Fix image deletion conflicts with search

Removed images were not cleaned up from the
digest-set that is used for the search index.

Fixes #18437

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

image/store.go

@@ -212,6 +212,9 @@ func (is *store) Delete(id ID) ([]layer.Metadata, error) {
 		delete(is.images[parent].children, id)
 	}
 
+	if err := is.digestSet.Remove(digest.Digest(id)); err != nil {
+		logrus.Errorf("error removing %s from digest set: %q", id, err)
+	}
 	delete(is.images, id)
 	is.fs.Delete(id)
 

image/store_test.go

@@ -194,6 +194,45 @@ func TestAddDelete(t *testing.T) {
 
 }
 
+func TestSearchAfterDelete(t *testing.T) {
+	tmpdir, err := ioutil.TempDir("", "images-fs-store")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tmpdir)
+	fs, err := NewFSStoreBackend(tmpdir)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	is, err := NewImageStore(fs, &mockLayerGetReleaser{})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	id, err := is.Create([]byte(`{"comment": "abc", "rootfs": {"type": "layers"}}`))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	id1, err := is.Search(string(id)[:15])
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if actual, expected := id1, id; expected != actual {
+		t.Fatalf("wrong id returned from search: expected %q, got %q", expected, actual)
+	}
+
+	if _, err := is.Delete(id); err != nil {
+		t.Fatal(err)
+	}
+
+	if _, err := is.Search(string(id)[:15]); err == nil {
+		t.Fatal("expected search after deletion to fail")
+	}
+}
+
 type mockLayerGetReleaser struct{}
 
 func (ls *mockLayerGetReleaser) Get(layer.ChainID) (layer.Layer, error) {

integration-cli/docker_cli_inspect_test.go

@@ -348,11 +348,11 @@ func (s *DockerSuite) TestInspectByPrefix(c *check.C) {
 	c.Assert(err, checker.IsNil)
 	c.Assert(id, checker.HasPrefix, "sha256:")
 
-	id2, err := inspectField(id[:10], "Id")
+	id2, err := inspectField(id[:12], "Id")
 	c.Assert(err, checker.IsNil)
 	c.Assert(id, checker.Equals, id2)
 
-	id3, err := inspectField(strings.TrimPrefix(id, "sha256:")[:10], "Id")
+	id3, err := inspectField(strings.TrimPrefix(id, "sha256:")[:12], "Id")
 	c.Assert(err, checker.IsNil)
 	c.Assert(id, checker.Equals, id3)
 }