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在 kubernetes 源代码中有一段代码可以处理分析部分，但我无法访问端点：

in kubernetes/pkgs/kubelet/server/stats/server.go

func (s *Server) InstallProfilingHandler(enableProfilingLogHandler bool, enableContentionProfiling bool) {
    s.addMetricsBucketMatcher("debug")
    if !enableProfilingLogHandler {
        s.restfulCont.Handle(pprofBasePath, getHandlerForDisabledEndpoint("profiling endpoint is disabled."))
        return
    }

    handlePprofEndpoint := func(req *restful.Request, resp *restful.Response) {
        name := strings.TrimPrefix(req.Request.URL.Path, pprofBasePath)
        switch name {
        case "profile":
            pprof.Profile(resp, req.Request)
        case "symbol":
            pprof.Symbol(resp, req.Request)
        case "cmdline":
            pprof.Cmdline(resp, req.Request)
        case "trace":
            pprof.Trace(resp, req.Request)
        default:
            pprof.Index(resp, req.Request)
        }
    }

    // Setup pprof handlers.
    ws := new(restful.WebService).Path(pprofBasePath)
    ws.Route(ws.GET("/{subpath:*}").To(handlePprofEndpoint)).Doc("pprof endpoint")
    s.restfulCont.Add(ws)

    if enableContentionProfiling {
        goruntime.SetBlockProfileRate(1)
    }
}

我不知道 pprof 工具使用的端口，但我发现它使用：

controller-0:/home/sysadmin/go/bin# netstat -atlpn | grep kubelet
tcp        0      0 127.0.0.1:10248         0.0.0.0:*               LISTEN      184856/kubelet      
tcp        0      0 192.168.206.2:49720     192.168.206.1:6443      ESTABLISHED 184856/kubelet      
tcp6       0      0 :::10250                :::*                    LISTEN      184856/kubelet

然后我试过了

controller-0:/home/sysadmin/go/bin# ./go tool pprof  http://localhost:6443/debug/pprof/mutex
Fetching profile over HTTP from http://localhost:6443/debug/pprof/mutex
http://localhost:6443/debug/pprof/mutex: server response: 400 Bad Request
failed to fetch any source profiles

有没有人知道我应该尝试什么来访问 pprof 端点？或者如何尝试不同的方法来分析 kubelet 进程？

4

1 回答 1

1

尝试：

$ kubectl proxy &
Starting to serve on 127.0.0.1:8001
$ go tool pprof "http://localhost:8001/api/v1/nodes/${NODE}/proxy/debug/pprof/profile"

当你启动时kubectl proxy，所有的请求都http://localhost:8001/api/v1/nodes/${NODE}/proxy/去运行在 kubelet 上${NODE}。您可以添加任何您想要的路径和它。让它成为/debug/pprof/profile或debug/pprof/heap任何你想要的。

于 2021-06-11T13:29:49.637 回答