mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-18 12:20:24 +00:00
5af3fe5deb
this commits add the controller runtime and its dependency to the vendor. Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
70 lines
2.3 KiB
Go
70 lines
2.3 KiB
Go
/*
|
|
Copyright 2015 The Kubernetes Authors.
|
|
|
|
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 leaderelection
|
|
|
|
import (
|
|
"net/http"
|
|
"sync"
|
|
"time"
|
|
)
|
|
|
|
// HealthzAdaptor associates the /healthz endpoint with the LeaderElection object.
|
|
// It helps deal with the /healthz endpoint being set up prior to the LeaderElection.
|
|
// This contains the code needed to act as an adaptor between the leader
|
|
// election code the health check code. It allows us to provide health
|
|
// status about the leader election. Most specifically about if the leader
|
|
// has failed to renew without exiting the process. In that case we should
|
|
// report not healthy and rely on the kubelet to take down the process.
|
|
type HealthzAdaptor struct {
|
|
pointerLock sync.Mutex
|
|
le *LeaderElector
|
|
timeout time.Duration
|
|
}
|
|
|
|
// Name returns the name of the health check we are implementing.
|
|
func (l *HealthzAdaptor) Name() string {
|
|
return "leaderElection"
|
|
}
|
|
|
|
// Check is called by the healthz endpoint handler.
|
|
// It fails (returns an error) if we own the lease but had not been able to renew it.
|
|
func (l *HealthzAdaptor) Check(req *http.Request) error {
|
|
l.pointerLock.Lock()
|
|
defer l.pointerLock.Unlock()
|
|
if l.le == nil {
|
|
return nil
|
|
}
|
|
return l.le.Check(l.timeout)
|
|
}
|
|
|
|
// SetLeaderElection ties a leader election object to a HealthzAdaptor
|
|
func (l *HealthzAdaptor) SetLeaderElection(le *LeaderElector) {
|
|
l.pointerLock.Lock()
|
|
defer l.pointerLock.Unlock()
|
|
l.le = le
|
|
}
|
|
|
|
// NewLeaderHealthzAdaptor creates a basic healthz adaptor to monitor a leader election.
|
|
// timeout determines the time beyond the lease expiry to be allowed for timeout.
|
|
// checks within the timeout period after the lease expires will still return healthy.
|
|
func NewLeaderHealthzAdaptor(timeout time.Duration) *HealthzAdaptor {
|
|
result := &HealthzAdaptor{
|
|
timeout: timeout,
|
|
}
|
|
return result
|
|
}
|