v2 system subcommand

add system df, info, load, renumber, and migrate

Refactor for specialized libpod engines

add the ability to prune images, volumes, containers, and pods

Signed-off-by: baude <bbaude@redhat.com>

1 files changed, 282 insertions, 0 deletions

diff --git a/cmd/podman/system/df.go b/cmd/podman/system/df.go
new file mode 100644
index 000000000..7caa8e39a
--- /dev/null
+++ b/cmd/podman/system/df.go
@@ -0,0 +1,282 @@
+package system
+
+import (
+	"fmt"
+	"html/template"
+	"io"
+	"os"
+	"strings"
+	"text/tabwriter"
+	"time"
+
+	"github.com/containers/libpod/cmd/podman/registry"
+	"github.com/containers/libpod/cmd/podman/validate"
+	"github.com/containers/libpod/pkg/domain/entities"
+	"github.com/docker/go-units"
+	"github.com/spf13/cobra"
+)
+
+var (
+	dfSystemDescription = `
+	podman system df
+
+	Show podman disk usage
+	`
+	dfSystemCommand = &cobra.Command{
+		Use:   "df",
+		Args:  validate.NoArgs,
+		Short: "Show podman disk usage",
+		Long:  dfSystemDescription,
+		RunE:  df,
+	}
+)
+
+var (
+	dfOptions entities.SystemDfOptions
+)
+
+func init() {
+	registry.Commands = append(registry.Commands, registry.CliCommand{
+		Mode:    []entities.EngineMode{entities.ABIMode},
+		Command: dfSystemCommand,
+		Parent:  systemCmd,
+	})
+	flags := dfSystemCommand.Flags()
+	flags.BoolVarP(&dfOptions.Verbose, "verbose", "v", false, "Show detailed information on disk usage")
+	flags.StringVar(&dfOptions.Format, "format", "", "Pretty-print images using a Go template")
+}
+
+func df(cmd *cobra.Command, args []string) error {
+	reports, err := registry.ContainerEngine().SystemDf(registry.Context(), dfOptions)
+	if err != nil {
+		return err
+	}
+	if dfOptions.Verbose {
+		return printVerbose(reports)
+	}
+	return printSummary(reports, dfOptions.Format)
+}
+
+func printSummary(reports *entities.SystemDfReport, userFormat string) error {
+
+	var (
+		dfSummaries       []*dfSummary
+		active            int
+		size, reclaimable int64
+		format            string    = "{{.Type}}\t{{.Total}}\t{{.Active}}\t{{.Size}}\t{{.Reclaimable}}\n"
+		w                 io.Writer = os.Stdout
+	)
+
+	//	Images
+	if len(userFormat) > 0 {
+		format = userFormat
+	}
+
+	for _, i := range reports.Images {
+		if i.Containers > 0 {
+			active += 1
+		}
+		size += i.Size
+		if i.Containers < 1 {
+			reclaimable += i.Size
+		}
+	}
+
+	imageSummary := dfSummary{
+		Type:        "Images",
+		Total:       len(reports.Images),
+		Active:      active,
+		size:        size,
+		reclaimable: reclaimable,
+	}
+	dfSummaries = append(dfSummaries, &imageSummary)
+
+	// Containers
+
+	var (
+		conActive               int
+		conSize, conReclaimable int64
+	)
+	for _, c := range reports.Containers {
+		if c.Status == "running" {
+			conActive += 1
+		} else {
+			conReclaimable += c.RWSize
+		}
+		conSize += c.RWSize
+	}
+
+	containerSummary := dfSummary{
+		Type:        "Containers",
+		Total:       len(reports.Containers),
+		Active:      conActive,
+		size:        conSize,
+		reclaimable: conReclaimable,
+	}
+
+	dfSummaries = append(dfSummaries, &containerSummary)
+
+	// Volumes
+	var (
+		activeVolumes                   int
+		volumesSize, volumesReclaimable int64
+	)
+
+	for _, v := range reports.Volumes {
+		activeVolumes += v.Links
+		volumesSize += v.Size
+		volumesReclaimable += v.Size
+	}
+	volumeSummary := dfSummary{
+		Type:        "Local Volumes",
+		Total:       len(reports.Volumes),
+		Active:      activeVolumes,
+		size:        volumesSize,
+		reclaimable: volumesReclaimable,
+	}
+
+	dfSummaries = append(dfSummaries, &volumeSummary)
+
+	headers := "TYPE\tTOTAL\tACTIVE\tSIZE\tRECLAIMABLE\n"
+	format = "{{range . }}" + format + "{{end}}"
+	if len(userFormat) == 0 {
+		format = headers + format
+	}
+	return writeTemplate(w, format, dfSummaries)
+}
+
+func printVerbose(reports *entities.SystemDfReport) error {
+	var (
+		dfImages     []*dfImage
