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copy.go
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copy.go
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package copy
import (
"context"
"fmt"
"strings"
"github.com/jenkins-x-plugins/jx-gitops/pkg/rootcmd"
"github.com/jenkins-x/jx-helpers/v3/pkg/cobras/helper"
"github.com/jenkins-x/jx-helpers/v3/pkg/cobras/templates"
"github.com/jenkins-x/jx-helpers/v3/pkg/kube"
"github.com/jenkins-x/jx-helpers/v3/pkg/kube/jxenv"
"github.com/jenkins-x/jx-helpers/v3/pkg/options"
"github.com/jenkins-x/jx-logging/v3/pkg/log"
"github.com/pkg/errors"
"github.com/spf13/cobra"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/dynamic"
"k8s.io/client-go/kubernetes"
)
var (
cmdLong = templates.LongDesc(`
Copies kubernetes resources (by default confimaps) from a namespace to the current namespace
`)
cmdExample = templates.Examples(`
# copies the config map with named beer to a namespace
%s copy --name beer --to=foo
# copies config maps with a selector to a namespace
%s copy -l mylabel=something --to=foo
# copies resources matching a selector and kind
%s copy --kind ingresses -l mylabel=something --to=foo
`)
)
// Options the options for the command
type Options struct {
Namespace string
ToNamespace string
Group string
Version string
Kind string
Selector string
Name string
Query string
CreateNamespace bool
Count int
DynamicClient dynamic.Interface
KubeClient kubernetes.Interface
}
// NewCmdCopy creates a command object for the command
func NewCmdCopy() (*cobra.Command, *Options) {
o := &Options{}
cmd := &cobra.Command{
Use: "copy",
Short: "Copies resources (by default confimaps) with the given selector or name from a source namespace to a destination namespace",
Long: cmdLong,
Example: fmt.Sprintf(cmdExample, rootcmd.BinaryName, rootcmd.BinaryName, rootcmd.BinaryName),
Run: func(cmd *cobra.Command, args []string) {
err := o.Run()
helper.CheckErr(err)
},
}
cmd.Flags().StringVarP(&o.Namespace, "ns", "n", "", "the namespace to find the resources to copy. Defaults to the current namespace")
cmd.Flags().StringVarP(&o.ToNamespace, "to", "t", "", "the namespace to copy the secrets to")
cmd.Flags().StringVarP(&o.Group, "group", "g", "", "the API group such as 'apps' for Deployemnts")
cmd.Flags().StringVarP(&o.Version, "version", "", "v1", "the API version of the resources to copy")
cmd.Flags().StringVarP(&o.Kind, "kind", "k", "configmaps", "the kind name")
cmd.Flags().StringVarP(&o.Selector, "selector", "l", "", "the label selector to find the resources to copy")
cmd.Flags().StringVarP(&o.Name, "name", "", "", "the name of the resource to copy instead of a selector")
cmd.Flags().BoolVarP(&o.CreateNamespace, "create-namespace", "", false, "create the to Namespace if it does not already exist")
return cmd, o
}
// Run implements the command
func (o *Options) Run() error {
if o.ToNamespace == "" {
return options.MissingOption("to")
}
if o.Selector == "" && o.Name == "" {
return options.MissingOption("selector")
}
var err error
o.KubeClient, o.Namespace, err = kube.LazyCreateKubeClientAndNamespace(o.KubeClient, o.Namespace)
if err != nil {
return errors.Wrapf(err, "failed to create kube client")
}
o.DynamicClient, err = kube.LazyCreateDynamicClient(o.DynamicClient)
if err != nil {
return errors.Wrapf(err, "failed to create dynamic client")
}
if o.CreateNamespace {
err = jxenv.EnsureNamespaceCreated(o.KubeClient, o.ToNamespace, nil, nil)
if err != nil {
return errors.Wrapf(err, "failed to create namespace %s", o.ToNamespace)
}
}
ns := o.Namespace
selector := o.Selector
fieldSelector := ""
if o.Name != "" {
fieldSelector = "metadata.name=" + o.Name
}
versionResource := schema.GroupVersionResource{Group: o.Group, Version: o.Version, Resource: o.Kind}
resourceName := strings.TrimPrefix(o.Group+"/"+o.Version+"/"+o.Kind, "/")
ctx := context.Background()
resources, err := o.DynamicClient.Resource(versionResource).Namespace(o.Namespace).List(ctx, metav1.ListOptions{
LabelSelector: selector,
FieldSelector: fieldSelector,
})
query := ""
if selector != "" {
query = "selector " + selector
} else {
query = "fieldSelector " + fieldSelector
}
o.Query = query
if err != nil {
if apierrors.IsNotFound(err) {
log.Logger().Warnf("no %s in namespace %s with query %s", resourceName, ns, query)
return nil
}
return errors.Wrapf(err, "failed to find %s in namespace %s with query %s", resourceName, ns, query)
}
for i := range resources.Items {
r := resources.Items[i]
r.SetNamespace(o.ToNamespace)
r.SetResourceVersion("")
r.SetUID(types.UID(""))
_, err = o.DynamicClient.Resource(versionResource).Namespace(o.ToNamespace).Create(ctx, &r, metav1.CreateOptions{})
if err != nil {
return errors.Wrapf(err, "failed to copy %s %s to namespace %s", resourceName, r.GetName(), o.ToNamespace)
}
log.Logger().Infof("copied copied %s %s to namespace %s", resourceName, r.GetName(), o.ToNamespace)
o.Count++
}
if o.Count == 0 {
log.Logger().Infof("did not find any %s resources in namespace %s matching query %s", resourceName, o.Namespace, query)
}
return nil
}