d5fc7e9320
site overlays are place in sysconfdir/overlays and take precedence over distribution overlays with the same name. Every `wwctl overlay` command changing overlays will create an site overlay. distribution overlays can't be deleted or modified with wwctl. Signed-off-by: Christian Goll <cgoll@suse.com>
90 lines
2.8 KiB
Go
90 lines
2.8 KiB
Go
package overlay
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import (
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"fmt"
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"os"
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"path"
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"strings"
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"github.com/containers/storage/drivers/copy"
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warewulfconf "github.com/warewulf/warewulf/internal/pkg/config"
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"github.com/warewulf/warewulf/internal/pkg/util"
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"github.com/warewulf/warewulf/internal/pkg/wwlog"
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)
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/*
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Return the path for the base of the overlay, adds rootfs
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prefix in the overlay dir if this it exists
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*/
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func OverlaySourceDir(overlayName string) (overlaypath string, isSite bool) {
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controller := warewulfconf.Get()
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/* Assume using old style overlay dir without rootfs */
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overlaypath = path.Join(controller.Paths.Sysconfdir, "overlays", overlayName)
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if _, err := os.Stat(path.Join(overlaypath, "rootfs")); err == nil {
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/* rootfs exists, use it. */
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overlaypath = path.Join(overlaypath, "rootfs")
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}
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if _, err := os.Stat(overlaypath); err == nil {
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return overlaypath, true
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}
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overlaypath = path.Join(controller.Paths.WWOverlaydir, overlayName)
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if _, err := os.Stat(path.Join(overlaypath, "rootfs")); err == nil {
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/* rootfs exists, use it. */
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overlaypath = path.Join(overlaypath, "rootfs")
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}
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wwlog.Debug("found overlay %s in path: %s", overlayName, overlaypath)
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return overlaypath, false
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}
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// OverlayImage returns the full path to an overlay image based on the
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// context and the overlays contained in it.
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//
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// If a context is provided, the image file name is based on that
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// context name, in the form __{CONTEXT}__.
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//
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// If the context is empty ("") the image file name is a concatenated
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// list of the contained overlays joined by "-".
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//
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// If the context is empty and no overlays are specified, the empty
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// string is returned.
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func OverlayImage(nodeName string, context string, overlayNames []string) string {
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var name string
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if context != "" {
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if len(overlayNames) > 0 {
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wwlog.Debug("context(%v) and overlays(%v) specified: prioritizing context(%v)",
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context, overlayNames, context)
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}
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name = "__" + strings.ToUpper(context) + "__.img"
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} else if len(overlayNames) > 0 {
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name = strings.Join(overlayNames, "-") + ".img"
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} else {
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wwlog.Warn("unable to generate overlay image path: no context or overlays specified")
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return ""
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}
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conf := warewulfconf.Get()
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return path.Join(conf.Paths.OverlayProvisiondir(), nodeName, name)
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}
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type OverlayDoesNotExist struct {
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Name string
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}
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func (e *OverlayDoesNotExist) Error() string {
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return fmt.Sprintf("overlay %s does not exist", e.Name)
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}
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// Creates a site overlay from an existing overlay and give back
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// OverlayDoesNotExist error if distribution overlay doesn't exsist
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func CreateSiteOverlay(name string) (err error) {
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controller := warewulfconf.Get()
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distroPath := path.Join(controller.Paths.WWOverlaydir, name)
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sitePath := path.Join(controller.Paths.Sysconfdir, "overlays", name)
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if !util.IsDir(distroPath) {
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return &OverlayDoesNotExist{Name: name}
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}
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err = copy.DirCopy(distroPath, sitePath, copy.Content, true)
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return err
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}
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