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apiserver: refactor - move AuditBackend.Run out of NonBlockingRun
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@ -191,7 +191,7 @@ type GenericAPIServer struct {
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livezGracePeriod time.Duration
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livezClock clock.Clock
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// auditing. The backend is started after the server starts listening.
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// auditing. The backend is started before the server starts listening.
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AuditBackend audit.Backend
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// Authorizer determines whether a user is allowed to make a certain request. The Handler does a preliminary
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@ -512,10 +512,20 @@ func (s preparedGenericAPIServer) Run(stopCh <-chan struct{}) error {
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<-preShutdownHooksHasStoppedCh
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}()
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// Start the audit backend before any request comes in. This means we must call Backend.Run
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// before http server start serving. Otherwise the Backend.ProcessEvents call might block.
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// AuditBackend.Run will stop as soon as all in-flight requests are drained.
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if s.AuditBackend != nil {
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if err := s.AuditBackend.Run(drainedCh.Signaled()); err != nil {
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return fmt.Errorf("failed to run the audit backend: %v", err)
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}
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}
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stoppedCh, listenerStoppedCh, err := s.NonBlockingRun(stopHttpServerCh, shutdownTimeout)
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if err != nil {
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return err
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}
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httpServerStoppedListeningCh := s.lifecycleSignals.HTTPServerStoppedListening
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go func() {
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<-listenerStoppedCh
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@ -561,18 +571,6 @@ func (s preparedGenericAPIServer) Run(stopCh <-chan struct{}) error {
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// returned if the secure port cannot be listened on.
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// The returned channel is closed when the (asynchronous) termination is finished.
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func (s preparedGenericAPIServer) NonBlockingRun(stopCh <-chan struct{}, shutdownTimeout time.Duration) (<-chan struct{}, <-chan struct{}, error) {
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// Use an stop channel to allow graceful shutdown without dropping audit events
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// after http server shutdown.
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auditStopCh := make(chan struct{})
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// Start the audit backend before any request comes in. This means we must call Backend.Run
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// before http server start serving. Otherwise the Backend.ProcessEvents call might block.
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if s.AuditBackend != nil {
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if err := s.AuditBackend.Run(auditStopCh); err != nil {
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return nil, nil, fmt.Errorf("failed to run the audit backend: %v", err)
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}
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}
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// Use an internal stop channel to allow cleanup of the listeners on error.
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internalStopCh := make(chan struct{})
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var stoppedCh <-chan struct{}
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@ -582,7 +580,6 @@ func (s preparedGenericAPIServer) NonBlockingRun(stopCh <-chan struct{}, shutdow
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stoppedCh, listenerStoppedCh, err = s.SecureServingInfo.Serve(s.Handler, shutdownTimeout, internalStopCh)
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if err != nil {
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close(internalStopCh)
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close(auditStopCh)
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return nil, nil, err
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}
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}
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@ -597,7 +594,6 @@ func (s preparedGenericAPIServer) NonBlockingRun(stopCh <-chan struct{}, shutdow
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<-stoppedCh
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}
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s.HandlerChainWaitGroup.Wait()
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close(auditStopCh)
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}()
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s.RunPostStartHooks(stopCh)
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