618 lines
19 KiB
Go
618 lines
19 KiB
Go
// +build !windows
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package main
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import (
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"encoding/json"
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"net/http/httptest"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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"time"
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"github.com/docker/docker/api/types"
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"github.com/docker/docker/integration-cli/checker"
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"github.com/docker/docker/integration-cli/daemon"
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"github.com/docker/docker/pkg/stringid"
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"github.com/docker/docker/volume"
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"github.com/go-check/check"
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)
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const volumePluginName = "test-external-volume-driver"
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func init() {
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check.Suite(&DockerExternalVolumeSuite{
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ds: &DockerSuite{},
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})
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}
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type eventCounter struct {
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activations int
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creations int
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removals int
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mounts int
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unmounts int
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paths int
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lists int
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gets int
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caps int
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}
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type DockerExternalVolumeSuite struct {
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ds *DockerSuite
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d *daemon.Daemon
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*volumePlugin
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}
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func (s *DockerExternalVolumeSuite) SetUpTest(c *check.C) {
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s.d = daemon.New(c, dockerBinary, dockerdBinary, daemon.Config{
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Experimental: testEnv.ExperimentalDaemon(),
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})
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s.ec = &eventCounter{}
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}
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func (s *DockerExternalVolumeSuite) TearDownTest(c *check.C) {
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if s.d != nil {
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s.d.Stop(c)
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s.ds.TearDownTest(c)
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}
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}
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func (s *DockerExternalVolumeSuite) SetUpSuite(c *check.C) {
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s.volumePlugin = newVolumePlugin(c, volumePluginName)
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}
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type volumePlugin struct {
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ec *eventCounter
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*httptest.Server
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vols map[string]vol
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}
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type vol struct {
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Name string
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Mountpoint string
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Ninja bool // hack used to trigger a null volume return on `Get`
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Status map[string]interface{}
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Options map[string]string
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}
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func (p *volumePlugin) Close() {
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p.Server.Close()
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}
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func newVolumePlugin(c *check.C, name string) *volumePlugin {
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mux := http.NewServeMux()
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s := &volumePlugin{Server: httptest.NewServer(mux), ec: &eventCounter{}, vols: make(map[string]vol)}
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type pluginRequest struct {
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Name string
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Opts map[string]string
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ID string
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}
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type pluginResp struct {
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Mountpoint string `json:",omitempty"`
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Err string `json:",omitempty"`
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}
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read := func(b io.ReadCloser) (pluginRequest, error) {
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defer b.Close()
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var pr pluginRequest
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err := json.NewDecoder(b).Decode(&pr)
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return pr, err
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}
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send := func(w http.ResponseWriter, data interface{}) {
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switch t := data.(type) {
