Update overlay snapshot driver to use metastore
Update tests to use boltdb. Update test suite to pass context. Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
This commit is contained in:
Derek McGowan
parent
63ea9908c0
commit
61b524aff2
|
|
@ -21,7 +21,7 @@ const (
|
|||
|
||||
func TestBtrfs(t *testing.T) {
|
||||
testutil.RequiresRoot(t)
|
||||
testsuite.SnapshotterSuite(t, "Btrfs", func(root string) (snapshot.Snapshotter, func(), error) {
|
||||
testsuite.SnapshotterSuite(t, "Btrfs", func(ctx context.Context, root string) (snapshot.Snapshotter, func(), error) {
|
||||
device := setupBtrfsLoopbackDevice(t, root)
|
||||
snapshotter, err := NewSnapshotter(device.deviceName, root)
|
||||
if err != nil {
|
||||
|
|
|
|||
|
|
@ -7,12 +7,13 @@ import (
|
|||
"os"
|
||||
"path/filepath"
|
||||
"strings"
|
||||
"sync"
|
||||
|
||||
"github.com/docker/containerd"
|
||||
"github.com/docker/containerd/log"
|
||||
"github.com/docker/containerd/plugin"
|
||||
"github.com/docker/containerd/snapshot"
|
||||
digest "github.com/opencontainers/go-digest"
|
||||
"github.com/docker/containerd/snapshot/storage"
|
||||
"github.com/docker/containerd/snapshot/storage/boltdb"
|
||||
"github.com/pkg/errors"
|
||||
)
|
||||
|
||||
|
|
@ -20,32 +21,40 @@ func init() {
|
|||
plugin.Register("snapshot-overlay", &plugin.Registration{
|
||||
Type: plugin.SnapshotPlugin,
|
||||
Init: func(ic *plugin.InitContext) (interface{}, error) {
|
||||
return NewSnapshotter(filepath.Join(ic.Root, "snapshot", "overlay"))
|
||||
root := filepath.Join(ic.Root, "snapshot", "overlay")
|
||||
ms, err := boltdb.NewMetaStore(ic.Context, filepath.Join(root, "metadata.db"))
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return NewSnapshotter(root, ms)
|
||||
},
|
||||
})
|
||||
}
|
||||
|
||||
type Snapshotter struct {
|
||||
root string
|
||||
links *cache
|
||||
root string
|
||||
ms storage.MetaStore
|
||||
}
|
||||
|
||||
func NewSnapshotter(root string) (snapshot.Snapshotter, error) {
|
||||
type activeSnapshot struct {
|
||||
id string
|
||||
name string
|
||||
parentID interface{}
|
||||
readonly bool
|
||||
}
|
||||
|
||||
func NewSnapshotter(root string, ms storage.MetaStore) (snapshot.Snapshotter, error) {
|
||||
if err := os.MkdirAll(root, 0700); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
for _, p := range []string{
|
||||
"committed", // committed snapshots
|
||||
"active", // active snapshots
|
||||
"index", // snapshots by hashed name
|
||||
} {
|
||||
if err := os.MkdirAll(filepath.Join(root, p), 0700); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if err := os.MkdirAll(filepath.Join(root, "snapshots"), 0700); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return &Snapshotter{
|
||||
root: root,
|
||||
links: newCache(),
|
||||
root: root,
|
||||
ms: ms,
|
||||
}, nil
|
||||
}
|
||||
|
||||
|
|
@ -55,86 +64,20 @@ func NewSnapshotter(root string) (snapshot.Snapshotter, error) {
|
|||
// Should be used for parent resolution, existence checks and to discern
|
||||
// the kind of snapshot.
|
||||
func (o *Snapshotter) Stat(ctx context.Context, key string) (snapshot.Info, error) {
|
||||
path, err := o.links.get(filepath.Join(o.root, "index", hash(key)))
|
||||
if err != nil {
|
||||
if !os.IsNotExist(err) {
|
||||
return snapshot.Info{}, err
|
||||
}
|
||||
|
||||
return snapshot.Info{}, errors.Errorf("snapshot %v not found", key)
|
||||
}
|
||||
|
||||
// TODO(stevvooe): We don't confirm the name to avoid the lookup cost.
