Golang version.Parse函數代碼示例

// maybeDeleteTerminatingPod non-gracefully deletes pods that are terminating
// that should not be gracefully terminated.
func (nc *NodeController) maybeDeleteTerminatingPod(obj interface{}) {
	pod, ok := obj.(*api.Pod)
	if !ok {
		tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
		if !ok {
			glog.Errorf("Couldn't get object from tombstone %#v", obj)
			return
		}
		pod, ok = tombstone.Obj.(*api.Pod)
		if !ok {
			glog.Errorf("Tombstone contained object that is not a Pod %#v", obj)
			return
		}
	}

	// consider only terminating pods
	if pod.DeletionTimestamp == nil {
		return
	}

	// delete terminating pods that have not yet been scheduled
	if len(pod.Spec.NodeName) == 0 {
		utilruntime.HandleError(nc.forcefullyDeletePod(pod))
		return
	}

	nodeObj, found, err := nc.nodeStore.Store.GetByKey(pod.Spec.NodeName)
	if err != nil {
		// this can only happen if the Store.KeyFunc has a problem creating
		// a key for the pod. If it happens once, it will happen again so
		// don't bother requeuing the pod.
		utilruntime.HandleError(err)
		return
	}

	// delete terminating pods that have been scheduled on
	// nonexistent nodes
	if !found {
		glog.Warningf("Unable to find Node: %v, deleting all assigned Pods.", pod.Spec.NodeName)
		utilruntime.HandleError(nc.forcefullyDeletePod(pod))
		return
	}

	// delete terminating pods that have been scheduled on
	// nodes that do not support graceful termination
	// TODO(mikedanese): this can be removed when we no longer
	// guarantee backwards compatibility of master API to kubelets with
	// versions less than 1.1.0
	node := nodeObj.(*api.Node)
	v, err := version.Parse(node.Status.NodeInfo.KubeletVersion)
	if err != nil {
		glog.V(0).Infof("couldn't parse verions %q of minion: %v", node.Status.NodeInfo.KubeletVersion, err)
		utilruntime.HandleError(nc.forcefullyDeletePod(pod))
		return
	}
	if gracefulDeletionVersion.GT(v) {
		utilruntime.HandleError(nc.forcefullyDeletePod(pod))
		return
	}
}

func summarySupported(kubeletVersion string) bool {
	semver, err := version.Parse(kubeletVersion)
	if err != nil {
		glog.Errorf("Unable to parse kubelet version: %q", kubeletVersion)
		return false
	}
	return semver.GE(minSummaryKubeletVersion)
}

// nodeRunningOutdatedKubelet returns true if the kubeletVersion reported
// in the nodeInfo of the given node is "outdated", meaning < 1.2.0.
// Older versions were inflexible and modifying pod.Status directly through
// the apiserver would result in unexpected outcomes.
func nodeRunningOutdatedKubelet(node *api.Node) bool {
	v, err := version.Parse(node.Status.NodeInfo.KubeletVersion)
	if err != nil {
		glog.Errorf("couldn't parse version %q of node %v", node.Status.NodeInfo.KubeletVersion, err)
		return true
	}
	if podStatusReconciliationVersion.GT(v) {
		glog.Infof("Node %v running kubelet at (%v) which is less than the minimum version that allows nodecontroller to mark pods NotReady (%v).", node.Name, v, podStatusReconciliationVersion)
		return true
	}
	return false
}

// maybeDeleteTerminatingPod non-gracefully deletes pods that are terminating
// that should not be gracefully terminated.
func (nc *NodeController) maybeDeleteTerminatingPod(obj interface{}) {
	pod, ok := obj.(*api.Pod)
	if !ok {
		return
	}

	// consider only terminating pods
	if pod.DeletionTimestamp == nil {
		return
	}

	// delete terminating pods that have not yet been scheduled
	if len(pod.Spec.NodeName) == 0 {
		nc.forcefullyDeletePod(pod)
		return
	}

	nodeObj, found, err := nc.nodeStore.GetByKey(pod.Spec.NodeName)
	if err != nil {
		// this can only happen if the Store.KeyFunc has a problem creating
		// a key for the pod. If it happens once, it will happen again so
		// don't bother requeuing the pod.
		utilruntime.HandleError(err)
		return
	}

	// delete terminating pods that have been scheduled on
	// nonexistant nodes
	if !found {
		nc.forcefullyDeletePod(pod)
		return
	}

	// delete terminating pods that have been scheduled on
	// nodes that do not support graceful termination
	// TODO(mikedanese): this can be removed when we no longer
	// guarantee backwards compatibility of master API to kubelets with
	// versions less than 1.1.0
	node := nodeObj.(*api.Node)
	v, err := version.Parse(node.Status.NodeInfo.KubeletVersion)
	if err != nil {
		glog.Infof("couldn't parse verions %q of minion: %v", node.Status.NodeInfo.KubeletVersion, err)
		nc.forcefullyDeletePod(pod)
		return
	}
	if gracefulDeletionVersion.GT(v) {
		nc.forcefullyDeletePod(pod)
		return
	}
}

// TODO: remove this function after 1.6
// returns if the user agent is is kubectl older than v1.4.0
func isOldKubectl(userAgent string) bool {
	// example userAgent string: kubectl-1.3/v1.3.8 (linux/amd64) kubernetes/e328d5b
	if !strings.Contains(userAgent, "kubectl") {
		return false
	}
	userAgent = strings.Split(userAgent, " ")[0]
	subs := strings.Split(userAgent, "/")
	if len(subs) != 2 {
		return false
	}
	kubectlVersion, versionErr := version.Parse(subs[1])
	if versionErr != nil {
		return false
	}
	return kubectlVersion.LT(version.MustParse("v1.4.0"))
}