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case error:
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http.Error(w, t.Error(), 500)
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case string:
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w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")
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fmt.Fprintln(w, t)
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default:
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w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")
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json.NewEncoder(w).Encode(&data)
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}
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}
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mux.HandleFunc("/Plugin.Activate", func(w http.ResponseWriter, r *http.Request) {
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s.ec.activations++
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send(w, `{"Implements": ["VolumeDriver"]}`)
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})
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mux.HandleFunc("/VolumeDriver.Create", func(w http.ResponseWriter, r *http.Request) {
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s.ec.creations++
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pr, err := read(r.Body)
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if err != nil {
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send(w, err)
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return
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}
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_, isNinja := pr.Opts["ninja"]
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status := map[string]interface{}{"Hello": "world"}
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s.vols[pr.Name] = vol{Name: pr.Name, Ninja: isNinja, Status: status, Options: pr.Opts}
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send(w, nil)
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})
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mux.HandleFunc("/VolumeDriver.List", func(w http.ResponseWriter, r *http.Request) {
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s.ec.lists++
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vols := make([]vol, 0, len(s.vols))
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for _, v := range s.vols {
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if v.Ninja {
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continue
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}
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vols = append(vols, v)
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}
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send(w, map[string][]vol{"Volumes": vols})
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})
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mux.HandleFunc("/VolumeDriver.Get", func(w http.ResponseWriter, r *http.Request) {
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s.ec.gets++
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pr, err := read(r.Body)
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if err != nil {
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send(w, err)
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return
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}
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v, exists := s.vols[pr.Name]
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if !exists {
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send(w, `{"Err": "no such volume"}`)
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}
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if v.Ninja {
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send(w, map[string]vol{})
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return
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}
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v.Mountpoint = hostVolumePath(pr.Name)
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send(w, map[string]vol{"Volume": v})
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return
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})
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mux.HandleFunc("/VolumeDriver.Remove", func(w http.ResponseWriter, r *http.Request) {
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s.ec.removals++
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pr, err := read(r.Body)
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if err != nil {
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send(w, err)
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return
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}
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v, ok := s.vols[pr.Name]
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if !ok {
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send(w, nil)
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return
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}
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if err := os.RemoveAll(hostVolumePath(v.Name)); err != nil {
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send(w, &pluginResp{Err: err.Error()})
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return
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}
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delete(s.vols, v.Name)
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send(w, nil)
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})
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mux.HandleFunc("/VolumeDriver.Path", func(w http.ResponseWriter, r *http.Request) {
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s.ec.paths++
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pr, err := read(r.Body)
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if err != nil {
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send(w, err)
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return
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}
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p := hostVolumePath(pr.Name)
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send(w, &pluginResp{Mountpoint: p})
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})
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mux.HandleFunc("/VolumeDriver.Mount", func(w http.ResponseWriter, r *http.Request) {
