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package system
import (
"fmt"
"os"
"strings"
"text/tabwriter"
"text/template"
"time"
"github.com/containers/common/pkg/report"
"github.com/containers/podman/v2/cmd/podman/registry"
"github.com/containers/podman/v2/cmd/podman/validate"
"github.com/containers/podman/v2/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 [options]",
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, entities.TunnelMode},
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
}
w := tabwriter.NewWriter(os.Stdout, 8, 2, 2, ' ', 0)
if dfOptions.Verbose {
return printVerbose(cmd, w, reports)
}
return printSummary(w, cmd, reports)
}
func printSummary(w *tabwriter.Writer, cmd *cobra.Command, reports *entities.SystemDfReport) error {
var (
dfSummaries []*dfSummary
active int
size, reclaimable int64
)
for _, i := range reports.Images {
if i.Containers > 0 {
active++
}
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++
} 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.ReclaimableSize
}
volumeSummary := dfSummary{
Type: "Local Volumes",
Total: len(reports.Volumes),
Active: activeVolumes,
size: volumesSize,
reclaimable: volumesReclaimable,
}
dfSummaries = append(dfSummaries, &volumeSummary)
// need to give un-exported fields
hdrs := report.Headers(dfSummary{}, map[string]string{
"Size": "SIZE",
"Reclaimable": "RECLAIMABLE",
})
row := "{{.Type}}\t{{.Total}}\t{{.Active}}\t{{.Size}}\t{{.Reclaimable}}\n"
if cmd.Flags().Changed("format") {
row = report.NormalizeFormat(dfOptions.Format)
}
row = "{{range . }}" + row + "{{end}}"
return writeTemplate(cmd, w, hdrs, row, dfSummaries)
}
func printVerbose(cmd *cobra.Command, w *tabwriter.Writer, reports *entities.SystemDfReport) error {
defer w.Flush()
// Images
fmt.Fprint(w, "Images space usage:\n\n")
// convert to dfImage for output
dfImages := make([]*dfImage, 0, len(reports.Images))
for _, d := range reports.Images {
dfImages = append(dfImages, &dfImage{SystemDfImageReport: d})
}
hdrs := report.Headers(entities.SystemDfImageReport{}, map[string]string{
"ImageID": "IMAGE ID",
"SharedSize": "SHARED SIZE",
"UniqueSize": "UNIQUE SIZE",
})
imageRow := "{{.Repository}}\t{{.Tag}}\t{{.ImageID}}\t{{.Created}}\t{{.Size}}\t{{.SharedSize}}\t{{.UniqueSize}}\t{{.Containers}}\n"
format := "{{range . }}" + imageRow + "{{end}}"
if err := writeTemplate(cmd, w, hdrs, format, dfImages); err != nil {
return nil
}
// Containers
fmt.Fprint(w, "\nContainers space usage:\n\n")
// convert to dfContainers for output
dfContainers := make([]*dfContainer, 0, len(reports.Containers))
for _, d := range reports.Containers {
dfContainers = append(dfContainers, &dfContainer{SystemDfContainerReport: d})
}
hdrs = report.Headers(entities.SystemDfContainerReport{}, map[string]string{
"ContainerID": "CONTAINER ID",
"LocalVolumes": "LOCAL VOLUMES",
"RWSize": "SIZE",
})
containerRow := "{{.ContainerID}}\t{{.Image}}\t{{.Command}}\t{{.LocalVolumes}}\t{{.RWSize}}\t{{.Created}}\t{{.Status}}\t{{.Names}}\n"
format = "{{range . }}" + containerRow + "{{end}}"
if err := writeTemplate(cmd, w, hdrs, format, dfContainers); err != nil {
return nil
}
// Volumes
fmt.Fprint(w, "\nLocal Volumes space usage:\n\n")
dfVolumes := make([]*dfVolume, 0, len(reports.Volumes))
// convert to dfVolume for output
for _, d := range reports.Volumes {
dfVolumes = append(dfVolumes, &dfVolume{SystemDfVolumeReport: d})
}
hdrs = report.Headers(entities.SystemDfVolumeReport{}, map[string]string{
"VolumeName": "VOLUME NAME",
})
volumeRow := "{{.VolumeName}}\t{{.Links}}\t{{.Size}}\n"
format = "{{range . }}" + volumeRow + "{{end}}"
return writeTemplate(cmd, w, hdrs, format, dfVolumes)
}
func writeTemplate(cmd *cobra.Command, w *tabwriter.Writer, hdrs []map[string]string, format string,
output interface{}) error {
defer w.Flush()
tmpl, err := template.New("df").Parse(format)
if err != nil {
return err
}
if !cmd.Flags().Changed("format") {
if err := tmpl.Execute(w, hdrs); err != nil {
return err
}
}
return tmpl.Execute(w, output)
}
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) RWSize() string {
return units.HumanSize(float64(d.SystemDfContainerReport.RWSize))
}
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)
}
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