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resource_printer.go
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resource_printer.go
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/*
Copyright 2014 The Kubernetes Authors All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package kubectl
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"os"
"reflect"
"sort"
"strings"
"text/tabwriter"
"text/template"
"time"
"github.com/ghodss/yaml"
"github.com/golang/glog"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/meta"
"k8s.io/kubernetes/pkg/api/unversioned"
"k8s.io/kubernetes/pkg/api/v1"
"k8s.io/kubernetes/pkg/apis/extensions"
"k8s.io/kubernetes/pkg/conversion"
"k8s.io/kubernetes/pkg/labels"
"k8s.io/kubernetes/pkg/runtime"
"k8s.io/kubernetes/pkg/util/jsonpath"
"k8s.io/kubernetes/pkg/util/sets"
)
const (
tabwriterMinWidth = 10
tabwriterWidth = 4
tabwriterPadding = 3
tabwriterPadChar = ' '
tabwriterFlags = 0
)
// GetPrinter takes a format type, an optional format argument. It will return true
// if the format is generic (untyped), otherwise it will return false. The printer
// is agnostic to schema versions, so you must send arguments to PrintObj in the
// version you wish them to be shown using a VersionedPrinter (typically when
// generic is true).
func GetPrinter(format, formatArgument string) (ResourcePrinter, bool, error) {
var printer ResourcePrinter
switch format {
case "json":
printer = &JSONPrinter{}
case "yaml":
printer = &YAMLPrinter{}
case "name":
printer = &NamePrinter{}
case "template", "go-template":
if len(formatArgument) == 0 {
return nil, false, fmt.Errorf("template format specified but no template given")
}
var err error
printer, err = NewTemplatePrinter([]byte(formatArgument))
if err != nil {
return nil, false, fmt.Errorf("error parsing template %s, %v\n", formatArgument, err)
}
case "templatefile", "go-template-file":
if len(formatArgument) == 0 {
return nil, false, fmt.Errorf("templatefile format specified but no template file given")
}
data, err := ioutil.ReadFile(formatArgument)
if err != nil {
return nil, false, fmt.Errorf("error reading template %s, %v\n", formatArgument, err)
}
printer, err = NewTemplatePrinter(data)
if err != nil {
return nil, false, fmt.Errorf("error parsing template %s, %v\n", string(data), err)
}
case "jsonpath":
if len(formatArgument) == 0 {
return nil, false, fmt.Errorf("jsonpath template format specified but no template given")
}
var err error
printer, err = NewJSONPathPrinter(formatArgument)
if err != nil {
return nil, false, fmt.Errorf("error parsing jsonpath %s, %v\n", formatArgument, err)
}
case "jsonpath-file":
if len(formatArgument) == 0 {
return nil, false, fmt.Errorf("jsonpath file format specified but no template file file given")
}
data, err := ioutil.ReadFile(formatArgument)
if err != nil {
return nil, false, fmt.Errorf("error reading template %s, %v\n", formatArgument, err)
}
printer, err = NewJSONPathPrinter(string(data))
if err != nil {
return nil, false, fmt.Errorf("error parsing template %s, %v\n", string(data), err)
}
case "custom-columns":
var err error
if printer, err = NewCustomColumnsPrinterFromSpec(formatArgument); err != nil {
return nil, false, err
}
case "custom-columns-file":
file, err := os.Open(formatArgument)
if err != nil {
return nil, false, fmt.Errorf("error reading template %s, %v\n", formatArgument, err)
}
if printer, err = NewCustomColumnsPrinterFromTemplate(file); err != nil {
return nil, false, err
}
case "wide":
fallthrough
case "":
return nil, false, nil
default:
return nil, false, fmt.Errorf("output format %q not recognized", format)
}
return printer, true, nil
}
// ResourcePrinter is an interface that knows how to print runtime objects.
type ResourcePrinter interface {
// Print receives a runtime object, formats it and prints it to a writer.
