[one-users] Problem with network bridge from VMs to physical network.

Diego M. thedragonsreborn at hotmail.com
Fri Aug 8 05:11:03 PDT 2014


Hi Jaime,     Thanks for your reply!
Still not, I'm trying to figure it out right now. The ip route output is the following:root at Host1:~# ip route showdefault via 192.168.7.254 dev eth0192.168.7.0/24 dev eth0  proto kernel  scope link  src 192.168.7.1192.168.7.0/24 dev Vbr0  proto kernel  scope link  src 192.168.7.2192.168.254.0/24 dev Vbr0  proto kernel  scope link  src 192.168.254.254
Term1 routes:C:\Users\User1>route PRINTIPv4 Route Table===========================================================================Active Routes:Network Destination        Netmask          Gateway       Interface            0.0.0.0          0.0.0.0     192.168.7.254   192.168.7.50      10.142.168.0    255.255.255.0         On-link     192.168.7.50===========================================================================
192.168.7.254 routes:admin at Gateway:/tmp/home/root# ip route show130.255.155.1 dev eth0  scope link192.168.7.0/24 dev br0  proto kernel  scope link  src 192.168.7.254130.255.155.0/24 dev eth0  proto kernel  scope link  src 130.255.155.33192.168.254.0/24 via 192.168.7.2 dev br0  metric 1127.0.0.0/8 dev lo  scope linkdefault via 130.255.155.1 dev eth0
I'm thinking that this issue could be caused as I'm routing the traffic to the virtual machines from 192.168.7.254 (The gateway of my network) to Host1 through 192.168.7.2, but actually the traffic comming from Host1 is through 192.168.7.1, maybe that could be causing my problem?
From: jmelis at opennebula.org
Date: Fri, 8 Aug 2014 11:33:01 +0200
Subject: Re: [one-users] Problem with network bridge from VMs to physical network.
To: thedragonsreborn at hotmail.com
CC: users at lists.opennebula.org

Hi,
did you manage to figure this out?
otherwise, can you send us the output of "ip route" in the VM, Host 1 and Term 1?
cheers,


Jaime

On Wed, Jul 30, 2014 at 6:30 PM, Diego M. <thedragonsreborn at hotmail.com> wrote:





Hi all,I'm trying to implement opennebula on my personal lab as we have some projects with a colleague and it is nice to have disposable VMs, and also we are taking the oportunity to learn about OpenNebula to keep up-to-date :)


I would like to ask you a question I have, regarding networking, because I'm pretty sure that I'm missing something on the configurations but I cannot realize what.
We have the following infrastructure:

  
  And the problem is that from the clients on 192.168.7.0/24 subnet I can ping the VMs on 192.168.254.0/24, but the problem is that from the VM I can only ping 192.168.7.1, 192.168.7.2, and 192.168.7.254 of the 192.168.7.0/24 subnet, and all the other clients from some reason are not reacheable. 



I'm for sure missing something somewhere, but I cannot figure what. I had already enabled the ip4 forwarding on Host1 for all interfaces, and the following are the contents of /etc/network/interfaces file:

# The loopback network interfaceauto loiface lo inet loopback
# The primary network interface

allow-hotplug eth0iface eth0 inet static        address 192.168.7.1        netmask 255.255.255.0        gateway 192.168.7.254


auto Vbr0iface Vbr0 inet static        address 192.168.7.2        netmask 255.255.255.0        network 192.168.7.0

        broadcast 192.168.7.255        gateway 192.168.7.254        bridge_ports eth1        bridge_fd 9        bridge_hello 2

        bridge_maxage 12        bridge_maxwait 5        bridge_stp off
auto Vbr0:1iface Vbr0:1 inet static

        address 192.168.254.254        netmask 255.255.255.0        gateway 192.168.7.2

And this is the vnet template I'm using for the VMs:

onevnet show PublicVIRTUAL NETWORK 48 INFORMATION

ID             : 48NAME           : Public

USER           : oneadminGROUP          : usersCLUSTER        : -

TYPE           : RANGEDBRIDGE         : Vbr0

VLAN           : NoUSED LEASES    : 1


PERMISSIONSOWNER          : um-

GROUP          : u--OTHER          : ---


VIRTUAL NETWORK TEMPLATEBRIDGE="Vbr0"

DESCRIPTION=""DNS="192.168.7.254"

