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Add liveness/readiness probe parameters

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- PeriodSeconds - How often to probe
- SuccessThreshold - Number of successful probes to go from failure to success state
- FailureThreshold - Number of failing probes to go from success to failure state

This commit includes to changes in behavior:

1. InitialDelaySeconds now defaults to 10 seconds, rather than the
kubelet sync interval (although that also defaults to 10 seconds).
2. Prober only retries on probe error, not failure. To compensate, the
default FailureThreshold is set to the maxRetries, 3.
This commit is contained in:
Tim St. Clair
2015-11-05 15:38:46 -08:00
parent fbee1b59d0
commit 1e88a682da
29 changed files with 24536 additions and 23996 deletions
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16
pkg/api/validation/validation.go
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@@ -881,12 +881,11 @@ func validateProbe(probe *api.Probe) errs.ValidationErrorList {
return allErrs
}
allErrs = append(allErrs, validateHandler(&probe.Handler)...)
if probe.InitialDelaySeconds < 0 {
allErrs = append(allErrs, errs.NewFieldInvalid("initialDelay", probe.InitialDelaySeconds, "may not be less than zero"))
}
if probe.TimeoutSeconds < 0 {
allErrs = append(allErrs, errs.NewFieldInvalid("timeout", probe.TimeoutSeconds, "may not be less than zero"))
}
allErrs = append(allErrs, ValidatePositiveField(probe.InitialDelaySeconds, "initialDelaySeconds")...)
allErrs = append(allErrs, ValidatePositiveField(probe.TimeoutSeconds, "timeoutSeconds")...)
allErrs = append(allErrs, ValidatePositiveField(int64(probe.PeriodSeconds), "periodSeconds")...)
allErrs = append(allErrs, ValidatePositiveField(int64(probe.SuccessThreshold), "successThreshold")...)
allErrs = append(allErrs, ValidatePositiveField(int64(probe.FailureThreshold), "failureThreshold")...)
return allErrs
}
@@ -1030,6 +1029,11 @@ func validateContainers(containers []api.Container, volumes sets.String) errs.Va
cErrs = append(cErrs, validateLifecycle(ctr.Lifecycle).Prefix("lifecycle")...)
}
cErrs = append(cErrs, validateProbe(ctr.LivenessProbe).Prefix("livenessProbe")...)
// Liveness-specific validation
if ctr.LivenessProbe != nil && ctr.LivenessProbe.SuccessThreshold != 1 {
allErrs = append(allErrs, errs.NewFieldForbidden("livenessProbe.successThreshold", "must be 1"))
}
cErrs = append(cErrs, validateProbe(ctr.ReadinessProbe).Prefix("readinessProbe")...)
cErrs = append(cErrs, validatePorts(ctr.Ports).Prefix("ports")...)
cErrs = append(cErrs, validateEnv(ctr.Env).Prefix("env")...)