Add global limit to the max series per user and metric#1760

Merged

gouthamve merged 13 commits intocortexproject:masterfrom

pracucci:add-global-max-series-per-user-and-metric

Oct 31, 2019

Commits on Oct 31, 2019

Add global limit to the max series per user and metric:
pracucci
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Commented ReadRingMock struct and functions
pracucci
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Vendored new testify dependencies used for mocking
pracucci
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Fixed data race in SeriesLimiter test
pracucci
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Add HealthyIngestersCount() to the ring lifecycler, to avoid having to create a new ring client for the ingesters
pracucci
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Converted string error const into error instance var in limits.go
pracucci
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Added PR number reference to changelog
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Do not update ring lifecycler counters unless the CAS operation succeeded
pracucci
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Fixed nil pointer dereference in the ring lifecycler when updating counters and the ring desc is nil
pracucci
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Reduce to the minimum the block of code wrapped by mutex in the ring's lifecycler updateCounters()
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Added a comment to explain what userStates struct is
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Renamed ring's HealthyIngestersCount() to HealthyInstancesCount() to make it more generic
pracucci
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Fixes after rebasing with master
pracucci
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