[Openstack] [neutron] Network node can't see external network
David Pintor
hiya at davidpint.org
Thu Aug 28 07:53:24 UTC 2014
Hi,
After sorting this out, I found out that my VMs weren't able to get
an IP via DHCP.
After a lot of troubleshooting, I fixed it by enabling IP forwarding
(net.ipv4.ip_forward=1) in the compute node (which is actually not
mentioned in the documentation:
http://docs.openstack.org/icehouse/install-guide/install/yum/content/neutron-ml2-compute-node.html)
I'm not quite sure whether this has been omitted by mistake or
whether my configuration could be wrong somewhere else.
Any thoughts? Anyone out there with a similar 3-node configuration?
Thanks,
David
> On 22/08/2014 16:51, Remo Mattei wrote:
>> Your br-ex does not have an ip your eth2 should not have the ip
>> which
>> is correct.
>>
>> Try that.
>>
>> Remo
>>
>> Inviato da IPad ()
>>
>>> Il giorno Aug 22, 2014, alle ore 5:05, David Pintor
>>> <hiya at davidpint.org> ha scritto:
>>>
>>> Hi,
>>>
>>> I have followed the Icehouse doc to install a 3 node environment in
>>> CentOS:
>>> http://docs.openstack.org/icehouse/install-guide/install/yum/content/basics-neutron-networking-network-node.html
>>>
>>> In my network node, my external NIC is configured witout IP as per
>>> the documentation.
>>>
>>> [root at network ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth2
>>> DEVICE=eth2
>>> UUID=4a1e4bc2-dac3-4c0a-985a-5a4a2203196e
>>> BOOTPROTO=none
>>> ONBOOT=yes
>>> TYPE=Ethernet
>>> HWADDR=00:0c:29:8d:cc:0a
>>>
>>>
>>> However I cannot ping the external network (.80 is the virtual
>>> router).
>>>
>>> [root at network ~]# ping 192.168.50.80
>>> PING 192.168.50.80 (192.168.50.80) 56(84) bytes of data.
>>> From 10.0.0.21 icmp_seq=1 Destination Host Unreachable
>>> From 10.0.0.21 icmp_seq=2 Destination Host Unreachable
>>> From 10.0.0.21 icmp_seq=3 Destination Host Unreachable
>>>
>>>
>>> This is the info of my environment:
>>>
>>>
>>> [root at network ~]# ip a
>>> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
>>> link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
>>> inet 127.0.0.1/8 scope host lo
>>> inet6 ::1/128 scope host
>>> valid_lft forever preferred_lft forever
>>> 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
>>> pfifo_fast state UP qlen 1000
>>> link/ether 00:0c:29:8d:cc:f6 brd ff:ff:ff:ff:ff:ff
>>> inet 10.0.0.21/24 brd 10.0.0.255 scope global eth0
>>> inet6 fe80::20c:29ff:fe8d:ccf6/64 scope link
>>> valid_lft forever preferred_lft forever
>>> 3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
>>> pfifo_fast state UP qlen 1000
>>> link/ether 00:0c:29:8d:cc:00 brd ff:ff:ff:ff:ff:ff
>>> inet 10.0.1.21/24 brd 10.0.1.255 scope global eth1
>>> inet6 fe80::20c:29ff:fe8d:cc00/64 scope link
>>> valid_lft forever preferred_lft forever
>>> 4: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
>>> pfifo_fast state UP qlen 1000
>>> link/ether 00:0c:29:8d:cc:0a brd ff:ff:ff:ff:ff:ff
>>> inet6 fe80::20c:29ff:fe8d:cc0a/64 scope link
>>> valid_lft forever preferred_lft forever
>>> 5: ovs-system: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN
>>> link/ether 9e:d9:ee:cf:18:ff brd ff:ff:ff:ff:ff:ff
>>> 6: br-ex: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state
>>> UNKNOWN
>>> link/ether 00:0c:29:8d:cc:0a brd ff:ff:ff:ff:ff:ff
>>> inet6 fe80::80c0:34ff:fea7:ab5e/64 scope link
>>> valid_lft forever preferred_lft forever
>>> 10: qr-d0661ff1-a9: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
>>> state UNKNOWN
>>> link/ether 2a:6d:c7:81:de:8e brd ff:ff:ff:ff:ff:ff
>>> inet6 fe80::286d:c7ff:fe81:de8e/64 scope link
>>> valid_lft forever preferred_lft forever
>>> 11: br-int: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state
>>> UNKNOWN
>>> link/ether 6a:aa:36:da:13:45 brd ff:ff:ff:ff:ff:ff
>>> inet6 fe80::c058:39ff:fe4c:20f6/64 scope link
