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This release contains 230 contributions from 29 contributors. We also have 9 new contributors. Thank you all for the contributions!

Some notable changes release are: - Experimental native histogram ingestion via -blocks-storage.tsdb.enable-native-histograms flag - Support for filtering alerts on ListRules API - Add query rejection mechanism to protect queries - Introduce token bucket limiter to protect store gateway - Implement ingester metadata API limits - Remove -querier.query-store-for-labels-enabled flag - Remove -querier.at-modifier-enabled flag - Remove oltp_endpoint config - ruler.evaluation-delay-duration mark as deprecated. Use ruler.query-offset - -querier.max-outstanding-requests-per-tenant and -query-scheduler.max-outstanding-requests-per-tenant mark as deprecated. Use frontend.max-outstanding-requests-per-tenant

What's Changed

  • [CHANGE] Ingester: Remove -querier.query-store-for-labels-enabled flag. Querying long-term store for labels is always enabled. [#5984]
  • [CHANGE] Server: Instrument cortex_request_duration_seconds metric with native histogram. If native-histograms feature is enabled in monitoring Prometheus then the metric name needs to be updated in your dashboards. [#6056]
  • [CHANGE] Distributor/Ingester: Change cortex_distributor_ingester_appends_total, cortex_distributor_ingester_append_failures_total, cortex_distributor_ingester_queries_total, and cortex_distributor_ingester_query_failures_total metrics to use the ingester ID instead of its IP as the label value. [#6078]
  • [CHANGE] OTLP: Set AddMetricSuffixes to true to always enable metric name normalization. [#6136]
  • [CHANGE] Querier: Deprecate and enable by default querier.ingester-metadata-streaming flag. [#6147]
  • [CHANGE] QueryFrontend/QueryScheduler: Deprecate -querier.max-outstanding-requests-per-tenant and -query-scheduler.max-outstanding-requests-per-tenant flags. Use frontend.max-outstanding-requests-per-tenant instead. [#6146]
  • [CHANGE] Ingesters: Enable 'snappy-block' compression on ingester clients by default. [#6148]
  • [CHANGE] Ruler: Scheduling ruler.evaluation-delay-duration to be deprecated. Ruler will use the highest value between ruler.evaluation-delay-duration and ruler.query-offset [#6149]
  • [CHANGE] Querier: Remove -querier.at-modifier-enabled flag. [#6157]
  • [CHANGE] Tracing: Remove deprecated oltp_endpoint config entirely. [#6158]
  • [CHANGE] Store Gateway: Enable store gateway zone stable shuffle sharding by default. [#6161]
  • [FEATURE] Ingester/Distributor: Experimental: Enable native histogram ingestion via -blocks-storage.tsdb.enable-native-histograms flag. [#5986] [#6010] [#6020]
  • [FEATURE] Querier: Enable querying native histogram chunks. [#5944] [#6031]
  • [FEATURE] Query Frontend: Support native histogram in query frontend response. [#5996] [#6043]
  • [FEATURE] Ruler: Support sending native histogram samples to Ingester. [#6029]
  • [FEATURE] Ruler: Add support for filtering out alerts in ListRules API. [#6011]
  • [FEATURE] Query Frontend: Added a query rejection mechanism to block resource-intensive queries. [#6005]
  • [FEATURE] OTLP: Support ingesting OTLP exponential metrics as native histograms. [#6071] [#6135]
  • [FEATURE] Ingester: Add ingester.instance-limits.max-inflight-query-requests to allow limiting ingester concurrent queries. [#6081]
  • [FEATURE] Distributor: Add validation.max-native-histogram-buckets to limit max number of bucket count. Distributor will try to automatically reduce histogram resolution until it is within the bucket limit or resolution cannot be reduced anymore. [#6104]
  • [FEATURE] Store Gateway: Introduce token bucket limiter to enhance store gateway throttling. [#6016]
