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exportintochart.go
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exportintochart.go
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package cmd
import (
"bytes"
//"encoding/json"
"fmt"
"io"
"strings"
"github.com/helm/helm-classic/codec"
"github.com/spf13/cobra"
"k8s.io/kubernetes/pkg/api/meta"
kapi "k8s.io/kubernetes/pkg/api/v1"
"k8s.io/kubernetes/pkg/kubectl"
kubectlcmd "k8s.io/kubernetes/pkg/kubectl/cmd"
cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
"k8s.io/kubernetes/pkg/kubectl/resource"
"k8s.io/kubernetes/pkg/runtime"
utilerrors "k8s.io/kubernetes/pkg/util/errors"
//"k8s.io/kubernetes/pkg/watch"
)
// GetOptions is the start of the data required to perform the operation. As new fields are added, add them here instead of
// referencing the cmd.Flags()
type ExportIntoChartOptions struct {
kubectlcmd.GetOptions
}
//type GetOptions struct {
// Filenames []string
// Recursive bool
//
// Raw string
//}
const (
get_long = `Display one or many resources.
` + kubectl.PossibleResourceTypes + `
By specifying the output as 'template' and providing a Go template as the value
of the --template flag, you can filter the attributes of the fetched resource(s).`
get_example = `# List all pods in ps output format.
kubectl get pods
# List all pods in ps output format with more information (such as node name).
kubectl get pods -o wide
# List a single replication controller with specified NAME in ps output format.
kubectl get replicationcontroller web
# List a single pod in JSON output format.
kubectl get -o json pod web-pod-13je7
# List a pod identified by type and name specified in "pod.yaml" in JSON output format.
kubectl get -f pod.yaml -o json
# Return only the phase value of the specified pod.
kubectl get -o template pod/web-pod-13je7 --template={{.status.phase}}
# List all replication controllers and services together in ps output format.
kubectl get rc,services
# List one or more resources by their type and names.
kubectl get rc/web service/frontend pods/web-pod-13je7`
)
// NewCmdGet creates a command object for the generic "get" action, which
// retrieves one or more resources from a server.
func NewCmdExportIntoChart(f *cmdutil.Factory, out io.Writer) *cobra.Command {
//func NewCmdGet(f *cmdutil.Factory, out io.Writer) *cobra.Command {
// options := &GetOptions{}
options := &ExportIntoChartOptions{}
// retrieve a list of handled resources from printer as valid args
validArgs, argAliases := []string{}, []string{}
p, err := f.Printer(nil, nil)
cmdutil.CheckErr(err)
if p != nil {
validArgs = p.HandledResources()
argAliases = kubectl.ResourceAliases(validArgs)
}
cmd := &cobra.Command{
//Use: "get [(-o|--output=)json|yaml|wide|go-template=...|go-template-file=...|jsonpath=...|jsonpath-file=...] (TYPE [NAME | -l label] | TYPE/NAME ...) [flags]",
Use: "export-into-chart [(-o|--output=)json|yaml|wide|go-template=...|go-template-file=...|jsonpath=...|jsonpath-file=...] (TYPE [NAME | -l label] | TYPE/NAME ...) [flags]",
Short: "Display one or many resources",
Long: get_long,
Example: get_example,
Run: func(cmd *cobra.Command, args []string) {
//err := RunGet(f, out, cmd, args, options)
err := RunExportIntoChart(f, out, cmd, args, options)
cmdutil.CheckErr(err)
},
SuggestFor: []string{"list", "ps"},
ValidArgs: validArgs,
ArgAliases: argAliases,
}
cmdutil.AddPrinterFlags(cmd)
cmd.Flags().StringP("selector", "l", "", "Selector (label query) to filter on")
cmd.Flags().BoolP("watch", "w", false, "After listing/getting the requested object, watch for changes.")
cmd.Flags().Bool("watch-only", false, "Watch for changes to the requested object(s), without listing/getting first.")
cmd.Flags().Bool("all-namespaces", false, "If present, list the requested object(s) across all namespaces. Namespace in current context is ignored even if specified with --namespace.")
cmd.Flags().Bool("show-kind", false, "If present, list the kind of each requested resource.")
cmd.Flags().StringSliceP("label-columns", "L", []string{}, "Accepts a comma separated list of labels that are going to be presented as columns. Names are case-sensitive. You can also use multiple flag statements like -L label1 -L label2...")
