Issue #7559 has been updated by Jeff McCune.

Status changed from Needs More Information to Accepted
Assignee deleted (Jeff McCune)

James Turnbull wrote:
> This doesn't resolve the check issue though - having facter_dot_d allows us 
> to specify a fact identifying the type of system but the EC2 fact won't check 
> for this information. Or am I missing something?

No, it doesn't.  It does provide you with the ability to inform Facter that the 
EC2 facts should or should not be evaluated though.  Facter already has the 
ability to restrict facts based on this type of information.  A pull request 
that uses Facter's existing confinement system to restrict the evaluation of 
the facts in question would be a great work-around until we're able to 
introspect the EC2 environment in a supported manner to address the root cause 
of this issue.

-Jeff
----------------------------------------
Feature #7559: Fact for identifying Amazon VPC instances.
https://projects.puppetlabs.com/issues/7559#change-78176

Author: Nigel Kersten
Status: Accepted
Priority: Normal
Assignee: 
Category: library
Target version: 
Keywords: vpc ec2 arp
Branch: 
Affected Facter version: 1.6.10


(From the list)

 I ran into a buglet in facter 1.5.9rc6 (from tmz repo).  In normal AWS
instances it works great.  In VPC instances if doesn't work.  This seems
to be because VPC instances don't use the fe:ff:ff:... MAC addresses.

<pre>
/sbin/ifconfig
eth0      Link encap:Ethernet  HWaddr 02:67:4E:E1:26:30
         inet addr:172.17.129.24  ...


/sbin/arp
Address          HWtype  HWaddress          Flags  Mask  Iface
169.254.169.253  ether   02:67:4E:C0:00:01  C      eth0
172.17.128.1     ether   02:67:4E:C0:00:01  C      eth0


/sbin/ifconfig
eth0      Link encap:Ethernet  HWaddr 02:67:4E:DA:58:16
         inet addr:172.17.128.126

/sbin/arp
Address          HWtype  HWaddress          Flags  Mask  Iface
169.254.169.253  ether   02:67:4E:C0:00:01  C      eth0
172.17.128.1     ether   02:67:4E:C0:00:01  C      eth0
</pre>


Of the two VPC EC2 instances I've seen, the MAC address always start
with 02:67:4E.  I have only seen two instances, both in the same VPC, so
I don't know if this holds for every VPC instance, YMMV.


in ec2.rb , the following seemed to work:
<pre>
def has_euca_mac?
 !!(Facter.value(:macaddress) =~ %r{^02:67:4[eE]:})
end
</pre>


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