284 lines
6.6 KiB
Go
284 lines
6.6 KiB
Go
package cache
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import (
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"context"
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"testing"
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"github.com/containerd/containerd/namespaces"
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"github.com/containerd/containerd/snapshots/naive"
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"github.com/moby/buildkit/cache/metadata"
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"github.com/moby/buildkit/client"
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"github.com/moby/buildkit/snapshot"
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"github.com/pkg/errors"
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"github.com/stretchr/testify/require"
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)
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func TestManager(t *testing.T) {
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ctx := namespaces.WithNamespace(context.Background(), "buildkit-test")
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tmpdir, err := ioutil.TempDir("", "cachemanager")
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require.NoError(t, err)
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defer os.RemoveAll(tmpdir)
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snapshotter, err := naive.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
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require.NoError(t, err)
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cm := getCacheManager(t, tmpdir, snapshotter)
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_, err = cm.Get(ctx, "foobar")
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require.Error(t, err)
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checkDiskUsage(ctx, t, cm, 0, 0)
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active, err := cm.New(ctx, nil, CachePolicyRetain)
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require.NoError(t, err)
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m, err := active.Mount(ctx, false)
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require.NoError(t, err)
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lm := snapshot.LocalMounter(m)
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target, err := lm.Mount()
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require.NoError(t, err)
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fi, err := os.Stat(target)
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require.NoError(t, err)
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require.Equal(t, fi.IsDir(), true)
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err = lm.Unmount()
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require.NoError(t, err)
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_, err = cm.GetMutable(ctx, active.ID())
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require.Error(t, err)
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require.Equal(t, errLocked, errors.Cause(err))
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checkDiskUsage(ctx, t, cm, 1, 0)
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snap, err := active.Commit(ctx)
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require.NoError(t, err)
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checkDiskUsage(ctx, t, cm, 1, 0)
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_, err = cm.GetMutable(ctx, active.ID())
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require.Error(t, err)
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require.Equal(t, errLocked, errors.Cause(err))
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err = snap.Release(ctx)
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require.NoError(t, err)
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checkDiskUsage(ctx, t, cm, 0, 1)
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active, err = cm.GetMutable(ctx, active.ID())
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require.NoError(t, err)
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checkDiskUsage(ctx, t, cm, 1, 0)
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snap, err = active.Commit(ctx)
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require.NoError(t, err)
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checkDiskUsage(ctx, t, cm, 1, 0)
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err = snap.Finalize(ctx)
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require.NoError(t, err)
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err = snap.Release(ctx)
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require.NoError(t, err)
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_, err = cm.GetMutable(ctx, active.ID())
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require.Error(t, err)
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require.Equal(t, errNotFound, errors.Cause(err))
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_, err = cm.GetMutable(ctx, snap.ID())
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require.Error(t, err)
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require.Equal(t, errInvalid, errors.Cause(err))
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snap, err = cm.Get(ctx, snap.ID())
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require.NoError(t, err)
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snap2, err := cm.Get(ctx, snap.ID())
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require.NoError(t, err)
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checkDiskUsage(ctx, t, cm, 1, 0)
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err = snap.Release(ctx)
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require.NoError(t, err)
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active2, err := cm.New(ctx, snap2, CachePolicyRetain)
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require.NoError(t, err)
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checkDiskUsage(ctx, t, cm, 2, 0)
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snap3, err := active2.Commit(ctx)
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require.NoError(t, err)
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err = snap2.Release(ctx)
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require.NoError(t, err)
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checkDiskUsage(ctx, t, cm, 2, 0)
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err = snap3.Release(ctx)
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require.NoError(t, err)
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checkDiskUsage(ctx, t, cm, 0, 2)
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err = cm.Close()
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require.NoError(t, err)
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}
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func TestLazyCommit(t *testing.T) {
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ctx := namespaces.WithNamespace(context.Background(), "buildkit-test")
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tmpdir, err := ioutil.TempDir("", "cachemanager")
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require.NoError(t, err)
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defer os.RemoveAll(tmpdir)
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snapshotter, err := naive.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
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require.NoError(t, err)
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cm := getCacheManager(t, tmpdir, snapshotter)
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active, err := cm.New(ctx, nil, CachePolicyRetain)
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require.NoError(t, err)
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// after commit mutable is locked
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snap, err := active.Commit(ctx)
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require.NoError(t, err)
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_, err = cm.GetMutable(ctx, active.ID())
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require.Error(t, err)
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require.Equal(t, errLocked, errors.Cause(err))
