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2.13 release: tidy up & cut changelog (#8459)
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This cuts the changelog as of r295

Signed-off-by: Dimitar Dimitrov <[email protected]>
(cherry picked from commit 05c711d)
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dimitarvdimitrov committed Jun 21, 2024
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### Grafana Mimir

* [CHANGE] Store-gateway / querier: enable streaming chunks from store-gateways to queriers by default. #6646
* [CHANGE] Querier: honor the start/end time range specified in the read hints when executing a remote read request. #8431
* [FEATURE] Querier: add experimental streaming PromQL engine, enabled with `-querier.query-engine=mimir`. #8422 #8430 #8454 #8455
* [ENHANCEMENT] Compactor: Add `cortex_compactor_compaction_job_duration_seconds` and `cortex_compactor_compaction_job_blocks` histogram metrics to track duration of individual compaction jobs and number of blocks per job. #8371
* [ENHANCEMENT] Rules: Added per namespace max rules per rule group limit. The maximum number of rules per rule groups for all namespaces continues to be configured by `-ruler.max-rules-per-rule-group`, but now, this can be superseded by the new `-ruler.max-rules-per-rule-group-by-namespace` option on a per namespace basis. This new limit can be overridden using the overrides mechanism to be applied per-tenant. #8378
* [ENHANCEMENT] Rules: Added per namespace max rule groups per tenant limit. The maximum number of rule groups per rule tenant for all namespaces continues to be configured by `-ruler.max-rule-groups-per-tenant`, but now, this can be superseded by the new `-ruler.max-rule-groups-per-tenant-by-namespace` option on a per namespace basis. This new limit can be overridden using the overrides mechanism to be applied per-tenant. #8425
* [ENHANCEMENT] Query-frontend: be able to block remote read queries via the per tenant runtime override `blocked_queries`. #8372 #8415
* [ENHANCEMENT] Query-frontend: added `remote_read` to `op` supported label values for the `cortex_query_frontend_queries_total` metric. #8412
* [ENHANCEMENT] Query-frontend: log the overall length and start, end time offset from current time for remote read requests. The start and end times are calculated as the miminum and maximum times of the individual queries in the remote read request. #8404
* [BUGFIX] Query-frontend: fix `-querier.max-query-lookback` enforcement when `-compactor.blocks-retention-period` is not set, and viceversa. #8388
* [BUGFIX] Ingester: fix sporadic `not found` error causing an internal server error if label names are queried with matchers during head compaction. #8391
* [BUGFIX] Ingester, store-gateway: fix case insensitive regular expressions not matching correctly some Unicode characters. #8391
* [BUGFIX] Query-frontend: "query stats" log now includes the actual `status_code` when the request fails due to an error occurring in the query-frontend itself. #8407
* [BUGFIX] Store-gateway: fixed a case where, on a quick subsequent restart, the previous lazy-loaded index header snapshot was overwritten by a partially loaded one. #8281
* [BUGFIX] Ingester: fixed timestamp reported in the "the sample has been rejected because its timestamp is too old" error when the write request contains only histograms. #8462

### Mixin

### Jsonnet

* [FEATURE] Add support for automatically deleting compactor, store-gateway and read-write mode backend PVCs when the corresponding StatefulSet is scaled down. #8382

### Mimirtool

### Mimir Continuous Test

### Query-tee

* [ENHANCEMENT] Emit trace spans from query-tee. #8419
* [ENHANCEMENT] Log trace ID (if present) with all log messages written while processing a request. #8419
* [ENHANCEMENT] Log user agent when processing a request. #8419
* [ENHANCEMENT] Add `time` parameter to proxied instant queries if it is not included in the incoming request. This is optional but enabled by default, and can be disabled with `-proxy.add-missing-time-parameter-to-instant-queries=false`. #8419
* [BUGFIX] Ensure any errors encountered while forwarding a request to a backend (eg. DNS resolution failures) are logged. #8419

### Documentation

* [ENHANCEMENT] Specify in which component the configuration flags `-compactor.blocks-retention-period`, `-querier.max-query-lookback`, `-query-frontend.max-total-query-length`, `-query-frontend.max-query-expression-size-bytes` are applied and that they are applied to remote read as well. #8433

### Tools

* [ENHANCEMENT] `tsdb-series`: added `-stats` option to print min/max time of chunks, total number of samples and DPM for each series. #8420

