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package libpod
import (
"time"
"github.com/containers/podman/v2/libpod/define"
"github.com/containers/storage"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// StorageContainer represents a container present in c/storage but not in
// libpod.
type StorageContainer struct {
ID string
Names []string
Image string
CreateTime time.Time
PresentInLibpod bool
}
// ListStorageContainers lists all containers visible to c/storage.
func (r *Runtime) ListStorageContainers() ([]*StorageContainer, error) {
r.lock.RLock()
defer r.lock.RUnlock()
finalCtrs := []*StorageContainer{}
ctrs, err := r.store.Containers()
if err != nil {
return nil, err
}
for _, ctr := range ctrs {
storageCtr := new(StorageContainer)
storageCtr.ID = ctr.ID
storageCtr.Names = ctr.Names
storageCtr.Image = ctr.ImageID
storageCtr.CreateTime = ctr.Created
// Look up if container is in state
hasCtr, err := r.state.HasContainer(ctr.ID)
if err != nil {
return nil, errors.Wrapf(err, "error looking up container %s in state", ctr.ID)
}
storageCtr.PresentInLibpod = hasCtr
finalCtrs = append(finalCtrs, storageCtr)
}
return finalCtrs, nil
}
// RemoveStorageContainer removes a container from c/storage.
// The container WILL NOT be removed if it exists in libpod.
// Accepts ID or full name of container.
// If force is set, the container will be unmounted first to ensure removal.
func (r *Runtime) RemoveStorageContainer(idOrName string, force bool) error {
r.lock.Lock()
defer r.lock.Unlock()
return r.removeStorageContainer(idOrName, force)
}
// Internal function to remove the container storage without
// locking the runtime.
func (r *Runtime) removeStorageContainer(idOrName string, force bool) error {
targetID, err := r.store.Lookup(idOrName)
if err != nil {
if errors.Cause(err) == storage.ErrLayerUnknown {
return errors.Wrapf(define.ErrNoSuchCtr, "no container with ID or name %q found", idOrName)
}
return errors.Wrapf(err, "error looking up container %q", idOrName)
}
// Lookup returns an ID but it's not guaranteed to be a container ID.
// So we can still error here.
ctr, err := r.store.Container(targetID)
if err != nil {
if errors.Cause(err) == storage.ErrContainerUnknown {
return errors.Wrapf(define.ErrNoSuchCtr, "%q does not refer to a container", idOrName)
}
return errors.Wrapf(err, "error retrieving container %q", idOrName)
}
// Error out if the container exists in libpod
exists, err := r.state.HasContainer(ctr.ID)
if err != nil {
return err
}
if exists {
return errors.Wrapf(define.ErrCtrExists, "refusing to remove %q as it exists in libpod as container %s", idOrName, ctr.ID)
}
if !force {
timesMounted, err := r.store.Mounted(ctr.ID)
if err != nil {
if errors.Cause(err) == storage.ErrContainerUnknown {
// Container was removed from under us.
// It's gone, so don't bother erroring.
logrus.Warnf("Storage for container %s already removed", ctr.ID)
return nil
}
return errors.Wrapf(err, "error looking up container %q mounts", idOrName)
}
if timesMounted > 0 {
return errors.Wrapf(define.ErrCtrStateInvalid, "container %q is mounted and cannot be removed without using force", idOrName)
}
} else if _, err := r.store.Unmount(ctr.ID, true); err != nil {
if errors.Cause(err) == storage.ErrContainerUnknown {
// Container again gone, no error
logrus.Warnf("Storage for container %s already removed", ctr.ID)
return nil
}
return errors.Wrapf(err, "error unmounting container %q", idOrName)
}
if err := r.store.DeleteContainer(ctr.ID); err != nil {
if errors.Cause(err) == storage.ErrContainerUnknown {
// Container again gone, no error
logrus.Warnf("Storage for container %s already removed", ctr.ID)
return nil
}
return errors.Wrapf(err, "error removing storage for container %q", idOrName)
}
return nil
}
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