cmd.Flags().Bool("export", false, "If true, use 'export' for the resources. Exported resources are stripped of cluster-specific information.")
usage := "Filename, directory, or URL to a file identifying the resource to get from a server."
kubectl.AddJsonFilenameFlag(cmd, &options.Filenames, usage)
cmdutil.AddRecursiveFlag(cmd, &options.Recursive)
cmdutil.AddInclude3rdPartyFlags(cmd)
cmd.Flags().StringVar(&options.Raw, "raw", options.Raw, "Raw URI to request from the server. Uses the transport specified by the kubeconfig file.")
return cmd
}
// RunGet implements the generic Get command
// TODO: convert all direct flag accessors to a struct and pass that instead of cmd
func RunExportIntoChart(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string, options *ExportIntoChartOptions) error {
//func RunGet(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string, options *GetOptions) error {
if len(options.Raw) > 0 {
client, err := f.Client()
if err != nil {
return err
}
stream, err := client.RESTClient.Get().RequestURI(options.Raw).Stream()
if err != nil {
return err
}
defer stream.Close()
for {
buffer := make([]byte, 1024, 1024)
bytesRead, err := stream.Read(buffer)
if bytesRead > 0 {
fmt.Printf("%s", string(buffer[:bytesRead]))
}
if err == io.EOF {
return nil
}
if err != nil {
return err
}
}
}
selector := cmdutil.GetFlagString(cmd, "selector")
allNamespaces := cmdutil.GetFlagBool(cmd, "all-namespaces")
showKind := cmdutil.GetFlagBool(cmd, "show-kind")
mapper, typer := f.Object(cmdutil.GetIncludeThirdPartyAPIs(cmd))
cmdNamespace, enforceNamespace, err := f.DefaultNamespace()
if err != nil {
return err
}
if allNamespaces {
enforceNamespace = false
}
if len(args) == 0 && len(options.Filenames) == 0 {
fmt.Fprint(out, "You must specify the type of resource to get. ", valid_resources)
return cmdutil.UsageError(cmd, "Required resource not specified.")
}
// always show resources when getting by name or filename
argsHasNames, err := resource.HasNames(args)
if err != nil {
return err
}
if len(options.Filenames) > 0 || argsHasNames {
cmd.Flag("show-all").Value.Set("true")
}
export := cmdutil.GetFlagBool(cmd, "export")
/*// handle watch separately since we cannot watch multiple resource types
isWatch, isWatchOnly := cmdutil.GetFlagBool(cmd, "watch"), cmdutil.GetFlagBool(cmd, "watch-only")
if isWatch || isWatchOnly {
r := resource.NewBuilder(mapper, typer, resource.ClientMapperFunc(f.ClientForMapping), f.Decoder(true)).
NamespaceParam(cmdNamespace).DefaultNamespace().AllNamespaces(allNamespaces).
FilenameParam(enforceNamespace, options.Recursive, options.Filenames...).
SelectorParam(selector).
ExportParam(export).
ResourceTypeOrNameArgs(true, args...).
SingleResourceType().
Latest().
Do()
err := r.Err()
if err != nil {
return err
}
infos, err := r.Infos()
if err != nil {
return err
}
if len(infos) != 1 {
return fmt.Errorf("watch is only supported on individual resources and resource collections - %d resources were found", len(infos))
}
info := infos[0]
mapping := info.ResourceMapping()
printer, err := f.PrinterForMapping(cmd, mapping, allNamespaces)
if err != nil {
return err
}
obj, err := r.Object()
if err != nil {
return err
}
// watching from resourceVersion 0, starts the watch at ~now and
// will return an initial watch event. Starting form ~now, rather
// the rv of the object will insure that we start the watch from
// inside the watch window, which the rv of the object might not be.
rv := "0"
isList := meta.IsListType(obj)
if isList {
// the resourceVersion of list objects is ~now but won't return
// an initial watch event
rv, err = mapping.MetadataAccessor.ResourceVersion(obj)
if err != nil {
return err
}
}
// print the current object
if !isWatchOnly {
if err := printer.PrintObj(obj, out); err != nil {
return fmt.Errorf("unable to output the provided object: %v", err)
}
}
// print watched changes
w, err := r.Watch(rv)
if err != nil {
return err
}
first := true
kubectl.WatchLoop(w, func(e watch.Event) error {
if !isList && first {
// drop the initial watch event in the single resource case
first = false
return nil
}
return printer.PrintObj(e.Object, out)
})
return nil
}
r := resource.NewBuilder(mapper, typer, resource.ClientMapperFunc(f.ClientForMapping), f.Decoder(true)).
