[ovirt-users] hosted engine vm network access

Thu May 7 13:04:53 UTC 2015


On 05/07/2015 09:13 AM, Yedidyah Bar David wrote:
> (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 have no more eth1 because i reinstall everything from the beginning
with no eth1. ust once NIC eth0
>
>> 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).
Right


> Can you ping the address of eth1?

i have no eth1
>
>>
>> i hope i explained my problemin a maner that you could help me.
> Still not enough details.
>
> Where are eth0 and eth1 connected?

i have a GW @192.168.42.254

my centosServer7 @192.168.42.114 (eth0)
my CentosServer7-2 @192.168.42.115 (eth0) for the clustering but no yet
configured.....i will set it up after i have installed the hosted-engine vm
nothing more


>
> Please provide the details I asked for below. Thanks!
>
> Best regards,
>
>>
>> sorry for my english
>>
>>
>> thank you for the help.
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> 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,
>>