Add a metric with service level and it's response

[serge1peshcoff]

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We plan to use ciao in our project and its metrics in prometheus, to create alerts. There is a number of unhealthy services in metrics, but it's impossible to understand which service is faulty.

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Add a metric which would return the status code per each service, like this:

ciao_checks_statuses{label="service1"} 200
ciao_checks_statuses{label="service2"} 503

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I don't know about such ones

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As this is my feature request I can implement it myself (I have relevant RoR experience), this issue is mostly for the discussion.

[mclate]

This one is needed for sure. Without this one prometheus metrics are quite useless.

[brotandgames]

@serge1peshcoff Thank you for your proposal. It would be nice if you can find time to implement it.
Should we schedule a small chat (gitter) or audio call (gmail) to design the feature?