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-rw-r--r--libpod/boltdb_state.go68
-rw-r--r--libpod/container_internal.go100
-rw-r--r--libpod/container_internal_linux.go4
-rw-r--r--libpod/in_memory_state.go35
-rw-r--r--libpod/runtime_ctr.go4
-rw-r--r--libpod/runtime_volume.go46
-rw-r--r--libpod/state.go3
-rw-r--r--libpod/volume.go7
-rw-r--r--libpod/volume_internal.go2
9 files changed, 201 insertions, 68 deletions
diff --git a/libpod/boltdb_state.go b/libpod/boltdb_state.go
index 31b551b36..4e7f78f13 100644
--- a/libpod/boltdb_state.go
+++ b/libpod/boltdb_state.go
@@ -1735,6 +1735,74 @@ func (s *BoltState) Volume(name string) (*Volume, error) {
return volume, nil
}
+// LookupVolume locates a volume from a partial name.
+func (s *BoltState) LookupVolume(name string) (*Volume, error) {
+ if name == "" {
+ return nil, define.ErrEmptyID
+ }
+
+ if !s.valid {
+ return nil, define.ErrDBClosed
+ }
+
+ volName := []byte(name)
+
+ volume := new(Volume)
+ volume.config = new(VolumeConfig)
+
+ db, err := s.getDBCon()
+ if err != nil {
+ return nil, err
+ }
+ defer s.deferredCloseDBCon(db)
+
+ err = db.View(func(tx *bolt.Tx) error {
+ volBkt, err := getVolBucket(tx)
+ if err != nil {
+ return err
+ }
+
+ allVolsBkt, err := getAllVolsBucket(tx)
+ if err != nil {
+ return err
+ }
+
+ // Check for exact match on name
+ volDB := volBkt.Bucket(volName)
+ if volDB != nil {
+ return s.getVolumeFromDB(volName, volume, volBkt)
+ }
+
+ // No exact match. Search all names.
+ foundMatch := false
+ err = allVolsBkt.ForEach(func(checkName, checkName2 []byte) error {
+ if strings.HasPrefix(string(checkName), name) {
+ if foundMatch {
+ return errors.Wrapf(define.ErrVolumeExists, "more than one result for volume name %q", name)
+ }
+ foundMatch = true
+ volName = checkName
+ }
+ return nil
+ })
+ if err != nil {
+ return err
+ }
+
+ if !foundMatch {
+ return errors.Wrapf(define.ErrNoSuchVolume, "no volume with name %q found", name)
+ }
+
+ return s.getVolumeFromDB(volName, volume, volBkt)
+ })
+ if err != nil {
+ return nil, err
+ }
+
+ return volume, nil
+
+}
+
// HasVolume returns true if the given volume exists in the state, otherwise it returns false
func (s *BoltState) HasVolume(name string) (bool, error) {
if name == "" {
diff --git a/libpod/container_internal.go b/libpod/container_internal.go
index 1ca20a05d..ac565fdad 100644
--- a/libpod/container_internal.go
+++ b/libpod/container_internal.go
@@ -21,6 +21,7 @@ import (
"github.com/containers/storage"
"github.com/containers/storage/pkg/archive"
"github.com/containers/storage/pkg/mount"
+ "github.com/cyphar/filepath-securejoin"
spec "github.com/opencontainers/runtime-spec/specs-go"
"github.com/opencontainers/runtime-tools/generate"
"github.com/opencontainers/selinux/go-selinux/label"
@@ -1242,43 +1243,82 @@ func (c *Container) mountStorage() (_ string, Err error) {
}()
}
+ // We need to mount the container before volumes - to ensure the copyup
+ // works properly.
