Add OpenFeature providers (#101071)

* Add OpenFeature provider * Simplify static provider * Linting * Apply review feedback * Codeowner for deps * Update pkg/services/featuremgmt/openfeature.go Co-authored-by: Dave Henderson <dave.henderson@grafana.com> * Apply review comments part2 * Remove from sample.ini for now * fixup! Apply review comments part2 * Add example of context config * Resolve conflict * Run update workspaces --------- Co-authored-by: Dave Henderson <dave.henderson@grafana.com>
2025-03-06 15:09:26 +01:00
parent b6221cc389
commit c9ab1142e1
15 changed files with 375 additions and 1 deletions
@@ -0,0 +1,71 @@
+package featuremgmt
+
+import (
+	"fmt"
+
+	"github.com/grafana/grafana/pkg/setting"
+	"github.com/open-feature/go-sdk/openfeature"
+)
+
+const (
+	staticProviderType = "static"
+	goffProviderType   = "goff"
+
+	configSectionName  = "feature_toggles.openfeature"
+	contextSectionName = "feature_toggles.openfeature.context"
+)
+
+type OpenFeatureService struct {
+	provider openfeature.FeatureProvider
+	Client   openfeature.IClient
+}
+
+func ProvideOpenFeatureService(cfg *setting.Cfg) (*OpenFeatureService, error) {
+	conf := cfg.Raw.Section(configSectionName)
+	provType := conf.Key("provider").MustString(staticProviderType)
+	url := conf.Key("url").MustString("")
+	key := conf.Key("targetingKey").MustString(cfg.AppURL)
+
+	var provider openfeature.FeatureProvider
+	var err error
+	if provType == goffProviderType {
+		provider, err = newGOFFProvider(url)
+	} else {
+		provider, err = newStaticProvider(cfg)
+	}
+
+	if err != nil {
+		return nil, fmt.Errorf("failed to create %s feature provider: %w", provType, err)
+	}
+
+	if err := openfeature.SetProviderAndWait(provider); err != nil {
+		return nil, fmt.Errorf("failed to set global %s feature provider: %w", provType, err)
+	}
+
+	attrs := ctxAttrs(cfg)
+	openfeature.SetEvaluationContext(openfeature.NewEvaluationContext(key, attrs))
+
+	client := openfeature.NewClient("grafana-openfeature-client")
+
+	return &OpenFeatureService{
+		provider: provider,
+		Client:   client,
+	}, nil
+}
+
+// ctxAttrs uses config.ini [feature_toggles.openfeature.context] section to build the eval context attributes
+func ctxAttrs(cfg *setting.Cfg) map[string]any {
+	ctxConf := cfg.Raw.Section(contextSectionName)
+
+	attrs := map[string]any{}
+	for _, key := range ctxConf.KeyStrings() {
+		attrs[key] = ctxConf.Key(key).String()
+	}
+
+	// Some default attributes
+	if _, ok := attrs["grafana_version"]; !ok {
+		attrs["grafana_version"] = setting.BuildVersion
+	}
+
+	return attrs
+}