Exemple #1
0
// Snapshot create a btrfs snapshot of a subvolume.
func Snapshot(subvolumeDir string, snapshotDir string, readonly bool) error {
	// Check if the passed subvolume directory is a btrfs subvolume.
	if !IsSubvolume(subvolumeDir) {
		return fmt.Errorf("failed to create btrfs snapshot: the subvolume directory '%s' is not a btrfs subvolume!", subvolumeDir)
	}

	// The destination snapshot directory should not exist!
	e, err := utils.Exists(snapshotDir)
	if err != nil {
		return err
	} else if e {
		return fmt.Errorf("failed to create btrfs snapshot: the snapshot directory '%s' already exists!", snapshotDir)
	}

	// Create the snapshot directory.
	if readonly {
		err = utils.RunCommand("btrfs", "subvolume", "snapshot", "-r", subvolumeDir, snapshotDir)
	} else {
		err = utils.RunCommand("btrfs", "subvolume", "snapshot", subvolumeDir, snapshotDir)
	}
	if err != nil {
		return fmt.Errorf("failed to create btrfs snapshot '%s': %v", snapshotDir, err)
	}

	// Force changed blocks to disk, update the super block.
	err = utils.RunCommand("sync")
	if err != nil {
		return fmt.Errorf("failed to force changed blocks to disk, update the super block: %v", err)
	}

	return nil
}
Exemple #2
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// SetSubvolumeReadonly sets the readonly flag on a btrfs subvolume.
func SetSubvolumeReadonly(subvolumeDir string, readonly bool) error {
	// Run the command.
	err := utils.RunCommand("btrfs", "property", "set", "-ts", subvolumeDir, "ro", strconv.FormatBool(readonly))
	if err != nil {
		return fmt.Errorf("failed to set readonly flag of btrfs subvolume '%s': %v", subvolumeDir, err)
	}

	return nil
}
Exemple #3
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// DeleteSubvolume deletes a btrfs subvolume.
func DeleteSubvolume(subvolumeDir string) error {
	// Run the command.
	err := utils.RunCommand("btrfs", "subvolume", "delete", subvolumeDir)
	if err != nil {
		return fmt.Errorf("failed to delete the btrfs subvolume '%s': %v", subvolumeDir, err)
	}

	return nil
}
Exemple #4
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// IsSubvolume checks if the directory is a btrfs subvolume.
func IsSubvolume(subvolumeDir string) bool {
	// Run the command.
	err := utils.RunCommand("btrfs", "subvolume", "show", subvolumeDir)
	if err != nil {
		return false
	}

	return true
}
Exemple #5
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// Balance a btrfs partition.
func Balance(path string) error {
	// Run the command.
	err := utils.RunCommand("btrfs", "fi", "balance", "start", "-dusage="+strconv.Itoa(config.Config.BtrfsBalanceDusage), path)
	if err != nil {
		return fmt.Errorf("failed to balance btrfs path '%s': %v", path, err)
	}

	return nil
}
Exemple #6
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func taskFuncCloneSource(app *App) error {
	app.setState("cloning source")

	// Clone the source with git.
	err := utils.RunCommand("git", "clone", "-b", app.settings.Branch, "--single-branch", app.settings.SourceURL, app.SourceDirectoryPath())
	if err != nil {
		return fmt.Errorf("failed to clone application source with git: %v", err)
	}

	return nil
}