NamespaceParam(cmdNamespace).DefaultNamespace().AllNamespaces(allNamespaces).
FilenameParam(enforceNamespace, options.Recursive, options.Filenames...).
SelectorParam(selector).
ExportParam(export).
ResourceTypeOrNameArgs(true, args...).
ContinueOnError().
Latest().
Flatten().
Do()
err = r.Err()
if err != nil {
return err
}
printer, generic, err := cmdutil.PrinterForCommand(cmd)
if err != nil {
return err
}
if generic {
clientConfig, err := f.ClientConfig()
if err != nil {
return err
}
allErrs := []error{}
singular := false
infos, err := r.IntoSingular(&singular).Infos()
if err != nil {
if singular {
return err
}
allErrs = append(allErrs, err)
}
// the outermost object will be converted to the output-version, but inner
// objects can use their mappings
version, err := cmdutil.OutputVersion(cmd, clientConfig.GroupVersion)
if err != nil {
return err
}
obj, err := resource.AsVersionedObject(infos, !singular, version, f.JSONEncoder())
if err != nil {
return err
}
if err := printer.PrintObj(obj, out); err != nil {
allErrs = append(allErrs, err)
}
return utilerrors.NewAggregate(allErrs)
}
allErrs := []error{}
infos, err := r.Infos()
if err != nil {
allErrs = append(allErrs, err)
}
objs := make([]runtime.Object, len(infos))
for ix := range infos {
objs[ix] = infos[ix].Object
}
sorting, err := cmd.Flags().GetString("sort-by")
var sorter *kubectl.RuntimeSort
if err == nil && len(sorting) > 0 && len(objs) > 1 {
clientConfig, err := f.ClientConfig()
if err != nil {
return err
}
version, err := cmdutil.OutputVersion(cmd, clientConfig.GroupVersion)
if err != nil {
return err
}
for ix := range infos {
objs[ix], err = infos[ix].Mapping.ConvertToVersion(infos[ix].Object, version)
if err != nil {
allErrs = append(allErrs, err)
continue
}
}
// TODO: questionable
if sorter, err = kubectl.SortObjects(f.Decoder(true), objs, sorting); err != nil {
return err
}
}
// use the default printer for each object
printer = nil
var lastMapping *meta.RESTMapping
w := kubectl.GetNewTabWriter(out)
defer w.Flush()
if mustPrintWithKinds(objs, infos, sorter) {
showKind = true
}
for ix := range objs {
var mapping *meta.RESTMapping
var original runtime.Object
if sorter != nil {
mapping = infos[sorter.OriginalPosition(ix)].Mapping
original = infos[sorter.OriginalPosition(ix)].Object
} else {
mapping = infos[ix].Mapping
original = infos[ix].Object
}
if printer == nil || lastMapping == nil || mapping == nil || mapping.Resource != lastMapping.Resource {
printer, err = f.PrinterForMapping(cmd, mapping, allNamespaces)
if err != nil {
allErrs = append(allErrs, err)
continue
}
lastMapping = mapping
}
if resourcePrinter, found := printer.(*kubectl.HumanReadablePrinter); found {
resourceName := resourcePrinter.GetResourceName()
if mapping != nil {
if resourceName == "" {
resourceName = mapping.Resource
}
if alias, ok := kubectl.ResourceShortFormFor(mapping.Resource); ok {
resourceName = alias
} else if resourceName == "" {
resourceName = "none"
}
} else {
resourceName = "none"
}
if showKind {
resourcePrinter.EnsurePrintWithKind(resourceName)
}
if err := printer.PrintObj(original, w); err != nil {
allErrs = append(allErrs, err)
}
continue
}
if err := printer.PrintObj(original, w); err != nil {
allErrs = append(allErrs, err)
continue
}
}
return utilerrors.NewAggregate(allErrs)*/
r := resource.NewBuilder(mapper, typer, resource.ClientMapperFunc(f.ClientForMapping), f.Decoder(true)).
