[Openstack] [Neutron][Linuxbridge] Problem with configuring linux bridge agent with vxlan networks

[Sławek Kapłoński]

Hello,

I'm trying to configure small openstack infra (one network node, 2
compute nodes) with linux bridge and vxlan tenant networks. I don't know
what I'm doing wrong but my instances have no connection between
each other. On compute hosts I run neutron-plugin-linuxbrigde-agent
with config like:

------------------
[ml2_type_vxlan]
# (ListOpt) Comma-separated list of <vni_min>:<vni_max> tuples
# enumerating
# ranges of VXLAN VNI IDs that are available for tenant network
# allocation.
#
vni_ranges = 10000:20000

# (StrOpt) Multicast group for the VXLAN interface. When configured,
# will
# enable sending all broadcast traffic to this multicast group. When
# left
# unconfigured, will disable multicast VXLAN mode.
#
# vxlan_group =
# Example: vxlan_group = 239.1.1.1

[securitygroup]
# Controls if neutron security group is enabled or not.
# It should be false when you use nova security group.
enable_security_group = True

# Use ipset to speed-up the iptables security groups. Enabling ipset
# support
# requires that ipset is installed on L2 agent node.
enable_ipset = True

firewall_driver = neutron.agent.linux.iptables_firewall.IptablesFirewallDriver

[ovs]
local_ip = 10.1.0.4

[agent]
tunnel_types = vxlan

[linuxbridge]
physical_interface_mappings = physnet1:eth1

[vxlan]
local_ip = 10.1.0.4
l2_population = True
enable_vxlan = True
-------------------

Eth1 is my "tunnel network" which should be used for tunnels. When I
spawn vms on compute 1 and 2 and after configuring network manually on
both vms (dhcp is not working also because of broken tunnels probably)
it not pings.
Even when I started two instances on same host and they are both
connected to one bridge:

-------------------
***@compute-2:/usr/lib/python2.7/dist-packages/neutron# brctl show
bridge name bridge id STP enabled interfaces
brq8fe8a32f-e6 8000.ce544d0c0e5d no tap691a138a-6c
tapbc1e5179-53
vxlan-10052
virbr0 8000.5254007611ab yes virbr0-nic
-------------------

those 2 vms are not pinging each other :/
I don't have any expeirence with linux bridge in fact (For now I was always
using ovs). Maybe someone of You will know what I should check or what I should
configure wrong :/ Generally I was installing this openstack according to
official openstack documentation but in this docs there is info about ovs+gre
tunnels and that is what I changed. I'm using Ubuntu 14.04 and Openstack Kilo
installed from cloud archive repo.

[Matt Kassawara]

Did you review the scenarios in the networking guide [1]?

[1] http://docs.openstack.org/networking-guide/deploy.html

Post by Sławek Kapłoński
Hello,
I'm trying to configure small openstack infra (one network node, 2
compute nodes) with linux bridge and vxlan tenant networks. I don't know
what I'm doing wrong but my instances have no connection between
each other. On compute hosts I run neutron-plugin-linuxbrigde-agent
------------------
[ml2_type_vxlan]
# (ListOpt) Comma-separated list of <vni_min>:<vni_max> tuples
# enumerating
# ranges of VXLAN VNI IDs that are available for tenant network
# allocation.
#
vni_ranges = 10000:20000
# (StrOpt) Multicast group for the VXLAN interface. When configured,
# will
# enable sending all broadcast traffic to this multicast group. When
# left
# unconfigured, will disable multicast VXLAN mode.
#
# vxlan_group =
# Example: vxlan_group = 239.1.1.1
[securitygroup]
# Controls if neutron security group is enabled or not.
# It should be false when you use nova security group.
enable_security_group = True
# Use ipset to speed-up the iptables security groups. Enabling ipset
# support
# requires that ipset is installed on L2 agent node.
enable_ipset = True
firewall_driver =
neutron.agent.linux.iptables_firewall.IptablesFirewallDriver
[ovs]
local_ip = 10.1.0.4
[agent]
tunnel_types = vxlan
[linuxbridge]
physical_interface_mappings = physnet1:eth1
[vxlan]
local_ip = 10.1.0.4
l2_population = True
enable_vxlan = True
-------------------
Eth1 is my "tunnel network" which should be used for tunnels. When I
spawn vms on compute 1 and 2 and after configuring network manually on
both vms (dhcp is not working also because of broken tunnels probably)
it not pings.
Even when I started two instances on same host and they are both
-------------------
bridge name bridge id STP enabled interfaces
brq8fe8a32f-e6 8000.ce544d0c0e5d no
tap691a138a-6c
tapbc1e5179-53
vxlan-10052
virbr0 8000.5254007611ab yes virbr0-nic
-------------------
those 2 vms are not pinging each other :/
I don't have any expeirence with linux bridge in fact (For now I was always
using ovs). Maybe someone of You will know what I should check or what I should
configure wrong :/ Generally I was installing this openstack according to
official openstack documentation but in this docs there is info about ovs+gre
tunnels and that is what I changed. I'm using Ubuntu 14.04 and Openstack Kilo
installed from cloud archive repo.
--
Best regards / Pozdrawiam
Sławek Kapłoński
_______________________________________________
OpenStack-operators mailing list
http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators

