如何调试grpc调用？

Question

我试图找出为什么我的grpc调用不起作用,但我无法弄清楚如何打开调试,所以我可以看到通过grpc连接发送和接收的数据.

你如何打开grpc调用的调试？

Answer 1

您可以将GRPC_TRACE环境变量设置all为让grpc转储有关连接正在执行的操作的大量数据:

export GRPC_TRACE=all

从评论中编辑:显然你还需要设置:

export GRPC_VERBOSITY=DEBUG

Answer 2

在Golang中，您需要设置GODEBUG环境变量以查看HTTP2跟踪，即gRPC设置的标头：

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

然后将输出发送到stdout。这是一个例子：

{"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"}

Answer 3

导出 GRPC_GO_LOG_VERBOSITY_LEVEL=99
导出 GRPC_GO_LOG_SEVERITY_LEVEL=信息

用最新的 grpc go 版本试试这个。

Answer 4

来自文档

GRPC_VERBOSITY用于设置 gRPC 打印的日志消息的最低级别（支持的值为DEBUG、INFO和ERROR）。如果未设置该环境变量，则仅ERROR打印日志。

另外，检查GRPC_TRACE

grpc环境变量有15+个

Windows 用户注意事项，引用自文档：

已知限制：GPRC_TRACE=tcp目前尚未针对 Windows 实现（您不会看到任何 TCP 跟踪）。