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s.ec.mounts++
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pr, err := read(r.Body)
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if err != nil {
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send(w, err)
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return
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}
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if v, exists := s.vols[pr.Name]; exists {
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// Use this to simulate a mount failure
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if _, exists := v.Options["invalidOption"]; exists {
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send(w, fmt.Errorf("invalid argument"))
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return
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}
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}
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p := hostVolumePath(pr.Name)
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if err := os.MkdirAll(p, 0755); err != nil {
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send(w, &pluginResp{Err: err.Error()})
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return
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}
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if err := ioutil.WriteFile(filepath.Join(p, "test"), []byte(s.Server.URL), 0644); err != nil {
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send(w, err)
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return
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}
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if err := ioutil.WriteFile(filepath.Join(p, "mountID"), []byte(pr.ID), 0644); err != nil {
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send(w, err)
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return
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}
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send(w, &pluginResp{Mountpoint: p})
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})
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mux.HandleFunc("/VolumeDriver.Unmount", func(w http.ResponseWriter, r *http.Request) {
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s.ec.unmounts++
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_, err := read(r.Body)
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if err != nil {
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send(w, err)
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return
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}
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send(w, nil)
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})
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mux.HandleFunc("/VolumeDriver.Capabilities", func(w http.ResponseWriter, r *http.Request) {
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s.ec.caps++
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_, err := read(r.Body)
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if err != nil {
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send(w, err)
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return
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}
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send(w, `{"Capabilities": { "Scope": "global" }}`)
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})
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err := os.MkdirAll("/etc/docker/plugins", 0755)
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c.Assert(err, checker.IsNil)
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err = ioutil.WriteFile("/etc/docker/plugins/"+name+".spec", []byte(s.Server.URL), 0644)
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c.Assert(err, checker.IsNil)
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return s
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}
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func (s *DockerExternalVolumeSuite) TearDownSuite(c *check.C) {
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s.volumePlugin.Close()
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err := os.RemoveAll("/etc/docker/plugins")
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c.Assert(err, checker.IsNil)
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}
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func (s *DockerExternalVolumeSuite) TestVolumeCLICreateOptionConflict(c *check.C) {
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dockerCmd(c, "volume", "create", "test")
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out, _, err := dockerCmdWithError("volume", "create", "test", "--driver", volumePluginName)
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c.Assert(err, check.NotNil, check.Commentf("volume create exception name already in use with another driver"))
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c.Assert(out, checker.Contains, "A volume named test already exists")
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out, _ = dockerCmd(c, "volume", "inspect", "--format={{ .Driver }}", "test")
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_, _, err = dockerCmdWithError("volume", "create", "test", "--driver", strings.TrimSpace(out))
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c.Assert(err, check.IsNil)
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}
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func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverNamed(c *check.C) {
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s.d.StartWithBusybox(c)
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out, err := s.d.Cmd("run", "--rm", "--name", "test-data", "-v", "external-volume-test:/tmp/external-volume-test", "--volume-driver", volumePluginName, "busybox:latest", "cat", "/tmp/external-volume-test/test")
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c.Assert(err, checker.IsNil, check.Commentf(out))
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c.Assert(out, checker.Contains, s.Server.URL)
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_, err = s.d.Cmd("volume", "rm", "external-volume-test")
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c.Assert(err, checker.IsNil)
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p := hostVolumePath("external-volume-test")
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_, err = os.Lstat(p)
