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move overlay-checks to an overlayutils package

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This allows using the utilities without importing the whole
snapshotter.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn 2021-03-15 19:10:32 +01:00
parent a1138182d5
commit ba8f9845ec
No known key found for this signature in database
GPG Key ID: 76698F39D527CE8C
5 changed files with 13 additions and 11 deletions
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6
archive/tar_linux_test.go
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@ -31,7 +31,7 @@ import (
"github.com/containerd/containerd/log/logtest" "github.com/containerd/containerd/log/logtest"
"github.com/containerd/containerd/mount" "github.com/containerd/containerd/mount"
"github.com/containerd/containerd/pkg/testutil" "github.com/containerd/containerd/pkg/testutil"
"github.com/containerd/containerd/snapshots/overlay" "github.com/containerd/containerd/snapshots/overlay/overlayutils"
"github.com/containerd/continuity/fs" "github.com/containerd/continuity/fs"
"github.com/containerd/continuity/fs/fstest" "github.com/containerd/continuity/fs/fstest"
"github.com/pkg/errors" "github.com/pkg/errors"
@ -46,7 +46,7 @@ func TestOverlayApply(t *testing.T) {
} }
defer os.RemoveAll(base) defer os.RemoveAll(base)
if err := overlay.Supported(base); err != nil { if err := overlayutils.Supported(base); err != nil {
t.Skipf("skipping because overlay is not supported %v", err) t.Skipf("skipping because overlay is not supported %v", err)
} }
fstest.FSSuite(t, overlayDiffApplier{ fstest.FSSuite(t, overlayDiffApplier{
@ -65,7 +65,7 @@ func TestOverlayApplyNoParents(t *testing.T) {
} }
defer os.RemoveAll(base) defer os.RemoveAll(base)
if err := overlay.Supported(base); err != nil { if err := overlayutils.Supported(base); err != nil {
t.Skipf("skipping because overlay is not supported %v", err) t.Skipf("skipping because overlay is not supported %v", err)
} }
fstest.FSSuite(t, overlayDiffApplier{ fstest.FSSuite(t, overlayDiffApplier{

3
snapshots/overlay/overlay.go
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@ -30,6 +30,7 @@ import (
"github.com/containerd/containerd/log" "github.com/containerd/containerd/log"
"github.com/containerd/containerd/mount" "github.com/containerd/containerd/mount"
"github.com/containerd/containerd/snapshots" "github.com/containerd/containerd/snapshots"
"github.com/containerd/containerd/snapshots/overlay/overlayutils"
"github.com/containerd/containerd/snapshots/storage" "github.com/containerd/containerd/snapshots/storage"
"github.com/containerd/continuity/fs" "github.com/containerd/continuity/fs"
"github.com/pkg/errors" "github.com/pkg/errors"
@ -98,7 +99,7 @@ func NewSnapshotter(root string, opts ...Opt) (snapshots.Snapshotter, error) {
} }
// figure out whether "userxattr" option is recognized by the kernel && needed // figure out whether "userxattr" option is recognized by the kernel && needed
userxattr, err := NeedsUserXAttr(root) userxattr, err := overlayutils.NeedsUserXAttr(root)
if err != nil { if err != nil {
logrus.WithError(err).Warnf("cannot detect whether \"userxattr\" option needs to be used, assuming to be %v", userxattr) logrus.WithError(err).Warnf("cannot detect whether \"userxattr\" option needs to be used, assuming to be %v", userxattr)
} }

5
snapshots/overlay/overlay_test.go
View File

@ -30,6 +30,7 @@ import (
"github.com/containerd/containerd/mount" "github.com/containerd/containerd/mount"
"github.com/containerd/containerd/pkg/testutil" "github.com/containerd/containerd/pkg/testutil"
"github.com/containerd/containerd/snapshots" "github.com/containerd/containerd/snapshots"
"github.com/containerd/containerd/snapshots/overlay/overlayutils"
"github.com/containerd/containerd/snapshots/storage" "github.com/containerd/containerd/snapshots/storage"
"github.com/containerd/containerd/snapshots/testsuite" "github.com/containerd/containerd/snapshots/testsuite"
) )
@ -177,7 +178,7 @@ func testOverlayOverlayMount(t *testing.T, newSnapshotter testsuite.SnapshotterF
expected := []string{ expected := []string{
"index=off", "index=off",
} }
if userxattr, err := NeedsUserXAttr(root); err != nil { if userxattr, err := overlayutils.NeedsUserXAttr(root); err != nil {
t.Fatal(err) t.Fatal(err)
} else if userxattr { } else if userxattr {
expected = append(expected, "userxattr") expected = append(expected, "userxattr")
@ -346,7 +347,7 @@ func testOverlayView(t *testing.T, newSnapshotter testsuite.SnapshotterFunc) {
} }
expectedOptions := 2 expectedOptions := 2
userxattr, err := NeedsUserXAttr(root) userxattr, err := overlayutils.NeedsUserXAttr(root)
if err != nil { if err != nil {
t.Fatal(err) t.Fatal(err)
} }

8
snapshots/overlay/check.go → snapshots/overlay/overlayutils/check.go
View File

@ -16,7 +16,7 @@
limitations under the License. limitations under the License.
*/ */
package overlay package overlayutils
import ( import (
"fmt" "fmt"
@ -31,14 +31,14 @@ import (
"github.com/pkg/errors" "github.com/pkg/errors"
) )
// supportsMultipleLowerDir checks if the system supports multiple lowerdirs, // SupportsMultipleLowerDir checks if the system supports multiple lowerdirs,
// which is required for the overlay snapshotter. On 4.x kernels, multiple lowerdirs // which is required for the overlay snapshotter. On 4.x kernels, multiple lowerdirs
// are always available (so this check isn't needed), and backported to RHEL and // are always available (so this check isn't needed), and backported to RHEL and
// CentOS 3.x kernels (3.10.0-693.el7.x86_64 and up). This function is to detect // CentOS 3.x kernels (3.10.0-693.el7.x86_64 and up). This function is to detect
// support on those kernels, without doing a kernel version compare. // support on those kernels, without doing a kernel version compare.
// //
// Ported from moby overlay2. // Ported from moby overlay2.
func supportsMultipleLowerDir(d string) error { func SupportsMultipleLowerDir(d string) error {
td, err := ioutil.TempDir(d, "multiple-lowerdir-check") td, err := ioutil.TempDir(d, "multiple-lowerdir-check")
if err != nil { if err != nil {
return err return err
@ -85,7 +85,7 @@ func Supported(root string) error {
if !supportsDType { if !supportsDType {
return fmt.Errorf("%s does not support d_type. If the backing filesystem is xfs, please reformat with ftype=1 to enable d_type support", root) return fmt.Errorf("%s does not support d_type. If the backing filesystem is xfs, please reformat with ftype=1 to enable d_type support", root)
} }
return supportsMultipleLowerDir(root) return SupportsMultipleLowerDir(root)
} }
// NeedsUserXAttr returns whether overlayfs should be mounted with the "userxattr" mount option. // NeedsUserXAttr returns whether overlayfs should be mounted with the "userxattr" mount option.

2
snapshots/overlay/check_test.go → snapshots/overlay/overlayutils/check_test.go
View File

@ -16,7 +16,7 @@
limitations under the License. limitations under the License.
*/ */
package overlay package overlayutils
import ( import (
"io/ioutil" "io/ioutil"