package s3 import ( "fmt" "os/exec" "github.com/golang/glog" "k8s.io/kubernetes/pkg/util/mount" ) // Mounter interface which can be implemented // by the different mounter types type Mounter interface { Stage(stagePath string) error Unstage(stagePath string) error Mount(source string, target string) error Unmount(target string) error } const ( s3fsMounterType = "s3fs" goofysMounterType = "goofys" s3qlMounterType = "s3ql" s3backerMounterType = "s3backer" ) // newMounter returns a new mounter depending on the mounterType parameter func newMounter(bucket *bucket, cfg *Config) (Mounter, error) { switch cfg.Mounter { case s3fsMounterType: return newS3fsMounter(bucket, cfg) case goofysMounterType: return newGoofysMounter(bucket, cfg) case s3qlMounterType: return newS3qlMounter(bucket, cfg) case s3backerMounterType: return newS3backerMounter(bucket, cfg) } return nil, fmt.Errorf("Error mounting bucket %s, invalid mounter specified: %s", bucket.Name, cfg.Mounter) } func fuseMount(path string, command string, args []string) error { cmd := exec.Command(command, args...) out, err := cmd.CombinedOutput() if err != nil { return fmt.Errorf("Error fuseMount command: %s\nargs: %s\noutput: %s", command, args, out) } return nil } func fuseUnmount(path string, command string) error { if err := mount.New("").Unmount(path); err != nil { return err } // as fuse quits immediately, we will try to wait until the process is done process, err := findFuseMountProcess(path, command) if err != nil { glog.Errorf("Error getting PID of fuse mount: %s", err) return nil } if process == nil { glog.Warningf("Unable to find PID of fuse mount %s, it must have finished already", path) return nil } glog.Infof("Found fuse pid %v of mount %s, checking if it still runs", process.Pid, path) return waitForProcess(process, 1) }