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c.Assert(err, checker.NotNil)
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c.Assert(os.IsNotExist(err), checker.True, check.Commentf("Expected volume path in host to not exist: %s, %v\n", p, err))
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c.Assert(s.ec.activations, checker.Equals, 1)
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c.Assert(s.ec.creations, checker.Equals, 1)
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c.Assert(s.ec.removals, checker.Equals, 1)
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c.Assert(s.ec.mounts, checker.Equals, 1)
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c.Assert(s.ec.unmounts, checker.Equals, 1)
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}
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func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverUnnamed(c *check.C) {
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s.d.StartWithBusybox(c)
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out, err := s.d.Cmd("run", "--rm", "--name", "test-data", "-v", "/tmp/external-volume-test", "--volume-driver", volumePluginName, "busybox:latest", "cat", "/tmp/external-volume-test/test")
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c.Assert(err, checker.IsNil, check.Commentf(out))
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c.Assert(out, checker.Contains, s.Server.URL)
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c.Assert(s.ec.activations, checker.Equals, 1)
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c.Assert(s.ec.creations, checker.Equals, 1)
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c.Assert(s.ec.removals, checker.Equals, 1)
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c.Assert(s.ec.mounts, checker.Equals, 1)
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c.Assert(s.ec.unmounts, checker.Equals, 1)
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}
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func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverVolumesFrom(c *check.C) {
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s.d.StartWithBusybox(c)
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out, err := s.d.Cmd("run", "--name", "vol-test1", "-v", "/foo", "--volume-driver", volumePluginName, "busybox:latest")
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c.Assert(err, checker.IsNil, check.Commentf(out))
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out, err = s.d.Cmd("run", "--rm", "--volumes-from", "vol-test1", "--name", "vol-test2", "busybox", "ls", "/tmp")
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c.Assert(err, checker.IsNil, check.Commentf(out))
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out, err = s.d.Cmd("rm", "-fv", "vol-test1")
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c.Assert(err, checker.IsNil, check.Commentf(out))
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c.Assert(s.ec.activations, checker.Equals, 1)
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c.Assert(s.ec.creations, checker.Equals, 1)
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c.Assert(s.ec.removals, checker.Equals, 1)
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c.Assert(s.ec.mounts, checker.Equals, 2)
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c.Assert(s.ec.unmounts, checker.Equals, 2)
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}
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func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverDeleteContainer(c *check.C) {
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s.d.StartWithBusybox(c)
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out, err := s.d.Cmd("run", "--name", "vol-test1", "-v", "/foo", "--volume-driver", volumePluginName, "busybox:latest")
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c.Assert(err, checker.IsNil, check.Commentf(out))
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out, err = s.d.Cmd("rm", "-fv", "vol-test1")
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c.Assert(err, checker.IsNil, check.Commentf(out))
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c.Assert(s.ec.activations, checker.Equals, 1)
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c.Assert(s.ec.creations, checker.Equals, 1)
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c.Assert(s.ec.removals, checker.Equals, 1)
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c.Assert(s.ec.mounts, checker.Equals, 1)
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c.Assert(s.ec.unmounts, checker.Equals, 1)
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}
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func hostVolumePath(name string) string {
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return fmt.Sprintf("/var/lib/docker/volumes/%s", name)
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}
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// Make sure a request to use a down driver doesn't block other requests
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func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverLookupNotBlocked(c *check.C) {
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specPath := "/etc/docker/plugins/down-driver.spec"
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err := ioutil.WriteFile(specPath, []byte("tcp://127.0.0.7:9999"), 0644)
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c.Assert(err, check.IsNil)
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defer os.RemoveAll(specPath)
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chCmd1 := make(chan struct{})
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chCmd2 := make(chan error)
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cmd1 := exec.Command(dockerBinary, "volume", "create", "-d", "down-driver")
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cmd2 := exec.Command(dockerBinary, "volume", "create")
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c.Assert(cmd1.Start(), checker.IsNil)
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defer cmd1.Process.Kill()
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time.Sleep(100 * time.Millisecond) // ensure API has been called
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c.Assert(cmd2.Start(), checker.IsNil)
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go func() {
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cmd1.Wait()
