| // +build !windows |
| |
| package daemon |
| |
| import ( |
| "os" |
| "sort" |
| "strconv" |
| |
| "github.com/docker/docker/container" |
| "github.com/docker/docker/volume" |
| ) |
| |
| // setupMounts iterates through each of the mount points for a container and |
| // calls Setup() on each. It also looks to see if is a network mount such as |
| // /etc/resolv.conf, and if it is not, appends it to the array of mounts. |
| func (daemon *Daemon) setupMounts(c *container.Container) ([]container.Mount, error) { |
| var mounts []container.Mount |
| // TODO: tmpfs mounts should be part of Mountpoints |
| tmpfsMounts := make(map[string]bool) |
| for _, m := range c.TmpfsMounts() { |
| tmpfsMounts[m.Destination] = true |
| } |
| for _, m := range c.MountPoints { |
| if tmpfsMounts[m.Destination] { |
| continue |
| } |
| if err := daemon.lazyInitializeVolume(c.ID, m); err != nil { |
| return nil, err |
| } |
| path, err := m.Setup(c.MountLabel) |
| if err != nil { |
| return nil, err |
| } |
| if !c.TrySetNetworkMount(m.Destination, path) { |
| mnt := container.Mount{ |
| Source: path, |
| Destination: m.Destination, |
| Writable: m.RW, |
| Propagation: m.Propagation, |
| } |
| if m.Volume != nil { |
| attributes := map[string]string{ |
| "driver": m.Volume.DriverName(), |
| "container": c.ID, |
| "destination": m.Destination, |
| "read/write": strconv.FormatBool(m.RW), |
| "propagation": m.Propagation, |
| } |
| daemon.LogVolumeEvent(m.Volume.Name(), "mount", attributes) |
| } |
| mounts = append(mounts, mnt) |
| } |
| } |
| |
| mounts = sortMounts(mounts) |
| netMounts := c.NetworkMounts() |
| // if we are going to mount any of the network files from container |
| // metadata, the ownership must be set properly for potential container |
| // remapped root (user namespaces) |
| rootUID, rootGID := daemon.GetRemappedUIDGID() |
| for _, mount := range netMounts { |
| if err := os.Chown(mount.Source, rootUID, rootGID); err != nil { |
| return nil, err |
| } |
| } |
| return append(mounts, netMounts...), nil |
| } |
| |
| // sortMounts sorts an array of mounts in lexicographic order. This ensure that |
| // when mounting, the mounts don't shadow other mounts. For example, if mounting |
| // /etc and /etc/resolv.conf, /etc/resolv.conf must not be mounted first. |
| func sortMounts(m []container.Mount) []container.Mount { |
| sort.Sort(mounts(m)) |
| return m |
| } |
| |
| // setBindModeIfNull is platform specific processing to ensure the |
| // shared mode is set to 'z' if it is null. This is called in the case |
| // of processing a named volume and not a typical bind. |
| func setBindModeIfNull(bind *volume.MountPoint) *volume.MountPoint { |
| if bind.Mode == "" { |
| bind.Mode = "z" |
| } |
| return bind |
| } |