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Make graphdriver plugin use plugin BasePath

Browse source 
Also enables `PropagatedMount` for graphdrivers.

Signed-off-by: Brian Goff <cpuguy83@gmail.com>
This commit is contained in:
Brian Goff 2016-12-10 11:40:01 -05:00
parent 8899c62ecf
commit 500210475f
6 changed files with 63 additions and 22 deletions
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6
daemon/graphdriver/driver.go
View file

@ -154,10 +154,12 @@ func GetDriver(name, home string, options []string, uidMaps, gidMaps []idtools.I
if initFunc, exists := drivers[name]; exists {
return initFunc(filepath.Join(home, name), options, uidMaps, gidMaps)
}
if pluginDriver, err := lookupPlugin(name, home, options, pg); err == nil {
pluginDriver, err := lookupPlugin(name, home, options, pg)
if err == nil {
return pluginDriver, nil
}
logrus.Errorf("Failed to GetDriver graph %s %s", name, home)
logrus.WithError(err).WithField("driver", name).WithField("home-dir", home).Error("Failed to GetDriver graph")
return nil, ErrNotSupported
}

10
daemon/graphdriver/plugin.go
View file

@ -6,6 +6,7 @@ import (
"path/filepath"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/plugin/v2"
)
type pluginClient interface {
@ -26,6 +27,13 @@ func lookupPlugin(name, home string, opts []string, pg plugingetter.PluginGetter
}
func newPluginDriver(name, home string, opts []string, pl plugingetter.CompatPlugin) (Driver, error) {
proxy := &graphDriverProxy{name, pl.Client(), pl}
if !pl.IsV1() {
if p, ok := pl.(*v2.Plugin); ok {
if p.PropagatedMount != "" {
home = p.PluginObj.Config.PropagatedMount
}
}
}
proxy := &graphDriverProxy{name, pl}
return proxy, proxy.Init(filepath.Join(home, name), opts)
}

