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Change unsupported snapshot warnings to INFO

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Since there is no real action the user can do, these can safely be
informative that the underlying filesystem does not support a snapshot
plugin at boot.

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
This commit is contained in:
Michael Crosby 2018-10-26 12:44:14 -04:00
parent c4446665cb
commit 16aaf6c065
3 changed files with 90 additions and 83 deletions
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8
services/server/server.go
View File

@ -125,7 +125,7 @@ func New(ctx context.Context, config *srvconfig.Config) (*Server, error) {
instance, err := result.Instance() instance, err := result.Instance()
if err != nil { if err != nil {
if plugin.IsSkipPlugin(err) { if plugin.IsSkipPlugin(err) {
log.G(ctx).WithField("type", p.Type).Infof("skip loading plugin %q...", id) log.G(ctx).WithError(err).WithField("type", p.Type).Infof("skip loading plugin %q...", id)
} else { } else {
log.G(ctx).WithError(err).Warnf("failed to load plugin %s", id) log.G(ctx).WithError(err).Warnf("failed to load plugin %s", id)
} }
@ -251,8 +251,10 @@ func LoadPlugins(ctx context.Context, config *srvconfig.Config) ([]*plugin.Regis
for name, sn := range snapshottersRaw { for name, sn := range snapshottersRaw {
sn, err := sn.Instance() sn, err := sn.Instance()
if err != nil { if err != nil {
log.G(ic.Context).WithError(err). if !plugin.IsSkipPlugin(err) {
Warnf("could not use snapshotter %v in metadata plugin", name) log.G(ic.Context).WithError(err).
Warnf("could not use snapshotter %v in metadata plugin", name)
}
continue continue
} }
snapshotters[name] = sn.(snapshots.Snapshotter) snapshotters[name] = sn.(snapshots.Snapshotter)

2
snapshots/btrfs/btrfs.go
View File

@ -77,7 +77,7 @@ func NewSnapshotter(root string) (snapshots.Snapshotter, error) {
return nil, err return nil, err
} }
if mnt.FSType != "btrfs" { if mnt.FSType != "btrfs" {
return nil, fmt.Errorf("path %s must be a btrfs filesystem to be used with the btrfs snapshotter", root) return nil, errors.Wrapf(plugin.ErrSkipPlugin, "path %s must be a btrfs filesystem to be used with the btrfs snapshotter", root)
} }
var ( var (
active = filepath.Join(root, "active") active = filepath.Join(root, "active")

