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Netty Prometheus Integration

See original GitHub issue

Following the Metrics Reporting Guide the server sets up a metric reporter using GrpcServer.default. When I attempt to use GrpcServer.netty I get the following error when pointing prometheus at the service:

INFO: Transport failed
io.netty.handler.codec.http2.Http2Exception: Unexpected HTTP/1.x request: GET /metrics my_server
at io.netty.handler.codec.http2.Http2Exception.connectionError(Http2Exception.java:85)
at io.netty.handler.codec.http2.Http2ConnectionHandler$PrefaceDecoder.readClientPrefaceString(Http2ConnectionHandler.java:314)
at io.netty.handler.codec.http2.Http2ConnectionHandler$PrefaceDecoder.decode(Http2ConnectionHandler.java:251)
....

Is it possible to use this metric reporter with the netty server version?

Hopefully relevant code bits:

object CombinedServerMain extends IOApp with CommonRuntime {
...
override def run(args: List[String]): IO[ExitCode] = {
    for {
      metricsOps <- PrometheusMetrics.build[IO](CollectorRegistry.defaultRegistry)
      interceptor = MetricsServerInterceptor(metricsOps)
      accountService <- AccountService.bindService[IO].map(_.interceptWith(interceptor)).map(AddService)
      server <- GrpcServer.netty[IO](10123, accountService :: Nil)
      runServer <- GrpcServer.server[IO](server).as(ExitCode.Success)
    } yield runServer
}

Issue Analytics

State:
Created 4 years ago
Comments:7 (3 by maintainers)

Top GitHub Comments

1reaction

TannerYoungcommented, Oct 8, 2019

When using GrpcServer.default[IO] instead of netty; I get the following exception:

java.lang.NoClassDefFoundError: io/grpc/internal/WithLogId
	at java.lang.ClassLoader.defineClass1(Native Method)
 	at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
 	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
 	at java.net.URLClassLoader.defineClass(URLClassLoader.java:468)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
 	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
 	at io.grpc.netty.shaded.io.grpc.netty.NettyServerBuilder.buildTransportServer(NettyServerBuilder.java:432)
 	at io.grpc.netty.shaded.io.grpc.netty.NettyServerBuilder.buildTransportServer(NettyServerBuilder.java:55)
	at io.grpc.internal.AbstractServerImplBuilder.build(AbstractServerImplBuilder.java:223)
	at higherkindness.mu.rpc.server.GrpcServer$.buildServer(GrpcServer.scala:113)

Is prometheus integration in a known good state and I’m doing something wrong? Is there updated documentation on how to use it? I’m dependening on the following targets:

io.higherkindness:mu-rpc-netty:0.18.4
io.higherkindness:mu-rpc-server:0.18.4
io.higherkindness:mu-rpc-prometheus:0.18.4

0reactions

fedefernandezcommented, Oct 10, 2019

Glad it worked. I’ve created an issue #677

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