|
||||
return o.stat(path)
|
||||
}
|
||||
|
||||
func (o *Snapshotter) stat(path string) (snapshot.Info, error) {
|
||||
ppath, err := o.links.get(filepath.Join(path, "parent"))
|
||||
if err != nil {
|
||||
if !os.IsNotExist(err) {
|
||||
return snapshot.Info{}, err
|
||||
}
|
||||
|
||||
// no parent
|
||||
}
|
||||
|
||||
kp, err := ioutil.ReadFile(filepath.Join(path, "name"))
|
||||
ctx, t, err := o.ms.TransactionContext(ctx, false)
|
||||
if err != nil {
|
||||
return snapshot.Info{}, err
|
||||
}
|
||||
|
||||
var parent string
|
||||
if ppath != "" {
|
||||
p, err := ioutil.ReadFile(filepath.Join(ppath, "name"))
|
||||
if err != nil {
|
||||
return snapshot.Info{}, err
|
||||
}
|
||||
parent = string(p)
|
||||
}
|
||||
|
||||
ro := true
|
||||
kind := snapshot.KindCommitted
|
||||
if strings.HasPrefix(path, filepath.Join(o.root, "active")) {
|
||||
// TODO(stevvooe): Maybe there is a better way?
|
||||
kind = snapshot.KindActive
|
||||
|
||||
// TODO(stevvooe): We haven't introduced this to overlay yet.
|
||||
// We'll add it when we add tests for it.
|
||||
ro = false
|
||||
}
|
||||
|
||||
return snapshot.Info{
|
||||
Name: string(kp),
|
||||
Parent: parent,
|
||||
Kind: kind,
|
||||
Readonly: ro,
|
||||
}, nil
|
||||
defer t.Rollback()
|
||||
return o.ms.Stat(ctx, key)
|
||||
}
|
||||
|
||||
func (o *Snapshotter) Prepare(ctx context.Context, key, parent string) ([]containerd.Mount, error) {
|
||||
active, err := o.newActiveDir(key, false)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if parent != "" {
|
||||
if err := active.setParent(parent); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
return active.mounts(o.links)
|
||||
return o.createActive(ctx, key, parent, false)
|
||||
}
|
||||
|
||||
func (o *Snapshotter) View(ctx context.Context, key, parent string) ([]containerd.Mount, error) {
|
||||
active, err := o.newActiveDir(key, true)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if parent != "" {
|
||||
if err := active.setParent(parent); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
return active.mounts(o.links)
|
||||
return o.createActive(ctx, key, parent, true)
|
||||
}
|
||||
|
||||
// Mounts returns the mounts for the transaction identified by key. Can be
|
||||
|
|
@ -142,263 +85,208 @@ func (o *Snapshotter) View(ctx context.Context, key, parent string) ([]container
|
|||
//
|
||||
// This can be used to recover mounts after calling View or Prepare.
|
||||
func (o *Snapshotter) Mounts(ctx context.Context, key string) ([]containerd.Mount, error) {
|
||||
active := o.getActive(key)
|
||||
return active.mounts(o.links)
|
||||
ctx, t, err := o.ms.TransactionContext(ctx, false)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
active, err := o.ms.GetActive(ctx, key)
|
||||
t.Rollback()
|
||||
if err != nil {
|
||||
return nil, errors.Wrap(err, "failed to get active mount")
|
||||
}
|
||||
return o.mounts(active), nil
|
||||
}
|
||||
|
||||
func (o *Snapshotter) Commit(ctx context.Context, name, key string) error {
|
||||
active := o.getActive(key)
|
||||
return active.commit(name, o.links)
|
||||
ctx, t, err := o.ms.TransactionContext(ctx, true)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if _, err := o.ms.Commit(ctx, key, name); err != nil {
|
||||
if rerr := t.Rollback(); rerr != nil {
|
||||
log.G(ctx).WithError(rerr).Warn("Failure rolling back transaction")
|
||||
}
|
||||
return errors.Wrap(err, "failed to commit snapshot")
|
||||
}
|
||||
return t.Commit()
|
||||
}
|
||||
|
||||
// Remove abandons the transaction identified by key. All resources
|
||||
// associated with the key will be removed.
