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Hi all,

Thanks Vincent for this confimation. I've noticed that error to the team
here [1].
I think it could be interesting to update the wiki in order to signal new
comer the network requirements for building a chain.

@ Cathy: I can create port chain but it just works once for me. After
analysing OVS entries, it's probably due to flows misconfiguration.

Regards,

[1] http://lists.openstack.org/pipermail/openstack-dev/2016-
August/101817.html

On 1 September 2016 at 04:42, Vincent.Chao <vincentchao99 at gmail.com
<javascript:_e(%7B%7D,'cvml','vincentchao99 at gmail.com');>> wrote:

> Hi Neutrons,
>
> I met this situation once in the release Liberty.
> Here is the thing.
> When the create_port_chain() is called, (@networking-sfc/networking_sf
> c/services/sfc/drivers/ovs/driver.py)
> it goes the following code path
>    -> _thread_update_path_nodes()
>    ->_update_path_node_flowrules()
>    ->_update_path_node_port_flowrules()
>    ->_build_portchain_flowrule_body()
>    ->_update_path_node_next_hops()
>    ->_get_port_subnet_gw_info_by_port_id
>    ->_get_port_subnet_gw_info()    raise exc.SfcNoSubnetGateway
> if you didn't give the network a router, it raises SfcNoSubnetGateway .
> And then back to the plugin.py: create_port_chain(), cache the exception
> sfc_exc.SfcDriverError as e
> In this exception, there is a delete_port_chain() method.
> But due to the synchronization problem between DB and ovs-bridge, it will
> delete failure.
> I hope this info. could help anyone who uses a liberty version.
> Next time, don't forget giving a router before creating a port chain.
>
> I don't see this code path in the master branch.
> It may be better in mitaka.
>
> Thanks
> Vincent
>
>
>
> 2016-08-31 2:19 GMT+08:00 Cathy Zhang <Cathy.H.Zhang at huawei.com
> <javascript:_e(%7B%7D,'cvml','Cathy.H.Zhang at huawei.com');>>:
>
>> Hi Alioune,
>>
>>
>>
>> It is weird that when you create a port chain, you get a “chain delete
>> failed” error message.
>>
>> We never had this problem. Chain deletion is only involved when you do
>> “delete chain” or “update chain”.
>>
>> 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.
>>
>> We are going to release the networking-sfc mitaka version soon.
>>
>> I would suggest that you wait a little bit and then use the official
>> released mitaka version and reinstall the feature on your system.
>>
>>
>>
>> Thanks,
>>
>> Cathy
>>
>>
>>
>> *From:* Alioune [mailto:balioune3 at gmail.com
>> <javascript:_e(%7B%7D,'cvml','balioune3 at gmail.com');>]
>> *Sent:* Tuesday, August 30, 2016 8:03 AM
>> *To:* OpenStack Development Mailing List (not for usage questions)
>> *Cc:* Cathy Zhang; Mohan Kumar; Henry Fourie
>> *Subject:* Re: [openstack-dev][neutron][networking-sfc] Unable to create
>> openstack SFC
>>
>>
>>
>> Hi,
>>
>> Have you received my previous email ?
>>
>>
>>
>> Regards,
>>
>>
>>
>> On 15 August 2016 at 13:39, Alioune <balioune3 at gmail.com
>> <javascript:_e(%7B%7D,'cvml','balioune3 at gmail.com');>> wrote:
>>
>> Hi all,
>>
>> 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.
>>
>> I've installed OVS (Open vSwitch) 2.3.90 with Linux kernel 3.13.0-62 and
>> the neutron L2-agent runs correctly.
>>
>> 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]
>>
>> 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.
>>
>>
>>
>> Can anyone advice to fix? that ?
>>
>> What's your channel on IRC ?
>>
>>
>>
>> Regards,
>>
>>
>>
>>
>>
>> [1] https://wiki.openstack.org/wiki/Neutron/ServiceInsertionAndChaining
>>
>> [2]
>>
>> vagrant at ubuntu:~/openstack_sfc$ ./08-os_create_port_chain.sh
>>
>> delete_port_chain failed.
>>
>> vagrant at ubuntu:~/openstack_sfc$ cat 08-os_create_port_chain.sh
>>
>> #!/bin/bash
>>
>>
>>
