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load.go
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load.go
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package load
import (
"fmt"
"os"
"path/filepath"
"github.com/kyokomi/emoji"
"github.com/pkg/errors"
"github.com/spf13/cobra"
"sigs.k8s.io/kind/pkg/cluster/nodeutils"
"sigs.k8s.io/kind/pkg/exec"
"sigs.k8s.io/kind/pkg/fs"
"github.com/criticalstack/crit/internal/cinder/cluster"
"github.com/criticalstack/crit/internal/cinder/utils"
)
var opts struct {
Name string
Image string
Config string
Kubeconfig string
Verbose bool
}
func NewCommand() *cobra.Command {
cmd := &cobra.Command{
Use: "load",
Short: "Load container images from host",
Args: cobra.ExactArgs(1),
SilenceErrors: true,
SilenceUsage: true,
RunE: func(cmd *cobra.Command, args []string) (reterr error) {
imageName := args[0]
imageID, err := cluster.ImageID(imageName)
if err != nil {
return errors.Errorf("image: %q not present locally", imageName)
}
fmt.Printf("Host image found:\n Name:%q\n ID: %q\n", imageName, imageID)
nodes, err := cluster.ListNodes(opts.Name)
if err != nil {
return err
}
if len(nodes) == 0 {
return errors.Errorf("cannot find nodes for a cluster with the name %q", opts.Name)
}
fmt.Printf("\nLoading image into %d node(s) ...\n", len(nodes))
dir, err := fs.TempDir("", "image-tar")
if err != nil {
return errors.Wrap(err, "failed to create tempdir")
}
defer func() {
if err := utils.NewStep("Cleaning up", ":broom:", opts.Verbose, func() (err error) {
return os.RemoveAll(dir)
}); err != nil {
reterr = err
}
}()
imageTarPath := filepath.Join(dir, "image.tar")
if err := utils.NewStep("Preparing host image", ":optical_disk:", opts.Verbose, func() (err error) {
return exec.Command("docker", "save", "-o", imageTarPath, imageName).Run()
}); err != nil {
return err
}
for _, node := range nodes {
id, err := nodeutils.ImageID(node.Node, imageName)
if err == nil || id == imageID {
emoji.Printf(" :package: Image already loaded on node %q\n", node.String())
continue
}
if err := utils.NewStep(fmt.Sprintf("Loading image on node %q", node.String()), ":package:", opts.Verbose, func() (err error) {
return node.LoadImage(imageTarPath)
}); err != nil {
return err
}
}
return nil
},
}
cmd.Flags().StringVar(&opts.Name, "name", "cinder", "cluster name")
cmd.Flags().BoolVarP(&opts.Verbose, "verbose", "v", false, "show verbose output")
return cmd
}