<div dir="ltr">Hi Neutrons,<div><br></div><div>I met this situation once in the release Liberty.</div><div>Here is the thing.</div><div>When the create_port_chain() is called, (@networking-sfc/networking_sfc/services/sfc/drivers/ovs/driver.py)</div><div>it goes the following code path</div><div><div> -> _thread_update_path_nodes()</div><div> ->_update_path_node_flowrules()</div><div> ->_update_path_node_port_flowrules()</div><div> ->_build_portchain_flowrule_body()</div><div> ->_update_path_node_next_hops()</div><div> ->_get_port_subnet_gw_info_by_port_id</div><div> ->_get_port_subnet_gw_info() raise exc.SfcNoSubnetGateway <br></div></div><div>if you didn't give the network a router, it raises SfcNoSubnetGateway .</div><div><div>And then back to the plugin.py: create_port_chain(), cache the exception sfc_exc.SfcDriverError as e</div></div><div>In this exception, there is a delete_port_chain() method.</div><div>But due to the synchronization problem between DB and ovs-bridge, it will delete failure.</div><div>I hope this info. could help anyone who uses a liberty version.</div><div>Next time, don't forget giving a router before creating a port chain.</div><div><br></div><div>I don't see this code path in the master branch.</div><div>It may be better in mitaka.</div><div><br></div><div>Thanks</div><div>Vincent</div><div><br></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">2016-08-31 2:19 GMT+08:00 Cathy Zhang <span dir="ltr"><<a href="mailto:Cathy.H.Zhang@huawei.com" target="_blank">Cathy.H.Zhang@huawei.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div lang="EN-US" link="blue" vlink="purple">
<div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Hi Alioune,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">It is weird that when you create a port chain, you get a “chain delete failed” error message.
<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">We never had this problem. Chain deletion is only involved when you do “delete chain” or “update chain”.
<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Not sure which networking code file combination you are using or whether it is because your system is not properly cleaned up or not properly installed.
<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">We are going to release the networking-sfc mitaka version soon.
<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I would suggest that you wait a little bit and then use the official released mitaka version and reinstall the feature on your system.
<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Thanks,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Cathy<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Alioune [mailto:<a href="mailto:balioune3@gmail.com" target="_blank">balioune3@gmail.com</a>]
<br>
<b>Sent:</b> Tuesday, August 30, 2016 8:03 AM<br>
<b>To:</b> OpenStack Development Mailing List (not for usage questions)<br>
<b>Cc:</b> Cathy Zhang; Mohan Kumar; Henry Fourie<br>
<b>Subject:</b> Re: [openstack-dev][neutron][<wbr>networking-sfc] Unable to create openstack SFC<u></u><u></u></span></p>
</div><div><div class="h5">
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<p class="MsoNormal">Hi, <u></u><u></u></p>
<div>
<p class="MsoNormal">Have you received my previous email ?<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">Regards,<u></u><u></u></p>
</div>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<p class="MsoNormal">On 15 August 2016 at 13:39, Alioune <<a href="mailto:balioune3@gmail.com" target="_blank">balioune3@gmail.com</a>> wrote:<u></u><u></u></p>
<div>
<div>
<p class="MsoNormal">Hi all,<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">I'm trying to launch Openstack SFC as explained in[1] by creating 2 SFs, 1 Web Server (DST) and the DHCP namespace as the SRC.<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">I've installed OVS (Open vSwitch) 2.3.90 with Linux kernel 3.13.0-62 and the neutron L2-agent runs correctly.<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">I followed the process by creating classifier, port pairs and port_group but I got a wrong message "delete_port_chain failed." when creating port_chain [2]<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">I tried to create the neutron ports with and without the option "--no-security-groups" then tcpdpump on SFs tap interfaces but the ICMP packets don't go through the SFs.<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">Can anyone advice to fix? that ? <u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">What's your channel on IRC ?<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">Regards,<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">[1] <a href="https://wiki.openstack.org/wiki/Neutron/ServiceInsertionAndChaining" target="_blank">