>> neutron port-chain-create --port-pair-group PG1 --port-pair-group PG2
>> --flow-classifier FC1 PC1
>>
>>
>>
>> [3] Output OVS Flows
>>
>>
>>
>> vagrant at ubuntu:~$ sudo ovs-ofctl dump-flows br-tun -O OpenFlow13
>>
>> OFPST_FLOW reply (OF1.3) (xid=0x2):
>>
>>  cookie=0xbc2e9105125301dc, duration=9615.385s, table=0, n_packets=146,
>> n_bytes=11534, priority=1,in_port=1 actions=resubmit(,2)
>>
>>  cookie=0xbc2e9105125301dc, duration=9615.382s, table=0, n_packets=0,
>> n_bytes=0, priority=0 actions=drop
>>
>>  cookie=0xbc2e9105125301dc, duration=9615.382s, table=2, n_packets=5,
>> n_bytes=490, priority=0,dl_dst=00:00:00:00:00:00/01:00:00:00:00:00
>> actions=resubmit(,20)
>>
>>  cookie=0xbc2e9105125301dc, duration=9615.381s, table=2, n_packets=141,
>> n_bytes=11044, priority=0,dl_dst=01:00:00:00:00:00/01:00:00:00:00:00
>> actions=resubmit(,22)
>>
>>  cookie=0xbc2e9105125301dc, duration=9615.380s, table=3, n_packets=0,
>> n_bytes=0, priority=0 actions=drop
>>
>>  cookie=0xbc2e9105125301dc, duration=9615.380s, table=4, n_packets=0,
>> n_bytes=0, priority=0 actions=drop
>>
>>  cookie=0xbc2e9105125301dc, duration=8617.106s, table=4, n_packets=0,
>> n_bytes=0, priority=1,tun_id=0x40e actions=push_vlan:0x8100,set_f
>> ield:4097->vlan_vid,resubmit(,10)
>>
>>  cookie=0xbc2e9105125301dc, duration=9615.379s, table=6, n_packets=0,
>> n_bytes=0, priority=0 actions=drop
>>
>>  cookie=0xbc2e9105125301dc, duration=9615.379s, table=10, n_packets=0,
>> n_bytes=0, priority=1 actions=learn(table=20,hard_ti
>> meout=300,priority=1,cookie=0xbc2e9105125301dc,NXM_OF_VLAN_T
>> CI[0..11],NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[],load:0->NXM_OF_V
>> LAN_TCI[],load:NXM_NX_TUN_ID[]->NXM_NX_TUN_ID[],output:NXM_O
>> F_IN_PORT[]),output:1
>>
>>  cookie=0xbc2e9105125301dc, duration=9615.378s, table=20, n_packets=5,
>> n_bytes=490, priority=0 actions=resubmit(,22)
>>
>>  cookie=0xbc2e9105125301dc, duration=9615.342s, table=22, n_packets=146,
>> n_bytes=11534, priority=0 actions=drop
>>
>> vagrant at ubuntu:~$ sudo ovs-ofctl dump-flows br-int -O OpenFlow13
>>
>> OFPST_FLOW reply (OF1.3) (xid=0x2):
>>
>>  cookie=0xbc2e9105125301dc, duration=6712.090s, table=0, n_packets=0,
>> n_bytes=0, priority=10,icmp6,in_port=7,icmp_type=136
>> actions=resubmit(,24)
>>
>>  cookie=0xbc2e9105125301dc, duration=6709.623s, table=0, n_packets=0,
>> n_bytes=0, priority=10,icmp6,in_port=8,icmp_type=136
>> actions=resubmit(,24)
>>
>>  cookie=0xbc2e9105125301dc, duration=6555.755s, table=0, n_packets=0,
>> n_bytes=0, priority=10,icmp6,in_port=10,icmp_type=136
>> actions=resubmit(,24)
>>
>>  cookie=0xbc2e9105125301dc, duration=6559.596s, table=0, n_packets=0,
>> n_bytes=0, priority=10,icmp6,in_port=9,icmp_type=136
>> actions=resubmit(,24)
>>
>>  cookie=0xbc2e9105125301dc, duration=6461.028s, table=0, n_packets=0,
>> n_bytes=0, priority=10,icmp6,in_port=11,icmp_type=136
>> actions=resubmit(,24)
>>
>>  cookie=0xbc2e9105125301dc, duration=6712.071s, table=0, n_packets=13,
>> n_bytes=546, priority=10,arp,in_port=7 actions=resubmit(,24)
>>
>>  cookie=0xbc2e9105125301dc, duration=6709.602s, table=0, n_packets=0,
>> n_bytes=0, priority=10,arp,in_port=8 actions=resubmit(,24)
>>
>>  cookie=0xbc2e9105125301dc, duration=6555.727s, table=0, n_packets=0,
>> n_bytes=0, priority=10,arp,in_port=10 actions=resubmit(,24)
>>
>>  cookie=0xbc2e9105125301dc, duration=6559.574s, table=0, n_packets=12,
>> n_bytes=504, priority=10,arp,in_port=9 actions=resubmit(,24)
>>
>>  cookie=0xbc2e9105125301dc, duration=6461.005s, table=0, n_packets=15,
>> n_bytes=630, priority=10,arp,in_port=11 actions=resubmit(,24)
>>
>>  cookie=0xbc2e9105125301dc, duration=9620.388s, table=0, n_packets=514,
>> n_bytes=49656, priority=0 actions=NORMAL
>>
>>  cookie=0xbc2e9105125301dc, duration=9619.277s, table=0, n_packets=0,
