Add label to Redis check

[codingjoe]

Hi,
sorry I think I've understood where the misunderstandig is coming from 😅

I know that I can add checks multiple times, but looking at cache/database ones, I've seen an "alias" parameter which I was wrongly thinking that it was for interface distinguishing (so I was asking to have it on Redis as well), instead it's the name of the related cache/database to be checked.

Basically I need to distinguish between the two redis checks because actually they are like this:

And in JSON is even worst because it's collapsed into one:

It may also be redis url or host/port if you can get them from the client_factory, I don't need to customize them, just distinguish.

Originally posted by @gabriele-v in #656 (reply in thread)

[gabriele-v]

Hello,
I've installed new version but unfortunately with my configuration it's still the same because it's point to the same host on different ports:

Is it possible to add port as well?

Thanks!

[codingjoe]

Yes, @gabriele-v do you want to contribute a patch yourselves? You have been so helpful in improving the latest release; I believe you deserve a little credit. 🏅

It's fairly simple; you just need to add "port" here:

django-health-check/health_check/contrib/redis.py

Line 70 in 07c5eaa

if key in {"host", "db"}