[ovirt-users] hosted engine vm network access

Thu May 7 07:13:27 UTC 2015

(Ccing users list)

----- Original Message -----
> From: "mike" <mike at inguera.com>
> To: "Yedidyah Bar David" <didi at redhat.com>
> Sent: Thursday, May 7, 2015 4:16:54 AM
> Subject: Re: hosted engine vm network access
> 
> Hello
> 
> 
> Thank you for your answers.
> 
> i tried everything from the beginning with the same probleme, i can ping
> my Centos7 Server but i cannot not have internet access neither to my GW
> on the created vm by hosted-engine --deploy. i can ONLY ping my centos 7
> server
> 
> 
> I have one Centos7 server installed and updated
> 
> 1 NIC eth0 at 192.168.42.114/24

But you wrote below that you have also eth1 ?

> 
> i installed the ovirt repo
> 
> i run hosted-engine, follow the questions, i set bridge at eth0 and set
> the FQDN of the vm at hevm.lab.lan (which is present in the /etc/hosts
> file of my Centos7 server with ip 192.168.42.116)
> 
> i can see on my Centos7 Server that i have a new interface named
> ovirtmgmgt with the the ip previously set for eth0 and now eth0 has no
> ip address but i can still ssh to my centos7 serverthrough ovirtmgmt
> interface i presume...

Indeed - this is a normal linux bridge

> 
> 
> here is my bridge conf of my centos7 server
> 
> #brctl show
> bridge name     bridge id               STP enabled     interfaces
> ;vdsmdummy;             8000.000000000000       no
> ovirtmgmt               8000.000c29de8495       no              eth0
> 
> 
> 
> Once my VM is created (hevm.lab.lan), i connect to it again through vnc
> and  i set an ip address manualy like:
> # ifconfig eth0 192.168.42.116/24
> # route add default gw 192.168.42.254
> 
> 
> to resume, i can only ping my centos7 server and no other host on the
> same subnet and no internet access.

I assume you can only ping the address of the ovirtmgmt bridge (192.168.42.114).
Can you ping the address of eth1?

> 
> 
> i hope i explained my problemin a maner that you could help me.

Still not enough details.

Where are eth0 and eth1 connected?

Please provide the details I asked for below. Thanks!

Best regards,

> 
> 
> sorry for my english
> 
> 
> thank you for the help.
> 
> 
> 
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> 
> 
> On 05/06/2015 07:37 AM, Yedidyah Bar David wrote:
> > ----- Original Message -----
> >> From: "mike" <mike at inguera.com>
> >> To: sbonazzo at redhat.com
> >> Cc: didi at redhat.com
> >> Sent: Tuesday, May 5, 2015 7:29:48 PM
> >> Subject: hosted engine vm network access
> >>
> >> Hie.
> >>
> >> i've been asked to email you instead of asking on the #ovirt channel.
> > That's fine, but usually in such cases people are supposed/advised to
> > email users at ovirt.org, Ccing specific people if needed/relevant :-)
> >
> >>
> >> i have followed this instructions:
> >> http://community.redhat.com/blog/2014/10/up-and-running-with-ovirt-3-5/
> >>
> >> the only differences are the IP addresse/mapping names of the begining
> >>
> >> _once i have installed the hosted engine through hosted-engine --deploy,
> >> i connect to it using vnc but i cannot have internet access to install
> >> the engine from ovirt repo neither ping my Main host_
> >>
> >> i have:
> >>
> >> 192.168.42.116    virt1    virt1.lab.lan    nfsmount    nfsmount.lab.lan
> >> 192.168.42.117    hevm    hevm.lab.lan    # this is the ip i would like
> >> to set for the hosted engine VM
> > You mean, you have this in /etc/hosts of all relevant machines?
> >
> >>
> >> on my Main Host cento7, i have
> >>
> >> eth1-> 192.168.42.116 (managment NIC for ssh access and nfs server)
> >> eth0-> with nothing
> >> ovirtmgmt-> 192.168.42.114
> > Which includes eth0? What's the output of 'brctl show'?
> >
> > Are eth0 and eth1 on the same switch/segment?
> >
> > What's the subnet of each?
> >
> >> bond0-> with nothing
> > That's normal
> >
> >>
> >> can you please help me?
> > What do you have on the engine VM?
> >
> > Can you ssh to the engine from the host? Or the other direction?
> >
> > Please check both addresses of the host.
> >
> > I am not sure, but for the engine VM to access 192.168.42.116, you might
> > need to add some routing somewhere.
> >
> > I'd say this isn't related to hosted-engine, but some general networking
> > issue. If you fail to diagnose this at this point, you can try to simply
> > boot some live cd in a VM (e.g. using virt-install or even qemu directly)
> > and debug from there. Once you have it working, start hosted-engine again.
> >
> > Please check (or post, if you want us to help) all relevant information,
> > including the above, and also things such as:
> >
> > Routing table of host/vm, and of all relevant routers
> >
> > Do you use dhcp? Does it work? On host/engine?
> >
> > Did you enable ip forwarding on the host (cat
> > /proc/sys/net/ipv4/ip_forward)?
> >
> > After you try ssh/ping, arp table on host/engine (arp -an)
> >
> > Check iptables config/logs
> >
> > Etc.
> >
> > Good luck.
> >
> > If you fail to solve this yourself, please Cc users@ with your reply.
> >
> > Thanks!
> >
> > Best,
> 
> 

-- 
Didi