PrintObj(runtime.Object, io.Writer) error
HandledResources() []string
}
// ResourcePrinterFunc is a function that can print objects
type ResourcePrinterFunc func(runtime.Object, io.Writer) error
// PrintObj implements ResourcePrinter
func (fn ResourcePrinterFunc) PrintObj(obj runtime.Object, w io.Writer) error {
return fn(obj, w)
}
// TODO: implement HandledResources()
func (fn ResourcePrinterFunc) HandledResources() []string {
return []string{}
}
// VersionedPrinter takes runtime objects and ensures they are converted to a given API version
// prior to being passed to a nested printer.
type VersionedPrinter struct {
printer ResourcePrinter
convertor runtime.ObjectConvertor
version []string
}
// NewVersionedPrinter wraps a printer to convert objects to a known API version prior to printing.
func NewVersionedPrinter(printer ResourcePrinter, convertor runtime.ObjectConvertor, version ...string) ResourcePrinter {
return &VersionedPrinter{
printer: printer,
convertor: convertor,
version: version,
}
}
// PrintObj implements ResourcePrinter
func (p *VersionedPrinter) PrintObj(obj runtime.Object, w io.Writer) error {
if len(p.version) == 0 {
return fmt.Errorf("no version specified, object cannot be converted")
}
for _, version := range p.version {
if len(version) == 0 {
continue
}
converted, err := p.convertor.ConvertToVersion(obj, version)
if conversion.IsNotRegisteredError(err) {
continue
}
if err != nil {
return err
}
return p.printer.PrintObj(converted, w)
}
return fmt.Errorf("the object cannot be converted to any of the versions: %v", p.version)
}
// TODO: implement HandledResources()
func (p *VersionedPrinter) HandledResources() []string {
return []string{}
}
// NamePrinter is an implementation of ResourcePrinter which outputs "resource/name" pair of an object.
type NamePrinter struct {
}
// PrintObj is an implementation of ResourcePrinter.PrintObj which decodes the object
// and print "resource/name" pair. If the object is a List, print all items in it.
func (p *NamePrinter) PrintObj(obj runtime.Object, w io.Writer) error {
objvalue := reflect.ValueOf(obj).Elem()
kind := objvalue.FieldByName("Kind")
if !kind.IsValid() {
kind = reflect.ValueOf("<unknown>")
}
if kind.String() == "List" {
items := objvalue.FieldByName("Items")
if items.Type().String() == "[]runtime.RawExtension" {
for i := 0; i < items.Len(); i++ {
rawObj := items.Index(i).FieldByName("RawJSON").Interface().([]byte)
scheme := api.Scheme
version, kind, err := scheme.DataVersionAndKind(rawObj)
if err != nil {
return err
}
decodedObj, err := scheme.DecodeToVersion(rawObj, "")
if err != nil {
return err
}
tpmeta := unversioned.TypeMeta{
APIVersion: version,
Kind: kind,
}
s := reflect.ValueOf(decodedObj).Elem()
s.FieldByName("TypeMeta").Set(reflect.ValueOf(tpmeta))
p.PrintObj(decodedObj, w)
}
} else {
return errors.New("the list object contains unrecognized items.")
}
} else {
name := objvalue.FieldByName("Name")
if !name.IsValid() {
name = reflect.ValueOf("<unknown>")
}
_, resource := meta.KindToResource(kind.String(), false)
fmt.Fprintf(w, "%s/%s\n", resource, name)
}
return nil
}
// TODO: implement HandledResources()
func (p *NamePrinter) HandledResources() []string {
return []string{}
}
// JSONPrinter is an implementation of ResourcePrinter which outputs an object as JSON.
type JSONPrinter struct {
}
// PrintObj is an implementation of ResourcePrinter.PrintObj which simply writes the object to the Writer.
func (p *JSONPrinter) PrintObj(obj runtime.Object, w io.Writer) error {
data, err := json.Marshal(obj)
if err != nil {
return err
}
dst := bytes.Buffer{}
err = json.Indent(&dst, data, "", " ")
dst.WriteByte('\n')
_, err = w.Write(dst.Bytes())
return err
}
// TODO: implement HandledResources()
func (p *JSONPrinter) HandledResources() []string {
return []string{}
}
// YAMLPrinter is an implementation of ResourcePrinter which outputs an object as YAML.
