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25ee00c494
pkg/system historically has been a bit of a kitchen-sink of things that were somewhat "system" related, but didn't have a good place for. EnsureRemoveAll() is one of those utilities. EnsureRemoveAll() is used to both unmount and remove a path, for which it depends on both github.com/moby/sys/mount, which in turn depends on github.com/moby/sys/mountinfo. pkg/system is imported in the CLI, but neither EnsureRemoveAll(), nor any of its moby/sys dependencies are used on the client side, so let's move this function somewhere else, to remove those dependencies from the CLI. I looked for plausible locations that were related; it's used in: - daemon - daemon/graphdriver/XXX/ - plugin I considered moving it into a (e.g.) "utils" package within graphdriver (but not a huge fan of "utils" packages), and given that it felt (mostly) related to cleaning up container filesystems, I decided to move it there. Some things to follow-up on after this: - Verify if this function is still needed (it feels a bit like a big hammer in a "YOLO, let's try some things just in case it fails") - Perhaps it should be integrated in `containerfs.Remove()` (so that it's used automatically) - Look if there's other implementations (and if they should be consolidated), although (e.g.) the one in containerd is a copy of ours: https://github.com/containerd/containerd/blob/v1.5.9/pkg/cri/server/helpers_linux.go#L200 Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
57 lines
1.1 KiB
Go
57 lines
1.1 KiB
Go
//go:build !darwin && !windows
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// +build !darwin,!windows
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package containerfs // import "github.com/docker/docker/pkg/containerfs"
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import (
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"os"
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"path/filepath"
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"testing"
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"time"
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"github.com/moby/sys/mount"
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)
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func TestEnsureRemoveAllWithMount(t *testing.T) {
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if os.Getuid() != 0 {
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t.Skip("skipping test that requires root")
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}
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dir1, err := os.MkdirTemp("", "test-ensure-removeall-with-dir1")
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if err != nil {
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t.Fatal(err)
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}
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dir2, err := os.MkdirTemp("", "test-ensure-removeall-with-dir2")
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(dir2)
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bindDir := filepath.Join(dir1, "bind")
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if err := os.MkdirAll(bindDir, 0755); err != nil {
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t.Fatal(err)
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}
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if err := mount.Mount(dir2, bindDir, "none", "bind"); err != nil {
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t.Fatal(err)
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}
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done := make(chan struct{}, 1)
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go func() {
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err = EnsureRemoveAll(dir1)
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close(done)
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}()
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select {
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case <-done:
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if err != nil {
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t.Fatal(err)
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}
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case <-time.After(5 * time.Second):
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t.Fatal("timeout waiting for EnsureRemoveAll to finish")
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}
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if _, err := os.Stat(dir1); !os.IsNotExist(err) {
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t.Fatalf("expected %q to not exist", dir1)
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}
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}
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