|
||||
func (o *Snapshotter) Remove(ctx context.Context, key string) error {
|
||||
panic("not implemented")
|
||||
func (o *Snapshotter) Remove(ctx context.Context, key string) (err error) {
|
||||
ctx, t, err := o.ms.TransactionContext(ctx, true)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
defer func() {
|
||||
if err != nil && t != nil {
|
||||
if rerr := t.Rollback(); rerr != nil {
|
||||
log.G(ctx).WithError(rerr).Warn("Failure rolling back transaction")
|
||||
}
|
||||
}
|
||||
}()
|
||||
|
||||
id, err := o.ms.Remove(ctx, key)
|
||||
if err != nil {
|
||||
return errors.Wrap(err, "failed to remove")
|
||||
}
|
||||
|
||||
path := filepath.Join(o.root, "snapshots", id)
|
||||
renamed := filepath.Join(o.root, "snapshots", "rm-"+id)
|
||||
if err := os.Rename(path, renamed); err != nil {
|
||||
return errors.Wrap(err, "failed to rename")
|
||||
}
|
||||
|
||||
err = t.Commit()
|
||||
t = nil
|
||||
if err != nil {
|
||||
if err1 := os.Rename(renamed, path); err1 != nil {
|
||||
// May cause inconsistent data on disk
|
||||
log.G(ctx).WithError(err1).WithField("path", renamed).Errorf("Failed to rename after failed commit")
|
||||
}
|
||||
return errors.Wrap(err, "failed to commit")
|
||||
}
|
||||
if err := os.RemoveAll(renamed); err != nil {
|
||||
// Must be cleaned up, any "rm-*" could be removed if no active transactions
|
||||
log.G(ctx).WithError(err).WithField("path", renamed).Warnf("Failed to remove root filesystem")
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// Walk the committed snapshots.
|
||||
func (o *Snapshotter) Walk(ctx context.Context, fn func(context.Context, snapshot.Info) error) error {
|
||||
root := filepath.Join(o.root, "index")
|
||||
return filepath.Walk(root, func(path string, fi os.FileInfo, err error) error {
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if path == root {
|
||||
return nil
|
||||
}
|
||||
|
||||
if fi.Mode()&os.ModeSymlink == 0 {
|
||||
// only follow links
|
||||
return filepath.SkipDir
|
||||
}
|
||||
|
||||
target, err := o.links.get(path)
|
||||
if err != nil {
|
||||
if !os.IsNotExist(err) {
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
si, err := o.stat(target)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if err := fn(ctx, si); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
return nil
|
||||
})
|
||||
ctx, t, err := o.ms.TransactionContext(ctx, false)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
defer t.Rollback()
|
||||
return o.ms.Walk(ctx, fn)
|
||||
}
|
||||
|
||||
func (o *Snapshotter) newActiveDir(key string, readonly bool) (*activeDir, error) {
|
||||
func (o *Snapshotter) createActive(ctx context.Context, key, parent string, readonly bool) ([]containerd.Mount, error) {
|
||||
var (
|
||||
path = filepath.Join(o.root, "active", hash(key))
|
||||
name = filepath.Join(path, "name")
|
||||
indexlink = filepath.Join(o.root, "index", hash(key))
|
||||
path string
|
||||
snapshotDir = filepath.Join(o.root, "snapshots")
|
||||
)
|
||||
a := &activeDir{
|
||||
path: path,
|
||||
committedDir: filepath.Join(o.root, "committed"),
|
||||
indexlink: indexlink,
|
||||
|
||||
td, err := ioutil.TempDir(snapshotDir, "new-")
|
||||
if err != nil {
|
||||
return nil, errors.Wrap(err, "failed to create temp dir")
|
||||
}
|
||||
defer func() {
|
||||
if err != nil {
|
||||
if td != "" {
|
||||
if err1 := os.RemoveAll(td); err1 != nil {
|
||||
err = errors.Wrapf(err, "remove failed: %v", err1)
|
||||
}
|
||||
}
|
||||
if path != "" {
|
||||
if err1 := os.RemoveAll(path); err1 != nil {
|
||||
err = errors.Wrapf(err, "failed to remove path: %v", err1)
|
||||
}
|
||||
}
|
||||
}
|
||||
}()
|
||||
|
||||
if err = os.MkdirAll(filepath.Join(td, "fs"), 0700); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if !readonly {
|
||||
for _, p := range []string{
|
||||
"work",
|
||||
"fs",
|
||||
} {
|
||||
if err := os.MkdirAll(filepath.Join(path, p), 0700); err != nil {
