Open Stack

Dear Benjamin, Volodymyr,

good question ;) ... I like to experiment with some kind of "Firewall 
NFV" ... but in the first step, I want to build a Router VM between two 
networks (and later extend it with some flow rules) ... OpenStack, in my 
case, is more a foundation to build a "test environment" for my "own" 
application ... please find attached a quick sketch of the current 
network ...
I did this already before with iptables inside the middle instance ... 
worked quite well ... but know I like to achieve the same with OVS ...
I didn't expect that it is so much more difficult ;) ...

I'm currently checking Volodymyrs answer ... I think first point is now 
solved ... I "patched" now OVSbr1 and OVSbr2 inside the VM together (see 
OVpatch file)... but I think this is important later when I really like 
to ping from VM1 to VM2 ... but in the moment I only ping from VM1 to 
the TestNFV ... but the arp requests only reaches ens4 but not OVSbr1 
(according to tcpdump)...

May it have to do with port security and the (for OpenStack) unknown MAC 
address of the OVS bridge?

Thanks so far ...

Mathias.





On 2018-02-01 14:28, Benjamin Diaz wrote:
> Dear Mathias,
> 
> Could you attach a diagram of your network configuration and of what
> you are trying to achieve?
> Are you trying to install OVS inside a VM? If so, why?
> 
> Greetings,
> Benjamin
> 
> On Thu, Feb 1, 2018 at 8:30 AM, Volodymyr Litovka <doka.ua at gmx.com>
> wrote:
> 
>> Dear Mathias,
>> 
>> if I correctly understand your configuration, you're using bridges
>> inside VM and it configuration looks a bit strange:
>> 
>> 1) you use two different bridges (OVSbr1/192.168.120.x and
>> OVSbr2/192.168.110.x) and there is no patch between them so they're
>> separate
>> 2) while ARP requests for address in OVSbr1 arrives from OVSbr2:
>> 
>>> 18:50:58.080478 ARP, Request who-has 192.168.120.10 tell
>> 192.168.120.6, length 28
>>> 
>>> but on the OVS bridge nothing arrives ...
>>> 
>>> listening on OVSBR2, link-type EN10MB (Ethernet), capture size
>>> 262144 bytes
>> 
>> while these bridges are separate, ARP requests and answers will not
>> be passed between them.
>> 
>> Regarding your devstack configuration - unfortunately, I don't have
>> experience with devstack, so don't know, where it stores configs. In
>> Openstack, ml2_conf.ini points to openvswitch in ml2's
>> mechanism_drivers parameter, in my case it looks as the following:
>> 
>> [ml2]
>> mechanism_drivers = l2population,openvswitch
>> 
>> and rest of openvswitch config described in
>> /etc/neutron/plugins/ml2/openvswitch_agent.ini
>> 
>> Second - I see an ambiguity in your br-tun configuration, where
>> patch_int is the same as patch-int without corresponding remote peer
>> config, probably you should check this issue.
>> 
>> And third is - note that Mitaka is quite old release and probably
>> you can give a chance for the latest release of devstack? :-)
>> 
>> On 1/31/18 10:49 PM, Mathias Strufe (DFKI) wrote:
>> Dear Volodymyr, all,
>> 
>> thanks for your fast answer ...
>> but I'm still facing the same problem, still can't ping the
>> instance with configured and up OVS bridge ... may because I'm quite
>> new to OpenStack and OpenVswitch and didn't see the problem ;)
>> 
>> My setup is devstack Mitaka in single machine config ... first of
>> all I didn't find there the openvswitch_agent.ini anymore, I
>> remember in previous version it was in the neutron/plugin folder ...
>> 
>> Is this config now done in the ml2 config file in the [OVS]
>> section????
>> 
>> I'm really wondering ...
>> so I can ping between the 2 instances without any problem. But as
>> soon I bring up the OVS bridge inside the vm the ARP requests only
>> visible at the ens interface but not reaching the OVSbr ...
>> 
>> please find attached two files which may help for troubleshooting.
>> One are some network information from inside the Instance that runs
>> the OVS and one ovs-vsctl info of the OpenStack Host.
>> 
>> If you need more info/logs please let me know! Thanks for your
>> help!
>> 
>> BR Mathias.
>> 
>> On 2018-01-27 22:44, Volodymyr Litovka wrote:
>> Hi Mathias,
>> 
>> whether you have all corresponding bridges and patches between
>> them
>> as described in openvswitch_agent.ini using
>> 
>> integration_bridge
>> tunnel_bridge
>> int_peer_patch_port
>> tun_peer_patch_port
>> bridge_mappings
>> 
