DockerCLI/command/formatter/disk_usage.go

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package formatter
import (
"bytes"
"fmt"
"strings"
"text/template"
"github.com/docker/distribution/reference"
"github.com/docker/docker/api/types"
units "github.com/docker/go-units"
)
const (
defaultDiskUsageImageTableFormat = "table {{.Repository}}\t{{.Tag}}\t{{.ID}}\t{{.CreatedSince}} ago\t{{.VirtualSize}}\t{{.SharedSize}}\t{{.UniqueSize}}\t{{.Containers}}"
defaultDiskUsageContainerTableFormat = "table {{.ID}}\t{{.Image}}\t{{.Command}}\t{{.LocalVolumes}}\t{{.Size}}\t{{.RunningFor}} ago\t{{.Status}}\t{{.Names}}"
defaultDiskUsageVolumeTableFormat = "table {{.Name}}\t{{.Links}}\t{{.Size}}"
defaultDiskUsageTableFormat = "table {{.Type}}\t{{.TotalCount}}\t{{.Active}}\t{{.Size}}\t{{.Reclaimable}}"
typeHeader = "TYPE"
totalHeader = "TOTAL"
activeHeader = "ACTIVE"
reclaimableHeader = "RECLAIMABLE"
containersHeader = "CONTAINERS"
sharedSizeHeader = "SHARED SIZE"
uniqueSizeHeader = "UNIQUE SiZE"
)
// DiskUsageContext contains disk usage specific information required by the formatter, encapsulate a Context struct.
type DiskUsageContext struct {
Context
Verbose bool
LayersSize int64
Images []*types.ImageSummary
Containers []*types.Container
Volumes []*types.Volume
}
func (ctx *DiskUsageContext) startSubsection(format string) (*template.Template, error) {
ctx.buffer = bytes.NewBufferString("")
ctx.header = ""
ctx.Format = Format(format)
ctx.preFormat()
return ctx.parseFormat()
}
func (ctx *DiskUsageContext) Write() {
if ctx.Verbose == false {
ctx.buffer = bytes.NewBufferString("")
ctx.Format = defaultDiskUsageTableFormat
ctx.preFormat()
tmpl, err := ctx.parseFormat()
if err != nil {
return
}
err = ctx.contextFormat(tmpl, &diskUsageImagesContext{
totalSize: ctx.LayersSize,
images: ctx.Images,
})
if err != nil {
return
}
err = ctx.contextFormat(tmpl, &diskUsageContainersContext{
containers: ctx.Containers,
})
if err != nil {
return
}
err = ctx.contextFormat(tmpl, &diskUsageVolumesContext{
volumes: ctx.Volumes,
})
if err != nil {
return
}
diskUsageContainersCtx := diskUsageContainersContext{containers: []*types.Container{}}
diskUsageContainersCtx.header = map[string]string{
"Type": typeHeader,
"TotalCount": totalHeader,
"Active": activeHeader,
"Size": sizeHeader,
"Reclaimable": reclaimableHeader,
}
ctx.postFormat(tmpl, &diskUsageContainersCtx)
return
}
// First images
tmpl, err := ctx.startSubsection(defaultDiskUsageImageTableFormat)
if err != nil {
return
}
ctx.Output.Write([]byte("Images space usage:\n\n"))
for _, i := range ctx.Images {
repo := "<none>"
tag := "<none>"
if len(i.RepoTags) > 0 && !isDangling(*i) {
// Only show the first tag
ref, err := reference.ParseNormalizedNamed(i.RepoTags[0])
if err != nil {
continue
}
if nt, ok := ref.(reference.NamedTagged); ok {
repo = reference.FamiliarName(ref)
tag = nt.Tag()
}
}
err = ctx.contextFormat(tmpl, &imageContext{
repo: repo,
tag: tag,
trunc: true,
i: *i,
})
if err != nil {
return
}
}
ctx.postFormat(tmpl, newImageContext())
// Now containers
ctx.Output.Write([]byte("\nContainers space usage:\n\n"))
tmpl, err = ctx.startSubsection(defaultDiskUsageContainerTableFormat)
if err != nil {
return
}
for _, c := range ctx.Containers {
// Don't display the virtual size
c.SizeRootFs = 0
err = ctx.contextFormat(tmpl, &containerContext{
trunc: true,
c: *c,
})
if err != nil {
return
}
}
ctx.postFormat(tmpl, newContainerContext())
// And volumes
ctx.Output.Write([]byte("\nLocal Volumes space usage:\n\n"))
tmpl, err = ctx.startSubsection(defaultDiskUsageVolumeTableFormat)
if err != nil {
return
}
for _, v := range ctx.Volumes {
err = ctx.contextFormat(tmpl, &volumeContext{
v: *v,