https://wiki.openstack.org/<wbr>wiki/Neutron/<wbr>ServiceInsertionAndChaining</a><u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">[2]<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">vagrant@ubuntu:~/openstack_<wbr>sfc$ ./08-os_create_port_chain.sh<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">delete_port_chain failed.<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">vagrant@ubuntu:~/openstack_<wbr>sfc$ cat 08-os_create_port_chain.sh<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">#!/bin/bash<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">neutron port-chain-create --port-pair-group PG1 --port-pair-group PG2 --flow-classifier FC1 PC1<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">[3] Output OVS Flows<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">vagrant@ubuntu:~$ sudo ovs-ofctl dump-flows br-tun -O OpenFlow13<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">OFPST_FLOW reply (OF1.3) (xid=0x2):<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=9615.385s, table=0, n_packets=146, n_bytes=11534, priority=1,in_port=1 actions=resubmit(,2)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=9615.382s, table=0, n_packets=0, n_bytes=0, priority=0 actions=drop<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=9615.382s, table=2, n_packets=5, n_bytes=490, priority=0,dl_dst=00:00:00:00:<wbr>00:00/01:00:00:00:00:00 actions=resubmit(,20)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=9615.381s, table=2, n_packets=141, n_bytes=11044, priority=0,dl_dst=01:00:00:00:<wbr>00:00/01:00:00:00:00:00 actions=resubmit(,22)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=9615.380s, table=3, n_packets=0, n_bytes=0, priority=0 actions=drop<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=9615.380s, table=4, n_packets=0, n_bytes=0, priority=0 actions=drop<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=8617.106s, table=4, n_packets=0, n_bytes=0, priority=1,tun_id=0x40e actions=push_vlan:0x8100,set_<wbr>field:4097->vlan_vid,resubmit(<wbr>,10)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=9615.379s, table=6, n_packets=0, n_bytes=0, priority=0 actions=drop<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=9615.379s, table=10, n_packets=0, n_bytes=0, priority=1 actions=learn(table=20,hard_<wbr>timeout=300,priority=1,cookie=<wbr>0xbc2e9105125301dc,NXM_OF_<wbr>VLAN_TCI[0..11],NXM_OF_ETH_<wbr>DST[]=NXM_OF_ETH_SRC[],load:0-<wbr>>NXM_OF_VLAN_TCI[],load:NXM_<wbr>NX_TUN_ID[]->NXM_NX_TUN_ID[],<wbr>output:NXM_OF_IN_PORT[]),<wbr>output:1<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=9615.378s, table=20, n_packets=5, n_bytes=490, priority=0 actions=resubmit(,22)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=9615.342s, table=22, n_packets=146, n_bytes=11534, priority=0 actions=drop<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">vagrant@ubuntu:~$ sudo ovs-ofctl dump-flows br-int -O OpenFlow13<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">OFPST_FLOW reply (OF1.3) (xid=0x2):<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6712.090s, table=0, n_packets=0, n_bytes=0, priority=10,icmp6,in_port=7,<wbr>icmp_type=136 actions=resubmit(,24)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6709.623s, table=0, n_packets=0, n_bytes=0, priority=10,icmp6,in_port=8,<wbr>icmp_type=136 actions=resubmit(,24)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6555.755s, table=0, n_packets=0, n_bytes=0, priority=10,icmp6,in_port=10,<wbr>icmp_type=136 actions=resubmit(,24)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6559.596s, table=0, n_packets=0, n_bytes=0, priority=10,icmp6,in_port=9,<wbr>icmp_type=136 actions=resubmit(,24)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6461.028s, table=0, n_packets=0, n_bytes=0, priority=10,icmp6,in_port=11,<wbr>icmp_type=136 actions=resubmit(,24)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6712.071s, table=0, n_packets=13, n_bytes=546, priority=10,arp,in_port=7 actions=resubmit(,24)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6709.602s, table=0, n_packets=0, n_bytes=0, priority=10,arp,in_port=8 actions=resubmit(,24)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6555.727s, table=0, n_packets=0, n_bytes=0, priority=10,arp,in_port=10 