package libpod import ( "github.com/containers/libpod/libpod/events" "github.com/pkg/errors" ) // renumberLocks reassigns lock numbers for all containers and pods in the // state. // TODO: It would be desirable to make it impossible to call this until all // other libpod sessions are dead. // Possibly use a read-write file lock, with all non-renumber podmans owning the // lock as read, renumber attempting to take a write lock? // The alternative is some sort of session tracking, and I don't know how // reliable that can be. func (r *Runtime) renumberLocks() error { // Start off by deallocating all locks if err := r.lockManager.FreeAllLocks(); err != nil { return err } allCtrs, err := r.state.AllContainers() if err != nil { return err } for _, ctr := range allCtrs { lock, err := r.lockManager.AllocateLock() if err != nil { return errors.Wrapf(err, "error allocating lock for container %s", ctr.ID()) } ctr.config.LockID = lock.ID() // Write the new lock ID if err := r.state.RewriteContainerConfig(ctr, ctr.config); err != nil { return err } } allPods, err := r.state.AllPods() if err != nil { return err } for _, pod := range allPods { lock, err := r.lockManager.AllocateLock() if err != nil { return errors.Wrapf(err, "error allocating lock for pod %s", pod.ID()) } pod.config.LockID = lock.ID() // Write the new lock ID if err := r.state.RewritePodConfig(pod, pod.config); err != nil { return err } } r.newSystemEvent(events.Renumber) return nil }