Ejemplo n.º 1
0
// update ready status of all pods running on given node from master
// return true if success
func (nc *NodeController) markAllPodsNotReady(nodeName string) error {
	glog.V(2).Infof("Update ready status of pods on node [%v]", nodeName)
	opts := api.ListOptions{FieldSelector: fields.OneTermEqualSelector(api.PodHostField, nodeName)}
	pods, err := nc.kubeClient.Core().Pods(api.NamespaceAll).List(opts)
	if err != nil {
		return err
	}

	errMsg := []string{}
	for _, pod := range pods.Items {
		// Defensive check, also needed for tests.
		if pod.Spec.NodeName != nodeName {
			continue
		}

		for i, cond := range pod.Status.Conditions {
			if cond.Type == api.PodReady {
				pod.Status.Conditions[i].Status = api.ConditionFalse
				glog.V(2).Infof("Updating ready status of pod %v to false", pod.Name)
				_, err := nc.kubeClient.Core().Pods(pod.Namespace).UpdateStatus(&pod)
				if err != nil {
					glog.Warningf("Failed to update status for pod %q: %v", format.Pod(&pod), err)
					errMsg = append(errMsg, fmt.Sprintf("%v", err))
				}
				break
			}
		}
	}
	if len(errMsg) == 0 {
		return nil
	}
	return fmt.Errorf("%v", strings.Join(errMsg, "; "))
}
Ejemplo n.º 2
0
// terminatePods will ensure all pods on the given node that are in terminating state are eventually
// cleaned up. Returns true if the node has no pods in terminating state, a duration that indicates how
// long before we should check again (the next deadline for a pod to complete), or an error.
func (nc *NodeController) terminatePods(nodeName string, since time.Time) (bool, time.Duration, error) {
	// the time before we should try again
	nextAttempt := time.Duration(0)
	// have we deleted all pods
	complete := true

	selector := fields.OneTermEqualSelector(api.PodHostField, nodeName)
	options := api.ListOptions{FieldSelector: selector}
	pods, err := nc.kubeClient.Core().Pods(api.NamespaceAll).List(options)
	if err != nil {
		return false, nextAttempt, err
	}

	now := time.Now()
	elapsed := now.Sub(since)
	for _, pod := range pods.Items {
		// Defensive check, also needed for tests.
		if pod.Spec.NodeName != nodeName {
			continue
		}
		// only clean terminated pods
		if pod.DeletionGracePeriodSeconds == nil {
			continue
		}

		// the user's requested grace period
		grace := time.Duration(*pod.DeletionGracePeriodSeconds) * time.Second
		if grace > nc.maximumGracePeriod {
			grace = nc.maximumGracePeriod
		}

		// the time remaining before the pod should have been deleted
		remaining := grace - elapsed
		if remaining < 0 {
			remaining = 0
			glog.V(2).Infof("Removing pod %v after %s grace period", pod.Name, grace)
			nc.recordNodeEvent(nodeName, api.EventTypeNormal, "TerminatingEvictedPod", fmt.Sprintf("Pod %s has exceeded the grace period for deletion after being evicted from Node %q and is being force killed", pod.Name, nodeName))
			if err := nc.kubeClient.Core().Pods(pod.Namespace).Delete(pod.Name, api.NewDeleteOptions(0)); err != nil {
				glog.Errorf("Error completing deletion of pod %s: %v", pod.Name, err)
				complete = false
			}
		} else {
			glog.V(2).Infof("Pod %v still terminating, requested grace period %s, %s remaining", pod.Name, grace, remaining)
			complete = false
		}

		if nextAttempt < remaining {
			nextAttempt = remaining
		}
	}
	return complete, nextAttempt, nil
}
Ejemplo n.º 3
0
// forcefullyDeleteNode immediately deletes all pods on the node, and then
// deletes the node itself.
func (nc *NodeController) forcefullyDeleteNode(nodeName string) error {
	selector := fields.OneTermEqualSelector(api.PodHostField, nodeName)
	options := api.ListOptions{FieldSelector: selector}
	pods, err := nc.kubeClient.Core().Pods(api.NamespaceAll).List(options)
	if err != nil {
		return fmt.Errorf("unable to list pods on node %q: %v", nodeName, err)
	}
	for _, pod := range pods.Items {
		if pod.Spec.NodeName != nodeName {
			continue
		}
		if err := nc.forcefullyDeletePod(&pod); err != nil {
			return fmt.Errorf("unable to delete pod %q on node %q: %v", pod.Name, nodeName, err)
		}
	}
	if err := nc.kubeClient.Core().Nodes().Delete(nodeName, nil); err != nil {
		return fmt.Errorf("unable to delete node %q: %v", nodeName, err)
	}
	return nil
}
Ejemplo n.º 4
0
// deletePods will delete all pods from master running on given node, and return true
// if any pods were deleted.
func (nc *NodeController) deletePods(nodeName string) (bool, error) {
	remaining := false
	selector := fields.OneTermEqualSelector(api.PodHostField, nodeName)
	options := api.ListOptions{FieldSelector: selector}
	pods, err := nc.kubeClient.Core().Pods(api.NamespaceAll).List(options)
	if err != nil {
		return remaining, err
	}

