package libpod import ( "fmt" "path/filepath" "time" "github.com/containers/libpod/libpod/define" "github.com/containers/storage/pkg/stringid" "github.com/pkg/errors" "github.com/sirupsen/logrus" ) // Creates a new, empty pod func newPod(runtime *Runtime) (*Pod, error) { pod := new(Pod) pod.config = new(PodConfig) pod.config.ID = stringid.GenerateNonCryptoID() pod.config.Labels = make(map[string]string) pod.config.CreatedTime = time.Now() pod.config.InfraContainer = new(InfraContainerConfig) pod.state = new(podState) pod.runtime = runtime return pod, nil } // Update pod state from database func (p *Pod) updatePod() error { if err := p.runtime.state.UpdatePod(p); err != nil { return err } return nil } // Save pod state to database func (p *Pod) save() error { if err := p.runtime.state.SavePod(p); err != nil { return errors.Wrapf(err, "error saving pod %s state", p.ID()) } return nil } // Refresh a pod's state after restart // This cannot lock any other pod, but may lock individual containers, as those // will have refreshed by the time pod refresh runs. func (p *Pod) refresh() error { // Need to to an update from the DB to pull potentially-missing state if err := p.runtime.state.UpdatePod(p); err != nil { return err } if !p.valid { return define.ErrPodRemoved } // Retrieve the pod's lock lock, err := p.runtime.lockManager.AllocateAndRetrieveLock(p.config.LockID) if err != nil { return errors.Wrapf(err, "error retrieving lock %d for pod %s", p.config.LockID, p.ID()) } p.lock = lock // We need to recreate the pod's cgroup if p.config.UsePodCgroup { switch p.runtime.config.CgroupManager { case define.SystemdCgroupsManager: cgroupPath, err := systemdSliceFromPath(p.config.CgroupParent, fmt.Sprintf("libpod_pod_%s", p.ID())) if err != nil { logrus.Errorf("Error creating CGroup for pod %s: %v", p.ID(), err) } p.state.CgroupPath = cgroupPath case define.CgroupfsCgroupsManager: p.state.CgroupPath = filepath.Join(p.config.CgroupParent, p.ID()) logrus.Debugf("setting pod cgroup to %s", p.state.CgroupPath) default: return errors.Wrapf(define.ErrInvalidArg, "unknown cgroups manager %s specified", p.runtime.config.CgroupManager) } } // Save changes return p.save() }