functions/docker/Find-OrphanDockerLayers.ps1
|
function Find-OrphanDockerLayers { param ( [switch]$RenameOrphanLayers ) # Original source: https://gist.github.com/olljanat/340b4033eb24d8d33ec75f2c3c3b6b3d If ($RenameOrphanLayers) { Write-Information "$($env:COMPUTERNAME) -RenameOrphanLayers option enabled, will rename all orphan layers" } # Get known layers on Docker images [array]$ImageDetails += docker images -q | ForEach-Object { docker inspect $_ | ConvertFrom-Json } ForEach ($Image in $ImageDetails) { $ImageLayer = $Image.GraphDriver.Data.dir [array]$ImageLayers += $ImageLayer $LayerChain = Get-Content "$ImageLayer\layerchain.json" If ($LayerChainFileContent -ne "null") { [array]$ImageParentLayers += $LayerChain | ConvertFrom-Json } } # Get known layes on Docker containers [array]$ContainerDetails = docker ps -a -q | ForEach-Object { docker inspect $_ | ConvertFrom-Json } ForEach ($Container in $ContainerDetails) { [array]$ContainerLayers += $Container.GraphDriver.Data.dir } # Get layers on disk $LayersOnDisk = (Get-ChildItem -Path C:\ProgramData\Docker\windowsfilter -Directory).FullName $ImageLayers += $ImageParentLayers $UniqueImageLayers = $ImageLayers | Select-Object -Unique [array]$KnownLayers = $UniqueImageLayers $KnownLayers += $ContainerLayers # Find orphan layers $OrphanLayersTotal = 0 ForEach ($Layer in $LayersOnDisk) { If ($KnownLayers -notcontains $Layer) { [array]$OrphanLayer += $Layer $LayerSize = (Get-ChildItem -Path $Layer -Recurse -ErrorAction:SilentlyContinue | Measure-Object -Property Length -Sum -ErrorAction Stop).Sum $OrphanLayersTotal += $LayerSize Write-Verbose "$($env:COMPUTERNAME) - Found orphan layer: $($Layer -Replace '\r\n','') with size: $(($LayerSize -Replace '\r\n','') / 1MB) MB" If (($RenameOrphanLayers) -and ($Layer -notlike "*-removing")) { $LayerNewPath = $Layer + "-removing" Rename-Item -Path $Layer -NewName $LayerNewPath } } } Write-Information "$($env:COMPUTERNAME) - Layers on disk: $($LayersOnDisk.count)" Write-Information "$($env:COMPUTERNAME) - Image layers: $($UniqueImageLayers.count)" Write-Information "$($env:COMPUTERNAME) - Container layers: $($ContainerLayers.count)" $OrphanLayersTotalMB = $OrphanLayersTotal / 1MB Write-Information "$($env:COMPUTERNAME) - Found $($OrphanLayer.count) orphan layers with total size $OrphanLayersTotalMB MB" } |