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From Darren Shepherd <darren.s.sheph...@gmail.com>
Subject Re: Metadata URL location
Date Thu, 24 Oct 2013 21:51:52 GMT
Alex,

I don't think that's correct.  The instructions that I gave in the
earlier email was changes to the VR to serve metadata from the VR.
Regardless of hypervisor, it should work.

Darren

On Thu, Oct 24, 2013 at 10:54 AM, Alex Huang <Alex.Huang@citrix.com> wrote:
> In order to use an link local address inside the end user vm, that metadata service must
be setup on every hypervisor's dom0 or it has to be proxied out of the dom0.  That's not doable
for VmWare.  Instead, CloudStack uses VR to serve the data, which works for all three hypervisors.
>
> --Alex
>
>> -----Original Message-----
>> From: Darren Shepherd [mailto:darren.s.shepherd@gmail.com]
>> Sent: Thursday, October 24, 2013 8:13 AM
>> To: dev@cloudstack.apache.org
>> Cc: klindgren@godaddy.com
>> Subject: Re: Metadata URL location
>>
>> My guess, I don't really know, would be because its hard.  The VR uses link
>> local for the control network so 169.254/16 is bound to the wrong nic.  To fix
>> this you just need some ip routing magic in linux (credit goes to Kris Lindgren
>> who showed me how to do this).  Add the below to a file, substitute eth0 for
>> the guest network nic, run "ip -b <FILE>"
>> The below effectively creates a routing table dedicated to the IP
>> 169.254.169.254 that sets it default route to go out the guest network nic.
>>
>> rule add from 169.254.169.254 table 70
>> rule add to 169.254.169.254 dev eth0 table 70 route flush table 70 route add
>> default dev eth0 src 169.254.169.254 table 70 route flush cache
>>
>> Darren
>>
>> On Thu, Oct 24, 2013 at 6:10 AM, Shanker Balan
>> <shanker.balan@shapeblue.com> wrote:
>> > Hi Guys,
>> >
>> > CloudStack metadata services are on the default gateway while on EC2,
>> > its at 169.254.169.254. Am curious to know why CloudStack does not use
>> > a link local address for meta data services.
>> >
>> > A search of the Wiki
>> (https://cwiki.apache.org/confluence/dosearchsite.action?where=CLOUDST
>> ACK&tooltip=Type+ALL%3A+in+your+query+to+search+all+of+Confluence&
>> spaceSearch=true&queryString=metadata) didn't seem to list any doc
>> related to the design of this service.
>> >
>> > TIA.
>> >
>> > --
>> > @shankerbalan
>> >
>> > M: +91 98860 60539 | O: +91 (80) 67935867 shanker.balan@shapeblue.com
>> > | www.shapeblue.com | Twitter:@shapeblue ShapeBlue Services India LLP,
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>> >
>> >
>> >
>> >
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