[Bug 1374166] Re: Document how to add swap space on Azure resource disk

[Daniel Watkins]

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Hi trialotto,

On 20/01/15 02:15, trialotto wrote:
> The documentation looks great.
Thanks!

> However, can you add the following (important) remarks to the 
> documentation page:
> 
> a) as from cloud-init 0.7.6, the option exists to create swap by
> means of the swap stanza

Thanks for the pointer.  The swap directive will only create swap
_files_, rather than swap partitions.  I've added a note to the page
and a link to the cloud-init example of how to use the swap directive.

> b) in good practice, swap partitions should be at the start of the
> disk (and a function of the size of memory available)

Best practices for swap partitions are outside of the scope of this
documentation (particularly given that when we're talking about
storage in a cloud, it's very difficult to know what it's actually
backing on to).

> - the new swap stanza (in newer versions of cloud-init) are 
> automatically determined with some code logic, this should also be 
> applied to swap partitions (and that is possible, since the
> settings are only applied on provisiniong or a restart of the VM),

Feel free to open a new bug for this, explaining precisely the change
in behaviour you would want to see. :)

> -  in general, cloud-init should be able to detect existing swap
> files and/or swap partitions and leaving them as is, when
> restarting a VM (instead of creating them again, as happens at this
> moment, with swap files and swap partitions). In essence, a restart
> (a shut-down and start-up sequence) should not be required to
> CHANGE swap space.

I'm not 100% sure what behaviour you are seeing that you don't expect
to.  Could you file a new bug with details?


Thanks,

Dan
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Title:
  Document how to add swap space on Azure resource disk

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