[Sławek Kapłoński]

Hello,

Yes. I was reading mostly
http://docs.openstack.org/networking-guide/scenario_legacy_lb.html
because imho this is what I want now :). I don't want DVR and L3 HA (at
least for now) but only traffic via vxlan between two vms which are
connected to tenant network (it is probably called east-west traffic,
yes?)
--
Best regards / Pozdrawiam
Sławek Kapłoński

Post by Matt Kassawara
Did you review the scenarios in the networking guide [1]?
[1] http://docs.openstack.org/networking-guide/deploy.html

Post by Sławek Kapłoński
Hello,
I'm trying to configure small openstack infra (one network node, 2
compute nodes) with linux bridge and vxlan tenant networks. I don't know
what I'm doing wrong but my instances have no connection between
each other. On compute hosts I run neutron-plugin-linuxbrigde-agent
------------------
[ml2_type_vxlan]
# (ListOpt) Comma-separated list of <vni_min>:<vni_max> tuples
# enumerating
# ranges of VXLAN VNI IDs that are available for tenant network
# allocation.
#
vni_ranges = 10000:20000
# (StrOpt) Multicast group for the VXLAN interface. When configured,
# will
# enable sending all broadcast traffic to this multicast group. When
# left
# unconfigured, will disable multicast VXLAN mode.
#
# vxlan_group =
# Example: vxlan_group = 239.1.1.1
[securitygroup]
# Controls if neutron security group is enabled or not.
# It should be false when you use nova security group.
enable_security_group = True
# Use ipset to speed-up the iptables security groups. Enabling ipset
# support
# requires that ipset is installed on L2 agent node.
enable_ipset = True
firewall_driver =
neutron.agent.linux.iptables_firewall.IptablesFirewallDriver
[ovs]
local_ip = 10.1.0.4
[agent]
tunnel_types = vxlan
[linuxbridge]
physical_interface_mappings = physnet1:eth1
[vxlan]
local_ip = 10.1.0.4
l2_population = True
enable_vxlan = True
-------------------
Eth1 is my "tunnel network" which should be used for tunnels. When I
spawn vms on compute 1 and 2 and after configuring network manually on
both vms (dhcp is not working also because of broken tunnels probably)
it not pings.
Even when I started two instances on same host and they are both
-------------------
bridge name bridge id STP enabled interfaces
brq8fe8a32f-e6 8000.ce544d0c0e5d no
tap691a138a-6c
tapbc1e5179-53
vxlan-10052
virbr0 8000.5254007611ab yes virbr0-nic
-------------------
those 2 vms are not pinging each other :/
I don't have any expeirence with linux bridge in fact (For now I was always
using ovs). Maybe someone of You will know what I should check or what I should
configure wrong :/ Generally I was installing this openstack according to
official openstack documentation but in this docs there is info about ovs+gre
tunnels and that is what I changed. I'm using Ubuntu 14.04 and Openstack Kilo
installed from cloud archive repo.
--
Best regards / Pozdrawiam
Sławek Kapłoński
_______________________________________________
OpenStack-operators mailing list
http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators

[Andreas Scheuring]

Hi Sławek,

virbr0 belongs to the default libvirt network that is set up when you
install libvirt. It's not related to Openstack.

