Commits on Jan 29, 2020

1. Monitoring Dashboards: Use /query_range to fetch label values …

   Use `/query_range` instead of `/query` to fetch the available label
   values so that all values during the time range are returned, not just
   the values available right now.
   
   Using `/query_range` is not perfect because it is not 100% guaranteed to
   return all values. Specifically, short lived series could be missed by
   `/query_range`'s data sampling. Although this should be very unlikely in
   practice.
   
   Using `/series` would be guaranteed to return all series, but it is not
   yet available through our API proxy. Using `/series` should also be more
   efficient.
   
   We also can't use `/label/<LABEL>/values` because it doesn't take a
   label selector.

   

   kyoto committed Jan 29, 2020
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