+ mountPoint := c.config.Rootfs
+ if mountPoint == "" {
+ mountPoint, err = c.mount()
+ if err != nil {
+ return "", err
+ }
+ defer func() {
+ if Err != nil {
+ if err := c.unmount(false); err != nil {
+ logrus.Errorf("Error unmounting container %s after mount error: %v", c.ID(), err)
+ }
+ }
+ }()
+ }
+
// Request a mount of all named volumes
for _, v := range c.config.NamedVolumes {
- vol, err := c.runtime.state.Volume(v.Name)
+ vol, err := c.mountNamedVolume(v, mountPoint)
if err != nil {
- return "", errors.Wrapf(err, "error retrieving named volume %s for container %s", v.Name, c.ID())
+ return "", err
}
-
- if vol.needsMount() {
+ defer func() {
+ if Err == nil {
+ return
+ }
vol.lock.Lock()
- if err := vol.mount(); err != nil {
- vol.lock.Unlock()
- return "", errors.Wrapf(err, "error mounting volume %s for container %s", vol.Name(), c.ID())
+ if err := vol.unmount(false); err != nil {
+ logrus.Errorf("Error unmounting volume %s after error mounting container %s: %v", vol.Name(), c.ID(), err)
}
vol.lock.Unlock()
- defer func() {
- if Err == nil {
- return
- }
- vol.lock.Lock()
- if err := vol.unmount(false); err != nil {
- logrus.Errorf("Error unmounting volume %s after error mounting container %s: %v", vol.Name(), c.ID(), err)
- }
- vol.lock.Unlock()
- }()
- }
+ }()
}
- // TODO: generalize this mount code so it will mount every mount in ctr.config.Mounts
- mountPoint := c.config.Rootfs
- if mountPoint == "" {
- mountPoint, err = c.mount()
- if err != nil {
- return "", err
+ return mountPoint, nil
+}
+
+// Mount a single named volume into the container.
+// If necessary, copy up image contents into the volume.
+// Does not verify that the name volume given is actually present in container
+// config.
+// Returns the volume that was mounted.
+func (c *Container) mountNamedVolume(v *ContainerNamedVolume, mountpoint string) (*Volume, error) {
+ vol, err := c.runtime.state.Volume(v.Name)
+ if err != nil {
+ return nil, errors.Wrapf(err, "error retrieving named volume %s for container %s", v.Name, c.ID())
+ }
+
+ vol.lock.Lock()
+ defer vol.lock.Unlock()
+ if vol.needsMount() {
+ if err := vol.mount(); err != nil {
+ return nil, errors.Wrapf(err, "error mounting volume %s for container %s", vol.Name(), c.ID())
}
}
+ // The volume may need a copy-up. Check the state.
+ if err := vol.update(); err != nil {
+ return nil, err
+ }
+ if vol.state.NeedsCopyUp {
+ logrus.Debugf("Copying up contents from container %s to volume %s", c.ID(), vol.Name())
+ srcDir, err := securejoin.SecureJoin(mountpoint, v.Dest)
+ if err != nil {
+ return nil, errors.Wrapf(err, "error calculating destination path to copy up container %s volume %s", c.ID(), vol.Name())
+ }
+ if err := c.copyWithTarFromImage(srcDir, vol.MountPoint()); err != nil && !os.IsNotExist(err) {
+ return nil, errors.Wrapf(err, "error copying content from container %s into volume %s", c.ID(), vol.Name())
+ }
- return mountPoint, nil
+ vol.state.NeedsCopyUp = false
+ if err := vol.save(); err != nil {
+ return nil, err
+ }
+ }
+ return vol, nil
}
// cleanupStorage unmounts and cleans up the container's root filesystem
@@ -1622,15 +1662,11 @@ func (c *Container) unmount(force bool) error {
}
// this should be from chrootarchive.
-func (c *Container) copyWithTarFromImage(src, dest string) error {
- mountpoint, err := c.mount()
- if err != nil {
- return err
- }
+// Container MUST be mounted before calling.
