This is a big one 😆 (check #664)

Highlights

Changed

• Split image registry and repository in Helm chart
• ⚠️(BREAKING) Internally Sloth (not k8s) prometheusServiceLevel uses k8s k8s.io/apimachinery/pkg/util/yaml lib for unmarshaling YAML instead of gopkg.in/yaml.v2.
• Core SLO validation and SLO rules generation migrated to SLO plugins.
• ⚠️(BREAKING) --sli-plugins-path, --slo-plugins-path, -m args and it's env vars SLOTH_SLI_PLUGINS_PATHand SLOTH_SLO_PLUGINS_PATH have been removed in favor or --plugins-path, -p and it's env var SLOTH_PLUGINS_PATH that discovers and loads SLI and SLO plugins with a single flag.
• Simplify validation and improve validation message by using custom logic instead of go-playground/validator.
• ⚠️(BREAKING) --disable-optimized-rules flag and associated env var has been removed.**
• (BREAKING) Helm chart has removed the option for disabling optimized rules.
• Update to Kubernetes v1.34.
• Update to Go v1.25.

Added

• Sloth domain models can be imported in Go apps using github.com/slok/sloth/pkg/common/model.
• Sloth conventions can be imported in Go apps using github.com/slok/sloth/pkg/common/conventions.
• Sloth SLO validation logic can be imported in Go apps using github.com/slok/sloth/pkg/common/validation.
• A new SLO rule generation plugin system has been added to be able to change/extend the SLO rule generation process.
• SLO plugins can be loaded from FS directories recursively using --plugins-path in the commands.
• SLO plugins have a priority value to be able to order in the execution chain.
• Sloth regular (non-k8s) prometheus/v1 API support for SLO plugins at SLO group level and per SLO level.
• Sloth K8s CRD sloth.slok.dev/v1/PrometheusServiceLevel API support for SLO plugins at SLO group level and per SLO level.
• Allow overriding previous declared SLO plugins (includes defaults) at SLO group and SLO level.
• SLO plugins can access env vars and use OS/exec by default.
• Allow github.com/caarlos0/env/v11 module in SLO plugins.
• Add --slo-plugins and -s flag (generate and k8s controller) to be able to declare SLO plugins at cmd level, these plugins will be applied to all SLOs.
• Add --disable-default-slo-plugins flag (generate and k8s controller) to be able to disable default Sloth SLO plugins.
• Helm chart supports node selector.

Details (Per PR and autogenerated)

What's Changed

• Prepare deployoment manifests release for v0.12.0 by @slok in #556
• Add Stale CI to autoclose issues and PRs by @slok in #559
• Start moving models to an importable own package by @slok in #561
• Move more to conventions and utils to be importable by @slok in #562
• Move sli plugins loader and reader to independent packages by @slok in #563
• Move prom SLO IO writer to storage package by @slok in #564
• Move merge label to utils by @slok in #565
• Move sloth prom spec loader to storage package by @slok in #566
• Move open SLO spec loader to storage package by @slok in #567
• build(deps): bump github.com/go-playground/validator/v10 from 10.25.0 to 10.26.0 by @dependabot[bot] in #568
• Split image registry and repository from Helm chart by @QuantumEnigmaa in #491
• Move K8s YAML and CR loaders to storage package by @slok in #569
• Add a middle domain model for prom rules by @slok in #570
• Move apiserver storage to storage package by @slok in #571
• Move kubernetes logic to their own packages in storage by @slok in #572
• Add SLO generation as a chain of processors by @slok in #573
• build(deps): bump golang from 1.24.1-alpine to 1.24.2-alpine in /docker/prod by @dependabot[bot] in #574
• Add SLO rule generation plugin system by @slok in #575
• Add intervals to prom rule models by @slok in #576
• Add SLO plugin and SLO plugin repository on domain layer by @slok in #577
• Add missing SLO plugin unit test usage on domain app by @slok in #578
• Add priority to have SLO plugins execution order in the chain by @slok in #579
• Update project status on readme by @slok in #580
• Add debug core SLO plugin by @slok in #581
• build(deps): bump github.com/prometheus/client_golang from 1.21.1 to 1.22.0 by @dependabot[bot] in #583
• Add support for SLO plugins on default (non-k8s) sloth prometheus service level spec by @slok in #584
• Move SLO validation to an SLO plugin by @slok in #585
• Add the original SLO group source information to the plugin request by @slok in #586
• fix: update go version go.mod by @wbollock in #588
• Aggregate SLO and SLI plugin file loader into a single repo that discovers both and change flags to improve usage by @slok in #589
• Migrate to mockery v3 by @slok in #590
• build(deps): bump sigs.k8s.io/structured-merge-diff/v4 from 4.6.0 to 4.7.0 by @dependabot[bot] in #592
• Add support for SLO plugins on Kubernetes API by @slok in #591
• Fix naming on k8s plugin example by @slok in #593
• Add overridePrevious as a way of resetting the declared previous chain by @slok in #595
• build(deps): bump github.com/prometheus-operator/prometheus-operator/pkg/client from 0.81.0 to 0.82.0 by @dependabot[bot] in #597
• Simplify and improve validator by @slok in #600
• Remove not optimized SLI rule generation flag by @slok in #601
• Pass default plugins as a chain by @slok in #603
• Support env vars on SLO plugins by @slok in #604
• Allow SLO plugins at application level using cmd flags by @slok in #605
• Add SLO plugin readmes by @slok in #606
• Fix readme on validate plugin by @slok in #609
• build(deps): bump golang from 1.24.2-alpine to 1.24.3-alpine in /docker/prod by @dependabot[bot] in #612
• [FEAT] add helm chart nodeselector property by @pgmrey in #613
• Allow disabling default plugins using a cmd flag on CLI and k8s controller modes by @slok in #614
• Update Prometheus dep to v3.4.0 by @slok in #619
• build(deps): bump github.com/prometheus/common from 0.63.0 to 0.64.0 by @dependabot[bot] in #617
• Update to Kubernetes v1.33 by @slok in #620
• Update prom operator dependencies by @slok in #622
• build(deps): bump github.com/prometheus/prometheus from 0.304.0 to 0.304.1 by @dependabot[bot] in #625
• build(deps): bump golang from 1.24.3-alpine to 1.24.4-alpine in /docker/prod by @dependabot[bot] in #627
• build(deps): bump github.com/prometheus/common from 0.64.0 to 0.65.0 by @dependabot[bot] in #632
• build(deps): bump github.com/oklog/run from 1.1.0 to 1.2.0 by @dependabot[bot] in #636
• Update deps and add support for go 1.25 and k8s 1.34 by @slok in #662
• Prepare for v0.13.0 by @slok in #663

New Contributors

• @QuantumEnigmaa made their first contribution in #491
• @wbollock made their first contribution in #588
• @pgmrey made their first contribution in #613

Full Changelog: v0.12.0...v0.13.0