Merge pull request #238 from bitcoin-sv/feature/mtm-health

Feature/mtm health

Dockerfile

@@ -1,13 +1,18 @@
 FROM ubuntu:latest
 
-RUN apt-get update && apt-get install ca-certificates -y && apt-get clean && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install ca-certificates wget -y && apt-get clean && rm -rf /var/lib/apt/lists/*
 
 COPY ./build/arc_linux_amd64 /service/arc
 
 WORKDIR /service
 
+# Add grpc_health_probe
+RUN GRPC_HEALTH_PROBE_VERSION=v0.4.24 && \
+    wget -qO/bin/grpc_health_probe https://github.com/grpc-ecosystem/grpc-health-probe/releases/download/${GRPC_HEALTH_PROBE_VERSION}/grpc_health_probe-linux-amd64 && \
+    chmod +x /bin/grpc_health_probe
+
 RUN chmod +x arc
 
 EXPOSE 9090
 
-CMD ["/service/arc"]
+CMD ["/service/arc"]

Makefile

@@ -60,6 +60,14 @@ gen:
 	--go-grpc_opt=paths=source_relative \
 	metamorph/metamorph_api/metamorph_api.proto
 
+	protoc \
+	--proto_path=. \
+	--go_out=. \
+	--go_opt=paths=source_relative \
+	--go-grpc_out=. \
+	--go-grpc_opt=paths=source_relative \
+	metamorph/health/grpc_health_check.proto
+
 	protoc \
 	--proto_path=. \
 	--go_out=. \

metamorph/health/grpc_health_check.proto

@@ -0,0 +1,25 @@
+syntax = "proto3";
+
+option go_package = ".;healthcheck";
+
+package grpc.health.v1;
+
+message HealthCheckRequest {
+  string service = 1;
+}
+
+message HealthCheckResponse {
+  enum ServingStatus {
+    UNKNOWN = 0;
+    SERVING = 1;
+    NOT_SERVING = 2;
+    SERVICE_UNKNOWN = 3;  // Used only by the Watch method.
+  }
+  ServingStatus status = 1;
+}
+
+service Health {
+  rpc Check(HealthCheckRequest) returns (HealthCheckResponse);
+
+  rpc Watch(HealthCheckRequest) returns (stream HealthCheckResponse);
+}