|
||||
a.delete()
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
} else {
|
||||
if err := os.MkdirAll(filepath.Join(path, "fs"), 0700); err != nil {
|
||||
a.delete()
|
||||
if err = os.MkdirAll(filepath.Join(td, "work"), 0700); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
|
||||
if err := ioutil.WriteFile(name, []byte(key), 0644); err != nil {
|
||||
a.delete()
|
||||
ctx, t, err := o.ms.TransactionContext(ctx, true)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
// link from namespace
|
||||
if err := os.Symlink(path, indexlink); err != nil {
|
||||
a.delete()
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return a, nil
|
||||
}
|
||||
|
||||
func (o *Snapshotter) getActive(key string) *activeDir {
|
||||
return &activeDir{
|
||||
path: filepath.Join(o.root, "active", hash(key)),
|
||||
committedDir: filepath.Join(o.root, "committed"),
|
||||
indexlink: filepath.Join(o.root, "index", hash(key)),
|
||||
}
|
||||
}
|
||||
|
||||
func hash(k string) string {
|
||||
return digest.FromString(k).Hex()
|
||||
}
|
||||
|
||||
type activeDir struct {
|
||||
committedDir string
|
||||
path string
|
||||
indexlink string
|
||||
}
|
||||
|
||||
func (a *activeDir) delete() error {
|
||||
return os.RemoveAll(a.path)
|
||||
}
|
||||
|
||||
func (a *activeDir) setParent(name string) error {
|
||||
return os.Symlink(filepath.Join(a.committedDir, hash(name)), filepath.Join(a.path, "parent"))
|
||||
}
|
||||
|
||||
func (a *activeDir) commit(name string, c *cache) error {
|
||||
if _, err := os.Stat(filepath.Join(a.path, "fs")); err != nil {
|
||||
if os.IsNotExist(err) {
|
||||
return errors.New("cannot commit view")
|
||||
active, err := o.ms.CreateActive(ctx, key, parent, readonly)
|
||||
if err != nil {
|
||||
if rerr := t.Rollback(); rerr != nil {
|
||||
// TODO: log rollback error
|
||||
}
|
||||
return err
|
||||
return nil, errors.Wrap(err, "failed to create active")
|
||||
}
|
||||
|
||||
// TODO(stevvooe): This doesn't quite meet the current model. The new model
|
||||
// is to copy all of this out and let the transaction continue. We don't
|
||||
// really have tests for it yet, but this will be the spot to fix it.
|
||||
//
|
||||
// Nothing should be removed until remove is called on the active
|
||||
// transaction.
|
||||
if err := os.RemoveAll(filepath.Join(a.path, "work")); err != nil {
|
||||
return err
|
||||
path = filepath.Join(snapshotDir, active.ID)
|
||||
if err := os.Rename(td, path); err != nil {
|
||||
if rerr := t.Rollback(); rerr != nil {
|
||||
// TODO: log rollback error
|
||||
}
|
||||
return nil, errors.Wrap(err, "failed to rename")
|
||||
}
|
||||
td = ""
|
||||
|
||||
if err := t.Commit(); err != nil {
|
||||
return nil, errors.Wrap(err, "commit failed")
|
||||
}
|
||||
|
||||
if err := ioutil.WriteFile(filepath.Join(a.path, "name"), []byte(name), 0644); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
c.invalidate(a.path) // clears parent cache, since we end up moving.
|
||||
c.invalidate(filepath.Join(a.path, "parent"))
|
||||
c.invalidate(a.indexlink)
|
||||
|
||||
committed := filepath.Join(a.committedDir, hash(name))
|
||||
if err := os.Rename(a.path, committed); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if err := os.Remove(a.indexlink); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
indexlink := filepath.Join(filepath.Dir(a.indexlink), hash(name))
|
||||
return os.Symlink(committed, indexlink)
|
||||
return o.mounts(active), nil
|
||||
}
|
||||
|
||||
func (a *activeDir) mounts(c *cache) ([]containerd.Mount, error) {
|
||||
var (
|
||||
parents []string
|
||||
err error
|
||||
current = a.path
|
||||
)
|
||||
for {
|
||||
if current, err = c.get(filepath.Join(current, "parent")); err != nil {
|
||||
if os.IsNotExist(err) {
|
||||
break
|
||||
}
|
||||
|
||||
return nil, err
|
||||
}
|
||||
parents = append(parents, filepath.Join(current, "fs"))
