Allow otel module directives

https://nginx.org/en/docs/ngx_otel_module.html

Author: puneetsarna

analyze.go

@@ -1010,6 +1010,24 @@ var directives = map[string][]uint{
 		ngxHTTPMainConf | ngxHTTPSrvConf | ngxHTTPLocConf | ngxConfTake1234,
 		ngxStreamMainConf | ngxStreamSrvConf | ngxConfTake1234,
 	},
+	"otel_exporter": {
+		ngxHTTPMainConf | ngxConfBlock | ngxConfNoArgs,
+	},
+	"otel_service_name": {
+		ngxHTTPMainConf | ngxConfTake1,
+	},
+	"otel_span_attr": {
+		ngxHTTPMainConf | ngxHTTPSrvConf | ngxHTTPLocConf | ngxConfTake2,
+	},
+	"otel_span_name": {
+		ngxHTTPMainConf | ngxHTTPSrvConf | ngxHTTPLocConf | ngxConfTake1,
+	},
+	"otel_trace": {
+		ngxHTTPMainConf | ngxHTTPSrvConf | ngxHTTPLocConf | ngxConfTake1,
+	},
+	"otel_trace_context": {
+		ngxHTTPMainConf | ngxHTTPSrvConf | ngxHTTPLocConf | ngxConfTake1,
+	},
 	"output_buffers": {
 		ngxHTTPMainConf | ngxHTTPSrvConf | ngxHTTPLocConf | ngxConfTake2,
 	},

analyze_map.go

@@ -41,6 +41,9 @@ var mapBodies = map[string]mapParameterMasks{
 	"geoip2": {
 		defaultMasks: ngxConf1More,
 	},
+	"otel_exporter": {
+		defaultMasks: ngxConfTake1,
+	},
 }
 
 // analyzeMapBody validates the body of a map-like directive. Map-like directives are block directives

analyze_map_test.go

@@ -175,6 +175,27 @@ func TestAnalyzeMapBody(t *testing.T) {
 			},
 			term: ";",
 		},
+		"valid otel_exporter": {
+			mapDirective: "otel_exporter",
+			parameter: &Directive{
+				Directive: "endpoint",
+				Args:      []string{"localhost:4317"},
+				Line:      5,
+				Block:     Directives{},
+			},
+			term: ";",
+		},
+		"invalid otel_exporter": {
+			mapDirective: "otel_exporter",
+			parameter: &Directive{
+				Directive: "endpoint",
+				Args:      []string{"localhost:4317", "localhost:1234"},
+				Line:      5,
+				Block:     Directives{},
+			},
+			term:    ";",
+			wantErr: &ParseError{What: "invalid number of parameters", BlockCtx: "otel_exporter"},
+		},
 		"missing semicolon": {
 			mapDirective: "map",
 			parameter: &Directive{