Adds 'redis.expires.percent' to redis checks

[pallan]

Allows tracking the percentage difference between keys and expired keys so that you can create alerts on that value in Datadog.

This is a direct copy from the work done by @wisq in our internal cookbooks, https://github.com/Shopify/cookbooks/pull/2871

For review, @wisq @skingry

If it looks okay we can open a PR with DD.

[skingry]

Looks good. When you open a PR with DataDog, make sure to note that the reason for this check is lack of acceptable math functions on existing metrics within their web application. They might end up approving the PR (signaling that they do not intend to add the math functions) or deny the PR (which signals the opposite). Either way, we win.

[wisq]

LGTM. You gonna handle the datadog PR, or should I?

[pallan]

Go ahead, it is your work after all :-)

Peer Allan
Operations Engineer - Shopify

On Jul 3, 2014, at 12:41 PM, Adrian Irving-Beer notifications@github.com wrote:

LGTM. You gonna handle the opscode PR, or should I?

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[wisq]

Rebased on latest DD master.

[pallan]

Re: DataDog#1015

[pallan]

This was merged into datadog master, shall we merge this in or just wait and pull from upstream when released?

[skingry]

I'd pull from upstream.

[pallan]

Will pull from upstream.