actions=resubmit(,24)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6559.574s, table=0, n_packets=12, n_bytes=504, priority=10,arp,in_port=9 actions=resubmit(,24)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6461.005s, table=0, n_packets=15, n_bytes=630, priority=10,arp,in_port=11 actions=resubmit(,24)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=9620.388s, table=0, n_packets=514, n_bytes=49656, priority=0 actions=NORMAL<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=9619.277s, table=0, n_packets=0, n_bytes=0, priority=20,mpls actions=resubmit(,10)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6712.111s, table=0, n_packets=25, n_bytes=2674, priority=9,in_port=7 actions=resubmit(,25)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6559.621s, table=0, n_packets=24, n_bytes=2576, priority=9,in_port=9 actions=resubmit(,25)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6555.777s, table=0, n_packets=2, n_bytes=140, priority=9,in_port=10 actions=resubmit(,25)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6461.082s, table=0, n_packets=47, n_bytes=4830, priority=9,in_port=11 actions=resubmit(,25)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6709.646s, table=0, n_packets=3, n_bytes=230, priority=9,in_port=8 actions=resubmit(,25)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=9619.265s, table=10, n_packets=0, n_bytes=0, priority=0 actions=drop<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=9620.378s, table=23, n_packets=0, n_bytes=0, priority=0 actions=drop<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=9620.368s, table=24, n_packets=0, n_bytes=0, priority=0 actions=drop<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6709.633s, table=24, n_packets=0, n_bytes=0, priority=2,icmp6,in_port=8,<wbr>icmp_type=136,nd_target=fe80::<wbr>f816:3eff:fe2a:fe actions=NORMAL<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6712.101s, table=24, n_packets=0, n_bytes=0, priority=2,icmp6,in_port=7,<wbr>icmp_type=136,nd_target=fe80::<wbr>f816:3eff:fee7:1362 actions=NORMAL<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6559.607s, table=24, n_packets=0, n_bytes=0, priority=2,icmp6,in_port=9,<wbr>icmp_type=136,nd_target=fe80::<wbr>f816:3eff:fe91:95ee actions=NORMAL<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6555.766s, table=24, n_packets=0, n_bytes=0, priority=2,icmp6,in_port=10,<wbr>icmp_type=136,nd_target=fe80::<wbr>f816:3eff:fe76:d998 actions=NORMAL<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6461.055s, table=24, n_packets=0, n_bytes=0, priority=2,icmp6,in_port=11,<wbr>icmp_type=136,nd_target=fe80::<wbr>f816:3eff:fe5e:ed96 actions=NORMAL<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6709.611s, table=24, n_packets=0, n_bytes=0, priority=2,arp,in_port=8,arp_<wbr>spa=55.55.55.12 actions=resubmit(,25)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6555.741s, table=24, n_packets=0, n_bytes=0, priority=2,arp,in_port=10,arp_<wbr>spa=55.55.55.14 actions=resubmit(,25)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6712.080s, table=24, n_packets=13, n_bytes=546, priority=2,arp,in_port=7,arp_<wbr>spa=55.55.55.11 actions=resubmit(,25)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6559.584s, table=24, n_packets=12, n_bytes=504, priority=2,arp,in_port=9,arp_<wbr>spa=55.55.55.13 actions=resubmit(,25)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6461.015s, table=24, n_packets=15, n_bytes=630, priority=2,arp,in_port=11,arp_<wbr>spa=55.55.55.15 actions=resubmit(,25)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6709.714s, table=25, n_packets=0, n_bytes=0, priority=2,in_port=8,dl_src=<wbr>fa:16:3e:2a:00:fe actions=NORMAL<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6559.641s, table=25, n_packets=34, n_bytes=2940, priority=2,in_port=9,dl_src=<wbr>fa:16:3e:91:95:ee actions=NORMAL<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6461.117s, table=25, n_packets=60, n_bytes=5320, priority=2,in_port=11,dl_src=<wbr>fa:16:3e:5e:ed:96 actions=NORMAL<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6712.130s, table=25, n_packets=36, n_bytes=3080, priority=2,in_port=7,dl_src=<wbr>fa:16:3e:e7:13:62 actions=NORMAL<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"> cookie=0xbc2e9105125301dc, duration=6555.801s, table=25, n_packets=0, n_bytes=0, priority=2,in_port=10,dl_src=<wbr>fa:16:3e:76:d9:98 actions=NORMAL<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
</div>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
</div></div></div>
</div>
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