80 lines
2.4 KiB
Go
80 lines
2.4 KiB
Go
package common
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import (
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"context"
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"fmt"
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"log"
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"math"
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"os"
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"github.com/hashicorp/packer/helper/multistep"
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"github.com/hashicorp/packer/packer"
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)
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// This step compacts the virtual disk for the VM unless the "skip_compaction"
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// boolean is true.
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//
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// Uses:
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// driver Driver
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// disk_full_paths ([]string) - The full paths to all created disks
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// ui packer.Ui
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//
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// Produces:
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// <nothing>
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type StepCompactDisk struct {
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Skip bool
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}
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func (s StepCompactDisk) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
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driver := state.Get("driver").(Driver)
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ui := state.Get("ui").(packer.Ui)
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diskFullPaths := state.Get("disk_full_paths").([]string)
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if s.Skip {
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log.Println("Skipping disk compaction step...")
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return multistep.ActionContinue
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}
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ui.Say("Compacting all attached virtual disks...")
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for i, diskFullPath := range diskFullPaths {
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ui.Message(fmt.Sprintf("Compacting virtual disk %d", i+1))
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// Get the file size of the virtual disk prior to compaction
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fi, err := os.Stat(diskFullPath)
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if err != nil {
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state.Put("error", fmt.Errorf("Error getting virtual disk file info pre compaction: %s", err))
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return multistep.ActionHalt
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}
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diskFileSizeStart := fi.Size()
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// Defragment and compact the disk
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if err := driver.CompactDisk(diskFullPath); err != nil {
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state.Put("error", fmt.Errorf("Error compacting disk: %s", err))
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return multistep.ActionHalt
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}
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// Get the file size of the virtual disk post compaction
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fi, err = os.Stat(diskFullPath)
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if err != nil {
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state.Put("error", fmt.Errorf("Error getting virtual disk file info post compaction: %s", err))
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return multistep.ActionHalt
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}
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diskFileSizeEnd := fi.Size()
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// Report compaction results
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log.Printf("Before compaction the disk file size was: %d", diskFileSizeStart)
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log.Printf("After compaction the disk file size was: %d", diskFileSizeEnd)
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if diskFileSizeStart > 0 {
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percentChange := ((float64(diskFileSizeEnd) / float64(diskFileSizeStart)) * 100.0) - 100.0
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switch {
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case percentChange < 0:
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ui.Message(fmt.Sprintf("Compacting reduced the disk file size by %.2f%%", math.Abs(percentChange)))
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case percentChange == 0:
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ui.Message(fmt.Sprintf("The compacting operation left the disk file size unchanged"))
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case percentChange > 0:
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ui.Message(fmt.Sprintf("WARNING: Compacting increased the disk file size by %.2f%%", percentChange))
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}
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}
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}
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return multistep.ActionContinue
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}
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func (StepCompactDisk) Cleanup(multistep.StateBag) {}
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