[dbnode] Add continuous file profile with RPC endpoint (#2416)

src/dbnode/generated/thrift/generate.sh

@@ -8,6 +8,7 @@ docker run --rm hello-world >/dev/null
 
 # generate files using dockerized thrift-gen
 THRIFT_IMAGE_VERSION=${THRIFT_IMAGE_VERSION:-"quay.io/m3db/thrift-gen:0.1.0"}
+echo "Generating thrift files with image: $THRIFT_IMAGE_VERSION"
 
 UID_FLAGS="-u $(id -u)"
 if [[ -n "$BUILDKITE" ]]; then

src/dbnode/generated/thrift/rpc.thrift

@@ -80,6 +80,8 @@ service Node {
 	NodeWriteNewSeriesLimitPerShardPerSecondResult setWriteNewSeriesLimitPerShardPerSecond(1: NodeSetWriteNewSeriesLimitPerShardPerSecondRequest req) throws (1: Error err)
 
 	// Debug endpoints
+	DebugProfileStartResult debugProfileStart(1: DebugProfileStartRequest req) throws (1: Error err)
+	DebugProfileStopResult debugProfileStop(1: DebugProfileStopRequest req) throws (1: Error err)
 	DebugIndexMemorySegmentsResult debugIndexMemorySegments(1: DebugIndexMemorySegmentsRequest req) throws (1: Error err)
 }
 
@@ -489,6 +491,27 @@ struct Query {
   7: optional FieldQuery       field
 }
 
+struct DebugProfileStartRequest {
+	1: required string name
+	2: required string filePathTemplate
+	3: optional string interval
+	4: optional string duration
+	5: optional i64 debug
+	6: optional i64 conditionalNumGoroutinesGreaterThan
+	7: optional i64 conditionalNumGoroutinesLessThan
+	8: optional bool conditionalIsOverloaded
+}
+
+struct DebugProfileStartResult {
+}
+
+struct DebugProfileStopRequest {
+	1: required string name
+}
+
+struct DebugProfileStopResult {
+}
+
 struct DebugIndexMemorySegmentsRequest {
 	1: required string directory
 }