Skip to content
Permalink
Branch: master
Find file Copy path
Find file Copy path
Fetching contributors…
Cannot retrieve contributors at this time
123 lines (92 sloc) 2.75 KB
// Copyright 2019 Aporeto Inc.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package bahamut
import (
"context"
"net/http"
"strings"
"time"
"go.uber.org/zap"
)
// an healthServer is the structure serving the health check endpoint.
type healthServer struct {
cfg config
server *http.Server
}
// newHealthServer returns a new healthServer.
func newHealthServer(cfg config) *healthServer {
s := &healthServer{
cfg: cfg,
server: &http.Server{Addr: cfg.healthServer.listenAddress},
}
s.server.Handler = s
return s
}
func (s *healthServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if r.Method != http.MethodGet {
http.Error(w, "Method Not Allowed", http.StatusMethodNotAllowed)
return
}
switch r.URL.Path {
case "/":
if s.cfg.healthServer.healthHandler == nil {
w.WriteHeader(http.StatusNoContent)
return
}
if err := s.cfg.healthServer.healthHandler(); err != nil {
w.WriteHeader(http.StatusInternalServerError)
return
}
w.WriteHeader(http.StatusNoContent)
case "/metrics":
if s.cfg.healthServer.metricsManager == nil {
w.WriteHeader(http.StatusNotImplemented)
return
}
s.cfg.healthServer.metricsManager.Write(w, r)
default:
if s.cfg.healthServer.customStats == nil {
http.Error(w, "Not Found", http.StatusNotFound)
return
}
f := s.cfg.healthServer.customStats[strings.TrimPrefix(r.URL.Path, "/")]
if f == nil {
http.Error(w, "Not Found", http.StatusNotFound)
return
}
f(w, r)
}
}
func (s *healthServer) start(ctx context.Context) {
zap.L().Debug("Health server enabled", zap.String("listen", s.cfg.healthServer.listenAddress))
go func() {
if err := s.server.ListenAndServe(); err != nil {
if err == http.ErrServerClosed {
return
}
zap.L().Fatal("Unable to start health server", zap.Error(err))
}
}()
zap.L().Info("Health server started", zap.String("address", s.cfg.healthServer.listenAddress))
<-ctx.Done()
}
func (s *healthServer) stop() context.Context {
ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
go func() {
defer cancel()
if err := s.server.Shutdown(ctx); err != nil {
zap.L().Error("Could not gracefully stop health server", zap.Error(err))
} else {
zap.L().Debug("Health server stopped")
}
}()
return ctx
}
You can’t perform that action at this time.