rclone/cmd/serve/docker/docker.go

84 lines
2.6 KiB
Go

// Package docker serves a remote suitable for use with docker volume api
package docker
import (
"context"
_ "embed"
"path/filepath"
"strings"
"syscall"
"github.com/spf13/cobra"
"github.com/rclone/rclone/cmd"
"github.com/rclone/rclone/cmd/mountlib"
"github.com/rclone/rclone/fs/config/flags"
"github.com/rclone/rclone/vfs"
"github.com/rclone/rclone/vfs/vfsflags"
)
var (
pluginName = "rclone"
pluginScope = "local"
baseDir = "/var/lib/docker-volumes/rclone"
sockDir = "/run/docker/plugins" //lint:ignore U1000 unused when not building linux
defSpecDir = "/etc/docker/plugins"
stateFile = "docker-plugin.state"
socketAddr = "" // TCP listening address or empty string for Unix socket
socketGid = syscall.Getgid()
canPersist = false // allows writing to config file
forgetState = false
noSpec = false
)
//go:embed docker.md
var longHelp string
// help returns the help string cleaned up to simplify appending
func help() string {
return strings.TrimSpace(longHelp) + "\n\n"
}
func init() {
cmdFlags := Command.Flags()
// Add command specific flags
flags.StringVarP(cmdFlags, &baseDir, "base-dir", "", baseDir, "Base directory for volumes", "")
flags.StringVarP(cmdFlags, &socketAddr, "socket-addr", "", socketAddr, "Address <host:port> or absolute path (default: /run/docker/plugins/rclone.sock)", "")
flags.IntVarP(cmdFlags, &socketGid, "socket-gid", "", socketGid, "GID for unix socket (default: current process GID)", "")
flags.BoolVarP(cmdFlags, &forgetState, "forget-state", "", forgetState, "Skip restoring previous state", "")
flags.BoolVarP(cmdFlags, &noSpec, "no-spec", "", noSpec, "Do not write spec file", "")
// Add common mount/vfs flags
mountlib.AddFlags(cmdFlags)
vfsflags.AddFlags(cmdFlags)
}
// Command definition for cobra
var Command = &cobra.Command{
Use: "docker",
Short: `Serve any remote on docker's volume plugin API.`,
Long: help() + vfs.Help(),
Annotations: map[string]string{
"versionIntroduced": "v1.56",
"groups": "Filter",
},
Run: func(command *cobra.Command, args []string) {
cmd.CheckArgs(0, 0, command, args)
cmd.Run(false, false, command, func() error {
ctx := context.Background()
drv, err := NewDriver(ctx, baseDir, nil, nil, false, forgetState)
if err != nil {
return err
}
srv := NewServer(drv)
if socketAddr == "" {
// Listen on unix socket at /run/docker/plugins/<pluginName>.sock
return srv.ServeUnix(pluginName, socketGid)
}
if filepath.IsAbs(socketAddr) {
// Listen on unix socket at given path
return srv.ServeUnix(socketAddr, socketGid)
}
return srv.ServeTCP(socketAddr, "", nil, noSpec)
})
},
}