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Message #91763
[Bug 1928164] Re: [OVN] Ovn-controller dose not update the flows table when localport tap device is rebuilt
** Changed in: neutron
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1928164
Title:
[OVN] Ovn-controller dose not update the flows table when localport
tap device is rebuilt
Status in neutron:
Invalid
Bug description:
After all vm using network A on HV are deleted, the tap device of the network A is also deleted.
After the vm is re-created on this HV using the network A, the tap device will be rebuilt.
At this point, the flows table has not been updated and the vm's traffic cannot reach localport. Restore by restarting ovn-controller.
ovn version as:
# ovn-controller --version
ovn-controller 21.03.0
Open vSwitch Library 2.15.90
OpenFlow versions 0x6:0x6
SB DB Schema 20.16.1
Trace by ovn-trace is normal:
()[root@ovn-ovsdb-sb-1 /]# ovn-trace --summary 5f79485f-682c-434a-8202-f6658fa30076 'inport == "643e3bc7-0b44-4929-8c4d-ec63f19097f8" && eth.src == fa:16:3e:55:4a:8f && ip4.src == 192.168.222.168 && eth.dst == fa:16:3e:4a:d6:bc && ip4.dst == 169.254.169.254 && ip.ttl == 32'
# ip,reg14=0x16,vlan_tci=0x0000,dl_src=fa:16:3e:55:4a:8f,dl_dst=fa:16:3e:4a:d6:bc,nw_src=192.168.222.168,nw_dst=169.254.169.254,nw_proto=0,nw_tos=0,nw_ecn=0,nw_ttl=32
ingress(dp="jufeng", inport="instance-h0NdYw_jufeng_3fe45e35") {
next;
next;
reg0[0] = 1;
next;
ct_next;
ct_next(ct_state=est|trk /* default (use --ct to customize) */) {
reg0[8] = 1;
reg0[10] = 1;
next;
next;
outport = "8b01e3";
output;
egress(dp="jufeng", inport="instance-h0NdYw_jufeng_3fe45e35", outport="8b01e3") {
reg0[0] = 1;
next;
ct_next;
ct_next(ct_state=est|trk /* default (use --ct to customize) */) {
reg0[8] = 1;
reg0[10] = 1;
next;
output;
/* output to "8b01e3", type "localport" */;
};
};
};
};
Trace by flows is not normal:
# ovs-appctl ofproto/trace br-int in_port=33,tcp,dl_src=fa:16:3e:55:4a:8f,dl_dst=fa:16:3e:4a:d6:bc,nw_src=192.168.222.168,nw_dst=169.254.169.254,tp_dst=80
Flow: tcp,in_port=33,vlan_tci=0x0000,dl_src=fa:16:3e:55:4a:8f,dl_dst=fa:16:3e:4a:d6:bc,nw_src=192.168.222.168,nw_dst=169.254.169.254,nw_tos=0,nw_ecn=0,nw_ttl=0,tp_src=0,tp_dst=80,tcp_flags=0
bridge("br-int")
----------------
0. in_port=33, priority 100, cookie 0xebbdd9f7
set_field:0x19->reg13
set_field:0x5->reg11
set_field:0x3->reg12
set_field:0x3->metadata
set_field:0x16->reg14
resubmit(,8)
8. reg14=0x16,metadata=0x3,dl_src=fa:16:3e:55:4a:8f, priority 50, cookie 0x1a73fa10
resubmit(,9)
9. ip,reg14=0x16,metadata=0x3,dl_src=fa:16:3e:55:4a:8f,nw_src=192.168.222.168, priority 90, cookie 0x2690070f
resubmit(,10)
10. metadata=0x3, priority 0, cookie 0x4f77990b
resubmit(,11)
11. metadata=0x3, priority 0, cookie 0xd7e42894
resubmit(,12)
12. metadata=0x3, priority 0, cookie 0xa5400341
resubmit(,13)
13. ip,metadata=0x3, priority 100, cookie 0x510177c2
set_field:0x1000000000000000000000000/0x1000000000000000000000000->xxreg0
resubmit(,14)
14. metadata=0x3, priority 0, cookie 0x5505c270
resubmit(,15)
15. ip,reg0=0x1/0x1,metadata=0x3, priority 100, cookie 0xf2eaa3a5
ct(table=16,zone=NXM_NX_REG13[0..15])
drop
-> A clone of the packet is forked to recirculate. The forked pipeline will be resumed at table 16.
-> Sets the packet to an untracked state, and clears all the conntrack fields.