>> parameters? And make sure, that service "neutron-ovs-cleanup" is
>> in
>> use during system boot. You can check these bridges and patches
>> using
>> "ovs-vsctl show" command.
>> 
>> On 1/27/18 9:00 PM, Mathias Strufe (DFKI) wrote:
>> 
>> Dear all,
>> 
>> I'm quite new to openstack and like to install openVSwtich inside
>> one Instance of our Mitika openstack Lab Enviornment ...
>> But it seems that ARP packets got lost between the network
>> interface of the instance and the OVS bridge ...
>> 
>> With tcpdump on the interface I see the APR packets ...
>> 
>> tcpdump: verbose output suppressed, use -v or -vv for full protocol
>> 
>> decode
>> listening on ens6, link-type EN10MB (Ethernet), capture size 262144
>> 
>> bytes
>> 18:50:58.080478 ARP, Request who-has 192.168.120.10 tell
>> 192.168.120.6, length 28
>> 18:50:58.125009 ARP, Request who-has 192.168.120.1 tell
>> 192.168.120.6, length 28
>> 18:50:59.077315 ARP, Request who-has 192.168.120.10 tell
>> 192.168.120.6, length 28
>> 18:50:59.121369 ARP, Request who-has 192.168.120.1 tell
>> 192.168.120.6, length 28
>> 18:51:00.077327 ARP, Request who-has 192.168.120.10 tell
>> 192.168.120.6, length 28
>> 18:51:00.121343 ARP, Request who-has 192.168.120.1 tell
>> 192.168.120.6, length 28
>> 
>> but on the OVS bridge nothing arrives ...
>> 
>> tcpdump: verbose output suppressed, use -v or -vv for full protocol
>> 
>> decode
>> listening on OVSbr2, link-type EN10MB (Ethernet), capture size
>> 262144 bytes
>> 
>> I disabled port_security and removed the security group but nothing
>> 
>> changed
>> 
>> 
> +-----------------------+---------------------------------------------------------------------------------------+
>> 
>> 
>> | Field | Value
>> |
>> 
>> 
> +-----------------------+---------------------------------------------------------------------------------------+
>> 
>> 
>> | admin_state_up | True
>> |
>> | allowed_address_pairs |
>> |
>> | binding:host_id | node11
>> |
>> | binding:profile | {}
>> |
>> | binding:vif_details | {"port_filter": true, "ovs_hybrid_plug":
>> true} |
>> | binding:vif_type | ovs
>> |
>> | binding:vnic_type | normal
>> |
>> | created_at | 2018-01-27T16:45:48Z
>> |
>> | description |
>> |
>> | device_id | 74916967-984c-4617-ae33-b847de73de13
>> |
>> | device_owner | compute:nova
>> |
>> | extra_dhcp_opts |
>> |
>> | fixed_ips | {"subnet_id":
>> "525db7ff-2bf2-4c64-b41e-1e41570ec358", "ip_address":
>> "192.168.120.10"} |
>> | id | 74b754d6-0000-4c2e-bfd1-87f640154ac9
>> |
>> | mac_address | fa:16:3e:af:90:0c
>> |
>> | name |
>> |
>> | network_id | 917254cb-9721-4207-99c5-8ead9f95d186
>> |
>> | port_security_enabled | False
>> |
>> | project_id | c48457e73b664147a3d2d36d75dcd155
>> |
>> | revision_number | 27
>> |
>> | security_groups |
>> |
>> | status | ACTIVE
>> |
>> | tenant_id | c48457e73b664147a3d2d36d75dcd155
>> |
>> | updated_at | 2018-01-27T18:54:24Z
>> |
>> 
>> 
> +-----------------------+---------------------------------------------------------------------------------------+
>> 
>> 
>> maybe the port_filter causes still the problem? But how to disable
>> it?
>> 
>> Any other idea?
>> 
>> Thanks and BR Mathias.
>> 
>> _______________________________________________
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>> [1]
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>> [1]
>> 
>> --
>> Volodymyr Litovka
>> "Vision without Execution is Hallucination." -- Thomas Edison
>> 
>> Links:
>> ------
>> [1] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>> [1]
> 
> --
> Volodymyr Litovka
>  "Vision without Execution is Hallucination." -- Thomas Edison
> 
> _______________________________________________
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>  Post to     : openstack at lists.openstack.org
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> 
> --
> 
> BENJAMÍN DÍAZ
> Cloud Computing Engineer
> 
>  bdiaz at whitestack.com
> 
> Links:
> ------
> [1] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack

-- 
Vielen Dank und Gruß Mathias.
Many Thanks and kind regards, Mathias.

--
Dipl.-Ing. (FH) Mathias Strufe
Wissenschaftlicher Mitarbeiter / Researcher
Intelligente Netze / Intelligent Networks

Phone: +49 (0) 631 205 75 - 1826
Fax:   +49 (0) 631 205 75 – 4400

E-Mail: Mathias.Strufe at dfki.de
WWW: http://www.dfki.de/web/forschung/in

WWW: https://selfnet-5g.eu/

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