Add timeouts to HealthChecks and retry checks

Fixes issue #3532. Added timeouts for HTTP and TCP checks
and enabled kubelet/probe to kubelet#maxRetries times
before declaring Failure.

Added Probe.TimeoutSecs to API

Probe variants now check container.LivenessProbe.TimeoutSeconds
Also added a test for timeouts in http_test.go.

pkg/api/types.go

@@ -279,6 +279,8 @@ type Probe struct {
 	Handler `json:",inline"`
 	// Length of time before health checking is activated.  In seconds.
 	InitialDelaySeconds int64 `json:"initialDelaySeconds,omitempty"`
+	// Length of time before health checking times out.  In seconds.
+	TimeoutSeconds int64 `json:"timeoutSeconds,omitempty"`
 }
 
 // PullPolicy describes a policy for if/when to pull a container image

pkg/api/v1beta1/conversion.go

@@ -911,6 +911,7 @@ func init() {
 				return err
 			}
 			out.InitialDelaySeconds = in.InitialDelaySeconds
+			out.TimeoutSeconds = in.TimeoutSeconds
 			return nil
 		},
 		func(in *LivenessProbe, out *newer.Probe, s conversion.Scope) error {
@@ -924,6 +925,7 @@ func init() {
 				return err
 			}
 			out.InitialDelaySeconds = in.InitialDelaySeconds
+			out.TimeoutSeconds = in.TimeoutSeconds
 			return nil
 		},
 	)

pkg/api/v1beta1/types.go

@@ -227,6 +227,8 @@ type LivenessProbe struct {
 	Exec *ExecAction `json:"exec,omitempty" description:"parameters for exec-based liveness probe"`
 	// Length of time before health checking is activated.  In seconds.
 	InitialDelaySeconds int64 `json:"initialDelaySeconds,omitempty" description:"number of seconds after the container has started before liveness probes are initiated"`
+	// Length of time before health checking times out.  In seconds.
+	TimeoutSeconds int64 `json:"timeoutSeconds,omitempty" description:"number of seconds after which liveness probes timeout; defaults to 1 second"`
 }
 
 // PullPolicy describes a policy for if/when to pull a container image

pkg/api/v1beta2/conversion.go

@@ -824,6 +824,7 @@ func init() {
 				return err
 			}
 			out.InitialDelaySeconds = in.InitialDelaySeconds
+			out.TimeoutSeconds = in.TimeoutSeconds
 			return nil
 		},
 		func(in *LivenessProbe, out *newer.Probe, s conversion.Scope) error {
@@ -837,6 +838,7 @@ func init() {
 				return err
 			}
 			out.InitialDelaySeconds = in.InitialDelaySeconds
+			out.TimeoutSeconds = in.TimeoutSeconds
 			return nil
 		},
 	)

pkg/api/v1beta2/types.go

@@ -191,6 +191,8 @@ type LivenessProbe struct {
 	Exec *ExecAction `json:"exec,omitempty" description:"parameters for exec-based liveness probe"`
 	// Length of time before health checking is activated.  In seconds.
 	InitialDelaySeconds int64 `json:"initialDelaySeconds,omitempty" description:"number of seconds after the container has started before liveness probes are initiated"`
+	// Length of time before health checking times out.  In seconds.
+	TimeoutSeconds int64 `json:"timeoutSeconds,omitempty" description:"number of seconds after which liveness probes timeout; defaults to 1 second"`
 }
 
 // PullPolicy describes a policy for if/when to pull a container image

pkg/api/v1beta3/types.go

@@ -297,6 +297,8 @@ type Probe struct {
 	Handler `json:",inline"`
 	// Length of time before health checking is activated.  In seconds.
 	InitialDelaySeconds int64 `json:"initialDelaySeconds,omitempty"`
+	// Length of time before health checking times out.  In seconds.
+	TimeoutSeconds int64 `json:"timeoutSeconds,omitempty"`
 }
 
 // PullPolicy describes a policy for if/when to pull a container image