Final flow: tcp,reg0=0x1,reg11=0x5,reg12=0x3,reg13=0x19,reg14=0x16,metadata=0x3,in_port=33,vlan_tci=0x0000,dl_src=fa:16:3e:55:4a:8f,dl_dst=fa:16:3e:4a:d6:bc,nw_src=192.168.222.168,nw_dst=169.254.169.254,nw_tos=0,nw_ecn=0,nw_ttl=0,tp_src=0,tp_dst=80,tcp_flags=0
Megaflow: recirc_id=0,eth,tcp,in_port=33,vlan_tci=0x0000/0x1fff,dl_src=fa:16:3e:55:4a:8f,dl_dst=fa:16:3e:4a:d6:bc,nw_src=192.168.222.168,nw_dst=128.0.0.0/2,nw_frag=no
Datapath actions: ct(zone=25),recirc(0xe8)
===============================================================================
recirc(0xe8) - resume conntrack with default ct_state=trk|new (use --ct-next to customize)
===============================================================================
Flow:
recirc_id=0xe8,ct_state=new|trk,ct_zone=25,eth,tcp,reg0=0x1,reg11=0x5,reg12=0x3,reg13=0x19,reg14=0x16,metadata=0x3,in_port=33,vlan_tci=0x0000,dl_src=fa:16:3e:55:4a:8f,dl_dst=fa:16:3e:4a:d6:bc,nw_src=192.168.222.168,nw_dst=169.254.169.254,nw_tos=0,nw_ecn=0,nw_ttl=0,tp_src=0,tp_dst=80,tcp_flags=0
bridge("br-int")
----------------
thaw
Resuming from table 16
16. ct_state=+new-est+trk,metadata=0x3, priority 7, cookie 0x6d37a2c
set_field:0x80000000000000000000000000/0x80000000000000000000000000->xxreg0
set_field:0x200000000000000000000000000/0x200000000000000000000000000->xxreg0
resubmit(,17)
17. ip,reg0=0x80/0x80,reg14=0x16,metadata=0x3, priority 2002, cookie 0x6cdd739a
set_field:0x2000000000000000000000000/0x2000000000000000000000000->xxreg0
resubmit(,18)
18. metadata=0x3, priority 0, cookie 0x20565915
resubmit(,19)
19. metadata=0x3, priority 0, cookie 0x5f4ccace
resubmit(,20)
20. metadata=0x3, priority 0, cookie 0x1172b12a
resubmit(,21)
21. ip,reg0=0x2/0x2,metadata=0x3, priority 100, cookie 0x39726b61
ct(commit,zone=NXM_NX_REG13[0..15],exec(set_field:0/0x1->ct_label))
set_field:0/0x1->ct_label
-> Sets the packet to an untracked state, and clears all the conntrack fields.
resubmit(,22)
22. metadata=0x3, priority 0, cookie 0xd70f120c
resubmit(,23)
23. metadata=0x3, priority 0, cookie 0x3b8fb19
resubmit(,24)
24. metadata=0x3, priority 0, cookie 0x8948e698
resubmit(,25)
25. metadata=0x3, priority 0, cookie 0xdc7bec76
resubmit(,26)
26. metadata=0x3, priority 0, cookie 0x26b5d0d
resubmit(,27)
27. metadata=0x3, priority 0, cookie 0x55ef644d
resubmit(,28)
28. metadata=0x3, priority 0, cookie 0x915abc2b
resubmit(,29)
29. metadata=0x3, priority 0, cookie 0x4ec355ed
resubmit(,30)
30. metadata=0x3, priority 0, cookie 0x73a4bec2
resubmit(,31)
31. metadata=0x3,dl_dst=fa:16:3e:4a:d6:bc, priority 50, cookie 0xb7f24943
set_field:0x1->reg15
resubmit(,37)
37. priority 0
resubmit(,38)
38. reg15=0x1,metadata=0x3, priority 100
set_field:0x18->reg13
set_field:0x5->reg11
set_field:0x3->reg12
resubmit(,39)
39. priority 0
set_field:0->reg0
set_field:0->reg1
set_field:0->reg2
set_field:0->reg3
set_field:0->reg4
set_field:0->reg5
set_field:0->reg6
set_field:0->reg7
set_field:0->reg8
set_field:0->reg9
resubmit(,40)
40. metadata=0x3, priority 0, cookie 0x79edd1f9
resubmit(,41)
41. ip,metadata=0x3, priority 100, cookie 0xc29e223c
set_field:0x1000000000000000000000000/0x1000000000000000000000000->xxreg0
resubmit(,42)
42. ip,reg0=0x1/0x1,metadata=0x3, priority 100, cookie 0x66e9692f
ct(table=43,zone=NXM_NX_REG13[0..15])
drop
-> A clone of the packet is forked to recirculate. The forked pipeline will be resumed at table 43.