  • [FEATURE] Ruler: Add support for query_offset field on RuleGroup and new ruler_query_offset per-tenant limit. [#6085]
  • [ENHANCEMENT] Ruler: Add support to persist tokens in rulers. [#5987]
  • [ENHANCEMENT] Query Frontend/Querier: Added store gateway postings touched count and touched size in Querier stats and log in Query Frontend. [#5892]
  • [ENHANCEMENT] Query Frontend/Querier: Returns warnings on prometheus query responses. [#5916]
  • [ENHANCEMENT] Ingester: Allowing to configure -blocks-storage.tsdb.head-compaction-interval flag up to 30 min and add a jitter on the first head compaction. [#5919] [#5928]
  • [ENHANCEMENT] Distributor: Added max_inflight_push_requests config to ingester client to protect distributor from OOMKilled. [#5917]
  • [ENHANCEMENT] Distributor/Querier: Clean stale per-ingester metrics after ingester restarts. [#5930]
  • [ENHANCEMENT] Distributor/Ring: Allow disabling detailed ring metrics by ring member. [#5931]
  • [ENHANCEMENT] KV: Etcd Added etcd.ping-without-stream-allowed parameter to disable/enable PermitWithoutStream [#5933]
  • [ENHANCEMENT] Ingester: Add a new limits_per_label_set limit. This limit functions similarly to max_series_per_metric, but allowing users to define the maximum number of series per LabelSet. [#5950] [#5993]
  • [ENHANCEMENT] Store Gateway: Log gRPC requests together with headers configured in http_request_headers_to_log. [#5958]
  • [ENHANCEMENT] Ingester: Add a new experimental -ingester.labels-string-interning-enabled flag to enable string interning for metrics labels. [#6057]
  • [ENHANCEMENT] Ingester: Add link to renew 10% of the ingesters tokens in the admin page. [#6063]
  • [ENHANCEMENT] Ruler: Add support for filtering by state and health field on Rules API. [#6040]
  • [ENHANCEMENT] Ruler: Add support for filtering by match field on Rules API. [#6083]
  • [ENHANCEMENT] Distributor: Reduce memory usage when error volume is high. [#6095]
  • [ENHANCEMENT] Compactor: Centralize metrics used by compactor and add user label to compactor metrics. [#6096]
  • [ENHANCEMENT] Compactor: Add unique execution ID for each compaction cycle in log for easy debugging. [#6097]
  • [ENHANCEMENT] Compactor: Differentiate retry and halt error and retry failed compaction only on retriable error. [#6111]
  • [ENHANCEMENT] Ruler: Add support for filtering by state and health field on Rules API. [#6040]
  • [ENHANCEMENT] Compactor: Split cleaner cycle for active and deleted tenants. [#6112]
  • [ENHANCEMENT] Compactor: Introduce cleaner visit marker. [#6113]
  • [ENHANCEMENT] Query Frontend: Add cortex_query_samples_total metric. [#6142]
  • [ENHANCEMENT] Ingester: Implement metadata API limit. [#6128]
  • [BUGFIX] Configsdb: Fix endline issue in db password. [#5920]
  • [BUGFIX] Ingester: Fix user and type labels for the cortex_ingester_tsdb_head_samples_appended_total TSDB metric. [#5952]
  • [BUGFIX] Querier: Enforce max query length check for /api/v1/series API even though ignoreMaxQueryLength is set to true. [#6018]
  • [BUGFIX] Ingester: Fix issue with the minimize token generator where it was not taking in consideration the current ownership of an instance when generating extra tokens. [#6062]
  • [BUGFIX] Scheduler: Fix user queue in scheduler that was not thread-safe. [#6077] [#6160]
  • [BUGFIX] Ingester: Include out-of-order head compaction when compacting TSDB head. [#6108]
  • [BUGFIX] Ingester: Fix cortex_ingester_tsdb_mmap_chunks_total metric. [#6134]
  • [BUGFIX] Query Frontend: Fix query rejection bug for metadata queries. [#6143]

New Contributors

Full Changelog: https://github.com/cortexproject/cortex/compare/v1.17.1...v1.18.0

Source: README.md, updated 2024-09-03