[Openstack] Neutron: Internet not available in VM instances

Remo Mattei Remo at italy1.com
Thu Oct 6 10:06:35 UTC 2016


what’s your l3agent.ini says about external? 
> On Oct 6, 2016, at 06:16, kamalakannan sanjeevan <chirukamalakannan at gmail.com> wrote:
> 
> Hello,
> 
> I am not able to connect to internet in teh spawned VM's.
> 
> 
> Ethernet card details:
> Eth1 bridged through OVS(mybridge)              - 172.27.10.76
> Eth3                                                            - 192.168.182.251
> 
> after executing the command
> 
> iptables -t nat -A POSTROUTING -o eth1 -j MASQUERADE 
> 
> iptables -t nat -A POSTROUTING -o mybridge -j MASQUERADE
> 
> - I see teh connectivity to VM's from my host name  ie 172.27.10.76 also affected.
> 
> root at VFSR1:~# ovs-vsctl show
> 37f38767-0a2b-45fd-9507-abef7fd2d5c9
>     Bridge br-int
>         fail_mode: secure
>         Port "qr-2ff64ff8-b8"
>             tag: 6
>             Interface "qr-2ff64ff8-b8"
>                 type: internal
>         Port patch-tun
>             Interface patch-tun
>                 type: patch
>                 options: {peer=patch-int}
>         Port "qvo310233a4-9f"
>             tag: 6
>             Interface "qvo310233a4-9f"
>         Port br-int
>             Interface br-int
>                 type: internal
>         Port "tap6bc359b6-f0"
>             tag: 6
>             Interface "tap6bc359b6-f0"
>                 type: internal
>         Port "qvo703c764e-23"
>             tag: 5
>             Interface "qvo703c764e-23"
>         Port int-mybridge
>             Interface int-mybridge
>                 type: patch
>                 options: {peer=phy-mybridge}
>         Port "qg-333a2d2b-ca"
>             tag: 5
>             Interface "qg-333a2d2b-ca"
>                 type: internal
>     Bridge mybridge
>         Port mybridge
>             Interface mybridge
>                 type: internal
>         Port "eth1"
>             Interface "eth1"
>         Port phy-mybridge
>             Interface phy-mybridge
>                 type: patch
>                 options: {peer=int-mybridge}
>     Bridge br-tun
>         fail_mode: secure
>         Port br-tun
>             Interface br-tun
>                 type: internal
>         Port patch-int
>             Interface patch-int
>                 type: patch
>                 options: {peer=patch-tun}
>     ovs_version: "2.5.0"
> 
> 
> Below is my network and router details
> 
> root at VFSR1:~# neutron net-list
> +--------------------------------------+---------+-----------------------------------------------------+
> | id                                   | name    | subnets                                             |
> +--------------------------------------+---------+-----------------------------------------------------+
> | 51739543-b7d1-414b-bec1-9b38c3e5d5d7 | public  | 0db9fa02-27eb-4f38-8693-200719fc1fbf 172.27.10.0/24 <http://172.27.10.0/24> |
> | bf919707-b1eb-4d8f-90fe-5bcf0e07dce3 | private | 7fddc311-7938-44c4-abd4-e5095adba422 192.168.0.0/24 <http://192.168.0.0/24> |
> +--------------------------------------+---------+-----------------------------------------------------+
> root at VFSR1:~# neutron router-list
> +--------------------------------------+--------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------+-------+
> | id                                   | name   | external_gateway_info                                                                                                                                                                     | distributed | ha    |
> +--------------------------------------+--------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------+-------+
> | 323a6782-46aa-458e-ad76-f9462d8ad955 | router | {"network_id": "51739543-b7d1-414b-bec1-9b38c3e5d5d7", "enable_snat": true, "external_fixed_ips": [{"subnet_id": "0db9fa02-27eb-4f38-8693-200719fc1fbf", "ip_address": "172.27.10.101"}]} | False       | False |
> +--------------------------------------+--------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------+-------+
> 
> Below are my instances created 
> 
> root at VFSR1:~# nova list
> +--------------------------------------+--------+--------+------------+-------------+------------------------------------+
> | ID                                   | Name   | Status | Task State | Power State | Networks                           |
> +--------------------------------------+--------+--------+------------+-------------+------------------------------------+
> | b737645b-317e-46be-b06a-f1b94f378d95 | test   | ACTIVE | -          | Running     | public=172.27.10.100               |
> | 378b3776-dddb-4007-823a-8c4e2781dbdd | ubuntu | ACTIVE | -          | Running     | private=192.168.0.3, 172.27.10.102 |
> +--------------------------------------+--------+--------+------------+-------------+---------------------------------
> 
> I have internet connectivity using the machine IP 172.27.10.76, but the internet is not working in teh VM range 172.27.10.100,172,27.10.250.
> 
> 
> I have attached the firewall log as well.
> 
> Please advise.
> 
> Regards
> kamal
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