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Allow adding healthz and livez checks independent to each other

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This commit is contained in:
Marek Siarkowicz 2021-02-13 17:29:34 +01:00
parent 7f083d339f
commit 67f3204b40
2 changed files with 11 additions and 9 deletions
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2
staging/src/k8s.io/apiserver/pkg/server/config.go
View File

@ -633,7 +633,7 @@ func (c completedConfig) New(name string, delegationTarget DelegationTarget) (*G
}
}
// TODO: Once we get rid of /healthz consider changing this to post-start-hook.
err := s.addReadyzChecks(healthz.NewInformerSyncHealthz(c.SharedInformerFactory))
err := s.AddReadyzChecks(healthz.NewInformerSyncHealthz(c.SharedInformerFactory))
if err != nil {
return nil, err
}

18
staging/src/k8s.io/apiserver/pkg/server/healthz.go
View File

@ -53,11 +53,14 @@ func (s *GenericAPIServer) addHealthChecks(livezGracePeriod time.Duration, check
return fmt.Errorf("unable to add because the healthz endpoint has already been created")
}
s.healthzChecks = append(s.healthzChecks, checks...)
return s.addLivezChecks(livezGracePeriod, checks...)
if err := s.AddLivezChecks(livezGracePeriod, checks...); err != nil {
return err
}
return s.AddReadyzChecks(checks...)
}
// addReadyzChecks allows you to add a HealthCheck to readyz.
func (s *GenericAPIServer) addReadyzChecks(checks ...healthz.HealthChecker) error {
// AddReadyzChecks allows you to add a HealthCheck to readyz.
func (s *GenericAPIServer) AddReadyzChecks(checks ...healthz.HealthChecker) error {
s.readyzLock.Lock()
defer s.readyzLock.Unlock()
if s.readyzChecksInstalled {
@ -67,9 +70,8 @@ func (s *GenericAPIServer) addReadyzChecks(checks ...healthz.HealthChecker) erro
return nil
}
// addLivezChecks allows you to add a HealthCheck to livez. It will also automatically add a check to readyz,
// since we want to avoid being ready when we are not live.
func (s *GenericAPIServer) addLivezChecks(delay time.Duration, checks ...healthz.HealthChecker) error {
// AddLivezChecks allows you to add a HealthCheck to livez.
func (s *GenericAPIServer) AddLivezChecks(delay time.Duration, checks ...healthz.HealthChecker) error {
s.livezLock.Lock()
defer s.livezLock.Unlock()
if s.livezChecksInstalled {
@ -78,14 +80,14 @@ func (s *GenericAPIServer) addLivezChecks(delay time.Duration, checks ...healthz
for _, check := range checks {
s.livezChecks = append(s.livezChecks, delayedHealthCheck(check, s.livezClock, delay))
}
return s.addReadyzChecks(checks...)
return nil
}
// addReadyzShutdownCheck is a convenience function for adding a readyz shutdown check, so
// that we can register that the api-server is no longer ready while we attempt to gracefully
// shutdown.
func (s *GenericAPIServer) addReadyzShutdownCheck(stopCh <-chan struct{}) error {
return s.addReadyzChecks(shutdownCheck{stopCh})
return s.AddReadyzChecks(shutdownCheck{stopCh})
}
// installHealthz creates the healthz endpoint for this server