// +build !windows package main import ( "encoding/json" "fmt" "io" "io/ioutil" "net/http" "net/http/httptest" "os" "os/exec" "path/filepath" "strings" "time" "github.com/docker/docker/pkg/integration/checker" "github.com/docker/engine-api/types" "github.com/go-check/check" ) func init() { check.Suite(&DockerExternalVolumeSuite{ ds: &DockerSuite{}, }) } type eventCounter struct { activations int creations int removals int mounts int unmounts int paths int lists int gets int } type DockerExternalVolumeSuite struct { server *httptest.Server ds *DockerSuite d *Daemon ec *eventCounter } func (s *DockerExternalVolumeSuite) SetUpTest(c *check.C) { s.d = NewDaemon(c) s.ec = &eventCounter{} } func (s *DockerExternalVolumeSuite) TearDownTest(c *check.C) { s.d.Stop() s.ds.TearDownTest(c) } func (s *DockerExternalVolumeSuite) SetUpSuite(c *check.C) { mux := http.NewServeMux() s.server = httptest.NewServer(mux) type pluginRequest struct { Name string Opts map[string]string } type pluginResp struct { Mountpoint string `json:",omitempty"` Err string `json:",omitempty"` } type vol struct { Name string Mountpoint string Ninja bool // hack used to trigger an null volume return on `Get` } var volList []vol read := func(b io.ReadCloser) (pluginRequest, error) { defer b.Close() var pr pluginRequest if err := json.NewDecoder(b).Decode(&pr); err != nil { return pr, err } return pr, nil } send := func(w http.ResponseWriter, data interface{}) { switch t := data.(type) { case error: http.Error(w, t.Error(), 500) case string: w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json") fmt.Fprintln(w, t) default: w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json") json.NewEncoder(w).Encode(&data) } } mux.HandleFunc("/Plugin.Activate", func(w http.ResponseWriter, r *http.Request) { s.ec.activations++ send(w, `{"Implements": ["VolumeDriver"]}`) }) mux.HandleFunc("/VolumeDriver.Create", func(w http.ResponseWriter, r *http.Request) { s.ec.creations++ pr, err := read(r.Body) if err != nil { send(w, err) return } _, isNinja := pr.Opts["ninja"] volList = append(volList, vol{Name: pr.Name, Ninja: isNinja}) send(w, nil) }) mux.HandleFunc("/VolumeDriver.List", func(w http.ResponseWriter, r *http.Request) { s.ec.lists++ vols := []vol{} for _, v := range volList { if v.Ninja { continue } vols = append(vols, v) } send(w, map[string][]vol{"Volumes": vols}) }) mux.HandleFunc("/VolumeDriver.Get", func(w http.ResponseWriter, r *http.Request) { s.ec.gets++ pr, err := read(r.Body) if err != nil { send(w, err) return } for _, v := range volList { if v.Name == pr.Name { if v.Ninja { send(w, map[string]vol{}) return } v.Mountpoint = hostVolumePath(pr.Name) send(w, map[string]vol{"Volume": v}) return } } send(w, `{"Err": "no such volume"}`) }) mux.HandleFunc("/VolumeDriver.Remove", func(w http.ResponseWriter, r *http.Request) { s.ec.removals++ pr, err := read(r.Body) if err != nil { send(w, err) return } for i, v := range volList { if v.Name == pr.Name { if err := os.RemoveAll(hostVolumePath(v.Name)); err != nil { send(w, &pluginResp{Err: err.Error()}) return } volList = append(volList[:i], volList[i+1:]...) break } } send(w, nil) }) mux.HandleFunc("/VolumeDriver.Path", func(w http.ResponseWriter, r *http.Request) { s.ec.paths++ pr, err := read(r.Body) if err != nil { send(w, err) return } p := hostVolumePath(pr.Name) send(w, &pluginResp{Mountpoint: p}) }) mux.HandleFunc("/VolumeDriver.Mount", func(w http.ResponseWriter, r *http.Request) { s.ec.mounts++ pr, err := read(r.Body) if err != nil { send(w, err) return } p := hostVolumePath(pr.Name) if err := os.MkdirAll(p, 0755); err != nil { send(w, &pluginResp{Err: err.Error()}) return } if err := ioutil.WriteFile(filepath.Join(p, "test"), []byte(s.server.URL), 0644); err != nil { send(w, err) return } send(w, &pluginResp{Mountpoint: p}) }) mux.HandleFunc("/VolumeDriver.Unmount", func(w http.ResponseWriter, r *http.Request) { s.ec.unmounts++ _, err := read(r.Body) if err != nil { send(w, err) return } send(w, nil) }) err := os.MkdirAll("/etc/docker/plugins", 0755) c.Assert(err, checker.IsNil) err = ioutil.WriteFile("/etc/docker/plugins/test-external-volume-driver.spec", []byte(s.server.URL), 