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// immutable refs still work
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snap2, err := cm.Get(ctx, snap.ID())
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require.NoError(t, err)
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require.Equal(t, snap.ID(), snap2.ID())
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err = snap.Release(ctx)
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require.NoError(t, err)
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err = snap2.Release(ctx)
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require.NoError(t, err)
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// immutable work after final release as well
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snap, err = cm.Get(ctx, snap.ID())
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require.NoError(t, err)
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require.Equal(t, snap.ID(), snap2.ID())
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// active can't be get while immutable is held
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_, err = cm.GetMutable(ctx, active.ID())
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require.Error(t, err)
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require.Equal(t, errLocked, errors.Cause(err))
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err = snap.Release(ctx)
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require.NoError(t, err)
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// after release mutable becomes available again
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active2, err := cm.GetMutable(ctx, active.ID())
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require.NoError(t, err)
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require.Equal(t, active2.ID(), active.ID())
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// because ref was took mutable old immutable are cleared
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_, err = cm.Get(ctx, snap.ID())
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require.Error(t, err)
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require.Equal(t, errNotFound, errors.Cause(err))
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snap, err = active2.Commit(ctx)
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require.NoError(t, err)
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// this time finalize commit
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err = snap.Finalize(ctx)
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require.NoError(t, err)
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err = snap.Release(ctx)
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require.NoError(t, err)
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// mutable is gone after finalize
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_, err = cm.GetMutable(ctx, active2.ID())
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require.Error(t, err)
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require.Equal(t, errNotFound, errors.Cause(err))
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// immutable still works
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snap2, err = cm.Get(ctx, snap.ID())
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require.NoError(t, err)
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require.Equal(t, snap.ID(), snap2.ID())
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err = snap2.Release(ctx)
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require.NoError(t, err)
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// test restarting after commit
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active, err = cm.New(ctx, nil, CachePolicyRetain)
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require.NoError(t, err)
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// after commit mutable is locked
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snap, err = active.Commit(ctx)
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require.NoError(t, err)
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err = cm.Close()
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require.NoError(t, err)
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// we can't close snapshotter and open it twice (especially, its internal boltdb store)
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cm = getCacheManager(t, tmpdir, snapshotter)
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snap2, err = cm.Get(ctx, snap.ID())
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require.NoError(t, err)
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err = snap2.Release(ctx)
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require.NoError(t, err)
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active, err = cm.GetMutable(ctx, active.ID())
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require.NoError(t, err)
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_, err = cm.Get(ctx, snap.ID())
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require.Error(t, err)
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require.Equal(t, errNotFound, errors.Cause(err))
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snap, err = active.Commit(ctx)
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require.NoError(t, err)
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err = cm.Close()
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require.NoError(t, err)
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cm = getCacheManager(t, tmpdir, snapshotter)
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snap2, err = cm.Get(ctx, snap.ID())
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require.NoError(t, err)
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err = snap2.Finalize(ctx)
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require.NoError(t, err)
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err = snap2.Release(ctx)
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require.NoError(t, err)
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active, err = cm.GetMutable(ctx, active.ID())
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require.Error(t, err)
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require.Equal(t, errNotFound, errors.Cause(err))
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}
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func getCacheManager(t *testing.T, tmpdir string, snapshotter snapshot.Snapshotter) Manager {
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md, err := metadata.NewStore(filepath.Join(tmpdir, "metadata.db"))
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require.NoError(t, err)
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cm, err := NewManager(ManagerOpt{
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Snapshotter: snapshotter,
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MetadataStore: md,
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})
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require.NoError(t, err, fmt.Sprintf("error: %+v", err))
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return cm
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}
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func checkDiskUsage(ctx context.Context, t *testing.T, cm Manager, inuse, unused int) {
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du, err := cm.DiskUsage(ctx, client.DiskUsageInfo{})
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require.NoError(t, err)
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var inuseActual, unusedActual int
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for _, r := range du {
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if r.InUse {
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inuseActual++
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} else {
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unusedActual++
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}
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}
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require.Equal(t, inuse, inuseActual)
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require.Equal(t, unused, unusedActual)
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}
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