Run rulers as a StatefulSet

[disambiguationuk]

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We're using a sidecar to render and load rules for the ruler. On restart though the ruler would lose it's rules cache definitions until the sidecar grabs a new set of rules. Switching the rulers to run as a StatefulSet would mitigate this issue, are there any gotchas that mean we should run it as a Deployment rather than a StatefulSet?

[nschad]

We're using a sidecar to render and load rules for the ruler. On restart though the ruler would lose it's rules cache definitions until the sidecar grabs a new set of rules. Switching the rulers to run as a StatefulSet would mitigate this issue, are there any gotchas that mean we should run it as a Deployment rather than a StatefulSet?

No I don't think so. You would have to switch from the default empityDir volumes too

[disambiguationuk]

Ok we've been doing a bit of work to get this to work with our custom sidecars, it's working but there's some fun with permissions in the default /data/rules path. Will open a PR when it's stable.

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