ec2/fedora-18-i386-ec2.ks ec2/fedora-18-x86_64-ec2.ks

[Garrett Holmstrom]

On 2012-10-11 13:54, Matthew Miller wrote:
> On Thu, Oct 11, 2012 at 01:48:29PM -0700, Garrett Holmstrom wrote:
>>> why fedora ec2-image doesn't have a swap ?
>> The standard in EC2 is to use ephemeral storage for swap.
>> Unfortunately, different instance types put their ephemeral storage in
>> different places, and some have none at all, so I suggest using a
>> script to manage swap space as the instance starts.  You can do this
>> by uploading a script as the instance's user data:
>> euca-run-instances ami-2ea50247 ... --user-data-file=some-shell-script.sh
>
> Hmmm. Can we include that to make things nicer?

Sure, if someone can figure out how to do that reliably.  We can 
certainly try to guess, but the location of the ephemeral storage is 
going to change based on both the instance type and where the user asks 
EC2 to put it.  t1.micro instances aren't entitled to any ephemeral 
storage at all, and other EBS instances don't get any either unless the 
user explicitly asks EC2 for it.  And that's just Amazon's cloud.

> (I was just noticing that the kickstart puts /dev/xvda3 as swap in fstab on
> i386 only, so we're already halfway trying to do something conditional.)

Using /dev/xvda3 for swap space used to be the standard on 32-bit 
m1.small instances when those instances were backed by instance storage. 
  It probably still is, too, but we don't publish those images any more 
anyway.

I'm not saying that what you're suggesting can't be done; it's just not 
as simple to make it "just work" everywhere as it first appears.  Anyone 
up to the challenge?  ;-)

--
Garrett Holmstrom