Implement new alerting rule syntax

promql/ast.go

@@ -59,9 +59,7 @@ type AlertStmt struct {
 	Expr        Expr
 	Duration    time.Duration
 	Labels      model.LabelSet
-	Summary     string
-	Description string
-	Runbook     string
+	Annotations model.LabelSet
 }
 
 // EvalStmt holds an expression and information on the range it should

promql/lex.go

@@ -154,9 +154,7 @@ const (
 	itemIf
 	itemFor
 	itemWith
-	itemSummary
-	itemRunbook
-	itemDescription
+	itemAnnotations
 	itemKeepCommon
 	itemOffset
 	itemBy
@@ -186,9 +184,7 @@ var key = map[string]itemType{
 	"if":            itemIf,
 	"for":           itemFor,
 	"with":          itemWith,
-	"summary":       itemSummary,
-	"runbook":       itemRunbook,
-	"description":   itemDescription,
+	"annotations":   itemAnnotations,
 	"offset":        itemOffset,
 	"by":            itemBy,
 	"keeping_extra": itemKeepCommon,

promql/lex_test.go

@@ -241,14 +241,8 @@ var tests = []struct {
 		input:    "with",
 		expected: []item{{itemWith, 0, "with"}},
 	}, {
-		input:    "description",
-		expected: []item{{itemDescription, 0, "description"}},
-	}, {
-		input:    "summary",
-		expected: []item{{itemSummary, 0, "summary"}},
-	}, {
-		input:    "runbook",
-		expected: []item{{itemRunbook, 0, "runbook"}},
+		input:    "annotations",
+		expected: []item{{itemAnnotations, 0, "annotations"}},
 	}, {
 		input:    "offset",
 		expected: []item{{itemOffset, 0, "offset"}},

promql/parse.go

@@ -357,9 +357,9 @@ func (p *parser) stmt() Statement {
 
 // alertStmt parses an alert rule.
 //
-//		ALERT name IF expr [FOR duration] [WITH label_set]
-//			SUMMARY "summary"
-//			DESCRIPTION "description"
+//		ALERT name IF expr [FOR duration]
+//			[WITH label_set]
+//			[ANNOTATIONS label_set]
 //
 func (p *parser) alertStmt() *AlertStmt {
 	const ctx = "alert statement"
@@ -389,44 +389,10 @@ func (p *parser) alertStmt() *AlertStmt {
 		lset = p.labelSet()
 	}
 
-	var (
-		hasSum, hasDesc, hasRunbook bool
-		sum, desc, runbook          string
-	)
-Loop:
-	for {
-		switch p.next().typ {
-		case itemSummary:
-			if hasSum {
-				p.errorf("summary must not be defined twice")
-			}
-			hasSum = true
-			sum = p.unquoteString(p.expect(itemString, ctx).val)
-
-		case itemDescription:
-			if hasDesc {
-				p.errorf("description must not be defined twice")
-			}
-			hasDesc = true
-			desc = p.unquoteString(p.expect(itemString, ctx).val)
-
-		case itemRunbook:
-			if hasRunbook {
-				p.errorf("runbook must not be defined twice")
-			}
-			hasRunbook = true
-			runbook = p.unquoteString(p.expect(itemString, ctx).val)
-
-		default:
-			p.backup()
-			break Loop
-		}
-	}
-	if sum == "" {
-		p.errorf("alert summary missing")
-	}
-	if desc == "" {
-		p.errorf("alert description missing")
+	annotations := model.LabelSet{}
+	if p.peek().typ == itemAnnotations {
+		p.expect(itemAnnotations, ctx)
+		annotations = p.labelSet()
 	}
 
 	return &AlertStmt{
@@ -434,9 +400,7 @@ Loop:
 		Expr:        expr,
 		Duration:    duration,
 		Labels:      lset,
-		Summary:     sum,
-		Description: desc,
-		Runbook:     runbook,
+		Annotations: annotations,
 	}
 }
 
@@ -874,11 +838,20 @@ func (p *parser) labelMatchers(operators ...itemType) metric.LabelMatchers {
 
 		matchers = append(matchers, m)
 