// The input object is assumed to be in the internal version of an API and is converted
// to the given version first.
type YAMLPrinter struct {
version string
convertor runtime.ObjectConvertor
}
// PrintObj prints the data as YAML.
func (p *YAMLPrinter) PrintObj(obj runtime.Object, w io.Writer) error {
output, err := yaml.Marshal(obj)
if err != nil {
return err
}
_, err = fmt.Fprint(w, string(output))
return err
}
// TODO: implement HandledResources()
func (p *YAMLPrinter) HandledResources() []string {
return []string{}
}
type handlerEntry struct {
columns []string
printFunc reflect.Value
}
// HumanReadablePrinter is an implementation of ResourcePrinter which attempts to provide
// more elegant output. It is not threadsafe, but you may call PrintObj repeatedly; headers
// will only be printed if the object type changes. This makes it useful for printing items
// received from watches.
type HumanReadablePrinter struct {
handlerMap map[reflect.Type]*handlerEntry
noHeaders bool
withNamespace bool
wide bool
showAll bool
columnLabels []string
lastType reflect.Type
}
// NewHumanReadablePrinter creates a HumanReadablePrinter.
func NewHumanReadablePrinter(noHeaders, withNamespace bool, wide bool, showAll bool, columnLabels []string) *HumanReadablePrinter {
printer := &HumanReadablePrinter{
handlerMap: make(map[reflect.Type]*handlerEntry),
noHeaders: noHeaders,
withNamespace: withNamespace,
wide: wide,
showAll: showAll,
columnLabels: columnLabels,
}
printer.addDefaultHandlers()
return printer
}
// Handler adds a print handler with a given set of columns to HumanReadablePrinter instance.
// See validatePrintHandlerFunc for required method signature.
func (h *HumanReadablePrinter) Handler(columns []string, printFunc interface{}) error {
printFuncValue := reflect.ValueOf(printFunc)
if err := h.validatePrintHandlerFunc(printFuncValue); err != nil {
glog.Errorf("Unable to add print handler: %v", err)
return err
}
objType := printFuncValue.Type().In(0)
h.handlerMap[objType] = &handlerEntry{
columns: columns,
printFunc: printFuncValue,
}
return nil
}
// validatePrintHandlerFunc validates print handler signature.
// printFunc is the function that will be called to print an object.
// It must be of the following type:
// func printFunc(object ObjectType, w io.Writer, withNamespace bool, wide bool, showAll bool, columnLabels []string) error
// where ObjectType is the type of the object that will be printed.
func (h *HumanReadablePrinter) validatePrintHandlerFunc(printFunc reflect.Value) error {
if printFunc.Kind() != reflect.Func {
return fmt.Errorf("invalid print handler. %#v is not a function", printFunc)
}
funcType := printFunc.Type()
if funcType.NumIn() != 6 || funcType.NumOut() != 1 {
return fmt.Errorf("invalid print handler." +
"Must accept 6 parameters and return 1 value.")
}
if funcType.In(1) != reflect.TypeOf((*io.Writer)(nil)).Elem() ||
funcType.In(5) != reflect.TypeOf((*[]string)(nil)).Elem() ||
funcType.Out(0) != reflect.TypeOf((*error)(nil)).Elem() {
return fmt.Errorf("invalid print handler. The expected signature is: "+
"func handler(obj %v, w io.Writer, withNamespace bool, wide bool, showAll bool, columnLabels []string) error", funcType.In(0))
}
return nil
}
func (h *HumanReadablePrinter) HandledResources() []string {
keys := make([]string, 0)
for k := range h.handlerMap {
// k.String looks like "*api.PodList" and we want just "pod"
api := strings.Split(k.String(), ".")
resource := api[len(api)-1]
if strings.HasSuffix(resource, "List") {
continue
}
resource = strings.ToLower(resource)
keys = append(keys, resource)
}
return keys
}
// NOTE: When adding a new resource type here, please update the list
// pkg/kubectl/cmd/get.go to reflect the new resource type.