|
||||
}
|
||||
if len(parents) == 0 {
|
||||
func (o *Snapshotter) mounts(active storage.Active) []containerd.Mount {
|
||||
if len(active.ParentIDs) == 0 {
|
||||
// if we only have one layer/no parents then just return a bind mount as overlay
|
||||
// will not work
|
||||
roFlag := "rw"
|
||||
if _, err := os.Stat(filepath.Join(a.path, "work")); err != nil {
|
||||
if !os.IsNotExist(err) {
|
||||
return nil, err
|
||||
}
|
||||
if active.Readonly {
|
||||
roFlag = "ro"
|
||||
}
|
||||
|
||||
return []containerd.Mount{
|
||||
{
|
||||
Source: filepath.Join(a.path, "fs"),
|
||||
Source: o.upperPath(active.ID),
|
||||
Type: "bind",
|
||||
Options: []string{
|
||||
roFlag,
|
||||
"rbind",
|
||||
},
|
||||
},
|
||||
}, nil
|
||||
}
|
||||
}
|
||||
var options []string
|
||||
|
||||
if _, err := os.Stat(filepath.Join(a.path, "work")); err == nil {
|
||||
if !active.Readonly {
|
||||
options = append(options,
|
||||
fmt.Sprintf("workdir=%s", filepath.Join(a.path, "work")),
|
||||
fmt.Sprintf("upperdir=%s", filepath.Join(a.path, "fs")),
|
||||
fmt.Sprintf("workdir=%s", o.workPath(active.ID)),
|
||||
fmt.Sprintf("upperdir=%s", o.upperPath(active.ID)),
|
||||
)
|
||||
} else if !os.IsNotExist(err) {
|
||||
return nil, err
|
||||
} else if len(parents) == 1 {
|
||||
} else if len(active.ParentIDs) == 1 {
|
||||
return []containerd.Mount{
|
||||
{
|
||||
Source: parents[0],
|
||||
Source: o.upperPath(active.ParentIDs[0]),
|
||||
Type: "bind",
|
||||
Options: []string{
|
||||
"ro",
|
||||
"rbind",
|
||||
},
|
||||
},
|
||||
}, nil
|
||||
}
|
||||
}
|
||||
|
||||
options = append(options, fmt.Sprintf("lowerdir=%s", strings.Join(parents, ":")))
|
||||
parentPaths := make([]string, len(active.ParentIDs))
|
||||
for i := range active.ParentIDs {
|
||||
parentPaths[i] = o.upperPath(active.ParentIDs[i])
|
||||
}
|
||||
|
||||
options = append(options, fmt.Sprintf("lowerdir=%s", strings.Join(parentPaths, ":")))
|
||||
return []containerd.Mount{
|
||||
{
|
||||
Type: "overlay",
|
||||
Source: "overlay",
|
||||
Options: options,
|
||||
},
|
||||
}, nil
|
||||
}
|
||||
|
||||
func newCache() *cache {
|
||||
return &cache{
|
||||
links: make(map[string]string),
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
type cache struct {
|
||||
mu sync.Mutex
|
||||
links map[string]string
|
||||
func (o *Snapshotter) upperPath(id string) string {
|
||||
return filepath.Join(o.root, "snapshots", id, "fs")
|
||||
}
|
||||
|
||||
func (c *cache) get(path string) (string, error) {
|
||||
c.mu.Lock()
|
||||
defer c.mu.Unlock()
|
||||
target, ok := c.links[path]
|
||||
if !ok {
|
||||
link, err := os.Readlink(path)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
c.links[path], target = link, link
|
||||
}
|
||||
return target, nil
|
||||
}
|
||||
|
||||
func (c *cache) invalidate(path string) {
|
||||
c.mu.Lock()
|
||||
defer c.mu.Unlock()
|
||||
|
||||
delete(c.links, path)
|
||||
func (o *Snapshotter) workPath(id string) string {
|
||||
return filepath.Join(o.root, "snapshots", id, "work")
|
||||
}
|
||||
|
|
|
|||
|
|
@ -11,20 +11,27 @@ import (
|
|||
|
||||
"github.com/docker/containerd"
|
||||
"github.com/docker/containerd/snapshot"
|
||||
"github.com/docker/containerd/snapshot/storage/boltdb"
|
||||
"github.com/docker/containerd/snapshot/testsuite"
|
||||
"github.com/docker/containerd/testutil"
|
||||
)
|
||||
|
||||
func boltSnapshotter(ctx context.Context, root string) (snapshot.Snapshotter, func(), error) {
|
||||
store, err := boltdb.NewMetaStore(ctx, filepath.Join(root, "metadata.db"))
|
||||
if err != nil {
|
||||
return nil, nil, err
|
||||
}
|
||||
snapshotter, err := NewSnapshotter(root, store)
|
||||
if err != nil {
|
||||
return nil, nil, err
|
||||
}
|
||||
|
||||
return snapshotter, func() {}, nil
|
||||
}
|
||||
|
||||
func TestOverlay(t *testing.T) {
|
||||
testutil.RequiresRoot(t)
|
||||
