From 2a43fcf786a989862f732c829fa754b881cc8be7 Mon Sep 17 00:00:00 2001 From: Valentin Rothberg Date: Mon, 17 May 2021 11:38:28 +0200 Subject: image prune: remove unused images only with `--all` Fix a regression in `podman image prune` where unused images were accidentally removed even when `--all=false`. Extend and partially rewrite the e2e tests to make sure we're not regressing again in the future. Fixing the aforementioned issue revealed another issue in the default prune filter. While prune should remove all "dangling" images (i.e., those without tag), it removed only "intermediate" ones; dangling images without children. Remove the mistaken comment from the libimage migration. Also clarify the help message and man page. Fixes: #10350 Signed-off-by: Valentin Rothberg --- pkg/domain/infra/abi/images.go | 30 +++++++----------------------- 1 file changed, 7 insertions(+), 23 deletions(-) (limited to 'pkg/domain/infra') diff --git a/pkg/domain/infra/abi/images.go b/pkg/domain/infra/abi/images.go index 0364b00a3..79e815490 100644 --- a/pkg/domain/infra/abi/images.go +++ b/pkg/domain/infra/abi/images.go @@ -40,25 +40,13 @@ func (ir *ImageEngine) Exists(_ context.Context, nameOrID string) (*entities.Boo } func (ir *ImageEngine) Prune(ctx context.Context, opts entities.ImagePruneOptions) ([]*reports.PruneReport, error) { - // NOTE: the terms "dangling" and "intermediate" are not used - // consistently across our code base. In libimage, "dangling" means - // that an image has no tags. "intermediate" means that an image is - // dangling and that no other image depends on it (i.e., has no - // children). - // - // While pruning usually refers to "dangling" images, it has always - // removed "intermediate" ones. - defaultOptions := &libimage.RemoveImagesOptions{ - Filters: append(opts.Filter, "intermediate=true", "containers=false", "readonly=false"), + pruneOptions := &libimage.RemoveImagesOptions{ + Filters: append(opts.Filter, "containers=false", "readonly=false"), WithSize: true, } - // `image prune --all` means to *also* remove images which are not in - // use by any container. Since image filters are chained, we need to - // do two look ups since the default ones are a subset of all. - unusedOptions := &libimage.RemoveImagesOptions{ - Filters: append(opts.Filter, "containers=false", "readonly=false"), - WithSize: true, + if !opts.All { + pruneOptions.Filters = append(pruneOptions.Filters, "dangling=true") } var pruneReports []*reports.PruneReport @@ -66,16 +54,12 @@ func (ir *ImageEngine) Prune(ctx context.Context, opts entities.ImagePruneOption // Now prune all images until we converge. numPreviouslyRemovedImages := 1 for { - removedDefault, rmErrors := ir.Libpod.LibimageRuntime().RemoveImages(ctx, nil, defaultOptions) - if rmErrors != nil { - return nil, errorhandling.JoinErrors(rmErrors) - } - removedUnused, rmErrors := ir.Libpod.LibimageRuntime().RemoveImages(ctx, nil, unusedOptions) + removedImages, rmErrors := ir.Libpod.LibimageRuntime().RemoveImages(ctx, nil, pruneOptions) if rmErrors != nil { return nil, errorhandling.JoinErrors(rmErrors) } - for _, rmReport := range append(removedDefault, removedUnused...) { + for _, rmReport := range removedImages { r := *rmReport pruneReports = append(pruneReports, &reports.PruneReport{ Id: r.ID, @@ -83,7 +67,7 @@ func (ir *ImageEngine) Prune(ctx context.Context, opts entities.ImagePruneOption }) } - numRemovedImages := len(removedDefault) + len(removedUnused) + numRemovedImages := len(removedImages) if numRemovedImages+numPreviouslyRemovedImages == 0 { break } -- cgit v1.2.3-54-g00ecf