115 lines
5.0 KiB
Go
115 lines
5.0 KiB
Go
package backup
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import (
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"context"
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"errors"
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"os"
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"path/filepath"
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"strings"
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"testing"
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)
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// R-1214: the second-drive copy runs in a memory-capped container ONLY for paths the controller and the Docker daemon
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// see identically (/mnt/…); every other path, a box with no readable image, and a container that cannot start keep the
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// plain in-process rsync; an rsync failure inside the container is an error, never a silent second copy.
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// RED-PROOF: with the tier2CappedPath guard removed, TestR1214_APathOutsideMntNeverGoesToDocker fails (the copy of a
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// controller-volume path would go to the container, where it is an EMPTY folder and `--delete` empties the copy);
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// with the capped branch removed, TestR1214_MntPathsAreCopiedCapped fails — both seen failing 2026-10-22.
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type cappedRec struct{ calls [][]string }
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func withSeams(t *testing.T, root string, img string, run func(args []string) ([]byte, int, error)) *cappedRec {
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t.Helper()
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rec := &cappedRec{}
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oldRoot, oldImg, oldRun, oldLog := tier2CappedRoot, tier2SelfImage, tier2RunCapped, tier2Logf
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tier2CappedRoot = root
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tier2SelfImage = func() string { return img }
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tier2RunCapped = func(_ context.Context, args []string) ([]byte, int, error) {
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rec.calls = append(rec.calls, args)
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return run(args)
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}
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tier2Logf = func(string, ...any) {}
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t.Cleanup(func() { tier2CappedRoot, tier2SelfImage, tier2RunCapped, tier2Logf = oldRoot, oldImg, oldRun, oldLog })
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return rec
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}
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func TestR1214_MntPathsAreCopiedCapped(t *testing.T) {
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root := t.TempDir() + "/"
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src, dst := filepath.Join(root, "drive1", "unit"), filepath.Join(root, "drive2", "unit")
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os.MkdirAll(src, 0755)
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rec := withSeams(t, root, "gitea.dooplex.hu/admin/felhom-controller:9.9.9", func([]string) ([]byte, int, error) { return nil, 0, nil })
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if err := rsyncMirror(src, dst); err != nil {
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t.Fatal(err)
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}
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if len(rec.calls) != 1 {
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t.Fatalf("docker calls = %d, want 1", len(rec.calls))
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}
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got := strings.Join(rec.calls[0], " ")
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for _, want := range []string{"run --rm", "--memory 512m", "--memory-swap 512m", "--network none",
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"-v " + src + ":" + src + ":ro", "-v " + dst + ":" + dst + " ", "--entrypoint rsync gitea.dooplex.hu/admin/felhom-controller:9.9.9 -a --delete " + src + "/ " + dst + "/"} {
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if !strings.Contains(got, want) {
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t.Fatalf("the capped copy lacks %q:\n%s", want, got)
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}
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}
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}
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func TestR1214_APathOutsideMntNeverGoesToDocker(t *testing.T) {
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root := t.TempDir() + "/"
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other := t.TempDir() // a path the daemon would see differently (the controller's own data volume)
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src, dst := filepath.Join(other, "unit"), filepath.Join(root, "drive2", "unit")
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os.MkdirAll(src, 0755)
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os.WriteFile(filepath.Join(src, "photo.jpg"), []byte("x"), 0644)
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rec := withSeams(t, root, "img", func([]string) ([]byte, int, error) { return nil, 0, nil })
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if err := rsyncMirror(src, dst); err != nil {
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t.Fatal(err)
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}
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if len(rec.calls) != 0 {
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t.Fatalf("a path outside %s went to the container: %v", root, rec.calls)
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}
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if _, err := os.Stat(filepath.Join(dst, "photo.jpg")); err != nil {
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t.Fatal("the plain copy did not run")
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}
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}
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func TestR1214_ANotStartedContainerFallsBackAnRsyncErrorDoesNot(t *testing.T) {
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root := t.TempDir() + "/"
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src, dst := filepath.Join(root, "a", "unit"), filepath.Join(root, "b", "unit")
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os.MkdirAll(src, 0755)
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os.WriteFile(filepath.Join(src, "f"), []byte("x"), 0644)
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withSeams(t, root, "img", func([]string) ([]byte, int, error) { return []byte("no such image"), 125, errors.New("exit 125") })
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if err := rsyncMirror(src, dst); err != nil {
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t.Fatalf("a container that cannot start must fall back to the plain copy: %v", err)
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}
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if _, err := os.Stat(filepath.Join(dst, "f")); err != nil {
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t.Fatal("the fallback copy did not run")
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}
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withSeams(t, root, "img", func([]string) ([]byte, int, error) { return []byte("rsync error"), 23, errors.New("exit 23") })
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if err := rsyncMirror(src, dst); err == nil {
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t.Fatal("an rsync failure inside the container must be an error")
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}
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withSeams(t, root, "", func([]string) ([]byte, int, error) { t.Fatal("no image → no container"); return nil, 0, nil })
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if err := rsyncMirror(src, dst); err != nil {
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t.Fatalf("no readable image → the plain copy: %v", err)
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}
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}
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// A symlink under the capped root that points elsewhere must never reach the container (the daemon would resolve it
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// somewhere else, and `--delete` would mirror that over the copy) — the security review's case.
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// RED-PROOF: with the EvalSymlinks check removed, this fails — seen failing 2026-10-22.
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func TestR1214_ASymlinkedPathNeverGoesToDocker(t *testing.T) {
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root := t.TempDir() + "/"
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elsewhere := t.TempDir()
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os.WriteFile(filepath.Join(elsewhere, "f"), []byte("x"), 0644)
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link := filepath.Join(root, "drive1", "unit")
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os.MkdirAll(filepath.Dir(link), 0755)
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if err := os.Symlink(elsewhere, link); err != nil {
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t.Fatal(err)
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}
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rec := withSeams(t, root, "img", func([]string) ([]byte, int, error) { return nil, 0, nil })
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if err := rsyncMirror(link, filepath.Join(root, "drive2", "unit")); err != nil {
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t.Fatal(err)
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}
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if len(rec.calls) != 0 {
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t.Fatalf("a symlinked path went to the container: %v", rec.calls)
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}
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}
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