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close(chCmd1)
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}()
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go func() {
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chCmd2 <- cmd2.Wait()
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}()
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select {
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case <-chCmd1:
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cmd2.Process.Kill()
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c.Fatalf("volume create with down driver finished unexpectedly")
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case err := <-chCmd2:
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c.Assert(err, checker.IsNil)
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case <-time.After(5 * time.Second):
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cmd2.Process.Kill()
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c.Fatal("volume creates are blocked by previous create requests when previous driver is down")
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}
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}
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func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverRetryNotImmediatelyExists(c *check.C) {
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s.d.StartWithBusybox(c)
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driverName := "test-external-volume-driver-retry"
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errchan := make(chan error)
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started := make(chan struct{})
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go func() {
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close(started)
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if out, err := s.d.Cmd("run", "--rm", "--name", "test-data-retry", "-v", "external-volume-test:/tmp/external-volume-test", "--volume-driver", driverName, "busybox:latest"); err != nil {
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errchan <- fmt.Errorf("%v:\n%s", err, out)
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}
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close(errchan)
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}()
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<-started
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// wait for a retry to occur, then create spec to allow plugin to register
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time.Sleep(2 * time.Second)
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p := newVolumePlugin(c, driverName)
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defer p.Close()
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select {
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case err := <-errchan:
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c.Assert(err, checker.IsNil)
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case <-time.After(8 * time.Second):
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c.Fatal("volume creates fail when plugin not immediately available")
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}
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_, err := s.d.Cmd("volume", "rm", "external-volume-test")
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c.Assert(err, checker.IsNil)
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c.Assert(p.ec.activations, checker.Equals, 1)
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c.Assert(p.ec.creations, checker.Equals, 1)
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c.Assert(p.ec.removals, checker.Equals, 1)
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c.Assert(p.ec.mounts, checker.Equals, 1)
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c.Assert(p.ec.unmounts, checker.Equals, 1)
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}
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func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverBindExternalVolume(c *check.C) {
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dockerCmd(c, "volume", "create", "-d", volumePluginName, "foo")
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dockerCmd(c, "run", "-d", "--name", "testing", "-v", "foo:/bar", "busybox", "top")
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var mounts []struct {
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Name string
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Driver string
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}
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out := inspectFieldJSON(c, "testing", "Mounts")
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c.Assert(json.NewDecoder(strings.NewReader(out)).Decode(&mounts), checker.IsNil)
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c.Assert(len(mounts), checker.Equals, 1, check.Commentf(out))
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c.Assert(mounts[0].Name, checker.Equals, "foo")
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c.Assert(mounts[0].Driver, checker.Equals, volumePluginName)
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}
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func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverList(c *check.C) {
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dockerCmd(c, "volume", "create", "-d", volumePluginName, "abc3")
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out, _ := dockerCmd(c, "volume", "ls")
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ls := strings.Split(strings.TrimSpace(out), "\n")
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c.Assert(len(ls), check.Equals, 2, check.Commentf("\n%s", out))
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vol := strings.Fields(ls[len(ls)-1])
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c.Assert(len(vol), check.Equals, 2, check.Commentf("%v", vol))
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c.Assert(vol[0], check.Equals, volumePluginName)
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c.Assert(vol[1], check.Equals, "abc3")
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c.Assert(s.ec.lists, check.Equals, 1)
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}
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func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverGet(c *check.C) {