>> n_bytes=0, priority=20,mpls actions=resubmit(,10)
>>
>>  cookie=0xbc2e9105125301dc, duration=6712.111s, table=0, n_packets=25,
>> n_bytes=2674, priority=9,in_port=7 actions=resubmit(,25)
>>
>>  cookie=0xbc2e9105125301dc, duration=6559.621s, table=0, n_packets=24,
>> n_bytes=2576, priority=9,in_port=9 actions=resubmit(,25)
>>
>>  cookie=0xbc2e9105125301dc, duration=6555.777s, table=0, n_packets=2,
>> n_bytes=140, priority=9,in_port=10 actions=resubmit(,25)
>>
>>  cookie=0xbc2e9105125301dc, duration=6461.082s, table=0, n_packets=47,
>> n_bytes=4830, priority=9,in_port=11 actions=resubmit(,25)
>>
>>  cookie=0xbc2e9105125301dc, duration=6709.646s, table=0, n_packets=3,
>> n_bytes=230, priority=9,in_port=8 actions=resubmit(,25)
>>
>>  cookie=0xbc2e9105125301dc, duration=9619.265s, table=10, n_packets=0,
>> n_bytes=0, priority=0 actions=drop
>>
>>  cookie=0xbc2e9105125301dc, duration=9620.378s, table=23, n_packets=0,
>> n_bytes=0, priority=0 actions=drop
>>
>>  cookie=0xbc2e9105125301dc, duration=9620.368s, table=24, n_packets=0,
>> n_bytes=0, priority=0 actions=drop
>>
>>  cookie=0xbc2e9105125301dc, duration=6709.633s, table=24, n_packets=0,
>> n_bytes=0, priority=2,icmp6,in_port=8,icmp_type=136,nd_target=fe80::f816:3eff:fe2a:fe
>> actions=NORMAL
>>
>>  cookie=0xbc2e9105125301dc, duration=6712.101s, table=24, n_packets=0,
>> n_bytes=0, priority=2,icmp6,in_port=7,icmp_type=136,nd_target=fe80::f816:3eff:fee7:1362
>> actions=NORMAL
>>
>>  cookie=0xbc2e9105125301dc, duration=6559.607s, table=24, n_packets=0,
>> n_bytes=0, priority=2,icmp6,in_port=9,icmp_type=136,nd_target=fe80::f816:3eff:fe91:95ee
>> actions=NORMAL
>>
>>  cookie=0xbc2e9105125301dc, duration=6555.766s, table=24, n_packets=0,
>> n_bytes=0, priority=2,icmp6,in_port=10,icmp_type=136,nd_target=fe80::f816:3eff:fe76:d998
>> actions=NORMAL
>>
>>  cookie=0xbc2e9105125301dc, duration=6461.055s, table=24, n_packets=0,
>> n_bytes=0, priority=2,icmp6,in_port=11,icmp_type=136,nd_target=fe80::f816:3eff:fe5e:ed96
>> actions=NORMAL
>>
>>  cookie=0xbc2e9105125301dc, duration=6709.611s, table=24, n_packets=0,
>> n_bytes=0, priority=2,arp,in_port=8,arp_spa=55.55.55.12
>> actions=resubmit(,25)
>>
>>  cookie=0xbc2e9105125301dc, duration=6555.741s, table=24, n_packets=0,
>> n_bytes=0, priority=2,arp,in_port=10,arp_spa=55.55.55.14
>> actions=resubmit(,25)
>>
>>  cookie=0xbc2e9105125301dc, duration=6712.080s, table=24, n_packets=13,
>> n_bytes=546, priority=2,arp,in_port=7,arp_spa=55.55.55.11
>> actions=resubmit(,25)
>>
>>  cookie=0xbc2e9105125301dc, duration=6559.584s, table=24, n_packets=12,
>> n_bytes=504, priority=2,arp,in_port=9,arp_spa=55.55.55.13
>> actions=resubmit(,25)
>>
>>  cookie=0xbc2e9105125301dc, duration=6461.015s, table=24, n_packets=15,
>> n_bytes=630, priority=2,arp,in_port=11,arp_spa=55.55.55.15
>> actions=resubmit(,25)
>>
>>  cookie=0xbc2e9105125301dc, duration=6709.714s, table=25, n_packets=0,
>> n_bytes=0, priority=2,in_port=8,dl_src=fa:16:3e:2a:00:fe actions=NORMAL
>>
>>  cookie=0xbc2e9105125301dc, duration=6559.641s, table=25, n_packets=34,
>> n_bytes=2940, priority=2,in_port=9,dl_src=fa:16:3e:91:95:ee
>> actions=NORMAL
>>
>>  cookie=0xbc2e9105125301dc, duration=6461.117s, table=25, n_packets=60,
>> n_bytes=5320, priority=2,in_port=11,dl_src=fa:16:3e:5e:ed:96
>> actions=NORMAL
>>
>>  cookie=0xbc2e9105125301dc, duration=6712.130s, table=25, n_packets=36,
>> n_bytes=3080, priority=2,in_port=7,dl_src=fa:16:3e:e7:13:62
>> actions=NORMAL
>>
>>  cookie=0xbc2e9105125301dc, duration=6555.801s, table=25, n_packets=0,
>> n_bytes=0, priority=2,in_port=10,dl_src=fa:16:3e:76:d9:98 actions=NORMAL
>>
>>
>>
>>
>>
>> ____________________________________________________________
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