package daemon import ( "fmt" "os" "path" "github.com/Sirupsen/logrus" ) // ContainerRmConfig is a holder for passing in runtime config. type ContainerRmConfig struct { ForceRemove, RemoveVolume, RemoveLink bool } // ContainerRm removes the container id from the filesystem. An error // is returned if the container is not found, or if the remove // fails. If the remove succeeds, the container name is released, and // network links are removed. func (daemon *Daemon) ContainerRm(name string, config *ContainerRmConfig) error { container, err := daemon.Get(name) if err != nil { return err } if config.RemoveLink { name, err := GetFullContainerName(name) if err != nil { return err } parent, n := path.Split(name) if parent == "/" { return fmt.Errorf("Conflict, cannot remove the default name of the container") } pe := daemon.containerGraph().Get(parent) if pe == nil { return fmt.Errorf("Cannot get parent %s for name %s", parent, name) } if err := daemon.containerGraph().Delete(name); err != nil { return err } parentContainer, _ := daemon.Get(pe.ID()) if parentContainer != nil { if err := parentContainer.updateNetwork(); err != nil { logrus.Debugf("Could not update network to remove link %s: %v", n, err) } } return nil } if err := daemon.rm(container, config.ForceRemove); err != nil { return fmt.Errorf("Cannot destroy container %s: %v", name, err) } container.removeMountPoints(config.RemoveVolume) return nil } // Destroy unregisters a container from the daemon and cleanly removes its contents from the filesystem. func (daemon *Daemon) rm(container *Container, forceRemove bool) (err error) { if container.IsRunning() { if !forceRemove { return fmt.Errorf("Conflict, You cannot remove a running container. Stop the container before attempting removal or use -f") } if err := container.Kill(); err != nil { return fmt.Errorf("Could not kill running container, cannot remove - %v", err) } } // stop collection of stats for the container regardless // if stats are currently getting collected. daemon.statsCollector.stopCollection(container) element := daemon.containers.Get(container.ID) if element == nil { return fmt.Errorf("Container %v not found - maybe it was already destroyed?", container.ID) } // Container state RemovalInProgress should be used to avoid races. if err = container.setRemovalInProgress(); err != nil { return fmt.Errorf("Failed to set container state to RemovalInProgress: %s", err) } defer container.resetRemovalInProgress() if err = container.Stop(3); err != nil { return err } // Mark container dead. We don't want anybody to be restarting it. container.setDead() // Save container state to disk. So that if error happens before // container meta file got removed from disk, then a restart of // docker should not make a dead container alive. if err := container.toDiskLocking(); err != nil { logrus.Errorf("Error saving dying container to disk: %v", err) } // If force removal is required, delete container from various // indexes even if removal failed. defer func() { if err != nil && forceRemove { daemon.idIndex.Delete(container.ID) daemon.containers.Delete(container.ID) os.RemoveAll(container.root) container.logEvent("destroy") } }() if _, err := daemon.containerGraphDB.Purge(container.ID); err != nil { logrus.Debugf("Unable to remove container from link graph: %s", err) } if err = daemon.driver.Remove(container.ID); err != nil { return fmt.Errorf("Driver %s failed to remove root filesystem %s: %s", daemon.driver, container.ID, err) } initID := fmt.Sprintf("%s-init", container.ID) if err := daemon.driver.Remove(initID); err != nil { return fmt.Errorf("Driver %s failed to remove init filesystem %s: %s", daemon.driver, initID, err) } if err = os.RemoveAll(container.root); err != nil { return fmt.Errorf("Unable to remove filesystem for %v: %v", container.ID, err) } if err = daemon.execDriver.Clean(container.ID); err != nil { return fmt.Errorf("Unable to remove execdriver data for %s: %s", container.ID, err) } selinuxFreeLxcContexts(container.ProcessLabel) daemon.idIndex.Delete(container.ID) daemon.containers.Delete(container.ID) container.logEvent("destroy") return nil } // VolumeRm removes the volume with the given name. // If the volume is referenced by a container it is not removed // This is called directly from the remote API func (daemon *Daemon) VolumeRm(name string) error { v, err := daemon.volumes.Get(name) if err != nil { return err } if err := daemon.volumes.Remove(v); err != nil { if err == ErrVolumeInUse { return fmt.Errorf("Conflict: %v", err) } return err } return nil }