	if len(pods.Items) > 0 {
		nc.recordNodeEvent(nodeName, api.EventTypeNormal, "DeletingAllPods", fmt.Sprintf("Deleting all Pods from Node %v.", nodeName))
	}

	for _, pod := range pods.Items {
		// Defensive check, also needed for tests.
		if pod.Spec.NodeName != nodeName {
			continue
		}
		// if the pod has already been deleted, ignore it
		if pod.DeletionGracePeriodSeconds != nil {
			continue
		}
		// if the pod is managed by a daemonset, ignore it
		_, err := nc.daemonSetStore.GetPodDaemonSets(&pod)
		if err == nil { // No error means at least one daemonset was found
			continue
		}

		glog.V(2).Infof("Starting deletion of pod %v", pod.Name)
		nc.recorder.Eventf(&pod, api.EventTypeNormal, "NodeControllerEviction", "Marking for deletion Pod %s from Node %s", pod.Name, nodeName)
		if err := nc.kubeClient.Core().Pods(pod.Namespace).Delete(pod.Name, nil); err != nil {
			return false, err
		}
		remaining = true
	}
	return remaining, nil
}
Ejemplo n.º 5
0
// SingleObject returns a ListOptions for watching a single object.
func SingleObject(meta ObjectMeta) ListOptions {
	return ListOptions{
		FieldSelector:   fields.OneTermEqualSelector("metadata.name", meta.Name),
		ResourceVersion: meta.ResourceVersion,
	}
}
Ejemplo n.º 6
0
// ListResource returns a function that handles retrieving a list of resources from a rest.Storage object.
func ListResource(r rest.Lister, rw rest.Watcher, scope RequestScope, forceWatch bool, minRequestTimeout time.Duration) restful.RouteFunction {
	return func(req *restful.Request, res *restful.Response) {
		// For performance tracking purposes.
		trace := util.NewTrace("List " + req.Request.URL.Path)

		w := res.ResponseWriter

		namespace, err := scope.Namer.Namespace(req)
		if err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}

		// Watches for single objects are routed to this function.
		// Treat a /name parameter the same as a field selector entry.
		hasName := true
		_, name, err := scope.Namer.Name(req)
		if err != nil {
			hasName = false
		}

		ctx := scope.ContextFunc(req)
		ctx = api.WithNamespace(ctx, namespace)

		opts := api.ListOptions{}
		if err := scope.ParameterCodec.DecodeParameters(req.Request.URL.Query(), scope.Kind.GroupVersion(), &opts); err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}

		// transform fields
		// TODO: DecodeParametersInto should do this.
		if opts.FieldSelector != nil {
			fn := func(label, value string) (newLabel, newValue string, err error) {
				return scope.Convertor.ConvertFieldLabel(scope.Kind.GroupVersion().String(), scope.Kind.Kind, label, value)
			}
			if opts.FieldSelector, err = opts.FieldSelector.Transform(fn); err != nil {
				// TODO: allow bad request to set field causes based on query parameters
				err = errors.NewBadRequest(err.Error())
				scope.err(err, res.ResponseWriter, req.Request)
				return
			}
		}

		if hasName {
			// metadata.name is the canonical internal name.
			// generic.SelectionPredicate will notice that this is
			// a request for a single object and optimize the
			// storage query accordingly.
			nameSelector := fields.OneTermEqualSelector("metadata.name", name)
			if opts.FieldSelector != nil && !opts.FieldSelector.Empty() {
				// It doesn't make sense to ask for both a name
				// and a field selector, since just the name is
				// sufficient to narrow down the request to a
				// single object.
				scope.err(errors.NewBadRequest("both a name and a field selector provided; please provide one or the other."), res.ResponseWriter, req.Request)
				return
			}
			opts.FieldSelector = nameSelector
		}

		if (opts.Watch || forceWatch) && rw != nil {
			watcher, err := rw.Watch(ctx, &opts)
			if err != nil {
				scope.err(err, res.ResponseWriter, req.Request)
				return
			}
			// TODO: Currently we explicitly ignore ?timeout= and use only ?timeoutSeconds=.
			timeout := time.Duration(0)
			if opts.TimeoutSeconds != nil {
				timeout = time.Duration(*opts.TimeoutSeconds) * time.Second
			}
			if timeout == 0 && minRequestTimeout > 0 {
				timeout = time.Duration(float64(minRequestTimeout) * (rand.Float64() + 1.0))
			}
			serveWatch(watcher, scope, req, res, timeout)
			return
		}

		// Log only long List requests (ignore Watch).
		defer trace.LogIfLong(500 * time.Millisecond)
		trace.Step("About to List from storage")
		result, err := r.List(ctx, &opts)
		if err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}
		trace.Step("Listing from storage done")
		numberOfItems, err := setListSelfLink(result, req, scope.Namer)
		if err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}
		trace.Step("Self-linking done")
		write(http.StatusOK, scope.Kind.GroupVersion(), scope.Serializer, result, w, req.Request)
		trace.Step(fmt.Sprintf("Writing http response done (%d items)", numberOfItems))
	}
}