})
if err != nil {
return
}
}
ctx.postFormat(tmpl, newVolumeContext())
}
type diskUsageImagesContext struct {
HeaderContext
totalSize int64
images []*types.ImageSummary
}
func (c *diskUsageImagesContext) MarshalJSON() ([]byte, error) {
return marshalJSON(c)
}
func (c *diskUsageImagesContext) Type() string {
return "Images"
}
func (c *diskUsageImagesContext) TotalCount() string {
return fmt.Sprintf("%d", len(c.images))
}
func (c *diskUsageImagesContext) Active() string {
used := 0
for _, i := range c.images {
if i.Containers > 0 {
used++
}
}
return fmt.Sprintf("%d", used)
}
func (c *diskUsageImagesContext) Size() string {
return units.HumanSize(float64(c.totalSize))
}
func (c *diskUsageImagesContext) Reclaimable() string {
var used int64
for _, i := range c.images {
if i.Containers != 0 {
if i.VirtualSize == -1 || i.SharedSize == -1 {
continue
}
used += i.VirtualSize - i.SharedSize
}
}
reclaimable := c.totalSize - used
if c.totalSize > 0 {
return fmt.Sprintf("%s (%v%%)", units.HumanSize(float64(reclaimable)), (reclaimable*100)/c.totalSize)
}
return fmt.Sprintf("%s", units.HumanSize(float64(reclaimable)))
}
type diskUsageContainersContext struct {
HeaderContext
verbose bool
containers []*types.Container
}
func (c *diskUsageContainersContext) MarshalJSON() ([]byte, error) {
return marshalJSON(c)
}
func (c *diskUsageContainersContext) Type() string {
return "Containers"
}
func (c *diskUsageContainersContext) TotalCount() string {
return fmt.Sprintf("%d", len(c.containers))
}
func (c *diskUsageContainersContext) isActive(container types.Container) bool {
return strings.Contains(container.State, "running") ||
strings.Contains(container.State, "paused") ||
strings.Contains(container.State, "restarting")
}
func (c *diskUsageContainersContext) Active() string {
used := 0
for _, container := range c.containers {
if c.isActive(*container) {
used++
}
}
return fmt.Sprintf("%d", used)
}
func (c *diskUsageContainersContext) Size() string {
var size int64
for _, container := range c.containers {
size += container.SizeRw
}
return units.HumanSize(float64(size))
}
func (c *diskUsageContainersContext) Reclaimable() string {
var reclaimable int64
var totalSize int64
for _, container := range c.containers {
if !c.isActive(*container) {
reclaimable += container.SizeRw
}
totalSize += container.SizeRw
}
if totalSize > 0 {
return fmt.Sprintf("%s (%v%%)", units.HumanSize(float64(reclaimable)), (reclaimable*100)/totalSize)
}
return fmt.Sprintf("%s", units.HumanSize(float64(reclaimable)))
}
type diskUsageVolumesContext struct {
HeaderContext
verbose bool
volumes []*types.Volume
}
func (c *diskUsageVolumesContext) MarshalJSON() ([]byte, error) {
return marshalJSON(c)
}
func (c *diskUsageVolumesContext) Type() string {
return "Local Volumes"
}
func (c *diskUsageVolumesContext) TotalCount() string {
return fmt.Sprintf("%d", len(c.volumes))
}
func (c *diskUsageVolumesContext) Active() string {
used := 0
for _, v := range c.volumes {
if v.UsageData.RefCount > 0 {
used++
}
}
return fmt.Sprintf("%d", used)
}
func (c *diskUsageVolumesContext) Size() string {
var size int64
for _, v := range c.volumes {
if v.UsageData.Size != -1 {
size += v.UsageData.Size
}
}
return units.HumanSize(float64(size))
}
func (c *diskUsageVolumesContext) Reclaimable() string {
var reclaimable int64
var totalSize int64
for _, v := range c.volumes {
if v.UsageData.Size != -1 {
if v.UsageData.RefCount == 0 {
reclaimable += v.UsageData.Size
}
totalSize += v.UsageData.Size
}
}
if totalSize > 0 {
return fmt.Sprintf("%s (%v%%)", units.HumanSize(float64(reclaimable)), (reclaimable*100)/totalSize)
}
return fmt.Sprintf("%s", units.HumanSize(float64(reclaimable)))
}