+func (c *Container) copyWithTarFromImage(source, dest string) error {
a := archive.NewDefaultArchiver()
- source := filepath.Join(mountpoint, src)
- if err = c.copyOwnerAndPerms(source, dest); err != nil {
+ if err := c.copyOwnerAndPerms(source, dest); err != nil {
return err
}
return a.CopyWithTar(source, dest)
diff --git a/libpod/container_internal_linux.go b/libpod/container_internal_linux.go
index 5dc53582f..21429c09e 100644
--- a/libpod/container_internal_linux.go
+++ b/libpod/container_internal_linux.go
@@ -115,7 +115,9 @@ func (c *Container) prepare() (Err error) {
createErr = createNetNSErr
}
if mountStorageErr != nil {
- logrus.Errorf("Error preparing container %s: %v", c.ID(), createErr)
+ if createErr != nil {
+ logrus.Errorf("Error preparing container %s: %v", c.ID(), createErr)
+ }
createErr = mountStorageErr
}
diff --git a/libpod/in_memory_state.go b/libpod/in_memory_state.go
index 280ae5f5c..a008fcb39 100644
--- a/libpod/in_memory_state.go
+++ b/libpod/in_memory_state.go
@@ -459,6 +459,41 @@ func (s *InMemoryState) Volume(name string) (*Volume, error) {
return vol, nil
}
+// LookupVolume finds a volume from an unambiguous partial ID.
+func (s *InMemoryState) LookupVolume(name string) (*Volume, error) {
+ if name == "" {
+ return nil, define.ErrEmptyID
+ }
+
+ vol, ok := s.volumes[name]
+ if ok {
+ return vol, nil
+ }
+
+ // Alright, we've failed to find by full name. Now comes the expensive
+ // part.
+ // Loop through all volumes and look for matches.
+ var (
+ foundMatch bool
+ candidate *Volume
+ )
+ for volName, vol := range s.volumes {
+ if strings.HasPrefix(volName, name) {
+ if foundMatch {
+ return nil, errors.Wrapf(define.ErrVolumeExists, "more than one result for volume name %q", name)
+ }
+ candidate = vol
+ foundMatch = true
+ }
+ }
+
+ if !foundMatch {
+ return nil, errors.Wrapf(define.ErrNoSuchVolume, "no volume with name %q found", name)
+ }
+
+ return candidate, nil
+}
+
// HasVolume checks if a volume with the given name is present in the state
func (s *InMemoryState) HasVolume(name string) (bool, error) {
if name == "" {
diff --git a/libpod/runtime_ctr.go b/libpod/runtime_ctr.go
index e421c09f0..bffce7bca 100644
--- a/libpod/runtime_ctr.go
+++ b/libpod/runtime_ctr.go
@@ -306,10 +306,6 @@ func (r *Runtime) setupContainer(ctx context.Context, ctr *Container) (c *Contai
return nil, errors.Wrapf(err, "error creating named volume %q", vol.Name)
}
- if err := ctr.copyWithTarFromImage(vol.Dest, newVol.MountPoint()); err != nil && !os.IsNotExist(err) {
- return nil, errors.Wrapf(err, "Failed to copy content into new volume mount %q", vol.Name)
- }
-
ctrNamedVolumes = append(ctrNamedVolumes, newVol)
}
diff --git a/libpod/runtime_volume.go b/libpod/runtime_volume.go
index 512e778a1..a6ab748e5 100644
--- a/libpod/runtime_volume.go
+++ b/libpod/runtime_volume.go
@@ -6,7 +6,6 @@ import (
"github.com/containers/libpod/libpod/define"
"github.com/containers/libpod/libpod/events"
"github.com/pkg/errors"
- "github.com/sirupsen/logrus"
)
// Contains the public Runtime API for volumes
@@ -43,40 +42,25 @@ func (r *Runtime) RemoveVolume(ctx context.Context, v *Volume, force bool) error
return r.removeVolume(ctx, v, force)
}
-// RemoveVolumes removes a slice of volumes or all with a force bool
-func (r *Runtime) RemoveVolumes(ctx context.Context, volumes []string, all, force bool) ([]string, error) {
- var (
- vols []*Volume
- err error
- deletedVols []string
- )
- if all {
- vols, err = r.Volumes()
- if err != nil {
- return nil, errors.Wrapf(err, "unable to get all volumes")
- }
- } else {
- for _, i := range volumes {
- vol, err := r.GetVolume(i)
- if err != nil {
- return nil, err
- }
- vols = append(vols, vol)
- }
+// GetVolume retrieves a volume given its full name.
