovn-nbctl lsp-set-addresses ls2lr1 \"00:01:02:0d:01:02 192.168.1.254 3001:1::a\""
rlRun "ovn-nbctl lrp-add lr1 lr1p 00:01:02:0d:0f:01 172.16.1.254/24 2002::a/64"
rlRun "ovn-nbctl lb-add lb0 192.168.2.1:12345 192.168.0.1:12345,192.168.0.2:12345"
rlRun "ovn-nbctl lb-add lb0 [3000::100]:12345 [3001::1]:12345,[3001::2]:12345"
uuid=`ovn-nbctl list Load_Balancer |grep uuid|awk '{printf $3}'`
rlRun "ovn-nbctl set load_balancer $uuid selection_fields=\"ip_src,ip_dst\""
rlRun "ovn-nbctl show"
rlRun "ovn-sbctl show"
ovn-nbctl set Logical_Router lr1 options:chassis="hv1"
rlRun "ovn-nbctl ls-lb-add ls1 lb0"
rlRun "ovn-nbctl lb-add lb1 192.168.2.1:12345 192.168.0.1:12345,192.168.0.2:12345"
rlRun "ovn-nbctl lb-add lb1 [3000::100]:12345 [3001::1]:12345,[3001::2]:12345"
uuid1=`ovn-nbctl lb-list lb1|grep lb1|awk '{printf $1}' `
rlRun "ovn-nbctl set load_balancer $uuid1 protocol=\"udp\""
rlRun "ovn-nbctl set load_balancer $uuid1 selection_fields=\"ip_src,ip_dst,tp_src,tp_dst\""
rlRun "ovn-nbctl list load_balancer"
rlRun "ovn-nbctl ls-lb-add ls1 lb1"
client:
ovs-vsctl add-port br-int vm4 -- set interface vm4 type=internal
ip netns add vm4
ip link set vm4 netns vm4
ip netns exec vm4 ip link set lo up
ip netns exec vm4 ip link set vm4 up
ip netns exec vm4 ip link set vm4 address 00:01:02:01:01:04
ip netns exec vm4 ip addr add 192.168.0.4/24 dev vm4
ip netns exec vm4 ip addr add 3001::4/64 dev vm4
ip netns exec vm4 ip route add default via 192.168.0.254 dev vm4
ip netns exec vm4 ip -6 route add default via 3001::a dev vm4
ovs-vsctl set Interface vm4 external_ids:iface-id=ls1p3
# ovn-nbctl list load_balancer
_uuid : 99e5fc15-4c50-48de-a76b-32da19713170
external_ids : {}
health_check : []
ip_port_mappings : {}
name : lb0
protocol : tcp
selection_fields : [ip_dst, ip_src]
vips : {"192.168.2.1:12345"="192.168.0.1:12345,192.168.0.2:12345", "[3000::100]:12345"="[3001::1]:12345,[3001::2]:12345"}
_uuid : 6760b0f3-f598-43eb-b950-a664f152ab18
external_ids : {}
health_check : []
ip_port_mappings : {}
name : lb1
protocol : udp
selection_fields : [ip_dst, ip_src, tp_dst, tp_src]
vips : {"192.168.2.1:12345"="192.168.0.1:12345,192.168.0.2:12345", "[3000::100]:12345"="[3001::1]:12345,[3001::2]:12345"}
# ovs-ofctl dump-groups br-int
NXST_GROUP_DESC reply (xid=0x2):
group_id=4,type=select,selection_method=hash,fields(ip_src,ip_dst),bucket=bucket_id:0,weight:100,actions=ct(commit,table=19,zone=NXM_NX_REG13[0..15],nat(dst=[3001::1]:12345)),bucket=bucket_id:1,weight:100,actions=ct(commit,table=19,zone=NXM_NX_REG13[0..15],nat(dst=[3001::2]:12345))
group_id=3,type=select,selection_method=hash,fields(ip_src,ip_dst),bucket=bucket_id:0,weight:100,actions=ct(commit,table=19,zone=NXM_NX_REG13[0..15],nat(dst=192.168.0.1:12345)),bucket=bucket_id:1,weight:100,actions=ct(commit,table=19,zone=NXM_NX_REG13[0..15],nat(dst=192.168.0.2:12345))
group_id=1,type=select,selection_method=hash,fields(ip_src,ip_dst,tcp_src,tcp_dst),bucket=bucket_id:0,weight:100,actions=ct(commit,table=19,zone=NXM_NX_REG13[0..15],nat(dst=192.168.0.1:12345)),bucket=bucket_id:1,weight:100,actions=ct(commit,table=19,zone=NXM_NX_REG13[0..15],nat(dst=192.168.0.2:12345))-----------------here should be udp_dst,udp_src,not tcp
group_id=2,type=select,selection_method=hash,fields(ip_src,ip_dst,tcp_src,tcp_dst),bucket=bucket_id:0,weight:100,actions=ct(commit,table=19,zone=NXM_NX_REG13[0..15],nat(dst=[3001::1]:12345)),bucket=bucket_id:1,weight:100,actions=ct(commit,table=19,zone=NXM_NX_REG13[0..15],nat(dst=[3001::2]:12345))
from vm4 send udp traffic with different ports to the vip,only one backend can receive the traffic,just like the selection fields is ip_src,ip_dst.(But for tcp case, it works correctly)
Expected results:
group_id=1,type=select,selection_method=hash,fields(ip_src,ip_dst,tcp_src,tcp_dst) should be
group_id=1,type=select,selection_method=hash,fields(ip_src,ip_dst,udp_src,udp_dst)
send udp traffic with different ports to the vip,all backends can receive the traffic
send udp traffic with the same port to the vip,only one backend can receive the traffic(this is OK now)
Additional info:
sctp case has the same issue.
The fix for this issue is merged in master and also available in v20.06.1.
If networking-ovn uses ovn from v20.06.1 this issue should not be seen.
Thanks
Numan