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role.go
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role.go
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package debug
import (
"context"
"errors"
"fmt"
"net/http"
"net/http/pprof"
"runtime"
"github.com/felixge/fgprof"
"beryju.io/gravity/pkg/extconfig"
"beryju.io/gravity/pkg/roles"
"beryju.io/gravity/pkg/roles/api"
"beryju.io/gravity/pkg/roles/debug/types"
"github.com/getsentry/sentry-go"
"github.com/gorilla/mux"
"go.uber.org/zap"
)
type Role struct {
m *mux.Router
log *zap.Logger
i roles.Instance
ctx context.Context
server *http.Server
}
func New(instance roles.Instance) *Role {
mux := mux.NewRouter()
r := &Role{
log: instance.Log(),
i: instance,
m: mux,
ctx: instance.Context(),
}
r.m.Use(api.NewRecoverMiddleware(r.log))
r.m.Use(api.NewLoggingMiddleware(r.log, nil))
r.m.HandleFunc("/", r.Index)
r.m.HandleFunc("/debug/pprof/", pprof.Index)
r.m.HandleFunc("/debug/pprof/cmdline", pprof.Cmdline)
r.m.HandleFunc("/debug/pprof/profile", pprof.Profile)
r.m.HandleFunc("/debug/pprof/symbol", pprof.Symbol)
r.m.HandleFunc("/debug/pprof/trace", pprof.Trace)
r.m.HandleFunc("/debug/pprof/{cmd}", pprof.Index)
r.m.HandleFunc("/debug/fgprof", fgprof.Handler().ServeHTTP)
r.m.HandleFunc("/debug/sentry", func(w http.ResponseWriter, r *http.Request) {
sentry.WithScope(func(scope *sentry.Scope) {
scope.SetTag("gravity.Testerror", "true")
sentry.CaptureException(errors.New("debug test error"))
})
})
return r
}
func (r *Role) Start(ctx context.Context, config []byte) error {
r.i.DispatchEvent(types.EventTopicDebugMuxSetup, roles.NewEvent(
ctx,
map[string]interface{}{
"mux": r.m,
},
))
listen := extconfig.Get().Listen(8010)
runtime.SetBlockProfileRate(5)
r.log.Info("starting debug server", zap.String("listen", listen))
r.server = &http.Server{
Addr: listen,
Handler: r.m,
}
go func() {
err := r.server.ListenAndServe()
if err != nil && err != http.ErrServerClosed {
r.log.Warn("failed to listen", zap.Error(err))
}
}()
return nil
}
func (r *Role) Stop() {
if r.server != nil {
r.server.Shutdown(r.ctx)
}
}
func (r *Role) Index(w http.ResponseWriter, re *http.Request) {
r.m.Walk(func(route *mux.Route, router *mux.Router, ancestors []*mux.Route) error {
tpl, err := route.GetPathTemplate()
if err != nil {
return nil
}
w.Write([]byte(fmt.Sprintf("<a href='%[1]s'>%[1]s</a><br>", tpl)))
return nil
})
}