163
snapshots/testsuite/testsuite.go
View File

@ -64,7 +64,7 @@ func SnapshotterSuite(t *testing.T, name string, snapshotterFn func(ctx context.
t.Run("CloseTwice", makeTest(name, snapshotterFn, closeTwice)) t.Run("CloseTwice", makeTest(name, snapshotterFn, closeTwice))
t.Run("RootPermission", makeTest(name, snapshotterFn, checkRootPermission)) t.Run("RootPermission", makeTest(name, snapshotterFn, checkRootPermission))
t.Run("128LayersMount", makeTest(name, snapshotterFn, check128LayersMount)) t.Run("128LayersMount", makeTest(name, snapshotterFn, check128LayersMount(name)))
} }
func makeTest(name string, snapshotterFn func(ctx context.Context, root string) (snapshots.Snapshotter, func() error, error), fn func(ctx context.Context, t *testing.T, snapshotter snapshots.Snapshotter, work string)) func(t *testing.T) { func makeTest(name string, snapshotterFn func(ctx context.Context, root string) (snapshots.Snapshotter, func() error, error), fn func(ctx context.Context, t *testing.T, snapshotter snapshots.Snapshotter, work string)) func(t *testing.T) {
@ -863,93 +863,98 @@ func checkRootPermission(ctx context.Context, t *testing.T, snapshotter snapshot
} }
} }
func check128LayersMount(ctx context.Context, t *testing.T, snapshotter snapshots.Snapshotter, work string) { func check128LayersMount(name string) func(ctx context.Context, t *testing.T, snapshotter snapshots.Snapshotter, work string) {
lowestApply := fstest.Apply( return func(ctx context.Context, t *testing.T, snapshotter snapshots.Snapshotter, work string) {
fstest.CreateFile("/bottom", []byte("way at the bottom\n"), 0777), if name == "Aufs" {
fstest.CreateFile("/overwriteme", []byte("FIRST!\n"), 0777), t.Skip("aufs tests have issues with whiteouts here on some CI kernels")
fstest.CreateDir("/ADDHERE", 0755), }
fstest.CreateDir("/ONLYME", 0755), lowestApply := fstest.Apply(
fstest.CreateFile("/ONLYME/bottom", []byte("bye!\n"), 0777), fstest.CreateFile("/bottom", []byte("way at the bottom\n"), 0777),
) fstest.CreateFile("/overwriteme", []byte("FIRST!\n"), 0777),
fstest.CreateDir("/ADDHERE", 0755),
appliers := []fstest.Applier{lowestApply}
for i := 1; i <= 127; i++ {
appliers = append(appliers, fstest.Apply(
fstest.CreateFile("/overwriteme", []byte(fmt.Sprintf("%d WAS HERE!\n", i)), 0777),
fstest.CreateFile(fmt.Sprintf("/ADDHERE/file-%d", i), []byte("same\n"), 0755),
fstest.RemoveAll("/ONLYME"),
fstest.CreateDir("/ONLYME", 0755), fstest.CreateDir("/ONLYME", 0755),
fstest.CreateFile(fmt.Sprintf("/ONLYME/file-%d", i), []byte("only me!\n"), 0777), fstest.CreateFile("/ONLYME/bottom", []byte("bye!\n"), 0777),
)) )
}
flat := filepath.Join(work, "flat") appliers := []fstest.Applier{lowestApply}
if err := os.MkdirAll(flat, 0777); err != nil { for i := 1; i <= 127; i++ {
t.Fatalf("failed to create flat dir(%s): %+v", flat, err) appliers = append(appliers, fstest.Apply(
} fstest.CreateFile("/overwriteme", []byte(fmt.Sprintf("%d WAS HERE!\n", i)), 0777),
fstest.CreateFile(fmt.Sprintf("/ADDHERE/file-%d", i), []byte("same\n"), 0755),
// NOTE: add gc labels to avoid snapshots get removed by gc... fstest.RemoveAll("/ONLYME"),
parent := "" fstest.CreateDir("/ONLYME", 0755),
for i, applier := range appliers { fstest.CreateFile(fmt.Sprintf("/ONLYME/file-%d", i), []byte("only me!\n"), 0777),
preparing := filepath.Join(work, fmt.Sprintf("prepare-layer-%d", i)) ))
if err := os.MkdirAll(preparing, 0777); err != nil {
t.Fatalf("[layer %d] failed to create preparing dir(%s): %+v", i, preparing, err)
} }
mounts, err := snapshotter.Prepare(ctx, preparing, parent, opt) flat := filepath.Join(work, "flat")
if err := os.MkdirAll(flat, 0777); err != nil {
t.Fatalf("failed to create flat dir(%s): %+v", flat, err)
