forked from Stackdriver/heapster
/
handler.go
47 lines (41 loc) · 1.26 KB
/
handler.go
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// Copyright 2017 Google Inc. All Rights Reserved.
//
// 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 api
import (
"errors"
"fmt"
"net/http"
"time"
"github.com/golang/glog"
"k8s.io/apiserver/pkg/server/healthz"
"k8s.io/heapster/events/manager"
)
const (
// MaxEventsScrapeDelay should be larger than `frequency` command line argument.
MaxEventsScrapeDelay = 3 * time.Minute
)
func healthzChecker() healthz.HealthzChecker {
return healthz.NamedCheck("healthz", func(r *http.Request) error {
if time.Since(manager.LatestScrapeTime) > MaxEventsScrapeDelay {
msg := fmt.Sprintf(
"No event batch within %s (latest: %s)",
MaxEventsScrapeDelay,
manager.LatestScrapeTime,
)
glog.Warning(msg)
return errors.New(msg)
}
return nil
})
}