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node_options.go
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node_options.go
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package node
import (
"errors"
"fmt"
"io"
"reflect"
"strings"
"github.com/spf13/cobra"
"k8s.io/apimachinery/pkg/api/meta"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
kerrors "k8s.io/apimachinery/pkg/util/errors"
"k8s.io/apimachinery/pkg/util/sets"
kapi "k8s.io/kubernetes/pkg/api"
externalclientset "k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
kclientset "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
"k8s.io/kubernetes/pkg/kubectl/resource"
kprinters "k8s.io/kubernetes/pkg/printers"
"github.com/openshift/origin/pkg/cmd/util/clientcmd"
)
type NodeOptions struct {
DefaultNamespace string
ExternalKubeClient externalclientset.Interface
KubeClient kclientset.Interface
Writer io.Writer
ErrWriter io.Writer
Mapper meta.RESTMapper
Typer runtime.ObjectTyper
CategoryExpander resource.CategoryExpander
RESTClientFactory func(mapping *meta.RESTMapping) (resource.RESTClient, error)
Printer func(mapping *meta.RESTMapping, printOptions kprinters.PrintOptions) (kprinters.ResourcePrinter, error)
CmdPrinter kprinters.ResourcePrinter
CmdPrinterOutput bool
Builder *resource.Builder
NodeNames []string
// Common optional params
Selector string
PodSelector string
}
func (n *NodeOptions) Complete(f *clientcmd.Factory, c *cobra.Command, args []string, out, errout io.Writer) error {
defaultNamespace, _, err := f.DefaultNamespace()
if err != nil {
return err
}
kc, err := f.ClientSet()
if err != nil {
return err
}
config, err := f.ClientConfig()
if err != nil {
return err
}
externalkc, err := externalclientset.NewForConfig(config)
if err != nil {
return err
}
cmdPrinter, err := f.PrinterForCommand(c, false, nil, kprinters.PrintOptions{})
if err != nil {
return err
}
mapper, typer := f.Object()
n.Builder = f.NewBuilder(true)
n.DefaultNamespace = defaultNamespace
n.ExternalKubeClient = externalkc
n.KubeClient = kc
n.Writer = out
n.ErrWriter = errout
n.Mapper = mapper
n.Typer = typer
n.CategoryExpander = f.CategoryExpander()
n.RESTClientFactory = f.ClientForMapping
n.NodeNames = []string{}
n.CmdPrinter = cmdPrinter
n.CmdPrinterOutput = false
n.Printer = func(mapping *meta.RESTMapping, printOptions kprinters.PrintOptions) (kprinters.ResourcePrinter, error) {
return f.PrinterForMapping(c, false, nil, mapping, printOptions.WithNamespace)
}
if cmdPrinter.IsGeneric() {
n.CmdPrinterOutput = true
}
if len(args) != 0 {
n.NodeNames = append(n.NodeNames, args...)
}
return nil
}
func (n *NodeOptions) Validate(checkNodeSelector bool) error {
errList := []error{}
if checkNodeSelector {
if len(n.Selector) > 0 {
if _, err := labels.Parse(n.Selector); err != nil {
errList = append(errList, errors.New("--selector=<node_selector> must be a valid label selector"))
}
}
if len(n.NodeNames) != 0 {
errList = append(errList, errors.New("either specify --selector=<node_selector> or nodes but not both"))
}
} else if len(n.NodeNames) == 0 {
errList = append(errList, errors.New("must provide --selector=<node_selector> or nodes"))
}
if len(n.PodSelector) > 0 {
if _, err := labels.Parse(n.PodSelector); err != nil {
errList = append(errList, errors.New("--pod-selector=<pod_selector> must be a valid label selector"))
}
}
return kerrors.NewAggregate(errList)
}
func (n *NodeOptions) GetNodes() ([]*kapi.Node, error) {
nameArgs := []string{"nodes"}
if len(n.NodeNames) != 0 {
nameArgs = append(nameArgs, n.NodeNames...)
}
r := n.Builder.
ContinueOnError().
NamespaceParam(n.DefaultNamespace).
SelectorParam(n.Selector).
ResourceTypeOrNameArgs(true, nameArgs...).
Flatten().
Do()
if r.Err() != nil {
return nil, r.Err()
}
errList := []error{}
nodeList := []*kapi.Node{}
_ = r.Visit(func(info *resource.Info, err error) error {
if err != nil {
return err
}
node, ok := info.Object.(*kapi.Node)
if !ok {
err = fmt.Errorf("cannot convert input to Node: %v", reflect.TypeOf(info.Object))
errList = append(errList, err)
// Don't bail out if one node fails
return nil
}
nodeList = append(nodeList, node)
return nil
})
if len(errList) != 0 {
return nodeList, kerrors.NewAggregate(errList)
}
if len(nodeList) == 0 {
return nodeList, fmt.Errorf("No nodes found")
} else {
givenNodeNames := sets.NewString(n.NodeNames...)
foundNodeNames := sets.String{}
for _, node := range nodeList {
foundNodeNames.Insert(node.ObjectMeta.Name)
}
skippedNodeNames := givenNodeNames.Difference(foundNodeNames)
if skippedNodeNames.Len() > 0 {
return nodeList, fmt.Errorf("Nodes %v not found", strings.Join(skippedNodeNames.List(), ", "))
}
}
return nodeList, nil
}
func (n *NodeOptions) GetPrintersByObject(obj runtime.Object) (kprinters.ResourcePrinter, error) {
gvk, _, err := kapi.Scheme.ObjectKinds(obj)
if err != nil {
return nil, err
}
return n.GetPrinters(gvk[0])
}
func (n *NodeOptions) GetPrintersByResource(resource schema.GroupVersionResource) (kprinters.ResourcePrinter, error) {
gvks, err := n.Mapper.KindsFor(resource)
if err != nil {
return nil, err
}
return n.GetPrinters(gvks[0])
}
func (n *NodeOptions) GetPrinters(gvk schema.GroupVersionKind) (kprinters.ResourcePrinter, error) {
mapping, err := n.Mapper.RESTMapping(gvk.GroupKind(), gvk.Version)
if err != nil {
return nil, err
}
return n.Printer(mapping, kprinters.PrintOptions{})
}
func GetPodHostFieldLabel(apiVersion string) string {
switch apiVersion {
default:
return "spec.host"
}
}