You should verify, that the vxlan port is open on both hypervisors
(default 4789 udp). This is not set up by Openstack but needs to be done
by the deployment tool or the deployer (if upstream Openstack)

In any case it's helpful to debug with tcpdump to see if packets are
leaving eth1 and if they are encapsulated. With tcpdump you also should
be able to figure out the used port if it is not 4789 (I don't know the
lb default)

But as mentioned before, my first guess is the vxlan port that needs to
be enabled in iptables by hand on each node (compute & network node).
--
Andreas
(IRC: scheuran)

Post by Sławek Kapłoński
Hello,
Yes. I was reading mostly
http://docs.openstack.org/networking-guide/scenario_legacy_lb.html
because imho this is what I want now :). I don't want DVR and L3 HA (at
least for now) but only traffic via vxlan between two vms which are
connected to tenant network (it is probably called east-west traffic,
yes?)
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[James Denton]

If eth1 is used for the vxlan tunnel end points, it can't also be used in a bridge ala provider_bridge_mappings. You should have a dedicated interface or a vlan interface off eth1 (i.e. Eth1.20) that is dedicated to the overlay traffic. Move the local_ip address to that interface on respective nodes. Verify that you can ping between nodes at each address. If this doesn't work, the Neutron pieces won't work. You shouldn't have to restart any neutron services, since the IP isn't changing.

Once you create a vxlan tenant network and boot some instances, verify that the vxlan interface is being setup and placed in the respective bridge. You can use 'brctl show' to look at the brq bridge that corresponds to the network. You should see a vxlan interface and the tap interfaces of your instances.

As always, verify your security groups first when troubleshooting instance to instance communication.

James

Sent from my iPhone

Post by Sławek Kapłoński
Hello,
I'm trying to configure small openstack infra (one network node, 2
compute nodes) with linux bridge and vxlan tenant networks. I don't know
what I'm doing wrong but my instances have no connection between
each other. On compute hosts I run neutron-plugin-linuxbrigde-agent
------------------
[ml2_type_vxlan]
# (ListOpt) Comma-separated list of <vni_min>:<vni_max> tuples
# enumerating
# ranges of VXLAN VNI IDs that are available for tenant network
# allocation.
#
vni_ranges = 10000:20000
# (StrOpt) Multicast group for the VXLAN interface. When configured,
# will
# enable sending all broadcast traffic to this multicast group. When
# left
# unconfigured, will disable multicast VXLAN mode.
#
# vxlan_group =
# Example: vxlan_group = 239.1.1.1
[securitygroup]
# Controls if neutron security group is enabled or not.
# It should be false when you use nova security group.
enable_security_group = True
# Use ipset to speed-up the iptables security groups. Enabling ipset
# support
# requires that ipset is installed on L2 agent node.
enable_ipset = True
firewall_driver = neutron.agent.linux.iptables_firewall.IptablesFirewallDriver
[ovs]
local_ip = 10.1.0.4
[agent]
tunnel_types = vxlan
[linuxbridge]
physical_interface_mappings = physnet1:eth1
[vxlan]
local_ip = 10.1.0.4
l2_population = True
enable_vxlan = True
-------------------
Eth1 is my "tunnel network" which should be used for tunnels. When I
spawn vms on compute 1 and 2 and after configuring network manually on
both vms (dhcp is not working also because of broken tunnels probably)
it not pings.
Even when I started two instances on same host and they are both
-------------------
bridge name bridge id STP enabled interfaces
brq8fe8a32f-e6 8000.ce544d0c0e5d no tap691a138a-6c
tapbc1e5179-53
vxlan-10052
virbr0 8000.5254007611ab yes virbr0-nic
-------------------
those 2 vms are not pinging each other :/
I don't have any expeirence with linux bridge in fact (For now I was always
using ovs). Maybe someone of You will know what I should check or what I should
configure wrong :/ Generally I was installing this openstack according to
official openstack documentation but in this docs there is info about ovs+gre
tunnels and that is what I changed. I'm using Ubuntu 14.04 and Openstack Kilo
installed from cloud archive repo.
--
Best regards / Pozdrawiam
Sławek Kapłoński
_______________________________________________
OpenStack-operators mailing list
http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators

