/
serve.go
68 lines (54 loc) · 1.43 KB
/
serve.go
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package volume
import (
"fmt"
"net"
"os"
"path/filepath"
"syscall"
"github.com/docker/go-connections/sockets"
"github.com/docker/go-plugins-helpers/volume"
"go.uber.org/zap"
)
const defaultPluginSockDir = "/run/docker/plugins"
func fullSocketPath(dir, address string) (string, error) {
if err := os.MkdirAll(dir, 0755); err != nil {
return "", err
}
if filepath.IsAbs(address) {
return address, nil
}
return filepath.Join(dir, address+".sock"), nil
}
type VolumeServer struct {
name string
listener net.Listener
log *zap.SugaredLogger
}
func NewVolumeServer(name string, options ...Option) (*VolumeServer, error) {
opts := newOptions()
for _, o := range options {
o(opts)
}
if err := os.MkdirAll(opts.socketDir, 0755); err != nil {
return nil, fmt.Errorf("failed to create directory for %s plugin: %v", name, err)
}
path := filepath.Join(opts.socketDir, fmt.Sprintf("%s.sock", name))
listener, err := sockets.NewUnixSocket(path, syscall.Getgid())
if err != nil {
return nil, err
}
m := &VolumeServer{
name: name,
listener: listener,
log: opts.log,
}
return m, nil
}
func (m *VolumeServer) Serve(driver volume.Driver) error {
m.log.Infof("exposing %s volume plugin on %s", m.name, m.listener.Addr())
defer m.log.Infof("%s volume plugin has been stopped", m.name)
return volume.NewHandler(driver).Serve(m.listener)
}
func (m *VolumeServer) Close() error {
return m.listener.Close()
}