340 lines
10 KiB
Go
340 lines
10 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/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/pkg/integration/checker"
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"github.com/go-check/check"
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)
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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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}
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type DockerExternalVolumeSuite struct {
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server *httptest.Server
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ds *DockerSuite
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d *Daemon
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ec *eventCounter
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}
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func (s *DockerExternalVolumeSuite) SetUpTest(c *check.C) {
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s.d = NewDaemon(c)
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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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s.d.Stop()
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s.ds.TearDownTest(c)
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}
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func (s *DockerExternalVolumeSuite) SetUpSuite(c *check.C) {
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mux := http.NewServeMux()
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s.server = httptest.NewServer(mux)
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type pluginRequest struct {
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name string
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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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w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")
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fmt.Fprintln(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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w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")
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fmt.Fprintln(w, `{}`)
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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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w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")
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fmt.Fprintln(w, `{}`)
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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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var pr pluginRequest
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if err := json.NewDecoder(r.Body).Decode(&pr); err != nil {
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http.Error(w, err.Error(), 500)
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}
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p := hostVolumePath(pr.name)
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w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")
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fmt.Fprintln(w, fmt.Sprintf("{\"Mountpoint\": \"%s\"}", 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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var pr pluginRequest
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if err := json.NewDecoder(r.Body).Decode(&pr); err != nil {
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http.Error(w, err.Error(), 500)
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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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http.Error(w, err.Error(), 500)
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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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http.Error(w, err.Error(), 500)
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}
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w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")
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fmt.Fprintln(w, fmt.Sprintf("{\"Mountpoint\": \"%s\"}", 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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var pr pluginRequest
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if err := json.NewDecoder(r.Body).Decode(&pr); err != nil {
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http.Error(w, err.Error(), 500)
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}
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w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")
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fmt.Fprintln(w, `{}`)
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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/test-external-volume-driver.spec", []byte(s.server.URL), 0644)
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c.Assert(err, checker.IsNil)
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}
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func (s *DockerExternalVolumeSuite) TearDownSuite(c *check.C) {
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s.server.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) TestStartExternalNamedVolumeDriver(c *check.C) {
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err := s.d.StartWithBusybox()
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c.Assert(err, checker.IsNil)
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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")
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c.Assert(err, checker.IsNil)
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c.Assert(out, checker.Contains, s.server.URL)
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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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if !os.IsNotExist(err) {
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c.Fatalf("Expected volume path in host to not exist: %s, %v\n", p, err)
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}
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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) TestStartExternalVolumeUnnamedDriver(c *check.C) {
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err := s.d.StartWithBusybox()
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c.Assert(err, checker.IsNil)
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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")
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c.Assert(err, checker.IsNil)
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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) TestStartExternalVolumeDriverVolumesFrom(c *check.C) {
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err := s.d.StartWithBusybox()
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c.Assert(err, checker.IsNil)
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out, err := s.d.Cmd("run", "-d", "--name", "vol-test1", "-v", "/foo", "--volume-driver", "test-external-volume-driver", "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) TestStartExternalVolumeDriverDeleteContainer(c *check.C) {
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err := s.d.StartWithBusybox()
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c.Assert(err, checker.IsNil)
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out, err := s.d.Cmd("run", "-d", "--name", "vol-test1", "-v", "/foo", "--volume-driver", "test-external-volume-driver", "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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func (s *DockerExternalVolumeSuite) TestStartExternalNamedVolumeDriverCheckBindLocalVolume(c *check.C) {
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err := s.d.StartWithBusybox()
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c.Assert(err, checker.IsNil)
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expected := s.server.URL
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dockerfile := fmt.Sprintf(`FROM busybox:latest
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RUN mkdir /nobindthenlocalvol
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RUN echo %s > /nobindthenlocalvol/test
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VOLUME ["/nobindthenlocalvol"]`, expected)
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img := "test-checkbindlocalvolume"
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_, err = buildImageWithOutInDamon(s.d.sock(), img, dockerfile, true)
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c.Assert(err, checker.IsNil)
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out, err := s.d.Cmd("run", "--rm", "--name", "test-data-nobind", "-v", "external-volume-test:/tmp/external-volume-test", "--volume-driver", "test-external-volume-driver", img, "cat", "/nobindthenlocalvol/test")
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c.Assert(err, checker.IsNil)
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c.Assert(out, checker.Contains, expected)
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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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// Make sure a request to use a down driver doesn't block other requests
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func (s *DockerExternalVolumeSuite) TestStartExternalVolumeDriverLookupNotBlocked(c *check.C) {
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specPath := "/etc/docker/plugins/down-driver.spec"
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err := ioutil.WriteFile("/etc/docker/plugins/down-driver.spec", []byte("tcp://127.0.0.7:9999"), 0644)
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c.Assert(err, checker.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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c.Fatal("volume creates are blocked by previous create requests when previous driver is down")
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cmd2.Process.Kill()
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}
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}
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func (s *DockerExternalVolumeSuite) TestStartExternalVolumeDriverRetryNotImmediatelyExists(c *check.C) {
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err := s.d.StartWithBusybox()
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c.Assert(err, checker.IsNil)
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specPath := "/etc/docker/plugins/test-external-volume-driver-retry.spec"
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os.RemoveAll(specPath)
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defer os.RemoveAll(specPath)
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errchan := make(chan error)
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go func() {
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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", "test-external-volume-driver-retry", "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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go func() {
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// wait for a retry to occur, then create spec to allow plugin to register
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time.Sleep(2000 * time.Millisecond)
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if err := ioutil.WriteFile(specPath, []byte(s.server.URL), 0644); err != nil {
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c.Fatal(err)
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}
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}()
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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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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) TestStartExternalVolumeDriverBindExternalVolume(c *check.C) {
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dockerCmd(c, "volume", "create", "-d", "test-external-volume-driver", "--name", "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, err := inspectFieldJSON("testing", "Mounts")
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c.Assert(err, checker.IsNil)
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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, "test-external-volume-driver")
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}
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