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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased

[v6.16.0] 2024-11-15

Changed

  • #117 Switch to golangci-lint and fix all the lint (lot of changes, some just formatting, some might have impact on functionality)
  • #118 Upgrade Go to 1.23
  • #119 Upgrade all deps

[v6.15.1] 2024-11-06

Added

  • #116 Add make test-release to test the release process and run it on the default branch.

Fixed

  • #115 Add qemu before release to fix the multi-platform release issue.

[v6.15.0] 2024-11-06

⚠️ This release never had any published artifacts. Use the v6.15.1 instead

Big thanks to @mohammedalics who did all the work on this release!

Added

  • #111 Add JSON logging support
  • #114 Add arm64 / multi-platform support

Fixed

  • #113 Remove docker remote version to use the default circleci version

[v6.14.0] 2024-01-22

Changed

  • #106 Upgraded Go to 1.21
  • #107 Upgraded all deps to latest versions

[v6.13.0] 2023-03-07

Added

  • #101 prometheusIngester add offset option to query, allowing to query bit older data to ensure consistency on prometheus compatible systems using remote write.

[v6.12.1] 2022-10-14

Added

  • #95 prometheusIngester sends user-agent header

Fixed

  • #96 prometheusIngester headers from environment value now works

[v6.12.0] 2022-10-06

Added

  • #94 prometheusIngester now can send custom headers to prometheus api server

[v6.11.1] 2022-06-28

Fixed

  • #88 slo-rules-generator does not output empty escalate label
  • #87 slo-exporter's SLO recording rule for uptime success events
  • slo-rules-generator now properly truncates files when overwriting them

[v6.11.0] 2022-01-19

Added

  • #77 Experimental slo-rules-generator tool

Changed

  • #78 Upgrade dependencies mainly to avoid reported CVEs in grafana/loki
  • #80 prometheus-ingester: Add staleness support and possibility to have shorter query interval
  • #81 Upgrade dependencies to avoid CVE in containerd and image-spec

[v6.10.0] 2021-09-17

Added

  • #69 Experimental Exemplars support for the prometheus_exporter module.

Fixed

  • #71 Fix corner cases in StringMap.Merge(), StringMap.Without()

[v6.9.0] 2021-07-14

Added

  • #60 New module eventMetadataRenamer

Changed

  • #54 Use strict unmarshal in relabel module
  • #57 Upgrade to Go 1.16

[v6.8.0] 2021-03-24

Added

[v6.7.1] 2021-02-15

Fixed

  • #44 Install missing ca-certificates to docker base image

[v6.7.0] 2021-01-29

Changed

  • #43 slo-event-producer: slo_matcher values are now regular expressions.

[v6.6.0] 2021-01-19

Added

Fixed

  • #39 Prometheus-exporter: Additional SLO event metadata does not get overwritten.

Changed

  • #40 Upgrade to Go 1.15

[v6.5.0] 2020-11-11

Changed

  • #28 Abstracted statistical classifier history to generic interface in new storage package.
  • #34 Prometheus recording rules: Unified computation for SLO classes uptime, uptime-alt (slo-expoter's SLO)
  • #34 Prometheus alerts: missing data alert now explicitly matches only enabled SLO domains
  • #32 Prometheus alerts, recording rules: now fully reflects our internal setup
  • #31 Grafana dashboard: SLO Drilldown shows current increase of events on background of error budget change

Fixed

  • #33 prometheus-ingester now always expose query_fails_total

Added

  • #32 Grafana dashboard: SLO Effective Burn-rate

[v6.4.1] 2020-08-25

Fixed

  • #27 Empty configuration is now evaluated as invalid

[v6.4.0] 2020-08-07

Added

  • #25 --version command-line flag showing only the build version

[v6.3.0] 2020-08-05

Added

  • #24 DynamicClassifier: Allow use of comments in the CSV files, see the docs.

Fixed

  • #24 DynamicClassifier: Panic on CSV with unexpected number of fields.

[v6.3.0-rc1] 2020-08-04

Changed

  • #18 Tailer: Upgraded hpcloud/tail package to latest commit.

