Skip context.Canceled error in grpc logging interceptors

context.Canceled is returned by grpc stream.Recv when you stop promscale with Ctrl-C.Skip logging the above error as the behavior is expected.

Signed-off-by: Arunprasad Rajkumar <ar.arunprasad@gmail.com>

pkg/runner/runner.go

@@ -9,6 +9,7 @@ package runner
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"net"
 	"net/http"
@@ -57,15 +58,15 @@ func init() {
 
 func loggingUnaryInterceptor(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
 	m, err := handler(ctx, req)
-	if err != nil {
+	if err != nil && !errors.As(err, &context.Canceled) {
 		log.Error("msg", "error in GRPC call", "err", err)
 	}
 	return m, err
 }
 
 func loggingStreamInterceptor(srv interface{}, ss grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
 	err := handler(srv, ss)
-	if err != nil {
+	if err != nil && !errors.As(err, &context.Canceled) {
 		log.Error("msg", "error in GRPC call", "err", err)
 	}
 	return err