var podColumns = []string{"NAME", "READY", "STATUS", "RESTARTS", "AGE"}
var podTemplateColumns = []string{"TEMPLATE", "CONTAINER(S)", "IMAGE(S)", "PODLABELS"}
var replicationControllerColumns = []string{"CONTROLLER", "CONTAINER(S)", "IMAGE(S)", "SELECTOR", "REPLICAS", "AGE"}
var jobColumns = []string{"JOB", "CONTAINER(S)", "IMAGE(S)", "SELECTOR", "SUCCESSFUL"}
var serviceColumns = []string{"NAME", "CLUSTER_IP", "EXTERNAL_IP", "PORT(S)", "SELECTOR", "AGE"}
var ingressColumns = []string{"NAME", "RULE", "BACKEND", "ADDRESS"}
var endpointColumns = []string{"NAME", "ENDPOINTS", "AGE"}
var nodeColumns = []string{"NAME", "LABELS", "STATUS", "AGE"}
var daemonSetColumns = []string{"NAME", "CONTAINER(S)", "IMAGE(S)", "SELECTOR", "NODE-SELECTOR"}
var eventColumns = []string{"FIRSTSEEN", "LASTSEEN", "COUNT", "NAME", "KIND", "SUBOBJECT", "REASON", "SOURCE", "MESSAGE"}
var limitRangeColumns = []string{"NAME", "AGE"}
var resourceQuotaColumns = []string{"NAME", "AGE"}
var namespaceColumns = []string{"NAME", "LABELS", "STATUS", "AGE"}
var secretColumns = []string{"NAME", "TYPE", "DATA", "AGE"}
var serviceAccountColumns = []string{"NAME", "SECRETS", "AGE"}
var persistentVolumeColumns = []string{"NAME", "LABELS", "CAPACITY", "ACCESSMODES", "STATUS", "CLAIM", "REASON", "AGE"}
var persistentVolumeClaimColumns = []string{"NAME", "LABELS", "STATUS", "VOLUME", "CAPACITY", "ACCESSMODES", "AGE"}
var componentStatusColumns = []string{"NAME", "STATUS", "MESSAGE", "ERROR"}
var thirdPartyResourceColumns = []string{"NAME", "DESCRIPTION", "VERSION(S)"}
var horizontalPodAutoscalerColumns = []string{"NAME", "REFERENCE", "TARGET", "CURRENT", "MINPODS", "MAXPODS", "AGE"}
var withNamespacePrefixColumns = []string{"NAMESPACE"} // TODO(erictune): print cluster name too.
var deploymentColumns = []string{"NAME", "UPDATEDREPLICAS", "AGE"}
// addDefaultHandlers adds print handlers for default Kubernetes types.
func (h *HumanReadablePrinter) addDefaultHandlers() {
h.Handler(podColumns, printPod)
h.Handler(podColumns, printPodList)
h.Handler(podTemplateColumns, printPodTemplate)
h.Handler(podTemplateColumns, printPodTemplateList)
h.Handler(replicationControllerColumns, printReplicationController)
h.Handler(replicationControllerColumns, printReplicationControllerList)
h.Handler(daemonSetColumns, printDaemonSet)
h.Handler(daemonSetColumns, printDaemonSetList)
h.Handler(jobColumns, printJob)
h.Handler(jobColumns, printJobList)
h.Handler(serviceColumns, printService)
h.Handler(serviceColumns, printServiceList)
h.Handler(ingressColumns, printIngress)
h.Handler(ingressColumns, printIngressList)
h.Handler(endpointColumns, printEndpoints)
h.Handler(endpointColumns, printEndpointsList)
h.Handler(nodeColumns, printNode)
h.Handler(nodeColumns, printNodeList)
h.Handler(eventColumns, printEvent)
h.Handler(eventColumns, printEventList)
h.Handler(limitRangeColumns, printLimitRange)
h.Handler(limitRangeColumns, printLimitRangeList)
h.Handler(resourceQuotaColumns, printResourceQuota)
h.Handler(resourceQuotaColumns, printResourceQuotaList)
h.Handler(namespaceColumns, printNamespace)
h.Handler(namespaceColumns, printNamespaceList)
h.Handler(secretColumns, printSecret)
h.Handler(secretColumns, printSecretList)
h.Handler(serviceAccountColumns, printServiceAccount)
h.Handler(serviceAccountColumns, printServiceAccountList)
h.Handler(persistentVolumeClaimColumns, printPersistentVolumeClaim)
h.Handler(persistentVolumeClaimColumns, printPersistentVolumeClaimList)
h.Handler(persistentVolumeColumns, printPersistentVolume)
h.Handler(persistentVolumeColumns, printPersistentVolumeList)
h.Handler(componentStatusColumns, printComponentStatus)
h.Handler(componentStatusColumns, printComponentStatusList)
h.Handler(thirdPartyResourceColumns, printThirdPartyResource)
h.Handler(thirdPartyResourceColumns, printThirdPartyResourceList)
h.Handler(deploymentColumns, printDeployment)
h.Handler(deploymentColumns, printDeploymentList)
h.Handler(horizontalPodAutoscalerColumns, printHorizontalPodAutoscaler)
h.Handler(horizontalPodAutoscalerColumns, printHorizontalPodAutoscalerList)
}
func (h *HumanReadablePrinter) unknown(data []byte, w io.Writer) error {
_, err := fmt.Fprintf(w, "Unknown object: %s", string(data))
return err
}
func (h *HumanReadablePrinter) printHeader(columnNames []string, w io.Writer) error {
if _, err := fmt.Fprintf(w, "%s\n", strings.Join(columnNames, "\t")); err != nil {
return err
}
return nil
}
// Pass ports=nil for all ports.