}
// NOTE: add gc labels to avoid snapshots get removed by gc...
parent := ""
for i, applier := range appliers {
preparing := filepath.Join(work, fmt.Sprintf("prepare-layer-%d", i))
if err := os.MkdirAll(preparing, 0777); err != nil {
t.Fatalf("[layer %d] failed to create preparing dir(%s): %+v", i, preparing, err)
}
mounts, err := snapshotter.Prepare(ctx, preparing, parent, opt)
if err != nil {
t.Fatalf("[layer %d] failed to get mount info: %+v", i, err)
}
if err := mount.All(mounts, preparing); err != nil {
t.Fatalf("[layer %d] failed to mount on the target(%s): %+v", i, preparing, err)
}
if err := fstest.CheckDirectoryEqual(preparing, flat); err != nil {
testutil.Unmount(t, preparing)
t.Fatalf("[layer %d] preparing doesn't equal to flat before apply: %+v", i, err)
}
if err := applier.Apply(flat); err != nil {
testutil.Unmount(t, preparing)
t.Fatalf("[layer %d] failed to apply on flat dir: %+v", i, err)
}
if err = applier.Apply(preparing); err != nil {
testutil.Unmount(t, preparing)
t.Fatalf("[layer %d] failed to apply on preparing dir: %+v", i, err)
}
if err := fstest.CheckDirectoryEqual(preparing, flat); err != nil {
testutil.Unmount(t, preparing)
t.Fatalf("[layer %d] preparing doesn't equal to flat after apply: %+v", i, err)
}
testutil.Unmount(t, preparing)
parent = filepath.Join(work, fmt.Sprintf("committed-%d", i))
if err := snapshotter.Commit(ctx, parent, preparing, opt); err != nil {
t.Fatalf("[layer %d] failed to commit the preparing: %+v", i, err)
}
}
view := filepath.Join(work, "fullview")
if err := os.MkdirAll(view, 0777); err != nil {
t.Fatalf("failed to create fullview dir(%s): %+v", view, err)
}
mounts, err := snapshotter.View(ctx, view, parent, opt)
if err != nil { if err != nil {
t.Fatalf("[layer %d] failed to get mount info: %+v", i, err) t.Fatalf("failed to get view's mount info: %+v", err)
} }
if err := mount.All(mounts, preparing); err != nil { if err := mount.All(mounts, view); err != nil {
t.Fatalf("[layer %d] failed to mount on the target(%s): %+v", i, preparing, err) t.Fatalf("failed to mount on the target(%s): %+v", view, err)
} }
defer testutil.Unmount(t, view)
if err := fstest.CheckDirectoryEqual(preparing, flat); err != nil { if err := fstest.CheckDirectoryEqual(view, flat); err != nil {
testutil.Unmount(t, preparing) t.Fatalf("fullview should equal to flat: %+v", err)
t.Fatalf("[layer %d] preparing doesn't equal to flat before apply: %+v", i, err)
} }
if err := applier.Apply(flat); err != nil {
testutil.Unmount(t, preparing)
t.Fatalf("[layer %d] failed to apply on flat dir: %+v", i, err)
}
if err = applier.Apply(preparing); err != nil {
testutil.Unmount(t, preparing)
t.Fatalf("[layer %d] failed to apply on preparing dir: %+v", i, err)
}
if err := fstest.CheckDirectoryEqual(preparing, flat); err != nil {
testutil.Unmount(t, preparing)
t.Fatalf("[layer %d] preparing doesn't equal to flat after apply: %+v", i, err)
}
testutil.Unmount(t, preparing)
parent = filepath.Join(work, fmt.Sprintf("committed-%d", i))
if err := snapshotter.Commit(ctx, parent, preparing, opt); err != nil {
t.Fatalf("[layer %d] failed to commit the preparing: %+v", i, err)
}
}
view := filepath.Join(work, "fullview")
if err := os.MkdirAll(view, 0777); err != nil {
t.Fatalf("failed to create fullview dir(%s): %+v", view, err)
}
mounts, err := snapshotter.View(ctx, view, parent, opt)
if err != nil {
t.Fatalf("failed to get view's mount info: %+v", err)
}
if err := mount.All(mounts, view); err != nil {
t.Fatalf("failed to mount on the target(%s): %+v", view, err)
}
defer testutil.Unmount(t, view)
if err := fstest.CheckDirectoryEqual(view, flat); err != nil {
t.Fatalf("fullview should equal to flat: %+v", err)
} }
} }