Added

  • #20 CI:
    • Release additional Docker image tags:
      • latest Latest released version.
      • vX Latest released version for the major version.
      • vX.Y Latest released version for the minor version.
    • Prebuilt binaries for:
      • slo-exporter_darwin_386
      • slo-exporter_darwin_amd64
      • slo-exporter_linux_386
      • slo-exporter_linux_amd64
      • slo-exporter_windows_386
      • slo-exporter_windows_amd64

[v6.2.0] 2020-07-29

Added

  • CI pipeline
    • build
    • on release, publish docker image and github release with binaries

[v6.1.0] 2020-06-30

Changed

  • Dockerfile labels
  • Dockerfile src image

Added

  • SLO computation recording rules, alerts
  • slo-exporter grafana dashboard

Fixed

  • PrometheusIngester: Fixed unit of the slo_exporter_prometheus_ingester_query_duration_seconds_bucket metric.

[v6.0.0] 2020-06-12

Changed

  • BREAKING Dropped the normalizer module in favour of the relabel and eventKeyGenerator modules. Those can be used to sanitize metadata values and compose the event key from any metadata keys.
  • BREAKING Dropped the eventFilter module in favour of the relabel module.
  • BREAKING sloEventProducer: dropped honor_slo_result configuration option, same behavior can be now achieved using failure conditions and metadata filters.
  • BREAKING sloEventProducer: all operators renamed
  • Dynamic classifier no longer exposes status_code label to unclassified events metric, you have to explicitly specify it in the unclassifiedEventMetadataKeys configuration option.
  • BREAKING Tailer: no longer sets the event key, use the eventKeyGenerator module.
  • BREAKING Tailer: no longer sets the SLO classification of the event, use the metadataClassifier module.

[v5.6.0] 2020-06-10

Added

  • New module relabel allowing to modify event metadata using Prometheus relabel config.
  • New flag --check-config to verify if configuration is ok.
  • Enabled mutex and block profiling.

Changed

  • Upgraded to Go 1.14
  • PrometheusIngester: added query_type label for slo_exporter_prometheus_ingester_query_fails_total metric

Fixed

  • PrometheusIngester: fixed isolation of histogram_increase query type causing invalid computation of increase.

[v5.5.0] 2020-05-28

Added

  • sloEventProducer: notEqualTo, notMatchesRegexp, numberNotEqualTo operators

[v5.4.1] 2020-05-27

Fixed

  • PrometheusIngester: last defined query shadows the previous ones

[v5.4.0] 2020-05-22

Changed

  • DynamicClassifier: Log entire event on unsuccessful classification.

Added

  • sloEventProducer: Expose metrics based on slo_rules configuration (exposeRulesAsMetrics slo_event_producer module option).

[v5.3.0] 2020-05-05

Added

  • New Prometheus-ingester's query configuration option 'resultAsQuantity'

[v5.2.0] 2020-05-05

Added

  • New module metadataClassifier to classify event based on it's metadata. See the docs for more info.

[v5.1.1] 2020-05-04

Changed

  • prometheus_exporter's LabelNames.sloApp default value now matches documented one (slo_app)

[v5.1.0] 2020-05-4

Added

  • sloEventProducer: Added new operators equalTo, numberEqualTo, numberEqualOrHigherThan and numberEqualOrLessThan.

[v5.0.0] 2020-04-30

Changed

  • BREAKING prometheusIngester: Renamed increase query type to counter_increase.
  • BREAKING sloEventProducer: Dropped unused configuration key event_type in rules file.

Added

  • Prometheus ingester: New query type histogram_increase to generate events with for each bucket.

[v4.4.0] 2020-04-27

Added

  • Prometheus ingester 'increase' query type
  • New module eventKeyGenerator to generate event key from its metadata. See the docs.
  • Generic metadata matcher for slo_event_producer

Changed

  • Prometheus ingester query types. (Existing named as 'simple')
  • Generalize eventKey access/usage for all ingesters by putting it to event.Metadata

[v4.3.0] 2020-04-08

Added

  • Possibility to dynamically set the log level using HTTP endpoint, see the docs.
  • StatisticalClassifier module now allows to set default weights.

Fixed

  • Fixed logging in reporting metrics from prometheus exporter module.

[v4.2.1] 2020-04-07

Fixed

[v4.2.0] 2020-04-07

Added

  • New module statisticalClassifier to classify events based on previous events classification statistical distribution. Read more in the module documentation.
  • Enabled mutex and blocking goroutine profiling in pprof.

[v4.1.0] 2020-03-30

Fixed

  • Fixed CPU usage burst caused by leaking timers.

Added

[v4.0.3] 2020-03-30

Fixed

  • Removed redundant namespacing for dynamic classifier metric events_processed_total.

[v4.0.2] 2020-03-29

Fixed

  • Kubernetes manifests fixed to use /liveness probe endpoint.