func formatEndpoints(endpoints *api.Endpoints, ports sets.String) string {
if len(endpoints.Subsets) == 0 {
return "<none>"
}
list := []string{}
max := 3
more := false
count := 0
for i := range endpoints.Subsets {
ss := &endpoints.Subsets[i]
for i := range ss.Ports {
port := &ss.Ports[i]
if ports == nil || ports.Has(port.Name) {
for i := range ss.Addresses {
if len(list) == max {
more = true
}
addr := &ss.Addresses[i]
if !more {
list = append(list, fmt.Sprintf("%s:%d", addr.IP, port.Port))
}
count++
}
}
}
}
ret := strings.Join(list, ",")
if more {
return fmt.Sprintf("%s + %d more...", ret, count-max)
}
return ret
}
func podHostString(host, ip string) string {
if host == "" && ip == "" {
return "<unassigned>"
}
return host + "/" + ip
}
func shortHumanDuration(d time.Duration) string {
// Allow deviation no more than 2 seconds(excluded) to tolerate machine time
// inconsistence, it can be considered as almost now.
if seconds := int(d.Seconds()); seconds < -1 {
return fmt.Sprintf("<invalid>")
} else if seconds < 0 {
return fmt.Sprintf("0s")
} else if seconds < 60 {
return fmt.Sprintf("%ds", seconds)
} else if minutes := int(d.Minutes()); minutes < 60 {
return fmt.Sprintf("%dm", minutes)
} else if hours := int(d.Hours()); hours < 24 {
return fmt.Sprintf("%dh", hours)
} else if hours < 24*364 {
return fmt.Sprintf("%dd", hours/24)
}
return fmt.Sprintf("%dy", int(d.Hours()/24/365))
}
// translateTimestamp returns the elapsed time since timestamp in
// human-readable approximation.
func translateTimestamp(timestamp unversioned.Time) string {
if timestamp.IsZero() {
return "<unknown>"
}
return shortHumanDuration(time.Now().Sub(timestamp.Time))
}
func printPod(pod *api.Pod, w io.Writer, withNamespace bool, wide bool, showAll bool, columnLabels []string) error {
return printPodBase(pod, w, withNamespace, wide, showAll, true, columnLabels)
}
func printPodBase(pod *api.Pod, w io.Writer, withNamespace bool, wide bool, showAll bool, showIfTerminating bool, columnLabels []string) error {
name := pod.Name
namespace := pod.Namespace
restarts := 0
totalContainers := len(pod.Spec.Containers)
readyContainers := 0
reason := string(pod.Status.Phase)
// if not printing all pods, skip terminated pods (default)
if !showIfTerminating && !showAll && (reason == string(api.PodSucceeded) || reason == string(api.PodFailed)) {
return nil
}
if pod.Status.Reason != "" {
reason = pod.Status.Reason
}
for i := len(pod.Status.ContainerStatuses) - 1; i >= 0; i-- {
container := pod.Status.ContainerStatuses[i]
restarts += container.RestartCount
if container.State.Waiting != nil && container.State.Waiting.Reason != "" {
reason = container.State.Waiting.Reason
} else if container.State.Terminated != nil && container.State.Terminated.Reason != "" {
reason = container.State.Terminated.Reason
} else if container.State.Terminated != nil && container.State.Terminated.Reason == "" {
if container.State.Terminated.Signal != 0 {
reason = fmt.Sprintf("Signal:%d", container.State.Terminated.Signal)
} else {
reason = fmt.Sprintf("ExitCode:%d", container.State.Terminated.ExitCode)
}
} else if container.Ready && container.State.Running != nil {
readyContainers++
}
}
if pod.DeletionTimestamp != nil {
reason = "Terminating"
}
if withNamespace {
if _, err := fmt.Fprintf(w, "%s\t", namespace); err != nil {
return err
}
}
if _, err := fmt.Fprintf(w, "%s\t%d/%d\t%s\t%d\t%s",
name,
readyContainers,
totalContainers,
reason,
restarts,
translateTimestamp(pod.CreationTimestamp),
); err != nil {
return err
}
if wide {
nodeName := pod.Spec.NodeName
if _, err := fmt.Fprintf(w, "\t%s",
nodeName,
); err != nil {
return err
}
}
_, err := fmt.Fprint(w, appendLabels(pod.Labels, columnLabels))
return err
}
func printPodList(podList *api.PodList, w io.Writer, withNamespace bool, wide bool, showAll bool, columnLabels []string) error {
for _, pod := range podList.Items {