0644) c.Assert(err, checker.IsNil) } func (s *DockerExternalVolumeSuite) TearDownSuite(c *check.C) { s.server.Close() err := os.RemoveAll("/etc/docker/plugins") c.Assert(err, checker.IsNil) } func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverNamed(c *check.C) { err := s.d.StartWithBusybox() c.Assert(err, checker.IsNil) out, err := s.d.Cmd("run", "--rm", "--name", "test-data", "-v", "external-volume-test:/tmp/external-volume-test", "--volume-driver", "test-external-volume-driver", "busybox:latest", "cat", "/tmp/external-volume-test/test") c.Assert(err, checker.IsNil, check.Commentf(out)) c.Assert(out, checker.Contains, s.server.URL) _, err = s.d.Cmd("volume", "rm", "external-volume-test") c.Assert(err, checker.IsNil) p := hostVolumePath("external-volume-test") _, err = os.Lstat(p) c.Assert(err, checker.NotNil) c.Assert(os.IsNotExist(err), checker.True, check.Commentf("Expected volume path in host to not exist: %s, %v\n", p, err)) c.Assert(s.ec.activations, checker.Equals, 1) c.Assert(s.ec.creations, checker.Equals, 1) c.Assert(s.ec.removals, checker.Equals, 1) c.Assert(s.ec.mounts, checker.Equals, 1) c.Assert(s.ec.unmounts, checker.Equals, 1) } func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverUnnamed(c *check.C) { err := s.d.StartWithBusybox() c.Assert(err, checker.IsNil) out, err := s.d.Cmd("run", "--rm", "--name", "test-data", "-v", "/tmp/external-volume-test", "--volume-driver", "test-external-volume-driver", "busybox:latest", "cat", "/tmp/external-volume-test/test") c.Assert(err, checker.IsNil, check.Commentf(out)) c.Assert(out, checker.Contains, s.server.URL) c.Assert(s.ec.activations, checker.Equals, 1) c.Assert(s.ec.creations, checker.Equals, 1) c.Assert(s.ec.removals, checker.Equals, 1) c.Assert(s.ec.mounts, checker.Equals, 1) c.Assert(s.ec.unmounts, checker.Equals, 1) } func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverVolumesFrom(c *check.C) { err := s.d.StartWithBusybox() c.Assert(err, checker.IsNil) out, err := s.d.Cmd("run", "--name", "vol-test1", "-v", "/foo", "--volume-driver", "test-external-volume-driver", "busybox:latest") c.Assert(err, checker.IsNil, check.Commentf(out)) out, err = s.d.Cmd("run", "--rm", "--volumes-from", "vol-test1", "--name", "vol-test2", "busybox", "ls", "/tmp") c.Assert(err, checker.IsNil, check.Commentf(out)) out, err = s.d.Cmd("rm", "-fv", "vol-test1") c.Assert(err, checker.IsNil, check.Commentf(out)) c.Assert(s.ec.activations, checker.Equals, 1) c.Assert(s.ec.creations, checker.Equals, 1) c.Assert(s.ec.removals, checker.Equals, 1) c.Assert(s.ec.mounts, checker.Equals, 2) c.Assert(s.ec.unmounts, checker.Equals, 2) } func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverDeleteContainer(c *check.C) { err := s.d.StartWithBusybox() c.Assert(err, checker.IsNil) out, err := s.d.Cmd("run", "--name", "vol-test1", "-v", "/foo", "--volume-driver", "test-external-volume-driver", "busybox:latest") c.Assert(err, checker.IsNil, check.Commentf(out)) out, err = s.d.Cmd("rm", "-fv", "vol-test1") c.Assert(err, checker.IsNil, check.Commentf(out)) c.Assert(s.ec.activations, checker.Equals, 1) c.Assert(s.ec.creations, checker.Equals, 1) c.Assert(s.ec.removals, checker.Equals, 1) c.Assert(s.ec.mounts, checker.Equals, 1) c.Assert(s.ec.unmounts, checker.Equals, 1) } func hostVolumePath(name string) string { return fmt.Sprintf("/var/lib/docker/volumes/%s", name) } // Make sure a request to use a down driver doesn't block other requests func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverLookupNotBlocked(c *check.C) { specPath := "/etc/docker/plugins/down-driver.spec" err := ioutil.WriteFile(specPath, []byte("tcp://127.0.0.7:9999"), 0644) c.Assert(err, check.IsNil) defer os.RemoveAll(specPath) chCmd1 := make(chan struct{}) chCmd2 := make(chan error) cmd1 := exec.Command(dockerBinary, "volume", "create", "-d", "down-driver") cmd2 := exec.Command(dockerBinary, "volume", "create") c.Assert(cmd1.Start(), checker.IsNil) defer cmd1.Process.Kill() time.Sleep(100 * time.Millisecond) // ensure API has been called c.Assert(cmd2.Start(), checker.IsNil) go func() { cmd1.Wait() close(chCmd1) }() go func() { chCmd2 <- cmd2.Wait() }() select { case <-chCmd1: cmd2.Process.Kill() c.Fatalf("volume create with down driver finished unexpectedly") case err := <-chCmd2: c.Assert(err, checker.IsNil) case <-time.After(5 * time.Second): cmd2.Process.Kill() c.Fatal("volume creates are blocked by previous create requests when previous driver is down") } } func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverRetryNotImmediatelyExists(c *check.C) { err := s.d.StartWithBusybox() c.Assert(err, checker.IsNil) specPath := "/etc/docker/plugins/test-external-volume-driver-retry.spec" os.RemoveAll(specPath) defer os.RemoveAll(specPath) errchan := make(chan error) go func() { if out, err := s.d.Cmd("run", "--rm", "--name", "test-data-retry", "-v", "external-volume-test:/tmp/external-volume-test", "--volume-driver", "test-external-volume-driver-retry", "busybox:latest"); err != nil { errchan <- fmt.Errorf("%v:\n%s", err, out) } close(errchan) }() go func() { // wait for a retry to occur, then create spec to allow plugin to register time.Sleep(2000 * time.Millisecond) // no need to check for an error here since it will get picked up by the timeout later ioutil.WriteFile(specPath, []byte(s.server.URL), 0644) }() select { case err := <-errchan: c.Assert(err, checker.IsNil) case <-time.After(8 * time.Second): c.Fatal("volume creates fail when plugin not immediately available") } _, err = s.d.Cmd("volume", "rm", "external-volume-test") c.Assert(err, checker.IsNil) c.Assert(s.ec.activations, checker.Equals, 1) c.Assert(s.ec.creations, checker.Equals, 1) c.Assert(s.ec.removals, checker.Equals, 1) c.Assert(s.ec.mounts, checker.Equals, 1) c.Assert(s.ec.unmounts, checker.Equals, 1) } func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverBindExternalVolume(c *check.C) { dockerCmd(c, "volume", "create", "-d", "test-external-volume-driver", "--name", "foo") dockerCmd(c, "run", "-d", "--name", "testing", "-v", "foo:/bar", "busybox", "top") var mounts []struct { Name string Driver string } out := inspectFieldJSON(c, "testing", "Mounts") c.Assert(json.NewDecoder(strings.NewReader(out)).Decode(&mounts), checker.IsNil) c.Assert(len(mounts), checker.Equals, 1, check.Commentf(out)) c.Assert(mounts[0].Name, checker.Equals, "foo") c.Assert(mounts[0].Driver, checker.Equals, "test-external-volume-driver") } func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverList(c *check.C) { dockerCmd(c, "volume", "create", "-d", "test-external-volume-driver", "--name", "abc3") out, _ := dockerCmd(c, "volume", "ls") ls := strings.Split(strings.TrimSpace(out), "\n") c.Assert(len(ls), check.Equals, 2, check.Commentf("\n%s", out)) vol := strings.Fields(ls[len(ls)-1]) c.Assert(len(vol), check.Equals, 2, check.Commentf("%v", vol)) c.Assert(vol[0], check.Equals, "test-external-volume-driver") c.Assert(vol[1], check.Equals, "abc3") c.Assert(s.ec.lists, check.Equals, 1) } func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverGet(c *check.C) { out, _, err := dockerCmdWithError("volume", "inspect", "dummy") c.Assert(err, check.NotNil, check.Commentf(out)) c.Assert(s.ec.gets, check.Equals, 1) c.Assert(out, checker.Contains, "No such volume") } func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverWithDaemnRestart(c *check.C) { dockerCmd(c, "volume", "create", "-d", "test-external-volume-driver", "--name", "abc1") err := s.d.Restart() c.Assert(err, checker.IsNil) dockerCmd(c, "run", "--name=test", "-v", "abc1:/foo", "busybox", "true") var mounts []types.MountPoint inspectFieldAndMarshall(c, "test", "Mounts", &mounts) c.Assert(mounts, checker.HasLen, 1) c.Assert(mounts[0].Driver, checker.Equals, "test-external-volume-driver") } // Ensures that the daemon handles when the plugin responds to a `Get` request with a null volume and a null error. // Prior the daemon would panic in this scenario. func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverGetEmptyResponse(c *check.C) { dockerCmd(c, "volume", "create", "-d", "test-external-volume-driver", "--name", "abc2", "--opt", "ninja=1") out, _, err := dockerCmdWithError("volume", "inspect", "abc2") c.Assert(err, checker.NotNil, check.Commentf(out)) c.Assert(out, checker.Contains, "No such volume") }