+		dfContainers []*dfContainer
+		dfVolumes    []*dfVolume
+		w            io.Writer = os.Stdout
+	)
+
+	// Images
+	fmt.Print("\nImages space usage:\n\n")
+	// convert to dfImage for output
+	for _, d := range reports.Images {
+		dfImages = append(dfImages, &dfImage{SystemDfImageReport: d})
+	}
+	imageHeaders := "REPOSITORY\tTAG\tIMAGE ID\tCREATED\tSIZE\tSHARED SIZE\tUNIQUE SIZE\tCONTAINERS\n"
+	imageRow := "{{.Repository}}\t{{.Tag}}\t{{.ImageID}}\t{{.Created}}\t{{.Size}}\t{{.SharedSize}}\t{{.UniqueSize}}\t{{.Containers}}\n"
+	format := imageHeaders + "{{range . }}" + imageRow + "{{end}}"
+	if err := writeTemplate(w, format, dfImages); err != nil {
+		return nil
+	}
+
+	// Containers
+	fmt.Print("\nContainers space usage:\n\n")
+
+	// convert to dfContainers for output
+	for _, d := range reports.Containers {
+		dfContainers = append(dfContainers, &dfContainer{SystemDfContainerReport: d})
+	}
+	containerHeaders := "CONTAINER ID\tIMAGE\tCOMMAND\tLOCAL VOLUMES\tSIZE\tCREATED\tSTATUS\tNAMES\n"
+	containerRow := "{{.ContainerID}}\t{{.Image}}\t{{.Command}}\t{{.LocalVolumes}}\t{{.Size}}\t{{.Created}}\t{{.Status}}\t{{.Names}}\n"
+	format = containerHeaders + "{{range . }}" + containerRow + "{{end}}"
+	if err := writeTemplate(w, format, dfContainers); err != nil {
+		return nil
+	}
+
+	// Volumes
+	fmt.Print("\nLocal Volumes space usage:\n\n")
+
+	// convert to dfVolume for output
+	for _, d := range reports.Volumes {
+		dfVolumes = append(dfVolumes, &dfVolume{SystemDfVolumeReport: d})
+	}
+	volumeHeaders := "VOLUME NAME\tLINKS\tSIZE\n"
+	volumeRow := "{{.VolumeName}}\t{{.Links}}\t{{.Size}}\n"
+	format = volumeHeaders + "{{range . }}" + volumeRow + "{{end}}"
+	return writeTemplate(w, format, dfVolumes)
+}
+
+func writeTemplate(w io.Writer, format string, output interface{}) error {
+	tmpl, err := template.New("dfout").Parse(format)
+	if err != nil {
+		return err
+	}
+	w = tabwriter.NewWriter(w, 8, 2, 2, ' ', 0) //nolint
+	if err := tmpl.Execute(w, output); err != nil {
+		return err
+	}
+	if flusher, ok := w.(interface{ Flush() error }); ok {
+		return flusher.Flush()
+	}
+	return nil
+}
+
+type dfImage struct {
+	*entities.SystemDfImageReport
+}
+
+func (d *dfImage) ImageID() string {
+	return d.SystemDfImageReport.ImageID[0:12]
+}
+
+func (d *dfImage) Created() string {
+	return units.HumanDuration(time.Since(d.SystemDfImageReport.Created))
+}
+
+func (d *dfImage) Size() string {
+	return units.HumanSize(float64(d.SystemDfImageReport.Size))
+}
+
+func (d *dfImage) SharedSize() string {
+	return units.HumanSize(float64(d.SystemDfImageReport.SharedSize))
+}
+
+func (d *dfImage) UniqueSize() string {
+	return units.HumanSize(float64(d.SystemDfImageReport.UniqueSize))
+}
+
+type dfContainer struct {
+	*entities.SystemDfContainerReport
+}
+
+func (d *dfContainer) ContainerID() string {
+	return d.SystemDfContainerReport.ContainerID[0:12]
+}
+
+func (d *dfContainer) Image() string {
+	return d.SystemDfContainerReport.Image[0:12]
+}
+
+func (d *dfContainer) Command() string {
+	return strings.Join(d.SystemDfContainerReport.Command, " ")
+}
+
+func (d *dfContainer) Size() string {
+	return units.HumanSize(float64(d.SystemDfContainerReport.Size))
+}
+
+func (d *dfContainer) Created() string {
+	return units.HumanDuration(time.Since(d.SystemDfContainerReport.Created))
+}
+
+type dfVolume struct {
+	*entities.SystemDfVolumeReport
+}
+
+func (d *dfVolume) Size() string {
+	return units.HumanSize(float64(d.SystemDfVolumeReport.Size))
+}
+
+type dfSummary struct {
+	Type        string
+	Total       int
+	Active      int
+	size        int64
+	reclaimable int64
+}
+
+func (d *dfSummary) Size() string {
+	return units.HumanSize(float64(d.size))
+}
+
+func (d *dfSummary) Reclaimable() string {
+	percent := int(float64(d.reclaimable)/float64(d.size)) * 100
+	return fmt.Sprintf("%s (%d%%)", units.HumanSize(float64(d.reclaimable)), percent)
+}