+func (r *Runtime) GetVolume(name string) (*Volume, error) {
+ r.lock.RLock()
+ defer r.lock.RUnlock()
+
+ if !r.valid {
+ return nil, define.ErrRuntimeStopped
}
- for _, vol := range vols {
- if err := r.RemoveVolume(ctx, vol, force); err != nil {
- return deletedVols, err
- }
- logrus.Debugf("removed volume %s", vol.Name())
- deletedVols = append(deletedVols, vol.Name())
+ vol, err := r.state.Volume(name)
+ if err != nil {
+ return nil, err
}
- return deletedVols, nil
+
+ return vol, nil
}
-// GetVolume retrieves a volume given its full name.
-func (r *Runtime) GetVolume(name string) (*Volume, error) {
+// LookupVolume retrieves a volume by unambigious partial name.
+func (r *Runtime) LookupVolume(name string) (*Volume, error) {
r.lock.RLock()
defer r.lock.RUnlock()
@@ -84,7 +68,7 @@ func (r *Runtime) GetVolume(name string) (*Volume, error) {
return nil, define.ErrRuntimeStopped
}
- vol, err := r.state.Volume(name)
+ vol, err := r.state.LookupVolume(name)
if err != nil {
return nil, err
}
diff --git a/libpod/state.go b/libpod/state.go
index db4667ad6..40080d2cc 100644
--- a/libpod/state.go
+++ b/libpod/state.go
@@ -190,6 +190,9 @@ type State interface {
// Volume accepts full name of volume
// If the volume doesn't exist, an error will be returned
Volume(volName string) (*Volume, error)
+ // LookupVolume accepts an unambiguous partial name or full name of a
+ // volume. Ambiguous names will result in an error.
+ LookupVolume(name string) (*Volume, error)
// HasVolume returns true if volName exists in the state,
// otherwise it returns false
HasVolume(volName string) (bool, error)
diff --git a/libpod/volume.go b/libpod/volume.go
index b4de3aedc..c4771bbb8 100644
--- a/libpod/volume.go
+++ b/libpod/volume.go
@@ -57,6 +57,13 @@ type VolumeState struct {
// On incrementing from 0, the volume will be mounted on the host.
// On decrementing to 0, the volume will be unmounted on the host.
MountCount uint `json:"mountCount"`
+ // NeedsCopyUp indicates that the next time the volume is mounted into
+ // a container, the container will "copy up" the contents of the
+ // mountpoint into the volume.
+ // This should only be done once. As such, this is set at container
+ // create time, then cleared after the copy up is done and never set
+ // again.
+ NeedsCopyUp bool `json:"notYetMounted,omitempty"`
}
// Name retrieves the volume's name
diff --git a/libpod/volume_internal.go b/libpod/volume_internal.go
index 2e886e1b0..42b935e7c 100644
--- a/libpod/volume_internal.go
+++ b/libpod/volume_internal.go
@@ -11,9 +11,11 @@ import (
func newVolume(runtime *Runtime) (*Volume, error) {
volume := new(Volume)
volume.config = new(VolumeConfig)
+ volume.state = new(VolumeState)
volume.runtime = runtime
volume.config.Labels = make(map[string]string)
volume.config.Options = make(map[string]string)
+ volume.state.NeedsCopyUp = true
return volume, nil
}
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-09-29 11:18:10 +0000