if err := printPodBase(&pod, w, withNamespace, wide, showAll, false, columnLabels); err != nil {
return err
}
}
return nil
}
func printPodTemplate(pod *api.PodTemplate, w io.Writer, withNamespace bool, wide bool, showAll bool, columnLabels []string) error {
name := pod.Name
namespace := pod.Namespace
containers := pod.Template.Spec.Containers
var firstContainer api.Container
if len(containers) > 0 {
firstContainer, containers = containers[0], containers[1:]
}
if withNamespace {
if _, err := fmt.Fprintf(w, "%s\t", namespace); err != nil {
return err
}
}
if _, err := fmt.Fprintf(w, "%s\t%s\t%s\t%s",
name,
firstContainer.Name,
firstContainer.Image,
labels.FormatLabels(pod.Template.Labels),
); err != nil {
return err
}
if _, err := fmt.Fprint(w, appendLabels(pod.Labels, columnLabels)); err != nil {
return err
}
// Lay out all the other containers on separate lines.
extraLinePrefix := "\t"
if withNamespace {
extraLinePrefix = "\t\t"
}
for _, container := range containers {
_, err := fmt.Fprintf(w, "%s%s\t%s\t%s", extraLinePrefix, container.Name, container.Image, "")
if err != nil {
return err
}
if _, err := fmt.Fprint(w, appendLabelTabs(columnLabels)); err != nil {
return err
}
}
return nil
}
func printPodTemplateList(podList *api.PodTemplateList, w io.Writer, withNamespace bool, wide bool, showAll bool, columnLabels []string) error {
for _, pod := range podList.Items {
if err := printPodTemplate(&pod, w, withNamespace, wide, showAll, columnLabels); err != nil {
return err
}
}
return nil
}
func printReplicationController(controller *api.ReplicationController, w io.Writer, withNamespace bool, wide bool, showAll bool, columnLabels []string) error {
name := controller.Name
namespace := controller.Namespace
containers := controller.Spec.Template.Spec.Containers
var firstContainer api.Container
if len(containers) > 0 {
firstContainer, containers = containers[0], containers[1:]
}
if withNamespace {
if _, err := fmt.Fprintf(w, "%s\t", namespace); err != nil {
return err
}
}
if _, err := fmt.Fprintf(w, "%s\t%s\t%s\t%s\t%d\t%s",
name,
firstContainer.Name,
firstContainer.Image,
labels.FormatLabels(controller.Spec.Selector),
controller.Spec.Replicas,
translateTimestamp(controller.CreationTimestamp),
); err != nil {
return err
}
if _, err := fmt.Fprint(w, appendLabels(controller.Labels, columnLabels)); err != nil {
return err
}
// Lay out all the other containers on separate lines.
extraLinePrefix := "\t"
if withNamespace {
extraLinePrefix = "\t\t"
}
for _, container := range containers {
_, err := fmt.Fprintf(w, "%s%s\t%s\t%s\t%s", extraLinePrefix, container.Name, container.Image, "", "")
if err != nil {
return err
}
if _, err := fmt.Fprint(w, appendLabelTabs(columnLabels)); err != nil {
return err
}
}
return nil
}
func printReplicationControllerList(list *api.ReplicationControllerList, w io.Writer, withNamespace bool, wide bool, showAll bool, columnLabels []string) error {
for _, controller := range list.Items {
if err := printReplicationController(&controller, w, withNamespace, wide, showAll, columnLabels); err != nil {
return err
}
}
return nil
}
func printJob(job *extensions.Job, w io.Writer, withNamespace bool, wide bool, showAll bool, columnLabels []string) error {
name := job.Name
namespace := job.Namespace
containers := job.Spec.Template.Spec.Containers
var firstContainer api.Container
if len(containers) > 0 {
firstContainer, containers = containers[0], containers[1:]
}
if withNamespace {
if _, err := fmt.Fprintf(w, "%s\t", namespace); err != nil {
return err
}
}
selector, _ := extensions.PodSelectorAsSelector(job.Spec.Selector)
_, err := fmt.Fprintf(w, "%s\t%s\t%s\t%s\t%d",
name,
firstContainer.Name,
firstContainer.Image,
selector.String(),
job.Status.Succeeded)
if err != nil {
return err
}
if _, err := fmt.Fprint(w, appendLabels(job.Labels, columnLabels)); err != nil {
return err
}
// Lay out all the other containers on separate lines.