NamespaceParam(cmdNamespace).DefaultNamespace().AllNamespaces(allNamespaces).
FilenameParam(enforceNamespace, options.Recursive, options.Filenames...).
SelectorParam(selector).
ExportParam(export).
ResourceTypeOrNameArgs(true, args...).
ContinueOnError().
Latest().
Flatten().
Do()
err = r.Err()
if err != nil {
return err
}
allErrs := []error{}
infos, err := r.Infos()
if err != nil {
allErrs = append(allErrs, err)
}
objs := make([]runtime.Object, len(infos))
for ix := range infos {
objs[ix] = infos[ix].Object
}
sorting, err := cmd.Flags().GetString("sort-by")
var sorter *kubectl.RuntimeSort
if err == nil && len(sorting) > 0 && len(objs) > 1 {
clientConfig, err := f.ClientConfig()
if err != nil {
return err
}
version, err := cmdutil.OutputVersion(cmd, clientConfig.GroupVersion)
if err != nil {
return err
}
for ix := range infos {
objs[ix], err = infos[ix].Mapping.ConvertToVersion(infos[ix].Object, version)
if err != nil {
allErrs = append(allErrs, err)
continue
}
}
// TODO: questionable
if sorter, err = kubectl.SortObjects(f.Decoder(true), objs, sorting); err != nil {
return err
}
}
// use the default printer for each object
//printer = nil //printer -> kubectl.ResourcePrinter
var lastMapping *meta.RESTMapping
if mustPrintWithKinds(objs, infos, sorter) {
showKind = true
}
for ix := range objs {
var mapping *meta.RESTMapping
var original runtime.Object
if sorter != nil {
mapping = infos[sorter.OriginalPosition(ix)].Mapping
original = infos[sorter.OriginalPosition(ix)].Object
} else {
mapping = infos[ix].Mapping
original = infos[ix].Object
}
if lastMapping == nil || mapping == nil || mapping.Resource != lastMapping.Resource {
lastMapping = mapping
}
resourceName := ""
if mapping != nil && resourceName == "" {
resourceName = mapping.Resource
if resourceName == "" {
resourceName = "none"
}
}
var buf *bytes.Buffer = &bytes.Buffer{}
//var b []byte
//b, err = json.Marshal(original)
//if err != nil {
if err = codec.JSON.Encode(buf).One(original); err != nil {
allErrs = append(allErrs, err)
continue
}
if showKind {
fmt.Printf("Convert %s from %s\n", resourceName /*string(b)*/, buf.String())
}
var hco *codec.Object
if hco, err = codec.JSON.Decode(buf.Bytes()).One(); err != nil {
allErrs = append(allErrs, err)
continue
}
buf.Reset()
buf.WriteString("# Default value for\n")
switch strings.ToLower(resourceName) {
case "services":
tgt := new(kapi.Service)
if err = hco.Object(tgt); err != nil {
allErrs = append(allErrs, err)
continue
}
var k, v string
k = "name"
v = tgt.Name
if _, ok := metadata_chart_value[k]; ok {
metadata_chart_value[k] = v
}
k = "namespace"
v = tag.Namespace
if _, ok := metadata_chart_value[k]; ok {
metadata_chart_value[k] = v
}
k = "labels"
v = tag.Labels
if _, ok := metadata_chart_value[k]; ok {
metadata_chart_value[k] = v
}
k = "annotations"
v = tag.Annotations
if _, ok := metadata_chart_value[k]; ok {
metadata_chart_value[k] = v
}
service_chart_value = map[string]interface{}{
"metadata": metadata_chart_value,
"spec": map[string]interface{}{},
}
service_spec := service_chart_value["spec"]
k = "clusterIP"
v = tgt.Spec.ClusterIP
if false == strings.Compare(v, "None") {
v = ""
}
if _, ok := service_chart_value[k]; ok {
service_spec[k] = v
}
for i := range tgt.Spec.Ports {
var p int32
k = "name"
v = tgt.Spec.Ports[i].Name
if _, ok := serviceport_chart_value[k]; ok {
serviceport_chart_value[k] = v
}
k = "nodePort"
p = tgt.Spec.Ports[i].NodePort
if _, ok := serviceport_chart_value[k]; ok {
serviceport_chart_value[k] = p
}
k = "port"
p = tag.Spec.Ports[i].Port
if _, ok := serviceport_chart_value[k]; ok {
