Add multiple sources for inhibition rules

CHANGELOG.md

@@ -19,6 +19,7 @@
 * [BUGFIX] Fix duplicate `other` in error messages for config. #4366
 * [BUGFIX] Fix logic that considers an alert reopened in Jira. #4478
 * [BUGFIX] Fix Jira issue count #4615
+* [FEATURE] Add Multiple Sources support for Inhibition Rules. #4504
 
 ## 0.28.1 / 2025-03-07
 

README.md

@@ -160,6 +160,23 @@ inhibit_rules:
   #   the inhibition rule will apply!
   equal: ['alertname']
 
+# Multiple Sources can be defined when setting inhibitions.
+# When all source matchers are matched, the inhibition is applied to
+# the target alerts.
+
+inhibit_rules:
+  - sources:
+      - matchers:
+          - alertname="instance_down"
+          - application="abc"
+        equal: ["cluster"]
+      - matchers:
+          - alertname="instance_down"
+          - application="xyz"
+        equal: ["severity"]
+    target_matchers:
+      - alertname="no_info"
+      - application="def"
 
 receivers:
 - name: 'team-X-mails'

config/config.go

@@ -1002,6 +1002,11 @@ func (r *Route) UnmarshalYAML(unmarshal func(any) error) error {
 	return nil
 }
 
+type InhibitRuleSource struct {
+	SrcMatchers Matchers `yaml:"matchers,omitempty" json:"matchers,omitempty"`
+	Equal       []string `yaml:"equal,omitempty" json:"equal,omitempty"`
+}
+
 // InhibitRule defines an inhibition rule that mutes alerts that match the
 // target labels if an alert matching the source labels exists.
 // Both alerts have to have a set of labels being equal.
@@ -1016,6 +1021,9 @@ type InhibitRule struct {
 	SourceMatchRE MatchRegexps `yaml:"source_match_re,omitempty" json:"source_match_re,omitempty"`
 	// SourceMatchers defines a set of label matchers that have to be fulfilled for source alerts.
 	SourceMatchers Matchers `yaml:"source_matchers,omitempty" json:"source_matchers,omitempty"`
+	// Sources defines a set of source matchers and equal labels for source alerts.
+	// All Source entries have to match for the inhibition to take effect.
+	Sources []InhibitRuleSource `yaml:"sources,omitempty" json:"sources,omitempty"`
 	// TargetMatch defines a set of labels that have to equal the given
 	// value for target alerts. Deprecated. Remove before v1.0 release.
 	TargetMatch map[string]string `yaml:"target_match,omitempty" json:"target_match,omitempty"`