testsuite.SnapshotterSuite(t, "Overlay", func(root string) (snapshot.Snapshotter, func(), error) {
|
||||
snapshotter, err := NewSnapshotter(root)
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
||||
return snapshotter, func() {}, nil
|
||||
})
|
||||
testsuite.SnapshotterSuite(t, "Overlay", boltSnapshotter)
|
||||
}
|
||||
|
||||
func TestOverlayMounts(t *testing.T) {
|
||||
|
|
@ -34,7 +41,7 @@ func TestOverlayMounts(t *testing.T) {
|
|||
t.Fatal(err)
|
||||
}
|
||||
defer os.RemoveAll(root)
|
||||
o, err := NewSnapshotter(root)
|
||||
o, _, err := boltSnapshotter(ctx, root)
|
||||
if err != nil {
|
||||
t.Error(err)
|
||||
return
|
||||
|
|
@ -51,7 +58,7 @@ func TestOverlayMounts(t *testing.T) {
|
|||
if m.Type != "bind" {
|
||||
t.Errorf("mount type should be bind but received %q", m.Type)
|
||||
}
|
||||
expected := filepath.Join(root, "active", hash("/tmp/test"), "fs")
|
||||
expected := filepath.Join(root, "snapshots", "1", "fs")
|
||||
if m.Source != expected {
|
||||
t.Errorf("expected source %q but received %q", expected, m.Source)
|
||||
}
|
||||
|
|
@ -70,7 +77,7 @@ func TestOverlayCommit(t *testing.T) {
|
|||
t.Fatal(err)
|
||||
}
|
||||
defer os.RemoveAll(root)
|
||||
o, err := NewSnapshotter(root)
|
||||
o, _, err := boltSnapshotter(ctx, root)
|
||||
if err != nil {
|
||||
t.Error(err)
|
||||
return
|
||||
|
|
@ -99,7 +106,7 @@ func TestOverlayOverlayMount(t *testing.T) {
|
|||
t.Fatal(err)
|
||||
}
|
||||
defer os.RemoveAll(root)
|
||||
o, err := NewSnapshotter(root)
|
||||
o, _, err := boltSnapshotter(ctx, root)
|
||||
if err != nil {
|
||||
t.Error(err)
|
||||
return
|
||||
|
|
@ -129,11 +136,10 @@ func TestOverlayOverlayMount(t *testing.T) {
|
|||
t.Errorf("expected source %q but received %q", "overlay", m.Source)
|
||||
}
|
||||
var (
|
||||
ah = hash("/tmp/layer2")
|
||||
sh = hash("base")
|
||||
work = "workdir=" + filepath.Join(root, "active", ah, "work")
|
||||
upper = "upperdir=" + filepath.Join(root, "active", ah, "fs")
|
||||
lower = "lowerdir=" + filepath.Join(root, "committed", sh, "fs")
|
||||
bp = getBasePath(ctx, o, root, "/tmp/layer2")
|
||||
work = "workdir=" + filepath.Join(bp, "work")
|
||||
upper = "upperdir=" + filepath.Join(bp, "fs")
|
||||
lower = "lowerdir=" + getParents(ctx, o, root, "/tmp/layer2")[0]
|
||||
)
|
||||
for i, v := range []string{
|
||||
work,
|
||||
|
|
@ -146,6 +152,40 @@ func TestOverlayOverlayMount(t *testing.T) {
|
|||
}
|
||||
}
|
||||
|
||||
func getBasePath(ctx context.Context, sn snapshot.Snapshotter, root, key string) string {
|
||||
o := sn.(*Snapshotter)
|
||||
ctx, t, err := o.ms.TransactionContext(ctx, false)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
defer t.Rollback()
|
||||
|
||||
active, err := o.ms.GetActive(ctx, key)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
|
||||
return filepath.Join(root, "snapshots", active.ID)
|
||||
}
|
||||
|
||||
func getParents(ctx context.Context, sn snapshot.Snapshotter, root, key string) []string {
|
||||
o := sn.(*Snapshotter)
|
||||
ctx, t, err := o.ms.TransactionContext(ctx, false)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
defer t.Rollback()
|
||||
active, err := o.ms.GetActive(ctx, key)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
parents := make([]string, len(active.ParentIDs))
|
||||
for i := range active.ParentIDs {
|
||||
parents[i] = filepath.Join(root, "snapshots", active.ParentIDs[i], "fs")
|
||||
}
|
||||
return parents
|
||||
}
|
||||
|
||||
func TestOverlayOverlayRead(t *testing.T) {
|
||||
testutil.RequiresRoot(t)
|
||||
ctx := context.TODO()
|
||||
|
|
@ -154,7 +194,7 @@ func TestOverlayOverlayRead(t *testing.T) {
|
|||
t.Fatal(err)
|
||||
}
|
||||
defer os.RemoveAll(root)
|
||||
o, err := NewSnapshotter(root)
|
||||
o, _, err := boltSnapshotter(ctx, root)
|
||||
if err != nil {
|
||||
t.Error(err)
|
||||
return
|
||||
|
|
@ -206,7 +246,7 @@ func TestOverlayView(t *testing.T) {
|
|||
t.Fatal(err)
|
||||