[Sławek Kapłoński]

Hello,

This vlan bridge_mapping I set just to be sure if it will not help for
some reason :) Before I tested it without this mapping configured. And
in fact I'm not using vlan networks at all (at least now) - I only want
to have local vxlan network between instances :)
When I booted one instance on host in brqXXX bridge I got vxlan-10052
port and tapXXX port (10052 is vni used assigned to network in neutron).
After boot second vm I got in same bridge second tap interface so it
looks like:

***@compute-2:~# brctl show
bridge name bridge id STP enabled interfaces
brq8fe8a32f-e6 8000.ce544d0c0e5d no tap691a138a-6c
tapbc1e5179-53
vxlan-10052
virbr0 8000.5254007611ab yes virbr0-nic


So it looks fine for me. I have no idea what is this vibr0 bridge - maybe it
should be used somehow?

One more think. Those two vms on one host are pinging each other. So bridge
looks that is working fine. Problem is with vxlan tunnels.

About security groups: by default there is rule to allow traffic from different
vms using same SG. All my instances are using same security group so it should
be no problem IMHO.
--
Best regards / Pozdrawiam
Sławek Kapłoński

Post by James Denton
If eth1 is used for the vxlan tunnel end points, it can't also be used in a bridge ala provider_bridge_mappings. You should have a dedicated interface or a vlan interface off eth1 (i.e. Eth1.20) that is dedicated to the overlay traffic. Move the local_ip address to that interface on respective nodes. Verify that you can ping between nodes at each address. If this doesn't work, the Neutron pieces won't work. You shouldn't have to restart any neutron services, since the IP isn't changing.
Once you create a vxlan tenant network and boot some instances, verify that the vxlan interface is being setup and placed in the respective bridge. You can use 'brctl show' to look at the brq bridge that corresponds to the network. You should see a vxlan interface and the tap interfaces of your instances.
As always, verify your security groups first when troubleshooting instance to instance communication.
James
Sent from my iPhone

Post by Sławek Kapłoński
Hello,
I'm trying to configure small openstack infra (one network node, 2
compute nodes) with linux bridge and vxlan tenant networks. I don't know
what I'm doing wrong but my instances have no connection between
each other. On compute hosts I run neutron-plugin-linuxbrigde-agent
------------------
[ml2_type_vxlan]
# (ListOpt) Comma-separated list of <vni_min>:<vni_max> tuples
# enumerating
# ranges of VXLAN VNI IDs that are available for tenant network
# allocation.
#
vni_ranges = 10000:20000
# (StrOpt) Multicast group for the VXLAN interface. When configured,
# will
# enable sending all broadcast traffic to this multicast group. When
# left
# unconfigured, will disable multicast VXLAN mode.
#
# vxlan_group =
# Example: vxlan_group = 239.1.1.1
[securitygroup]
# Controls if neutron security group is enabled or not.
# It should be false when you use nova security group.
enable_security_group = True
# Use ipset to speed-up the iptables security groups. Enabling ipset
# support
# requires that ipset is installed on L2 agent node.
enable_ipset = True
firewall_driver = neutron.agent.linux.iptables_firewall.IptablesFirewallDriver
[ovs]
local_ip = 10.1.0.4
[agent]
tunnel_types = vxlan
[linuxbridge]
physical_interface_mappings = physnet1:eth1
[vxlan]
local_ip = 10.1.0.4
l2_population = True
enable_vxlan = True
-------------------
Eth1 is my "tunnel network" which should be used for tunnels. When I
spawn vms on compute 1 and 2 and after configuring network manually on
both vms (dhcp is not working also because of broken tunnels probably)
it not pings.
Even when I started two instances on same host and they are both
-------------------
bridge name bridge id STP enabled interfaces
brq8fe8a32f-e6 8000.ce544d0c0e5d no tap691a138a-6c
tapbc1e5179-53
vxlan-10052
virbr0 8000.5254007611ab yes virbr0-nic
-------------------
those 2 vms are not pinging each other :/
I don't have any expeirence with linux bridge in fact (For now I was always
using ovs). Maybe someone of You will know what I should check or what I should
configure wrong :/ Generally I was installing this openstack according to
official openstack documentation but in this docs there is info about ovs+gre
tunnels and that is what I changed. I'm using Ubuntu 14.04 and Openstack Kilo
installed from cloud archive repo.
--
Best regards / Pozdrawiam
Sławek Kapłoński
_______________________________________________
OpenStack-operators mailing list
http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators

