Updates around VNFS restructure and kernel restructure. More coming.

internal/pkg/vnfs_old/docker.go

@@ -0,0 +1,101 @@
+package vnfs
+
+import (
+	"context"
+	"fmt"
+	"github.com/hpcng/warewulf/internal/pkg/config"
+	"github.com/hpcng/warewulf/internal/pkg/oci"
+	"github.com/hpcng/warewulf/internal/pkg/wwlog"
+	"os"
+	"path"
+)
+
+func BuildDocker(vnfs VnfsObject, buildForce bool) {
+	wwlog.Printf(wwlog.VERBOSE, "Building OCI Container: %s\n", vnfs.Source)
+
+	OciCacheDir := config.LocalStateDir + "/oci"
+	VnfsHashDir := config.LocalStateDir + "/oci/vnfs"
+
+	c, err := oci.NewCache(oci.OptSetCachePath(OciCacheDir))
+	if err != nil {
+		fmt.Printf("ERROR: %s\n", err)
+		os.Exit(1)
+	}
+
+	wwlog.Printf(wwlog.VERBOSE, "Downloading OCI container layers\n")
+	sourcePath, err := c.Pull(context.Background(), vnfs.Source, nil)
+	if err != nil {
+		fmt.Printf("ERROR: %s\n", err)
+		os.Exit(1)
+	}
+
+	hashDestination := VnfsHashDir + path.Base(sourcePath)
+
+	name, err := os.Readlink(vnfs.Image)
+	if err == nil {
+		if name == hashDestination && buildForce == false {
+			wwlog.Printf(wwlog.INFO, "%-35s: Skipping, VNFS is current\n", vnfs.Name)
+			return
+		}
+	}
+
+	err = os.MkdirAll(VnfsHashDir, 0755)
+	if err != nil {
+		fmt.Printf("ERROR: %s\n", err)
+		return
+	}
+
+	wwlog.Printf(wwlog.DEBUG, "Making parent directory for: %s\n", vnfs.Image)
+	err = os.MkdirAll(path.Dir(vnfs.Image), 0755)
+	if err != nil {
+		fmt.Printf("ERROR: %s\n", err)
+		return
+	}
+
+	wwlog.Printf(wwlog.DEBUG, "Making parent directory for: %s\n", vnfs.Chroot)
+	err = os.MkdirAll(path.Dir(vnfs.Chroot), 0755)
+	if err != nil {
+		fmt.Printf("ERROR: %s\n", err)
+		return
+	}
+
+	wwlog.Printf(wwlog.VERBOSE, "Building bootable VNFS image\n")
+
+	err = buildVnfs(sourcePath, hashDestination)
+	if err != nil {
+		fmt.Printf("ERROR: %s\n", err)
+		os.Exit(1)
+	}
+
+	wwlog.Printf(wwlog.VERBOSE, "Finalizing Build\n")
+
+	// Setup links from OCI image to provision path
+	_ = os.Remove(vnfs.Image + "-link")
+	err = os.Symlink(hashDestination, vnfs.Image+"-link")
+	if err != nil {
+		wwlog.Printf(wwlog.ERROR, "Could not create symlink for Image: %s\n", err)
+		os.Exit(1)
+	}
+	err = os.Rename(vnfs.Image+"-link", vnfs.Image)
+	if err != nil {
+		wwlog.Printf(wwlog.ERROR, "Could not rename link: %s\n", err)
+		os.Exit(1)
+	}
+
+	// Setup links from OCI rootfs to chroot path
+	_ = os.Remove(vnfs.Chroot + "-link")
+	err = os.Symlink(sourcePath, vnfs.Chroot+"-link")
+	if err != nil {
+		wwlog.Printf(wwlog.ERROR, "Could not create symlink for Chroot: %s\n", err)
+		os.Exit(1)
+	}
+	err = os.Rename(vnfs.Chroot+"-link", vnfs.Chroot)
+	if err != nil {
+		wwlog.Printf(wwlog.ERROR, "Could not rename link: %s\n", err)
+		os.Exit(1)
+	}
+
+	wwlog.Printf(wwlog.INFO, "%-35s: Done\n", vnfs.Source)
+
+	return
+}