-> Sets the packet to an untracked state, and clears all the conntrack fields.
Final flow: recirc_id=0xe8,eth,tcp,reg0=0x1,reg11=0x5,reg12=0x3,reg13=0x18,reg14=0x16,reg15=0x1,metadata=0x3,in_port=33,vlan_tci=0x0000,dl_src=fa:16:3e:55:4a:8f,dl_dst=fa:16:3e:4a:d6:bc,nw_src=192.168.222.168,nw_dst=169.254.169.254,nw_tos=0,nw_ecn=0,nw_ttl=0,tp_src=0,tp_dst=80,tcp_flags=0
Megaflow: recirc_id=0xe8,ct_state=+new-est-rel-rpl-inv+trk,ct_label=0/0x1,eth,tcp,in_port=33,dl_src=fa:16:3e:55:4a:8f,dl_dst=fa:16:3e:4a:d6:bc,nw_dst=128.0.0.0/2,nw_frag=no
Datapath actions: ct(commit,zone=25,label=0/0x1),ct(zone=24),recirc(0xe9)
===============================================================================
recirc(0xe9) - resume conntrack with default ct_state=trk|new (use --ct-next to customize)
===============================================================================
Flow:
recirc_id=0xe9,ct_state=new|trk,ct_zone=24,eth,tcp,reg0=0x1,reg11=0x5,reg12=0x3,reg13=0x18,reg14=0x16,reg15=0x1,metadata=0x3,in_port=33,vlan_tci=0x0000,dl_src=fa:16:3e:55:4a:8f,dl_dst=fa:16:3e:4a:d6:bc,nw_src=192.168.222.168,nw_dst=169.254.169.254,nw_tos=0,nw_ecn=0,nw_ttl=0,tp_src=0,tp_dst=80,tcp_flags=0
bridge("br-int")
----------------
thaw
Resuming from table 43
43. metadata=0x3, priority 0, cookie 0x61feba78
resubmit(,44)
44. ct_state=+new-est+trk,metadata=0x3, priority 7, cookie 0x9ec270ec
set_field:0x80000000000000000000000000/0x80000000000000000000000000->xxreg0
set_field:0x200000000000000000000000000/0x200000000000000000000000000->xxreg0
resubmit(,45)
45. ct_state=-est+trk,ip,metadata=0x3, priority 1, cookie 0x38bc1887
set_field:0x2000000000000000000000000/0x2000000000000000000000000->xxreg0
resubmit(,46)
46. metadata=0x3, priority 0, cookie 0xa32f8f02
resubmit(,47)
47. metadata=0x3, priority 0, cookie 0xbc6d5e4e
resubmit(,48)
48. ip,reg0=0x2/0x2,metadata=0x3, priority 100, cookie 0x2a5f6224
ct(commit,zone=NXM_NX_REG13[0..15],exec(set_field:0/0x1->ct_label))
set_field:0/0x1->ct_label
-> Sets the packet to an untracked state, and clears all the conntrack fields.
resubmit(,49)
49. metadata=0x3, priority 0, cookie 0x7ef415be
resubmit(,50)
50. reg15=0x1,metadata=0x3, priority 50, cookie 0x70a3745
resubmit(,64)
64. priority 0
resubmit(,65)
65. reg15=0x1,metadata=0x3, priority 100, cookie 0xd7e139a0
output:26
>> Nonexistent output port
Final flow: recirc_id=0xe9,eth,tcp,reg0=0x283,reg11=0x5,reg12=0x3,reg13=0x18,reg14=0x16,reg15=0x1,metadata=0x3,in_port=33,vlan_tci=0x0000,dl_src=fa:16:3e:55:4a:8f,dl_dst=fa:16:3e:4a:d6:bc,nw_src=192.168.222.168,nw_dst=169.254.169.254,nw_tos=0,nw_ecn=0,nw_ttl=0,tp_src=0,tp_dst=80,tcp_flags=0
Megaflow: recirc_id=0xe9,ct_state=+new-est-rel-rpl-inv+trk,ct_label=0/0x1,eth,ip,in_port=33,dl_src=fa:16:3e:55:4a:8f,dl_dst=00:00:00:00:00:00/01:00:00:00:00:00,nw_frag=no
Datapath actions: ct(commit,zone=24,label=0/0x1)
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