}
|
||||
defer os.RemoveAll(root)
|
||||
o, err := NewSnapshotter(root)
|
||||
o, _, err := boltSnapshotter(ctx, root)
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
|
@ -228,7 +268,7 @@ func TestOverlayView(t *testing.T) {
|
|||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
if err := ioutil.WriteFile(filepath.Join(root, "active", hash(key), "fs", "foo"), []byte("hi, again"), 0660); err != nil {
|
||||
if err := ioutil.WriteFile(filepath.Join(getParents(ctx, o, root, "/tmp/top")[0], "foo"), []byte("hi, again"), 0660); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
if err := o.Commit(ctx, "top", key); err != nil {
|
||||
|
|
@ -246,7 +286,7 @@ func TestOverlayView(t *testing.T) {
|
|||
if m.Type != "bind" {
|
||||
t.Errorf("mount type should be bind but received %q", m.Type)
|
||||
}
|
||||
expected := filepath.Join(root, "committed", hash("base"), "fs")
|
||||
expected := getParents(ctx, o, root, "/tmp/view1")[0]
|
||||
if m.Source != expected {
|
||||
t.Errorf("expected source %q but received %q", expected, m.Source)
|
||||
}
|
||||
|
|
@ -274,7 +314,8 @@ func TestOverlayView(t *testing.T) {
|
|||
if len(m.Options) != 1 {
|
||||
t.Errorf("expected 1 mount option but got %d", len(m.Options))
|
||||
}
|
||||
expected = fmt.Sprintf("lowerdir=%s:%s", filepath.Join(root, "committed", hash("top"), "fs"), filepath.Join(root, "committed", hash("base"), "fs"))
|
||||
lowers := getParents(ctx, o, root, "/tmp/view2")
|
||||
expected = fmt.Sprintf("lowerdir=%s:%s", lowers[0], lowers[1])
|
||||
if m.Options[0] != expected {
|
||||
t.Errorf("expected option %q but received %q", expected, m.Options[0])
|
||||
}
|
||||
|
|
|
|||
|
|
@ -17,7 +17,7 @@ import (
|
|||
)
|
||||
|
||||
// SnapshotterSuite runs a test suite on the snapshotter given a factory function.
|
||||
func SnapshotterSuite(t *testing.T, name string, snapshotterFn func(root string) (snapshot.Snapshotter, func(), error)) {
|
||||
func SnapshotterSuite(t *testing.T, name string, snapshotterFn func(ctx context.Context, root string) (snapshot.Snapshotter, func(), error)) {
|
||||
t.Run("Basic", makeTest(t, name, snapshotterFn, checkSnapshotterBasic))
|
||||
t.Run("StatActive", makeTest(t, name, snapshotterFn, checkSnapshotterStatActive))
|
||||
t.Run("StatComitted", makeTest(t, name, snapshotterFn, checkSnapshotterStatCommitted))
|
||||
|
|
@ -25,8 +25,9 @@ func SnapshotterSuite(t *testing.T, name string, snapshotterFn func(root string)
|
|||
t.Run("PreareViewFailingtest", makeTest(t, name, snapshotterFn, checkSnapshotterPrepareView))
|
||||
}
|
||||
|
||||
func makeTest(t *testing.T, name string, snapshotterFn func(root string) (snapshot.Snapshotter, func(), error), fn func(t *testing.T, snapshotter snapshot.Snapshotter, work string)) func(t *testing.T) {
|
||||
func makeTest(t *testing.T, name string, snapshotterFn func(ctx context.Context, root string) (snapshot.Snapshotter, func(), error), fn func(ctx context.Context, t *testing.T, snapshotter snapshot.Snapshotter, work string)) func(t *testing.T) {
|
||||
return func(t *testing.T) {
|
||||
ctx := context.Background()
|
||||
oldumask := syscall.Umask(0)
|
||||
defer syscall.Umask(oldumask)
|
||||
// Make two directories: a snapshotter root and a play area for the tests:
|
||||
|
|
@ -46,7 +47,7 @@ func makeTest(t *testing.T, name string, snapshotterFn func(root string) (snapsh
|
|||
t.Fatal(err)
|
||||
}
|
||||
|
||||
snapshotter, cleanup, err := snapshotterFn(root)
|
||||
snapshotter, cleanup, err := snapshotterFn(ctx, root)
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
|
@ -58,14 +59,12 @@ func makeTest(t *testing.T, name string, snapshotterFn func(root string) (snapsh
|
|||
}
|
||||
|
||||
defer testutil.DumpDir(t, tmpDir)
|
||||
fn(t, snapshotter, work)
|
||||
fn(ctx, t, snapshotter, work)
|
||||
}
|
||||
}
|
||||
|
||||
// checkSnapshotterBasic tests the basic workflow of a snapshot snapshotter.
