Remote filesystem based on grpc and fuse
Grfuse consists of two parts: grpc server and client library, which implements github.com/hanwen/go-fuse/fuse/pathfs#FileSystem interface. You can switch underlying implementations in server.
Server:
package main
import (
"fmt"
"log"
"net"
"os"
"os/signal"
"google.golang.org/grpc"
"github.com/LK4D4/grfuse/pb"
"github.com/LK4D4/grfuse/server"
"github.com/hanwen/go-fuse/fuse"
"github.com/hanwen/go-fuse/fuse/nodefs"
"github.com/hanwen/go-fuse/fuse/pathfs"
)
type HelloFs struct {
pathfs.FileSystem
}
func (me *HelloFs) GetAttr(name string, context *fuse.Context) (*fuse.Attr, fuse.Status) {
switch name {
case "file.txt":
return &fuse.Attr{
Mode: fuse.S_IFREG | 0644, Size: uint64(len(name)),
}, fuse.OK
case "":
return &fuse.Attr{
Mode: fuse.S_IFDIR | 0755,
}, fuse.OK
}
return nil, fuse.ENOENT
}
func (me *HelloFs) OpenDir(name string, context *fuse.Context) (c []fuse.DirEntry, code fuse.Status) {
if name == "" {
c = []fuse.DirEntry{{Name: "file.txt", Mode: fuse.S_IFREG}}
return c, fuse.OK
}
return nil, fuse.ENOENT
}
func (me *HelloFs) Open(name string, flags uint32, context *fuse.Context) (file nodefs.File, code fuse.Status) {
if name != "file.txt" {
return nil, fuse.ENOENT
}
if flags&fuse.O_ANYWRITE != 0 {
return nil, fuse.EPERM
}
return nodefs.NewDataFile([]byte(name)), fuse.OK
}
func main() {
if len(os.Args) != 2 {
fmt.Println("Usage: %s <mountpath>")
os.Exit(1)
}
root := os.Args[1]
hfs := &HelloFs{FileSystem: pathfs.NewDefaultFileSystem()}
nfs := pathfs.NewPathNodeFs(hfs, nil)
fuseSrv, _, err := nodefs.MountRoot(root, nfs.Root(), nil)
if err != nil {
log.Fatal(err)
}
go fuseSrv.Serve()
l, err := net.Listen("tcp", "127.0.0.1:50000")
if err != nil {
log.Fatal(err)
}
s := grpc.NewServer()
pb.RegisterPathFSServer(s, server.New(hfs))
go s.Serve(l)
log.Printf("Listen on %s for dir %s", l.Addr(), root)
sigCh := make(chan os.Signal)
signal.Notify(sigCh, os.Interrupt)
for range sigCh {
fuseSrv.Unmount()
s.Stop()
os.Exit(0)
}
}
Client:
package main
import (
"fmt"
"log"
"os"
"os/signal"
"github.com/LK4D4/grfuse/grpcfs"
"github.com/LK4D4/grfuse/pb"
"github.com/hanwen/go-fuse/fuse/nodefs"
"github.com/hanwen/go-fuse/fuse/pathfs"
"google.golang.org/grpc"
)
func main() {
if len(os.Args) != 2 {
fmt.Println("Usage: %s <mountpath>")
os.Exit(1)
}
root := os.Args[1]
dialOpts := []grpc.DialOption{grpc.WithInsecure()}
conn, err := grpc.Dial("127.0.0.1:50000", dialOpts...)
if err != nil {
log.Fatal(err)
}
cli := pb.NewPathFSClient(conn)
fs := grpcfs.New(cli)
nfs := pathfs.NewPathNodeFs(fs, nil)
server, _, err := nodefs.MountRoot(root, nfs.Root(), nil)
if err != nil {
log.Fatal(err)
}
go server.Serve()
log.Printf("Fs mounted to root %s", root)
sigCh := make(chan os.Signal)
signal.Notify(sigCh, os.Interrupt)
for range sigCh {
server.Unmount()
os.Exit(0)
}
}