GATEWAY="192.168.254.254"NETWORK_ADDRESS="192.168.254.0"

NETWORK_MASK="255.255.255.0"PHYDEV=""

VLAN="NO"VLAN_ID=""


RANGEIP_START       : 192.168.254.1

IP_END         : 192.168.254.253


USED LEASESLEASE=[ MAC="02:00:c0:a8:fe:01", IP="192.168.254.1", IP6_LINK="fe80::400:c0ff:fea8:fe01", USED="1", VID="92" ]


VIRTUAL MACHINES


    ID USER     GROUP    NAME            STAT UCPU    UMEM HOST             TIME

    92 admin    users    Debian 7.5 Base runn    0    256M HOMPLMPKRS   0d 11h23
If someone realize what I'm doing wrong and could give me an advise?

May also, it is not the best way to bridge the connection of the VMs to the physical network, but I did not found other way of doing it on the documentation, or at least I did not understood.


More detailed information about the templates I'm using, below is the "public" network template(provides leases of 192.168.254.0/24), that is the one I want to bridge to the local network (192.168.7.0/24). And after the network template, the information of the VM template, where the NIC using"public" network template is assigned.

oneadmin at HOMPLMPKRSV0001:/root$ onevnet list  ID USER         GROUP        NAME            CLUSTER      TYPE BRIDGE   LEASES  47 oneadmin     users        Private         -               R Vbr0          1

  48 oneadmin     users        Public          -               R Vbr0          1oneadmin at HOMPLMPKRSV0001:/root$ onevnet show 48VIRTUAL NETWORK 48 INFORMATIONID             : 48

NAME           : PublicUSER           : oneadminGROUP          : usersCLUSTER        : -TYPE           : RANGEDBRIDGE         : Vbr0VLAN           : No

USED LEASES    : 1
PERMISSIONSOWNER          : um-GROUP          : u--OTHER          : ---
VIRTUAL NETWORK TEMPLATEBRIDGE="Vbr0"

DESCRIPTION=""DNS="192.168.7.254"GATEWAY="192.168.254.254"NETWORK_ADDRESS="192.168.254.0"NETWORK_MASK="255.255.255.0"

PHYDEV=""VLAN="NO"VLAN_ID=""
RANGEIP_START       : 192.168.254.1IP_END         : 192.168.254.253


USED LEASESLEASE=[ MAC="02:00:c0:a8:fe:01", IP="192.168.254.1", IP6_LINK="fe80::400:c0ff:fea8:fe01", USED="1", VID="92" ]
VIRTUAL MACHINES


    ID USER     GROUP    NAME            STAT UCPU    UMEM HOST             TIME    92 admin    users    Debian 7.5 Base runn    0    256M HOMPLMPKRS   1d 10h57oneadmin at HOMPLMPKRSV0001:/root$ onetemplate list

  ID USER            GROUP           NAME                                REGTIME  17 oneadmin        users           Test                         07/17 10:57:06  18 oneadmin        users           Debian 7.5 Base 256 MB       07/18 12:02:33

oneadmin at HOMPLMPKRSV0001:/root$ onetemplate show 18TEMPLATE 18 INFORMATIONID             : 18NAME           : Debian 7.5 Base 256 MBUSER           : oneadminGROUP          : users

REGISTER TIME  : 07/18 12:02:33
PERMISSIONSOWNER          : um-GROUP          : u--OTHER          : ---
TEMPLATE CONTENTS
CONTEXT=[
  HOSTNAME="$NAME",  NETWORK="YES" ]CPU="0.5"DISK=[  BUS="ide",  IMAGE="Debian 7.5",  IMAGE_UNAME="admin" ]

MEMORY="256"NAME="Debian 7.5 Base 256 MB"NIC=[  NETWORK="Public",  NETWORK_UNAME="oneadmin" ]NIC=[  NETWORK="Private",

  NETWORK_UNAME="oneadmin" ]OS=[  ARCH="x86_64",  BOOT="hd" ]RAW=[  TYPE="kvm" ]TEMPLATE_ID="18"

VCPU="1"
Thanks in advance and best regards!!
 		 	   		  

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-- 
Jaime Melis
Project Engineer
OpenNebula - Flexible Enterprise Cloud Made Simple
www.OpenNebula.org | jmelis at opennebula.org

 		 	   		  
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