+		if p.peek().typ == itemIdentifier {
+			p.errorf("missing comma before next identifier %q", p.peek().val)
+		}
+
 		// Terminate list if last matcher.
 		if p.peek().typ != itemComma {
 			break
 		}
 		p.next()
+
+		// Allow comma after each item in a multi-line listing.
+		if p.peek().typ == itemRightBrace {
+			break
+		}
 	}
 
 	p.expect(itemRightBrace, ctx)

promql/parse_test.go

@@ -1153,15 +1153,19 @@ var testStatement = []struct {
 			    service = "testservice"
 			    # ... more fields here ...
 			  }
-			  SUMMARY "Global request rate low"
-			  DESCRIPTION "The global request rate is low"
+			  ANNOTATIONS {
+			    summary     = "Global request rate low",
+			    description = "The global request rate is low"
+			  }
 
 			foo = bar{label1="value1"}
 
 			ALERT BazAlert IF foo > 10
-			  DESCRIPTION "BazAlert"
-			  RUNBOOK     "http://my.url"
-			  SUMMARY     "Baz"
+			  ANNOTATIONS {
+			    description = "BazAlert",
+			    runbook     = "http://my.url",
+			    summary     = "Baz",
+			  }
 		`,
 		expected: Statements{
 			&RecordStmt{
@@ -1198,8 +1202,10 @@ var testStatement = []struct {
 				}},
 				Labels:   model.LabelSet{"service": "testservice"},
 				Duration: 5 * time.Minute,
-				Summary:     "Global request rate low",
-				Description: "The global request rate is low",
+				Annotations: model.LabelSet{
+					"summary":     "Global request rate low",
+					"description": "The global request rate is low",
+				},
 			},
 			&RecordStmt{
 				Name: "foo",
@@ -1225,9 +1231,11 @@ var testStatement = []struct {
 					RHS: &NumberLiteral{10},
 				},
 				Labels: model.LabelSet{},
-				Summary:     "Baz",
-				Description: "BazAlert",
-				Runbook:     "http://my.url",
+				Annotations: model.LabelSet{
+					"summary":     "Baz",
+					"description": "BazAlert",
+					"runbook":     "http://my.url",
+				},
 			},
 		},
 	}, {
@@ -1248,8 +1256,10 @@ var testStatement = []struct {
 		},
 	}, {
 		input: `ALERT SomeName IF some_metric > 1 
-			SUMMARY "Global request rate low"
-			DESCRIPTION "The global request rate is low"
+			ANNOTATIONS {
+			  summary = "Global request rate low",
+			  description = "The global request rate is low"
+			}
 		`,
 		expected: Statements{
 			&AlertStmt{
@@ -1265,8 +1275,10 @@ var testStatement = []struct {
 					RHS: &NumberLiteral{1},
 				},
 				Labels: model.LabelSet{},
-				Summary:     "Global request rate low",
-				Description: "The global request rate is low",
+				Annotations: model.LabelSet{
+					"summary":     "Global request rate low",
+					"description": "The global request rate is low",
+				},
 			},
 		},
 	}, {
@@ -1276,8 +1288,10 @@ var testStatement = []struct {
 			    service = "testservice"
 			    # ... more fields here ... 
 			  }
-			  SUMMARY "Global request rate low"
-			  DESCRIPTION "The global request rate is low"
+			  ANNOTATIONS {
+			    summary = "Global request rate low"
+			    description = "The global request rate is low"
+			  }
 	  	`,
 		fail: true,
 	}, {
@@ -1323,16 +1337,6 @@ var testStatement = []struct {
 			DESCRIPTION "The global request rate is low"
 		`,
 		fail: true,
-	}, {
-		input: `ALERT SomeName IF some_metric > 1 WITH {} 
-			SUMMARY "Global request rate low"
-		`,
-		fail: true,
-	}, {
-		input: `ALERT SomeName IF some_metric > 1 
-			DESCRIPTION "The global request rate is low"
-		`,
-		fail: true,
 	},
 	// Fuzzing regression tests.
 	{

promql/printer.go

@@ -109,8 +109,9 @@ func (node *AlertStmt) String() string {
 	if len(node.Labels) > 0 {
 		s += fmt.Sprintf("\n\tWITH %s", node.Labels)
 	}
-	s += fmt.Sprintf("\n\tSUMMARY %q", node.Summary)
-	s += fmt.Sprintf("\n\tDESCRIPTION %q", node.Description)
+	if len(node.Annotations) > 0 {
+		s += fmt.Sprintf("\n\tANNOTATIONS %s", node.Labels)
+	}
 	return s
 }