## v2.13.0-rc.0

### Grafana Mimir

* [CHANGE] Build: `grafana/mimir` docker image is now based on `gcr.io/distroless/static-debian12` image. Alpine-based docker image is still available as `grafana/mimir-alpine`, until Mimir 2.15. #8204 #8235
* [CHANGE] Ingester: `/ingester/flush` endpoint is now only allowed to execute only while the ingester is in `Running` state. The 503 status code is returned if the endpoint is called while the ingester is not in `Running` state. #7486
* [CHANGE] Distributor: Include label name in `err-mimir-label-value-too-long` error message: #7740
* [CHANGE] Ingester: enabled 1 out 10 errors log sampling by default. All the discarded samples will still be tracked by the `cortex_discarded_samples_total` metric. The feature can be configured via `-ingester.error-sample-rate` (0 to log all errors). #7807
* [CHANGE] Query-frontend: Query results caching and experimental query blocking now utilize the PromQL string-formatted query format rather than the unvalidated query as submitted to the frontend. #7742
* Query results caching should be more stable as all equivalent queries receive the same cache key, but there may be cache churn on first deploy with the updated format
* Query blocking can no longer be circumvented with an equivalent query in a different format; see [Configure queries to block](https://grafana.com/docs/mimir/latest/configure/configure-blocked-queries/)
* [CHANGE] Query-frontend: stop using `-validation.create-grace-period` to clamp how far into the future a query can span.
* [CHANGE] Query-frontend: stop using `-validation.create-grace-period` to clamp how far into the future a query can span. #8075
* [CHANGE] Clamp [`GOMAXPROCS`](https://pkg.go.dev/runtime#GOMAXPROCS) to [`runtime.NumCPU`](https://pkg.go.dev/runtime#NumCPU). #8201
* [CHANGE] Anonymous usage statistics tracking: add CPU usage percentage tracking. #8282
* [CHANGE] Added new metric `cortex_compactor_disk_out_of_space_errors_total` which counts how many times a compaction failed due to the compactor being out of disk. #8237
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* [FEATURE] Querier: add experimental streaming PromQL engine, enabled with `-querier.promql-engine=mimir`. #7693 #7898 #7899 #8023 #8058 #8096 #8121 #8197 #8230 #8247 #8270 #8276 #8277 #8291 #8303 #8340 #8256 #8348
* [FEATURE] New `/ingester/unregister-on-shutdown` HTTP endpoint allows dynamic access to ingesters' `-ingester.ring.unregister-on-shutdown` configuration. #7739
* [FEATURE] Server: added experimental [PROXY protocol support](https://www.haproxy.org/download/2.3/doc/proxy-protocol.txt). The PROXY protocol support can be enabled via `-server.proxy-protocol-enabled=true`. When enabled, the support is added both to HTTP and gRPC listening ports. #7698
* [FEATURE] mimirtool: Add `runtime-config verify` sub-command, for verifying Mimir runtime config files. #8123
* [FEATURE] Query-frontend, querier: new experimental `/cardinality/active_native_histogram_metrics` API to get active native histogram metric names with statistics about active native histogram buckets. #7982 #7986 #8008
* [FEATURE] Alertmanager: Added `-alertmanager.max-silences-count` and `-alertmanager.max-silence-size-bytes` to set limits on per tenant silences. Disabled by default. #6898
* [FEATURE] Alertmanager: Added `-alertmanager.max-silences-count` and `-alertmanager.max-silence-size-bytes` to set limits on per tenant silences. Disabled by default. #8241 #8249
* [FEATURE] Ingester: add experimental support for the server-side circuit breakers when writing to and reading from ingesters. This can be enabled using `-ingester.push-circuit-breaker.enabled` and `-ingester.read-circuit-breaker.enabled` options. Further `-ingester.push-circuit-breaker.*` and `-ingester.read-circuit-breaker.*` options for configuring circuit-breaker are available. Added metrics `cortex_ingester_circuit_breaker_results_total`, `cortex_ingester_circuit_breaker_transitions_total`, `cortex_ingester_circuit_breaker_current_state` and `cortex_ingester_circuit_breaker_request_timeouts_total`. #8180 #8285 #8315 #8446
* [FEATURE] Distributor, ingester: add new setting `-validation.past-grace-period` to limit how old (based on the wall clock minus OOO window) the ingested samples can be. The default 0 value disables this limit. #8262
* [ENHANCEMENT] Distributor: add metrics `cortex_distributor_samples_per_request` and `cortex_distributor_exemplars_per_request` to track samples/exemplars per request. #8265
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* [ENHANCEMENT] Query-frontend: use zero-allocation experimental decoder for active series queries via `-query-frontend.use-active-series-decoder`. #7665
* [ENHANCEMENT] Go: updated to 1.22.2. #7802
* [ENHANCEMENT] Query-frontend: support `limit` parameter on `/prometheus/api/v1/label/{name}/values` and `/prometheus/api/v1/labels` endpoints. #7722
* [ENHANCEMENT] Expose TLS configuration for the S3 backend client. #2652
* [ENHANCEMENT] Expose TLS configuration for the S3 backend client. #7959
* [ENHANCEMENT] Rules: Support expansion of native histogram values when using rule templates #7974
* [ENHANCEMENT] Rules: Add metric `cortex_prometheus_rule_group_last_restore_duration_seconds` which measures how long it takes to restore rule groups using the `ALERTS_FOR_STATE` series #7974
* [ENHANCEMENT] OTLP: Improve remote write format translation performance by using label set hashes for metric identifiers instead of string based ones. #8012
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* [FEATURE] Add support to deploy Mimir with experimental ingest storage enabled. #8028 #8222
* [ENHANCEMENT] Compactor: add `$._config.cortex_compactor_concurrent_rollout_enabled` option (disabled by default) that makes use of rollout-operator to speed up the rollout of compactors. #7783 #7878
* [ENHANCEMENT] Shuffle-sharding: add `$._config.shuffle_sharding.ingest_storage_partitions_enabled` and `$._config.shuffle_sharding.ingester_partitions_shard_size` options, that allow configuring partitions shard size in ingest-storage mode. #7804
* [ENHANCEMENT] Update rollout-operator to `v0.17.0`. #8399
* [ENHANCEMENT] Add `_config.autoscaling_querier_predictive_scaling_enabled` to scale querier based on inflight queries 7 days ago. #7775
* [ENHANCEMENT] Add support to autoscale ruler-querier replicas based on in-flight queries too (in addition to CPU and memory based scaling). #8060 #8188
* [ENHANCEMENT] Distributor: improved distributor HPA scaling metric to only take in account ready pods. This requires the metric `kube_pod_status_ready` to be available in the data source used by KEDA to query scaling metrics (configured via `_config.autoscaling_prometheus_url`). #8250
* [ENHANCEMENT] Update rollout-operator to `v0.17.0`. #8399
* [ENHANCEMENT] Distributor: improved distributor HPA scaling metric to only take in account ready pods. This requires the metric `kube_pod_status_ready` to be available in the data source used by KEDA to query scaling metrics (configured via `_config.autoscaling_prometheus_url`). #8251
* [BUGFIX] Guard against missing samples in KEDA queries. #7691

