如何在与kubernetes和golang一起使用delve调试器时显示应用程序的原始日志？

Question

我正在使用Kubernetes和helm图表在系统中部署一些微服务应用程序。其他服务将使用Netcat来等待waiter-service的运行，但是这个waiter-service服务在由delve启动时似乎不能正常工作，所以我想检查它的日志。

dockerfile的入口点如下所示：

/dlv --listen=:40000 --log --log-output=rpc --allow-non-terminal-interactive=true 
--api-version=2 exec /server -- appname --config=configfile.yaml

我收到的日志如下：

2022-08-24T13:22:11Z debug layer=rpc serving JSON-RPC on new connection
2022-08-24T13:22:11Z debug layer=rpc <- RPCServer.SetApiVersion(api.SetAPIVersionIn{"APIVersion":2})
2022-08-24T13:22:11Z debug layer=rpc -> *api.SetAPIVersionOut{} error: ""
2022-08-24T13:22:11Z debug layer=rpc <- RPCServer.IsMulticlient(rpc2.IsMulticlientIn{})
2022-08-24T13:22:11Z debug layer=rpc -> *rpc2.IsMulticlientOut{"IsMulticlient":false} error: ""
2022-08-24T13:22:11Z debug layer=rpc (async 3) <- RPCServer.State(rpc2.StateIn{"NonBlocking":true})
2022-08-24T13:22:11Z debug layer=rpc (async 3) -> rpc2.StateOut{"State":{"Pid":14,"Running":false,"Recording":false,"CoreDumping":false,"currentThread":{"id":14,"pc":4652512,"file":"/usr/lib/go-1.18/src/runtime/rt0_linux_amd64.s","line":8,"function":{"name":"_rt0_amd64_linux","value":4652512,"type":0,"goType":0,"optimized":true},"goroutineID":0,"ReturnValues":null,"CallReturn":false},"Threads":[{"id":14,"pc":4652512,"file":"/usr/lib/go-1.18/src/runtime/rt0_linux_amd64.s","line":8,"function":{"name":"_rt0_amd64_linux","value":4652512,"type":0,"goType":0,"optimized":true},"goroutineID":0,"ReturnValues":null,"CallReturn":false}],"NextInProgress":false,"WatchOutOfScope":null,"exited":false,"exitStatus":0,"When":""}} error: ""
2022-08-24T13:22:11Z debug layer=rpc <- RPCServer.Recorded(rpc2.RecordedIn{})
2022-08-24T13:22:11Z debug layer=rpc -> *rpc2.RecordedOut{"Recorded":false,"TraceDirectory":""} error: ""

但是当我用普通命令运行它时

/server appname --config=configfile.yaml

我的预期日志如下：

2022/08/24 07:43:43 maxprocs: Leaving GOMAXPROCS=16: CPU quota undefined
2022-08-24T07:43:44.976Z    INFO    database/pool.go:35 database configuration  {"MaxConns": 8, "RetryCount": 10, "RetryInterval (seconds)": 5}
2022-08-24T07:43:44.976Z    INFO    v4@v4.15.0/conn.go:355  Dialing PostgreSQL server   {"host": "postgres-infras.emulator.svc.cluster.local"}
2022-08-24T07:43:44.980Z    INFO    nats/jetstream.go:335   nats jetstream connected
2022-08-24T07:43:45.090Z    INFO    zap/grpclogger.go:92    [core][Channel #1 SubChannel #2] Subchannel Connectivity change to READY    {"system": "grpc", "grpc_log": true}

问题是，我如何读取实际日志，以了解为什么waiter-service不能工作，而其他人可以呢？

Answer 1

您可以添加以下选项：

 --continue --headless

相关问题：Go delve --continue