大家好，我是烤鸭：

​ ​ ​ ​ 由于skywalking 的 -Dskywalking.collector.backend_service 的后端服务过多，想通过配置域名的方式简化上报端agent配置，也更灵活。

报错了，先看代码

报错信息：

org.apache.skywalking.apm.dependencies.io.grpc.StatusRuntimeException: INTERNAL: http2 exception
at org.apache.skywalking.apm.dependencies.io.grpc.stub.ClientCalls.toStatusRuntimeException(ClientCalls.java:262)
at org.apache.skywalking.apm.dependencies.io.grpc.stub.ClientCalls.getUnchecked(ClientCalls.java:243)
at org.apache.skywalking.apm.dependencies.io.grpc.stub.ClientCalls.blockingUnaryCall(ClientCalls.java:156)
at org.apache.skywalking.apm.network.language.agent.v3.JVMMetricReportServiceGrpc$JVMMetricReportServiceBlockingStub.collect(JVMMetricReportServiceGrpc.java:181)
at org.apache.skywalking.apm.agent.core.jvm.JVMMetricsSender.run(JVMMetricsSender.java:82)
at org.apache.skywalking.apm.util.RunnableWithExceptionProtection.run(RunnableWithExceptionProtection.java:33)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.skywalking.apm.dependencies.io.netty.handler.codec.http2.Http2Exception: First received frame was not SETTINGS. Hex dump for first 5 bytes: 485454502f
at org.apache.skywalking.apm.dependencies.io.netty.handler.codec.http2.Http2Exception.connectionError(Http2Exception.java:103)
at org.apache.skywalking.apm.dependencies.io.netty.handler.codec.http2.Http2ConnectionHandler$PrefaceDecoder.verifyFirstFrameIsSettings(Http2ConnectionHandler.java:338)
at org.apache.skywalking.apm.dependencies.io.netty.handler.codec.http2.Http2ConnectionHandler$PrefaceDecoder.decode(Http2ConnectionHandler.java:239)

因为这个问题，有个人还专门提了issue和提交。

https://github.com/apache/skywalking/issues/6040
想使用grpc的话(还没有证书)，开启配置。

agent.config 中设置 agent.force_tls 为 true 或者脚本中增加

-Dskywalking.agent.force_tls=true

agent.force_tls=${SW_AGENT_FORCE_TLS:true}

代码片段：

GRPCChannelManager.run 方法里的初始化 channel 里的 new TLSChannelBuilder()

managedChannel = GRPCChannel.newBuilder(ipAndPort[0], Integer.parseInt(ipAndPort[1]))
                            .addManagedChannelBuilder(new StandardChannelBuilder())
                            .addManagedChannelBuilder(new TLSChannelBuilder())
                            .addChannelDecorator(new AgentIDDecorator())
                            .addChannelDecorator(new AuthenticationDecorator())
                            .build(); 

nginx 配置

按照以前的 http_proxy的方式是不行的，skywalking 是通过 grpc 方式通信的。

# grpc 代理配置
server {
	listen 11800 http2; # grpc方式对外暴露端口
	server_name xxx.xx.com;
	# access_log logs/access.log main;
	location / {
		grpc_pass grpc://127.0.0.1:11800; # 此处配置grpc服务的ip和端口
	}
}

# http 代理配置
server {
	listen 80; # http方式对外暴露端口
	server_name localhost;
	# access_log logs/access.log main;
	location / {
		proxy_pass http://127.0.0.1:8210; # 此处配置http服务的ip和端口
	}
}

重点注意！！！

http2 和 http的端口不能重复。
具体原因看这篇。
https://blog.csdn.net/Angry_Mills/article/details/118227489

修改配置

-Dskywalking.collector.backend_service=xxx.xx.com:11800