|
||||
func checkSnapshotterBasic(t *testing.T, snapshotter snapshot.Snapshotter, work string) {
|
||||
ctx := context.TODO()
|
||||
|
||||
func checkSnapshotterBasic(ctx context.Context, t *testing.T, snapshotter snapshot.Snapshotter, work string) {
|
||||
initialApplier := fstest.Apply(
|
||||
fstest.CreateFile("/foo", []byte("foo\n"), 0777),
|
||||
fstest.CreateDir("/a", 0755),
|
||||
|
|
@ -189,11 +188,15 @@ func checkSnapshotterBasic(t *testing.T, snapshotter snapshot.Snapshotter, work
|
|||
fstest.Apply(initialApplier, diffApplier)); err != nil {
|
||||
t.Fatalf("failure reason: %+v", err)
|
||||
}
|
||||
|
||||
// TODO: check after remove implemented
|
||||
//assert.Error(t, snapshotter.Remove(ctx, committed))
|
||||
//assert.NoError(t, snapshotter.Remove(ctx, nextCommitted))
|
||||
//assert.NoError(t, snapshotter.Remove(ctx, committed))
|
||||
}
|
||||
|
||||
// Create a New Layer on top of base layer with Prepare, Stat on new layer, should return Active layer.
|
||||
func checkSnapshotterStatActive(t *testing.T, snapshotter snapshot.Snapshotter, work string) {
|
||||
ctx := context.TODO()
|
||||
func checkSnapshotterStatActive(ctx context.Context, t *testing.T, snapshotter snapshot.Snapshotter, work string) {
|
||||
preparing := filepath.Join(work, "preparing")
|
||||
if err := os.MkdirAll(preparing, 0777); err != nil {
|
||||
t.Fatal(err)
|
||||
|
|
@ -227,8 +230,7 @@ func checkSnapshotterStatActive(t *testing.T, snapshotter snapshot.Snapshotter,
|
|||
}
|
||||
|
||||
// Commit a New Layer on top of base layer with Prepare & Commit , Stat on new layer, should return Committed layer.
|
||||
func checkSnapshotterStatCommitted(t *testing.T, snapshotter snapshot.Snapshotter, work string) {
|
||||
ctx := context.TODO()
|
||||
func checkSnapshotterStatCommitted(ctx context.Context, t *testing.T, snapshotter snapshot.Snapshotter, work string) {
|
||||
preparing := filepath.Join(work, "preparing")
|
||||
if err := os.MkdirAll(preparing, 0777); err != nil {
|
||||
t.Fatal(err)
|
||||
|
|
@ -289,8 +291,7 @@ func snapshotterPrepareMount(ctx context.Context, snapshotter snapshot.Snapshott
|
|||
}
|
||||
|
||||
// Given A <- B <- C, B is the parent of C and A is a transitive parent of C (in this case, a "grandparent")
|
||||
func checkSnapshotterTransitivity(t *testing.T, snapshotter snapshot.Snapshotter, work string) {
|
||||
ctx := context.TODO()
|
||||
func checkSnapshotterTransitivity(ctx context.Context, t *testing.T, snapshotter snapshot.Snapshotter, work string) {
|
||||
preparing, err := snapshotterPrepareMount(ctx, snapshotter, "preparing", "", work)
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
|
|
@ -344,9 +345,7 @@ func checkSnapshotterTransitivity(t *testing.T, snapshotter snapshot.Snapshotter
|
|||
}
|
||||
|
||||
// Creating two layers with Prepare or View with same key must fail.
|
||||
func checkSnapshotterPrepareView(t *testing.T, snapshotter snapshot.Snapshotter, work string) {
|
||||
ctx := context.TODO()
|
||||
|
||||
func checkSnapshotterPrepareView(ctx context.Context, t *testing.T, snapshotter snapshot.Snapshotter, work string) {
|
||||
preparing, err := snapshotterPrepareMount(ctx, snapshotter, "preparing", "", work)
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
|
|
|
|||
Loading…
Reference in New Issue