>>> valid_lft forever preferred_lft forever
>>> 13: br-tun: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state
>>> UNKNOWN
>>> link/ether 56:74:ff:da:74:43 brd ff:ff:ff:ff:ff:ff
>>> inet6 fe80::9802:72ff:fed0:f05a/64 scope link
>>> valid_lft forever preferred_lft forever
>>>
>>> [root at network ~]# neutron net-list
>>>
>>> +--------------------------------------+----------+-------------------------------------------------------+
>>> | id | name | subnets
>>> |
>>>
>>> +--------------------------------------+----------+-------------------------------------------------------+
>>> | 2abc487a-09ad-4c5c-bb6b-a98a5a255ad4 | ext-net |
>>> bca9b325-617f-4a0c-878d-44f384056c1c 192.168.50.0/24 |
>>> | 89954a51-5296-4743-97ac-19ddeb7010f4 | demo-net |
>>> 9760500a-1183-4e12-a975-ff6cbdafd27b 192.168.100.0/24 |
>>>
>>> +--------------------------------------+----------+-------------------------------------------------------+
>>>
>>> [root at network ~]# neutron subnet-list
>>>
>>> +--------------------------------------+-------------+------------------+------------------------------------------------------+
>>> | id | name | cidr
>>> | allocation_pools |
>>>
>>> +--------------------------------------+-------------+------------------+------------------------------------------------------+
>>> | 9760500a-1183-4e12-a975-ff6cbdafd27b | demo-subnet |
>>> 192.168.100.0/24 | {"start": "192.168.100.2", "end":
>>> "192.168.100.254"} |
>>> | bca9b325-617f-4a0c-878d-44f384056c1c | ext-subnet |
>>> 192.168.50.0/24 | {"start": "192.168.50.80", "end": "192.168.50.89"}
>>> |
>>>
>>> +--------------------------------------+-------------+------------------+------------------------------------------------------+
>>>
>>> [root at network ~]# neutron router-list
>>>
>>> +--------------------------------------+-------------+-----------------------------------------------------------------------------+
>>> | id | name |
>>> external_gateway_info
>>> |
>>>
>>> +--------------------------------------+-------------+-----------------------------------------------------------------------------+
>>> | 0786427e-d4c0-403a-a2cd-0182bc3bee1c | demo-router |
>>> {"network_id": "2abc487a-09ad-4c5c-bb6b-a98a5a255ad4", "enable_snat":
>>> true} |
>>>
>>> +--------------------------------------+-------------+-----------------------------------------------------------------------------+
>>>
>>> [root at network ~]# ovs-vsctl show
>>> 537302fd-99cc-45ff-b470-2c924daf806e
>>> Bridge br-ex
>>> Port "eth2"
>>> Interface "eth2"
>>> Port "qg-783ec99d-ba"
>>> Interface "qg-783ec99d-ba"
>>> type: internal
>>> Port br-ex
>>> Interface br-ex
>>> type: internal
>>> Bridge br-int
>>> Port "tap7ba88075-80"
>>> tag: 1
>>> Interface "tap7ba88075-80"
>>> type: internal
>>> Port "qr-b13b57db-17"
>>> tag: 1
>>> Interface "qr-b13b57db-17"
>>> type: internal
>>> Port patch-tun
>>> Interface patch-tun
>>> type: patch
>>> options: {peer=patch-int}
>>> Port "qr-d0661ff1-a9"
>>> tag: 4095
>>> Interface "qr-d0661ff1-a9"
>>> type: internal
>>> Port br-int
>>> Interface br-int
>>> type: internal
>>> Bridge br-tun
>>> Port br-tun
>>> Interface br-tun
>>> type: internal
>>> Port "gre-0a00011f"
>>> Interface "gre-0a00011f"
>>> type: gre
>>> options: {in_key=flow, local_ip="10.0.1.21",
>>> out_key=flow, remote_ip="10.0.1.31"}
>>> Port patch-int
>>> Interface patch-int
>>> type: patch
>>> options: {peer=patch-tun}
>>> ovs_version: "1.11.0"
>>>
>>>
>>> Any hints would be much appreciated!
>>>
>>> Cheers,
>>>
>>> David
>>>
>>> _______________________________________________
>>> Mailing list:
>>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>>> Post to : openstack at lists.openstack.org
>>> Unsubscribe :
>>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>>>
>>> !DSPAM:1,53f732d0197288080568482!
>>>
More information about the Openstack
mailing list