[Sławek Kapłoński]

Hello,

I'm configuring it manually. DHCP is not working because vxlan tunnels
are not working at all :/
Compute nodes and network nodes con ping each other:

***@network:~$ ping 10.1.0.4
PING 10.1.0.4 (10.1.0.4) 56(84) bytes of data.
64 bytes from 10.1.0.4: icmp_seq=1 ttl=64 time=8.83 ms
64 bytes from 10.1.0.4: icmp_seq=2 ttl=64 time=0.282 ms
^C
--- 10.1.0.4 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 0.282/4.560/8.838/4.278 ms
--
Best regards / Pozdrawiam
Sławek Kapłoński

Are your instances getting their ip from DHCP server or are you manually configuring them? Can the network node ping the compute node at 10.1.0.4 and vice-versa?
Sent from my iPhone

Post by Sławek Kapłoński
This vlan bridge_mapping I set just to be sure if it will not help for
some reason :) Before I tested it without this mapping configured. And
in fact I'm not using vlan networks at all (at least now) - I only want
to have local vxlan network between instances :)
When I booted one instance on host in brqXXX bridge I got vxlan-10052
port and tapXXX port (10052 is vni used assigned to network in neutron).
After boot second vm I got in same bridge second tap interface so it
bridge name bridge id STP enabled interfaces
brq8fe8a32f-e6 8000.ce544d0c0e5d no tap691a138a-6c
tapbc1e5179-53
vxlan-10052
virbr0 8000.5254007611ab yes virbr0-nic
So it looks fine for me. I have no idea what is this vibr0 bridge - maybe it
should be used somehow?
One more think. Those two vms on one host are pinging each other. So bridge
looks that is working fine. Problem is with vxlan tunnels.
About security groups: by default there is rule to allow traffic from different
vms using same SG. All my instances are using same security group so it should
be no problem IMHO.
--
Best regards / Pozdrawiam
Sławek Kapłoński

Post by James Denton
If eth1 is used for the vxlan tunnel end points, it can't also be used in a bridge ala provider_bridge_mappings. You should have a dedicated interface or a vlan interface off eth1 (i.e. Eth1.20) that is dedicated to the overlay traffic. Move the local_ip address to that interface on respective nodes. Verify that you can ping between nodes at each address. If this doesn't work, the Neutron pieces won't work. You shouldn't have to restart any neutron services, since the IP isn't changing.
Once you create a vxlan tenant network and boot some instances, verify that the vxlan interface is being setup and placed in the respective bridge. You can use 'brctl show' to look at the brq bridge that corresponds to the network. You should see a vxlan interface and the tap interfaces of your instances.
As always, verify your security groups first when troubleshooting instance to instance communication.
James
Sent from my iPhone

