remove ignore error flag for drain, and set this feature as default

Kubernetes-commit: f54d2a0dd1dd5c143fb32dae5c627dba87d6df7e

pkg/cmd/drain/drain.go

@@ -192,7 +192,6 @@ func NewCmdDrain(f cmdutil.Factory, ioStreams genericclioptions.IOStreams) *cobr
 	}
 	cmd.Flags().BoolVar(&o.drainer.Force, "force", o.drainer.Force, "Continue even if there are pods not managed by a ReplicationController, ReplicaSet, Job, DaemonSet or StatefulSet.")
 	cmd.Flags().BoolVar(&o.drainer.IgnoreAllDaemonSets, "ignore-daemonsets", o.drainer.IgnoreAllDaemonSets, "Ignore DaemonSet-managed pods.")
-	cmd.Flags().BoolVar(&o.drainer.IgnoreErrors, "ignore-errors", o.drainer.IgnoreErrors, "Ignore errors occurred between drain nodes in group.")
 	cmd.Flags().BoolVar(&o.drainer.DeleteEmptyDirData, "delete-local-data", o.drainer.DeleteEmptyDirData, "Continue even if there are pods using emptyDir (local data that will be deleted when the node is drained).")
 	cmd.Flags().MarkDeprecated("delete-local-data", "This option is deprecated and will be deleted. Use --delete-emptydir-data.")
 	cmd.Flags().BoolVar(&o.drainer.DeleteEmptyDirData, "delete-emptydir-data", o.drainer.DeleteEmptyDirData, "Continue even if there are pods using emptyDir (local data that will be deleted when the node is drained).")
@@ -298,8 +297,9 @@ func (o *DrainCmdOptions) RunDrain() error {
 	}
 
 	drainedNodes := sets.NewString()
-	var fatal error
+	var fatal []error
 
+	remainingNodes := []string{}
 	for _, info := range o.nodeInfos {
 		if err := o.deleteOrEvictPodsSimple(info); err == nil {
 			drainedNodes.Insert(info.Name)
@@ -311,34 +311,25 @@ func (o *DrainCmdOptions) RunDrain() error {
 
 			printObj(info.Object, o.Out)
 		} else {
-			if o.drainer.IgnoreErrors && len(o.nodeInfos) > 1 {
-				fmt.Fprintf(o.ErrOut, "error: unable to drain node %q due to error:%s, continuing command...\n", info.Name, err)
-				continue
-			}
-			fmt.Fprintf(o.ErrOut, "DEPRECATED WARNING: Aborting the drain command in a list of nodes will be deprecated in v1.23.\n"+
-				"The new behavior will make the drain command go through all nodes even if one or more nodes failed during the drain.\n"+
-				"For now, users can try such experience via: --ignore-errors\n")
-			fmt.Fprintf(o.ErrOut, "error: unable to drain node %q, aborting command...\n\n", info.Name)
-			remainingNodes := []string{}
-			fatal = err
-			for _, remainingInfo := range o.nodeInfos {
-				if drainedNodes.Has(remainingInfo.Name) {
-					continue
-				}
-				remainingNodes = append(remainingNodes, remainingInfo.Name)
+			fmt.Fprintf(o.ErrOut, "error: unable to drain node %q due to error:%s, continuing command...\n", info.Name, err)
+
+			if !drainedNodes.Has(info.Name) {
+				fatal = append(fatal, err)
+				remainingNodes = append(remainingNodes, info.Name)
 			}
 
-			if len(remainingNodes) > 0 {
-				fmt.Fprintf(o.ErrOut, "There are pending nodes to be drained:\n")
-				for _, nodeName := range remainingNodes {
-					fmt.Fprintf(o.ErrOut, " %s\n", nodeName)
-				}
+			continue
+		}
+
+		if len(remainingNodes) > 0 {
+			fmt.Fprintf(o.ErrOut, "There are pending nodes to be drained:\n")
+			for _, nodeName := range remainingNodes {
+				fmt.Fprintf(o.ErrOut, " %s\n", nodeName)
 			}
-			break
 		}
 	}
 
-	return fatal
+	return utilerrors.NewAggregate(fatal)
 }
 
 func (o *DrainCmdOptions) deleteOrEvictPodsSimple(nodeInfo *resource.Info) error {

pkg/drain/drain.go

@@ -59,7 +59,6 @@ type Helper struct {
 	GracePeriodSeconds int
 
 	IgnoreAllDaemonSets bool
-	IgnoreErrors        bool
 	Timeout             time.Duration
 	DeleteEmptyDirData  bool
 	Selector            string