/
main.go
58 lines (49 loc) · 1.32 KB
/
main.go
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package main
import (
"flag"
"fmt"
"log"
"net/http"
"os"
"path/filepath"
"github.com/calavera/docker-volume-vault/vault"
"github.com/docker/go-plugins-helpers/volume"
"github.com/hashicorp/vault/api"
"golang.org/x/sys/unix"
)
const id = "vault"
var (
defaultPath = filepath.Join(volume.DefaultDockerRootDirectory, id)
root = flag.String("root", defaultPath, "Docker volumes root directory")
url = flag.String("url", "", "Vault server URL")
token = flag.String("token", "", "Vault root token")
)
func main() {
var Usage = func() {
fmt.Fprintf(os.Stderr, "Usage: %s [options]\n", os.Args[0])
flag.PrintDefaults()
}
flag.Parse()
if *url == "" || *token == "" {
Usage()
os.Exit(1)
}
lockMemory()
vault.DefaultConfig = &api.Config{Address: *url, HttpClient: http.DefaultClient}
d := newDriver(*root, *token)
h := volume.NewHandler(d)
fmt.Println(h.ServeUnix("root", "vault"))
}
// Locks memory, preventing memory from being written to disk as swap
func lockMemory() {
err := unix.Mlockall(unix.MCL_FUTURE | unix.MCL_CURRENT)
switch err {
case nil:
case unix.ENOSYS:
log.Println("mlockall() not implemented on this system")
case unix.ENOMEM:
log.Println("mlockall() failed with ENOMEM")
default:
log.Fatalf("Could not perform mlockall and prevent swapping memory: %v", err)
}
}