Comments inline.

On 20-Jun-2014, at 7:25 pm, Saurav Lahiri <[email protected]> wrote:

> Hello Shanker,
> Appreciate ur inputs. Also I would like to know whats the best practice in
> pre-populating the interfaces file given that it is not known how many
> additional nics users might want to create on their vms. If we pre-populate
> eth0 to eth4 with dhcp method in the template will that break anything?

Running DHCP on multiple interfaces can cause the default gateway
to switch. This has caused me a lot of PITA on AWS EC2 instances.

I now statically assign the IP Addressed on the non primary interfaces. As far
as template creation goes, I only check for eth0. Its upto the end user
to decide how he wants to get his additional interfaces up.

If you can, check a AWS CentOS/Ubuntu template on how they handle it.





>
> Thanks
> Saurav
>
>
> On Fri, Jun 20, 2014 at 9:33 AM, Shanker Balan <[email protected]>
> wrote:
>
>> Comments inline.
>>
>> On 19-Jun-2014, at 7:55 pm, Saurav Lahiri <[email protected]>
>> wrote:
>>
>>> Hello,
>>> We are running an ubuntu 13.10 vm. In addition to the default network,
>>> another nic has been added to the vm.  Now when the vm boots up, the new
>>> interface eth1 is seen inside the guest but does not have an ip address.
>>> Executing a "dhclient eth1" does get the correct IP.
>>>
>>> A look at  the "/etc/network/interaces" file  shows an entry
>> corresponding
>>> to the eth0.  There is no entry for eth1. On adding an entry for eth1,
>> the
>>> problems appears to get fixed.
>>>
>>> Is this manual step to add the additional nics in the interfaces file
>>> missing in the documentation or is this a bug ?
>>>
>>> =======
>>> auto eth0
>>> iface eth0 inet dhcp
>>> ==========
>>
>>
>> This is change that needs to be done by the creator of the template.
>> CloudStack
>> does not make any changes internal to the template as it does not (should
>> not)
>> have access to it.
>>
>>
>> --
>> @shankerbalan
>>
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--
@shankerbalan

M: +91 98860 60539 | O: +91 (80) 67935867
[email protected] | www.shapeblue.com | Twitter:@shapeblue
ShapeBlue Services India LLP, 22nd floor, Unit 2201A, World Trade Centre, 
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Find out more about ShapeBlue and our range of CloudStack related services

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