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out, _, err := dockerCmdWithError("volume", "inspect", "dummy")
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c.Assert(err, check.NotNil, check.Commentf(out))
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c.Assert(out, checker.Contains, "No such volume")
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c.Assert(s.ec.gets, check.Equals, 1)
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dockerCmd(c, "volume", "create", "test", "-d", volumePluginName)
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out, _ = dockerCmd(c, "volume", "inspect", "test")
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type vol struct {
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Status map[string]string
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}
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var st []vol
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|
c.Assert(json.Unmarshal([]byte(out), &st), checker.IsNil)
|
|
c.Assert(st, checker.HasLen, 1)
|
|
c.Assert(st[0].Status, checker.HasLen, 1, check.Commentf("%v", st[0]))
|
|
c.Assert(st[0].Status["Hello"], checker.Equals, "world", check.Commentf("%v", st[0].Status))
|
|
}
|
|
|
|
func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverWithDaemonRestart(c *check.C) {
|
|
dockerCmd(c, "volume", "create", "-d", volumePluginName, "abc1")
|
|
s.d.Restart(c)
|
|
|
|
dockerCmd(c, "run", "--name=test", "-v", "abc1:/foo", "busybox", "true")
|
|
var mounts []types.MountPoint
|
|
inspectFieldAndUnmarshall(c, "test", "Mounts", &mounts)
|
|
c.Assert(mounts, checker.HasLen, 1)
|
|
c.Assert(mounts[0].Driver, checker.Equals, volumePluginName)
|
|
}
|
|
|
|
// 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) {
|
|
s.d.Start(c)
|
|
|
|
out, err := s.d.Cmd("volume", "create", "-d", volumePluginName, "abc2", "--opt", "ninja=1")
|
|
c.Assert(err, checker.IsNil, check.Commentf(out))
|
|
|
|
out, err = s.d.Cmd("volume", "inspect", "abc2")
|
|
c.Assert(err, checker.NotNil, check.Commentf(out))
|
|
c.Assert(out, checker.Contains, "No such volume")
|
|
}
|
|
|
|
// Ensure only cached paths are used in volume list to prevent N+1 calls to `VolumeDriver.Path`
|
|
func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverPathCalls(c *check.C) {
|
|
s.d.Start(c)
|
|
c.Assert(s.ec.paths, checker.Equals, 0)
|
|
|
|
out, err := s.d.Cmd("volume", "create", "test", "--driver=test-external-volume-driver")
|
|
c.Assert(err, checker.IsNil, check.Commentf(out))
|
|
c.Assert(s.ec.paths, checker.Equals, 1)
|
|
|
|
out, err = s.d.Cmd("volume", "ls")
|
|
c.Assert(err, checker.IsNil, check.Commentf(out))
|
|
c.Assert(s.ec.paths, checker.Equals, 1)
|
|
|
|
out, err = s.d.Cmd("volume", "inspect", "--format='{{.Mountpoint}}'", "test")
|
|
c.Assert(err, checker.IsNil, check.Commentf(out))
|
|
c.Assert(strings.TrimSpace(out), checker.Not(checker.Equals), "")
|
|
c.Assert(s.ec.paths, checker.Equals, 1)
|
|
}
|
|
|
|
func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverMountID(c *check.C) {
|
|
s.d.StartWithBusybox(c)
|
|
|
|
out, err := s.d.Cmd("run", "--rm", "-v", "external-volume-test:/tmp/external-volume-test", "--volume-driver", volumePluginName, "busybox:latest", "cat", "/tmp/external-volume-test/test")
|
|
c.Assert(err, checker.IsNil, check.Commentf(out))
|
|
c.Assert(strings.TrimSpace(out), checker.Not(checker.Equals), "")
|
|
}
|
|
|
|
// Check that VolumeDriver.Capabilities gets called, and only called once
|
|
func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverCapabilities(c *check.C) {
|
|
s.d.Start(c)
|
|
c.Assert(s.ec.caps, checker.Equals, 0)
|
|
|
|
for i := 0; i < 3; i++ {
|
|
out, err := s.d.Cmd("volume", "create", "-d", volumePluginName, fmt.Sprintf("test%d", i))
|
|
c.Assert(err, checker.IsNil, check.Commentf(out))
|
|
c.Assert(s.ec.caps, checker.Equals, 1)
|
|
out, err = s.d.Cmd("volume", "inspect", "--format={{.Scope}}", fmt.Sprintf("test%d", i))
|
|
c.Assert(err, checker.IsNil)
|
|
c.Assert(strings.TrimSpace(out), checker.Equals, volume.GlobalScope)
|
|
}
|
|
}
|
|
|
|
func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverOutOfBandDelete(c *check.C) {
|
|
driverName := stringid.GenerateNonCryptoID()
|
|
p := newVolumePlugin(c, driverName)
|
|
defer p.Close()
|
|
|
|
s.d.StartWithBusybox(c)
|
|
|
|
out, err := s.d.Cmd("volume", "create", "-d", driverName, "--name", "test")
|
|
c.Assert(err, checker.IsNil, check.Commentf(out))
|
|
|
|
out, err = s.d.Cmd("volume", "create", "-d", "local", "--name", "test")
|
|
c.Assert(err, checker.NotNil, check.Commentf(out))
|
|
c.Assert(out, checker.Contains, "volume named test already exists")
|
|
|
|
// simulate out of band volume deletion on plugin level
|
|
delete(p.vols, "test")
|
|
|
|
// test re-create with same driver
|
|
out, err = s.d.Cmd("volume", "create", "-d", driverName, "--opt", "foo=bar", "--name", "test")
|
|
c.Assert(err, checker.IsNil, check.Commentf(out))
|
|
out, err = s.d.Cmd("volume", "inspect", "test")
|
|
c.Assert(err, checker.IsNil, check.Commentf(out))
|
|
|
|
var vs []types.Volume
|
|
err = json.Unmarshal([]byte(out), &vs)
|
|
c.Assert(err, checker.IsNil)
|
|
c.Assert(vs, checker.HasLen, 1)
|
|
c.Assert(vs[0].Driver, checker.Equals, driverName)
|
|
c.Assert(vs[0].Options, checker.NotNil)
|
|
c.Assert(vs[0].Options["foo"], checker.Equals, "bar")
|
|
c.Assert(vs[0].Driver, checker.Equals, driverName)
|
|
|
|
// simulate out of band volume deletion on plugin level
|
|
delete(p.vols, "test")
|
|
|
|
// test create with different driver
|
|
out, err = s.d.Cmd("volume", "create", "-d", "local", "--name", "test")
|
|
c.Assert(err, checker.IsNil, check.Commentf(out))
|
|
|
|
out, err = s.d.Cmd("volume", "inspect", "test")
|
|
c.Assert(err, checker.IsNil, check.Commentf(out))
|
|
vs = nil
|
|
err = json.Unmarshal([]byte(out), &vs)
|
|
c.Assert(err, checker.IsNil)
|
|
c.Assert(vs, checker.HasLen, 1)
|
|
c.Assert(vs[0].Options, checker.HasLen, 0)
|
|
c.Assert(vs[0].Driver, checker.Equals, "local")
|
|
}
|
|
|
|
func (s *DockerExternalVolumeSuite) TestExternalVolumeDriverUnmountOnMountFail(c *check.C) {
|
|
s.d.StartWithBusybox(c)
|
|
s.d.Cmd("volume", "create", "-d", "test-external-volume-driver", "--opt=invalidOption=1", "--name=testumount")
|
|
|
|
out, _ := s.d.Cmd("run", "-v", "testumount:/foo", "busybox", "true")
|
|
c.Assert(s.ec.unmounts, checker.Equals, 0, check.Commentf(out))
|
|
out, _ = s.d.Cmd("run", "-w", "/foo", "-v", "testumount:/foo", "busybox", "true")
|
|
c.Assert(s.ec.unmounts, checker.Equals, 0, check.Commentf(out))
|
|
}
|