extraLinePrefix := "\t"
if withNamespace {
extraLinePrefix = "\t\t"
}
for _, container := range containers {
_, err := fmt.Fprintf(w, "%s%s\t%s\t%s\t%s", extraLinePrefix, container.Name, container.Image, "", "")
if err != nil {
return err
}
if _, err := fmt.Fprint(w, appendLabelTabs(columnLabels)); err != nil {
return err
}
}
return nil
}
func printJobList(list *extensions.JobList, w io.Writer, withNamespace bool, wide bool, showAll bool, columnLabels []string) error {
for _, job := range list.Items {
if err := printJob(&job, w, withNamespace, wide, showAll, columnLabels); err != nil {
return err
}
}
return nil
}
// loadBalancerStatusStringer behaves just like a string interface and converts the given status to a string.
func loadBalancerStatusStringer(s api.LoadBalancerStatus) string {
ingress := s.Ingress
result := []string{}
for i := range ingress {
if ingress[i].IP != "" {
result = append(result, ingress[i].IP)
}
}
return strings.Join(result, ",")
}
func getServiceExternalIP(svc *api.Service) string {
switch svc.Spec.Type {
case api.ServiceTypeClusterIP:
if len(svc.Spec.ExternalIPs) > 0 {
return strings.Join(svc.Spec.ExternalIPs, ",")
}
return "<none>"
case api.ServiceTypeNodePort:
if len(svc.Spec.ExternalIPs) > 0 {
return strings.Join(svc.Spec.ExternalIPs, ",")
}
return "nodes"
case api.ServiceTypeLoadBalancer:
lbIps := loadBalancerStatusStringer(svc.Status.LoadBalancer)
if len(svc.Spec.ExternalIPs) > 0 {
result := append(strings.Split(lbIps, ","), svc.Spec.ExternalIPs...)
return strings.Join(result, ",")
}
return lbIps
}
return "unknown"
}
func makePortString(ports []api.ServicePort) string {
pieces := make([]string, len(ports))
for ix := range ports {
port := &ports[ix]
pieces[ix] = fmt.Sprintf("%d/%s", port.Port, port.Protocol)
}
return strings.Join(pieces, ",")
}
func printService(svc *api.Service, w io.Writer, withNamespace bool, wide bool, showAll bool, columnLabels []string) error {
name := svc.Name
namespace := svc.Namespace
internalIP := svc.Spec.ClusterIP
externalIP := getServiceExternalIP(svc)
if withNamespace {
if _, err := fmt.Fprintf(w, "%s\t", namespace); err != nil {
return err
}
}
if _, err := fmt.Fprintf(w, "%s\t%s\t%s\t%s\t%s\t%s",
name,
internalIP,
externalIP,
makePortString(svc.Spec.Ports),
labels.FormatLabels(svc.Spec.Selector),
translateTimestamp(svc.CreationTimestamp),
); err != nil {
return err
}
if _, err := fmt.Fprint(w, appendLabels(svc.Labels, columnLabels)); err != nil {
return err
}
return nil
}
func printServiceList(list *api.ServiceList, w io.Writer, withNamespace bool, wide bool, showAll bool, columnLabels []string) error {
for _, svc := range list.Items {
if err := printService(&svc, w, withNamespace, wide, showAll, columnLabels); err != nil {
return err
}
}
return nil
}
// backendStringer behaves just like a string interface and converts the given backend to a string.