Post by Sławek Kapłoński
Hello,
I'm trying to configure small openstack infra (one network node, 2
compute nodes) with linux bridge and vxlan tenant networks. I don't know
what I'm doing wrong but my instances have no connection between
each other. On compute hosts I run neutron-plugin-linuxbrigde-agent
------------------
[ml2_type_vxlan]
# (ListOpt) Comma-separated list of <vni_min>:<vni_max> tuples
# enumerating
# ranges of VXLAN VNI IDs that are available for tenant network
# allocation.
#
vni_ranges = 10000:20000
# (StrOpt) Multicast group for the VXLAN interface. When configured,
# will
# enable sending all broadcast traffic to this multicast group. When
# left
# unconfigured, will disable multicast VXLAN mode.
#
# vxlan_group =
# Example: vxlan_group = 239.1.1.1
[securitygroup]
# Controls if neutron security group is enabled or not.
# It should be false when you use nova security group.
enable_security_group = True
# Use ipset to speed-up the iptables security groups. Enabling ipset
# support
# requires that ipset is installed on L2 agent node.
enable_ipset = True
firewall_driver = neutron.agent.linux.iptables_firewall.IptablesFirewallDriver
[ovs]
local_ip = 10.1.0.4
[agent]
tunnel_types = vxlan
[linuxbridge]
physical_interface_mappings = physnet1:eth1
[vxlan]
local_ip = 10.1.0.4
l2_population = True
enable_vxlan = True
-------------------
Eth1 is my "tunnel network" which should be used for tunnels. When I
spawn vms on compute 1 and 2 and after configuring network manually on
both vms (dhcp is not working also because of broken tunnels probably)
it not pings.
Even when I started two instances on same host and they are both
-------------------
bridge name bridge id STP enabled interfaces
brq8fe8a32f-e6 8000.ce544d0c0e5d no tap691a138a-6c
tapbc1e5179-53
vxlan-10052
virbr0 8000.5254007611ab yes virbr0-nic
-------------------
those 2 vms are not pinging each other :/
I don't have any expeirence with linux bridge in fact (For now I was always
using ovs). Maybe someone of You will know what I should check or what I should
configure wrong :/ Generally I was installing this openstack according to
official openstack documentation but in this docs there is info about ovs+gre
tunnels and that is what I changed. I'm using Ubuntu 14.04 and Openstack Kilo
installed from cloud archive repo.
--
Best regards / Pozdrawiam
Sławek Kapłoński
_______________________________________________
OpenStack-operators mailing list
http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators

[Sławek Kapłoński]

Hello,

On my compute hosts I don't have any rules except those which neutron
agent is creating.
--
Best regards / Pozdrawiam
Sławek Kapłoński

One thing that I always forget is iptables rules to allow the udp port 8472 vxlan packets in.

Post by Sławek Kapłoński
Hello,
I'm trying to configure small openstack infra (one network node, 2
compute nodes) with linux bridge and vxlan tenant networks. I don't know
what I'm doing wrong but my instances have no connection between
each other. On compute hosts I run neutron-plugin-linuxbrigde-agent
------------------
[ml2_type_vxlan]
# (ListOpt) Comma-separated list of <vni_min>:<vni_max> tuples
# enumerating
# ranges of VXLAN VNI IDs that are available for tenant network
# allocation.
#
vni_ranges = 10000:20000
# (StrOpt) Multicast group for the VXLAN interface. When configured,
# will
# enable sending all broadcast traffic to this multicast group. When
# left
# unconfigured, will disable multicast VXLAN mode.
#
# vxlan_group =
# Example: vxlan_group = 239.1.1.1
[securitygroup]
# Controls if neutron security group is enabled or not.
# It should be false when you use nova security group.
enable_security_group = True
# Use ipset to speed-up the iptables security groups. Enabling ipset
# support
# requires that ipset is installed on L2 agent node.
enable_ipset = True
firewall_driver = neutron.agent.linux.iptables_firewall.IptablesFirewallDriver
[ovs]
local_ip = 10.1.0.4
[agent]
tunnel_types = vxlan
[linuxbridge]
physical_interface_mappings = physnet1:eth1
[vxlan]
local_ip = 10.1.0.4
l2_population = True
enable_vxlan = True
-------------------
Eth1 is my "tunnel network" which should be used for tunnels. When I
spawn vms on compute 1 and 2 and after configuring network manually on
both vms (dhcp is not working also because of broken tunnels probably)
it not pings.
Even when I started two instances on same host and they are both
-------------------
bridge name bridge id STP enabled interfaces
brq8fe8a32f-e6 8000.ce544d0c0e5d no tap691a138a-6c
tapbc1e5179-53
vxlan-10052
virbr0 8000.5254007611ab yes virbr0-nic
-------------------
those 2 vms are not pinging each other :/
I don't have any expeirence with linux bridge in fact (For now I was always
using ovs). Maybe someone of You will know what I should check or what I should
configure wrong :/ Generally I was installing this openstack according to
official openstack documentation but in this docs there is info about ovs+gre
tunnels and that is what I changed. I'm using Ubuntu 14.04 and Openstack Kilo
installed from cloud archive repo.
--
Best regards / Pozdrawiam
Sławek Kapłoński
_______________________________________________
OpenStack-operators mailing list
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