### Mimirtool

* [CHANGE] Deprecated `--rule-files` flag in favor of CLI arguments. #7756
* [BUGFIX] Fix panic in `loadgen` subcommand. #7629
* [ENHANCEMENT] Add `mimir-http-prefix` configuration to set the Mimir URL prefix when using legacy routes. #8069
* [FEATURE] mimirtool: Add `runtime-config verify` sub-command, for verifying Mimir runtime config files. #8123
* [ENHANCEMENT] `mimirtool promql format`: Format PromQL query with Prometheus' string or pretty-print formatter. #7742
* [ENHANCEMENT] Add option `--output-dir` to `mimirtool rules get` and `mimirtool rules print` to allow persisting rule groups to a file for edit and re-upload. #7247
* [ENHANCEMENT] Add `mimir-http-prefix` configuration to set the Mimir URL prefix when using legacy routes. #8069
* [ENHANCEMENT] Add option `--output-dir` to `mimirtool rules get` and `mimirtool rules print` to allow persisting rule groups to a file for edit and re-upload. #8142
* [BUGFIX] Fix panic in `loadgen` subcommand. #7629
* [BUGFIX] `mimirtool rules prepare`: do not add aggregation label to `on()` clause if already present in `group_left()` or `group_right()`. #7839
* [BUGFIX] Analyze Grafana: fix parsing queries with variables. #8062
* [BUGFIX] `mimirtool rules sync`: detect a change when the `query_offset` or the deprecated `evaluation_delay` configuration changes. #8297
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