serviceport_chart_value[k] = p
}
k = "protocol"
v = tag.Spec.Ports[i].Protocol
if _, ok := serviceport_chart_value[k]; ok {
serviceport_chart_value[k] = v
}
k = "targetPort"
v = int32(tag.Spec.Ports[i].TargetPort.IntValue())
if _, ok := serviceport_chart_value[k]; ok {
serviceport_chart_value[k] = v
}
}
service_spec["ports"] = append(service_spec["ports"], serviceport_chart_value)
case "deployments":
default:
allErrs = append(allErrs, fmt.Errorf("Not implemented or unknown resource type"))
}
}
return utilerrors.NewAggregate(allErrs)
}
// mustPrintWithKinds determines if printer is dealing
// with multiple resource kinds, in which case it will
// return true, indicating resource kind will be
// included as part of printer output
func mustPrintWithKinds(objs []runtime.Object, infos []*resource.Info, sorter *kubectl.RuntimeSort) bool {
var lastMap *meta.RESTMapping
for ix := range objs {
var mapping *meta.RESTMapping
if sorter != nil {
mapping = infos[sorter.OriginalPosition(ix)].Mapping
} else {
mapping = infos[ix].Mapping
}
// display "kind" only if we have mixed resources
if lastMap != nil && mapping.Resource != lastMap.Resource {
return true
}
lastMap = mapping
}
return false
}
var (
metadata_chart_value = map[string]interface{}{
"name": "",
"namespace": "default",
"labels": map[string]string{},
"annotations": map[string]string{},
}
serviceport_chart_value = map[string]interface{}{
"name": "",
"nodePort": 0,
"port": 0,
"protocol": "TCP",
"targetPort": 0,
}
service_chart_value = map[string]interface{}{
"metadata": metadata_chart_value,
"spec": map[string]interface{}{
"clusterIP": "",
"ports": []map[string]interface{}{serviceport_chart_value},
"selector": map[string]string{},
"sessionAffinity": "None",
"type": "ClusterIP",
},
}
env_chart_value = map[string]string{
"name": "",
"value": "",
}
container_port_chart_value = map[string]interface{}{
"containerPort": 0,
"protocol": "TCP",
}
container_chart_value = map[string]string{
"args": []string{},
"command": []string{},
"env": []map[string]string{env_chart_value},
"imageRepo": "",
"imageTag": "latest",
"imagePullPolicy": "Always",
"name": "",
"ports": []map[string]interface{}{container_port_chart_value},
"resources": {},
"workingDir": "",
}
localobjectreference_chart_value = map[string]string{
"name": "",
}
volume_chart_value = map[string]interface{}{
"name": "",
"hostPath": *(map[string]interface{})(nil),
"emptyDir": *(map[string]interface{})(nil),
"nfs": *(map[string]interface{})(nil),
"iscsi": *(map[string]interface{})(nil),
"glusterfs": *(map[string]interface{})(nil),
"persistentVolumeClaim": *(map[string]interface{})(nil),
"rbd": *(map[string]interface{})(nil),
"flexVolume": *(map[string]interface{})(nil),
"cinder": *(map[string]interface{})(nil),
"cephFS": *(map[string]interface{})(nil),
"flocker": *(map[string]interface{})(nil),
"fc": *(map[string]interface{})(nil),
}
podspec_chart_value = map[string]interface{}{
"containers": []map[string]interface{}{container_chart_value},
"dnsPolicy": "ClusterFirst",
"imagePullSecrets": []map[string]interface{}{localobjectreference_chart_value},
"restartPolicy": "Always",
"securityContext": map[string]interface{}{},
"serviceAccountName": "",
"terminationGracePeriodSeconds": 30,
"volumes": []map[string]interface{}{volume_chart_value},
}
deployment_chart_value = map[string]interface{}{
"metadata": metadata_chart_value,
"spec": map[string]interface{}{
"replicas": 1,
"strategy": "RollingUpdate",
"template": map[string]interface{}{
"metadata": metadata_chart_value,
"spec": podspec_chart_value,
},
},
}
)