如何调试grpc调用？

Question

我想弄清楚为什么我的grpc调用不起作用，但我不知道如何打开调试，所以我可以看到通过grpc连接发送和接收的数据。

如何打开grpc调用调试？

Answer 1

您可以将GRPC_TRACE环境变量设置为all有GRPC倾倒了一大堆的数据什么的连接是这样做的：

export GRPC_TRACE=all 

编辑从评论：显然你还需要设置：

export GRPC_VERBOSITY=DEBUG 

Answer 2

在Golang，你需要设置GODEBUG environment variable看到HTTP2痕迹，即由报头设置GRPC：

GODEBUG=http2debug=1 # enable verbose HTTP/2 debug logs 
GODEBUG=http2debug=2 # ... even more verbose, with frame dumps 

输出将被发送到标准输出。这里是一个例子：

{"level":"info","msg":"2017/06/11 08:52:20 http2: Framer 0xc42009c0e0: wrote SETTINGS len=0","time":"2017-06-11T08:52:20Z"} 
{"level":"info","msg":"2017/06/11 08:52:20 http2: Framer 0xc42009c0e0: wrote WINDOW_UPDATE len=4 (conn) incr=983025","time":"2017-06-11T08:52:20Z"} 
{"level":"info","msg":"2017/06/11 08:52:20 http2: Framer 0xc42009c0e0: read SETTINGS len=18, settings: ENABLE_PUSH=0, MAX_CONCURRENT_STREAMS=0, INITIAL_WINDOW_SIZE=1048576","time":"2017-06-11T08:52:20Z"} 
{"level":"info","msg":"2017/06/11 08:52:20 http2: Framer 0xc42009c0e0: read WINDOW_UPDATE len=4 (conn) incr=983041","time":"2017-06-11T08:52:20Z"} 
{"level":"info","msg":"2017/06/11 08:52:20 http2: Framer 0xc42009c0e0: wrote SETTINGS flags=ACK len=0","time":"2017-06-11T08:52:20Z"} 
{"level":"info","msg":"2017/06/11 08:52:20 http2: Framer 0xc42009c0e0: read SETTINGS flags=ACK len=0","time":"2017-06-11T08:52:20Z"} 
{"level":"info","msg":"2017/06/11 08:52:20 http2: Framer 0xc42009c0e0: read HEADERS flags=END_HEADERS|PRIORITY stream=3 len=249","time":"2017-06-11T08:52:20Z"} 
{"level":"info","msg":"2017/06/11 08:52:20 http2: decoded hpack field header field \":authority\" = \"\"","time":"2017-06-11T08:52:20Z"} 
{"level":"info","msg":"2017/06/11 08:52:20 http2: decoded hpack field header field \":path\" = \"/internal.push.v1.UnifiedDevicePush/SendMessage\"","time":"2017-06-11T08:52:20Z"} 
{"level":"info","msg":"2017/06/11 08:52:20 http2: decoded hpack field header field \":method\" = \"POST\"","time":"2017-06-11T08:52:20Z"} 
{"level":"info","msg":"2017/06/11 08:52:20 http2: decoded hpack field header field \":scheme\" = \"http\"","time":"2017-06-11T08:52:20Z"} 
{"level":"info","msg":"2017/06/11 08:52:20 http2: decoded hpack field header field \"content-type\" = \"application/grpc\"","time":"2017-06-11T08:52:20Z"} 
{"level":"info","msg":"2017/06/11 08:52:20 http2: decoded hpack field header field \"te\" = \"trailers\"","time":"2017-06-11T08:52:20Z"} 
{"level":"info","msg":"2017/06/11 08:52:20 http2: decoded hpack field header field \"user-agent\" = \"grpc-java-netty/1.0.3\"","time":"2017-06-11T08:52:20Z"} 
{"level":"info","msg":"2017/06/11 08:52:20 http2: decoded hpack field header field \"root-common.xirequestid-bin\" = \"ChIJzE6lBfCTCsYRoIIJujc92JY=\"","time":"2017-06-11T08:52:20Z"} 
{"level":"info","msg":"2017/06/11 08:52:20 http2: decoded hpack field header field \"te\" = \"trailers\"","time":"2017-06-11T08:52:20Z"}