grafana: Ensure Dashboard Vars Depending on LabelNames; LabelValues; Series are limited to certain time period / Add ability to set default in querier

[bwplotka]

Currently unlimited time range for Label and LabelValues and Series Thanos APIs return and touch all the data as .. expected. This is great, but it does not make much sense for most of the cases.

We recently added time range parameters to those API endpoints for both Thanos & Prometheus: #1811 However we need to make sure that Grafana utilizes those. Otherwise Grafana always load years worth of series and labels every time params are refreshed.

Let's:

1. Add issue on Grafana side
2. Allow setting a sane default if time params are not specified. This is what Cortex team is doing - they allow fetching last 2h for non specified time ranges.

We also expect those endpoints to be cached in next iterations of Query Frontend (cc @kakkoyun ) but still this issue is valid.

Help wanted (:

[kakkoyun]

xref: grafana/grafana#11184

[kakkoyun]

Add issue on Grafana side

xref: grafana/grafana#27537 and PR (WIP): grafana/grafana#27548

[kakkoyun]

Allow setting a sane default if time params are not specified. This is what Cortex team is doing - they allow fetching last 2h for non specified time ranges.

#3147

[stale]

Hello 👋 Looks like there was no activity on this issue for the last two months.
Do you mind updating us on the status? Is this still reproducible or needed? If yes, just comment on this PR or push a commit. Thanks! 🤗
If there will be no activity in the next two weeks, this issue will be closed (we can always reopen an issue if we need!). Alternatively, use remind command if you wish to be reminded at some point in future.

[kakkoyun]

I'll handle what's left for this issue soon.

[stale]

Hello 👋 Looks like there was no activity on this issue for the last two months.
Do you mind updating us on the status? Is this still reproducible or needed? If yes, just comment on this PR or push a commit. Thanks! 🤗
If there will be no activity in the next two weeks, this issue will be closed (we can always reopen an issue if we need!). Alternatively, use remind command if you wish to be reminded at some point in future.

[kakkoyun]

/remind me to finish this in a week

[stale]

Hello 👋 Looks like there was no activity on this issue for the last two months.
Do you mind updating us on the status? Is this still reproducible or needed? If yes, just comment on this PR or push a commit. Thanks! 🤗
If there will be no activity in the next two weeks, this issue will be closed (we can always reopen an issue if we need!). Alternatively, use remind command if you wish to be reminded at some point in future.

[yeya24]

@kakkoyun Was this issue solved already by #3147?

[kakkoyun]

@yeya24 Only a minor part is left, we need to adjust the default values for the interval. I want to do it for 0.20.

/remind me to finish this next Monday

[stale]

Hello 👋 Looks like there was no activity on this issue for the last two months.
Do you mind updating us on the status? Is this still reproducible or needed? If yes, just comment on this PR or push a commit. Thanks! 🤗
If there will be no activity in the next two weeks, this issue will be closed (we can always reopen an issue if we need!). Alternatively, use remind command if you wish to be reminded at some point in future.

[stale]

Hello 👋 Looks like there was no activity on this issue for the last two months.
Do you mind updating us on the status? Is this still reproducible or needed? If yes, just comment on this PR or push a commit. Thanks! 🤗
If there will be no activity in the next two weeks, this issue will be closed (we can always reopen an issue if we need!). Alternatively, use remind command if you wish to be reminded at some point in future.

[stale]

Closing for now as promised, let us know if you need this to be reopened! 🤗