func backendStringer(backend *extensions.IngressBackend) string {
if backend == nil {
return ""
}
return fmt.Sprintf("%v:%v", backend.ServiceName, backend.ServicePort.String())
}
func printIngress(ingress *extensions.Ingress, w io.Writer, withNamespace, wide bool, showAll bool, columnLabels []string) error {
name := ingress.Name
namespace := ingress.Namespace
hostRules := ingress.Spec.Rules
if withNamespace {
if _, err := fmt.Fprintf(w, "%s\t", namespace); err != nil {
return err
}
}
if _, err := fmt.Fprintf(w, "%s\t%v\t%v\t%v\n",
name,
"-",
backendStringer(ingress.Spec.Backend),
loadBalancerStatusStringer(ingress.Status.LoadBalancer)); err != nil {
return err
}
// Lay out all the rules on separate lines.
extraLinePrefix := ""
if withNamespace {
extraLinePrefix = "\t"
}
for _, rules := range hostRules {
if rules.HTTP == nil {
continue
}
_, err := fmt.Fprintf(w, "%s\t%v\t", extraLinePrefix, rules.Host)
if err != nil {
return err
}
if _, err := fmt.Fprint(w, appendLabelTabs(columnLabels)); err != nil {
return err
}
for _, rule := range rules.HTTP.Paths {
_, err := fmt.Fprintf(w, "%s\t%v\t%v", extraLinePrefix, rule.Path, backendStringer(&rule.Backend))
if err != nil {
return err
}
if _, err := fmt.Fprint(w, appendLabelTabs(columnLabels)); err != nil {
return err
}
}
}
return nil
}
func printIngressList(ingressList *extensions.IngressList, w io.Writer, withNamespace, wide bool, showAll bool, columnLabels []string) error {
for _, ingress := range ingressList.Items {
if err := printIngress(&ingress, w, withNamespace, wide, true, columnLabels); err != nil {
return err
}
}
return nil
}
func printDaemonSet(ds *extensions.DaemonSet, w io.Writer, withNamespace bool, wide bool, showAll bool, columnLabels []string) error {
name := ds.Name
namespace := ds.Namespace
containers := ds.Spec.Template.Spec.Containers
var firstContainer api.Container
if len(containers) > 0 {
firstContainer, containers = containers[0], containers[1:]
}
if withNamespace {
if _, err := fmt.Fprintf(w, "%s\t", namespace); err != nil {
return err
}
}
if _, err := fmt.Fprintf(w, "%s\t%s\t%s\t%s\t%s",
name,
firstContainer.Name,
firstContainer.Image,
labels.FormatLabels(ds.Spec.Selector),
labels.FormatLabels(ds.Spec.Template.Spec.NodeSelector),
); err != nil {
return err
}
if _, err := fmt.Fprint(w, appendLabels(ds.Labels, columnLabels)); err != nil {
return err
}
// Lay out all the other containers on separate lines.
extraLinePrefix := "\t"
if withNamespace {
extraLinePrefix = "\t\t"
}
for _, container := range containers {
_, err := fmt.Fprintf(w, "%s%s\t%s\t%s\t%s", extraLinePrefix, container.Name, container.Image, "", "")
if err != nil {
return err
}
if _, err := fmt.Fprint(w, appendLabelTabs(columnLabels)); err != nil {
return err
}
}
return nil
}
func printDaemonSetList(list *extensions.DaemonSetList, w io.Writer, withNamespace bool, wide bool, showAll bool, columnLabels []string) error {
for _, ds := range list.Items {
if err := printDaemonSet(&ds, w, withNamespace, wide, showAll, columnLabels); err != nil {
return err
}
}
return nil
}
func printEndpoints(endpoints *api.Endpoints, w io.Writer, withNamespace bool, wide bool, showAll bool, columnLabels []string) error {
name := endpoints.Name
namespace := endpoints.Namespace
if withNamespace {
if _, err := fmt.Fprintf(w, "%s\t", namespace); err != nil {
return err
}
}
if _, err := fmt.Fprintf(w, "%s\t%s\t%s", name, formatEndpoints(endpoints, nil), translateTimestamp(endpoints.CreationTimestamp)); err != nil {
return err
}
_, err := fmt.Fprint(w, appendLabels(endpoints.Labels, columnLabels))
return err
}
func printEndpointsList(list *api.EndpointsList, w io.Writer, withNamespace bool, wide bool, showAll bool, columnLabels []string) error {
for _, item := range list.Items {
if err := printEndpoints(&item, w, withNamespace, wide, showAll, columnLabels); err != nil {
return err
}