[v4.0.1] 2020-03-29

Fixed

  • Kubernetes manifests fixed to match the breaking changes in 4.0.0.

[v4.0.0] 2020-03-26

Changed

  • BREAKING Pipeline structure is now defined using the pipeline configuration option. For more information see the architecture documentation.
  • BREAKING The log_level configuration option was removed and replaced with the --log-level command line flag. Also it can be still configured with the ENV variable SLO_EXPORTER_LOGLEVEL.
  • BREAKING The --disable-timescale-exporter and --disable-prometheus-exporter flags were dropped in favor of dynamic pipeline structure configuration.
  • BREAKING The timescale exporter was dropped.
  • BREAKING The minimumGracefulShutdownDuration configuration option was replaced with afterPipelineShutdownDelay to be more intuitive.

[v3.2.0] - 2020-03-24

Refactored

  • HttpRequest.Headers, HttpRequest.Metadata is now filled only with data not matching conf.tailer.emptyGroupRE.
  • Drop frpcStatus as a dedicated attribute for HttpRequest.

[v3.1.0] - 2020-03-20

Refactored

  • If eventKey matching group in tailer RE is nonempty, its value is propagated to HttpRequest.EventKey.

[v3.0.0] - 2020-03-20

Fixed

  • Inconsistencies in aggregated SLO metrics exposed to Prometheus.
  • Normalizer now does not drop event if eventKey already set.

Refactored

  • Refactored prometheus exporter to implement Collector interface and to not require known labels beforehand.

Changed

  • BREAKING Event filter module now filters using metadata using metadataFilter. Old filteredHttpStatusCodeMatchers and filteredHttpHeaderMatchers were dropped.
  • BREAKING Failure criteria configuration synatx of sloEventProducer module has changed.
    • failure_criteria is now failure_conditions
    • criterium is now called operator
    • Operators are evaluated on event metadata. key field was added in order to specify on which metadata is the given operator to be evaluated.
    • Old criteria were dropped and newly available operators are matchesRegexp, numberHigherThan and durationHigherThan.
    • Example of new failure conditions syntax: 
      failure_conditions:
    - operator: matchesRegexp
      key: "metadataKey"
      value: ".*"

[v2.4.0] - 2020-03-16

Added

  • Possibility to add additional metadata labels to events_processed_total metric of dynamic classifier using unclassifiedEventMetadataKeys.

[v2.3.0] - 2020-03-16

Added

  • Slo_rules now support honor_slo_result.
  • All unknown named groups parsed by tailer are set as HTTP headers.

Fixed

  • Delayed graceful shutdown.

Changed

  • BREAKING Graceful shutdown timeout conf options.
    • gracefulShutdownTimeout replaced with maximumGracefulShutdownDuration.
    • afterGracefulShutdownDelay replaced with minimumGracefulShutdownDuration.

[v2.2.0] - 2020-03-16

Added

  • app_build_info metric

[v2.1.1] - 2020-03-13

Fixed

  • Fixed hanging shutdown when all modules ended without explicit termination request.

[v2.1.0] - 2020-03-12

Changed

  • Tailer line matching regular expression is now part of configuration.
  • Tailer is able to initialize event with SloClassification, if provided within log line.

Fixed

  • Update dynamic classifier cache with data from already classified event.
  • E2e-tests' run_tests.sh is now checking whether slo_exporter is running, before test will proceed.

[v2.0.0] - 2020-03-09

Added

  • Implemented prometheus ingester.
  • Optional gracefulShutdownTimeout configuration.

Changed

  • BREAKING Request event normalizer now uses regular expressions for filtering.
    • Config option filteredHttpStatusCodes is now filteredHttpStatusCodeMatchers and is list of regular expressions instead of integers.
    • Config option filteredHttpHeaders is now filteredHttpHeaderMatchers and is map of regular expression matching header name to regular expression matching header value.

Fixed

  • Refactored loading of event normalizer configuration.
  • StringMap.Without fixed logic and added tests.
  • StringMap.Merge do not return empty map when merged with nil.

[v1.4.0] - 2020-02-28

Added

  • Implemented graceful shutdown for each pipeline processor.

[v1.3.0] - 2020-02-28

Added

  • Process multiple domains from single data source.

Fixed

  • Typo in label failedToClassify.

[v1.2.3] - 2020-02-27

Added

  • Normalize also .ico files as :image.

[v1.2.2] - 2020-02-20

Config

  • Frontend API GraphQL endpoints without operationName are now classified as no_slo.

[v1.2.1] - 2020-02-19