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cmd/kg: add pprof endpoints 

This commit enhances the Kilo agent internal HTTP server to include
pprof endpoints. For simplicity, this commit migrates the internal
server creation to https://github.com/metalmatze/signal/internalserver,
which allows for easy registration of common internal server
observability endpoints.

Signed-off-by: Lucas Servén Marín <lserven@gmail.com>
This commit is contained in:
Lucas Servén Marín 2022-04-22 12:03:56 +02:00
parent 826593d6ba
commit 7291a3bd71
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GPG Key ID: 586FEAF680DA74AD
1 changed files with 9 additions and 6 deletions
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15
cmd/kg/main.go
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@ -27,10 +27,10 @@ import (
"github.com/go-kit/kit/log"
"github.com/go-kit/kit/log/level"
"github.com/metalmatze/signal/internalserver"
"github.com/oklog/run"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/collectors"
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/spf13/cobra"
apiextensions "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
"k8s.io/client-go/kubernetes"
@ -251,18 +251,21 @@ func runRoot(_ *cobra.Command, _ []string) error {
var g run.Group
{
h := internalserver.NewHandler(
internalserver.WithName("Internal Kilo API"),
internalserver.WithPrometheusRegistry(registry),
internalserver.WithPProf(),
)
h.AddEndpoint("/health", "Exposes health checks", healthHandler)
h.AddEndpoint("/graph", "Exposes Kilo mesh topology graph", (&graphHandler{m, gr, &hostname, s}).ServeHTTP)
// Run the HTTP server.
mux := http.NewServeMux()
mux.HandleFunc("/health", healthHandler)
mux.Handle("/graph", &graphHandler{m, gr, &hostname, s})
mux.Handle("/metrics", promhttp.HandlerFor(registry, promhttp.HandlerOpts{}))
l, err := net.Listen("tcp", listen)
if err != nil {
return fmt.Errorf("failed to listen on %s: %v", listen, err)
}
g.Add(func() error {
if err := http.Serve(l, mux); err != nil && err != http.ErrServerClosed {
if err := http.Serve(l, h); err != nil && err != http.ErrServerClosed {
return fmt.Errorf("error: server exited unexpectedly: %v", err)
}
return nil