36
daemon/graphdriver/proxy.go
View file

@ -4,15 +4,15 @@ import (
"errors"
"fmt"
"io"
"path/filepath"
"github.com/docker/docker/pkg/archive"
"github.com/docker/docker/pkg/plugingetter"
)
type graphDriverProxy struct {
name string
client pluginClient
p plugingetter.CompatPlugin
name string
p plugingetter.CompatPlugin
}
type graphDriverRequest struct {
@ -48,7 +48,7 @@ func (d *graphDriverProxy) Init(home string, opts []string) error {
Opts: opts,
}
var ret graphDriverResponse
if err := d.client.Call("GraphDriver.Init", args, &ret); err != nil {
if err := d.p.Client().Call("GraphDriver.Init", args, &ret); err != nil {
return err
}
if ret.Err != "" {
@ -73,7 +73,7 @@ func (d *graphDriverProxy) CreateReadWrite(id, parent string, opts *CreateOpts)
MountLabel: mountLabel,
}
var ret graphDriverResponse
if err := d.client.Call("GraphDriver.CreateReadWrite", args, &ret); err != nil {
if err := d.p.Client().Call("GraphDriver.CreateReadWrite", args, &ret); err != nil {
return err
}
if ret.Err != "" {
@ -93,7 +93,7 @@ func (d *graphDriverProxy) Create(id, parent string, opts *CreateOpts) error {
MountLabel: mountLabel,
}
var ret graphDriverResponse
if err := d.client.Call("GraphDriver.Create", args, &ret); err != nil {
if err := d.p.Client().Call("GraphDriver.Create", args, &ret); err != nil {
return err
}
if ret.Err != "" {
@ -105,7 +105,7 @@ func (d *graphDriverProxy) Create(id, parent string, opts *CreateOpts) error {
func (d *graphDriverProxy) Remove(id string) error {
args := &graphDriverRequest{ID: id}
var ret graphDriverResponse
if err := d.client.Call("GraphDriver.Remove", args, &ret); err != nil {
if err := d.p.Client().Call("GraphDriver.Remove", args, &ret); err != nil {
return err
}
if ret.Err != "" {
@ -120,20 +120,20 @@ func (d *graphDriverProxy) Get(id, mountLabel string) (string, error) {
MountLabel: mountLabel,
}
var ret graphDriverResponse
if err := d.client.Call("GraphDriver.Get", args, &ret); err != nil {
if err := d.p.Client().Call("GraphDriver.Get", args, &ret); err != nil {
return "", err
}
var err error
if ret.Err != "" {
err = errors.New(ret.Err)
}
return ret.Dir, err
return filepath.Join(d.p.BasePath(), ret.Dir), err
}
func (d *graphDriverProxy) Put(id string) error {
args := &graphDriverRequest{ID: id}
var ret graphDriverResponse
if err := d.client.Call("GraphDriver.Put", args, &ret); err != nil {
if err := d.p.Client().Call("GraphDriver.Put", args, &ret); err != nil {
return err
}
if ret.Err != "" {
@ -145,7 +145,7 @@ func (d *graphDriverProxy) Put(id string) error {
func (d *graphDriverProxy) Exists(id string) bool {
args := &graphDriverRequest{ID: id}
var ret graphDriverResponse
if err := d.client.Call("GraphDriver.Exists", args, &ret); err != nil {
if err := d.p.Client().Call("GraphDriver.Exists", args, &ret); err != nil {
return false
}
return ret.Exists
@ -154,7 +154,7 @@ func (d *graphDriverProxy) Exists(id string) bool {
func (d *graphDriverProxy) Status() [][2]string {
args := &graphDriverRequest{}
var ret graphDriverResponse
if err := d.client.Call("GraphDriver.Status", args, &ret); err != nil {
if err := d.p.Client().Call("GraphDriver.Status", args, &ret); err != nil {
return nil
}
return ret.Status
@ -165,7 +165,7 @@ func (d *graphDriverProxy) GetMetadata(id string) (map[string]string, error) {
ID: id,
}
var ret graphDriverResponse
if err := d.client.Call("GraphDriver.GetMetadata", args, &ret); err != nil {
if err := d.p.Client().Call("GraphDriver.GetMetadata", args, &ret); err != nil {
return nil, err
}
if ret.Err != "" {
@ -184,7 +184,7 @@ func (d *graphDriverProxy) Cleanup() error {
args := &graphDriverRequest{}
var ret graphDriverResponse
if err := d.client.Call("GraphDriver.Cleanup", args, &ret); err != nil {
if err := d.p.Client().Call("GraphDriver.Cleanup", args, &ret); err != nil {
return nil
}
if ret.Err != "" {
@ -198,7 +198,7 @@ func (d *graphDriverProxy) Diff(id, parent string) (io.ReadCloser, error) {
ID: id,
Parent: parent,
}
body, err := d.client.Stream("GraphDriver.Diff", args)
body, err := d.p.Client().Stream("GraphDriver.Diff", args)
if err != nil {
return nil, err
}
@ -211,7 +211,7 @@ func (d *graphDriverProxy) Changes(id, parent string) ([]archive.Change, error)
Parent: parent,
}
var ret graphDriverResponse
if err := d.client.Call("GraphDriver.Changes", args, &ret); err != nil {
if err := d.p.Client().Call("GraphDriver.Changes", args, &ret); err != nil {
return nil, err
}
if ret.Err != "" {
@ -223,7 +223,7 @@ func (d *graphDriverProxy) Changes(id, parent string) ([]archive.Change, error)
func (d *graphDriverProxy) ApplyDiff(id, parent string, diff io.Reader) (int64, error) {
var ret graphDriverResponse
if err := d.client.SendFile(fmt.Sprintf("GraphDriver.ApplyDiff?id=%s&parent=%s", id, parent), diff, &ret); err != nil {
if err := d.p.Client().SendFile(fmt.Sprintf("GraphDriver.ApplyDiff?id=%s&parent=%s", id, parent), diff, &ret); err != nil {
return -1, err
}
if ret.Err != "" {
@ -238,7 +238,7 @@ func (d *graphDriverProxy) DiffSize(id, parent string) (int64, error) {
Parent: parent,
}
var ret graphDriverResponse
if err := d.client.Call("GraphDriver.DiffSize", args, &ret); err != nil {
if err := d.p.Client().Call("GraphDriver.DiffSize", args, &ret); err != nil {
return -1, err
}
if ret.Err != "" {

18
integration-cli/docker_cli_daemon_plugins_test.go
View file

@ -235,6 +235,24 @@ func (s *DockerDaemonSuite) TestVolumePlugin(c *check.C) {
c.Assert(exists, checker.Equals, true)
}
func (s *DockerDaemonSuite) TestGraphdriverPlugin(c *check.C) {
testRequires(c, Network, IsAmd64, DaemonIsLinux, overlaySupported)
s.d.Start(c)
// install the plugin
plugin := "cpuguy83/docker-overlay2-graphdriver-plugin"
out, err := s.d.Cmd("plugin", "install", "--grant-all-permissions", plugin)
c.Assert(err, checker.IsNil, check.Commentf(out))
// restart the daemon with the plugin set as the storage driver
s.d.Restart(c, "-s", plugin)
// run a container
out, err = s.d.Cmd("run", "--rm", "busybox", "true") // this will pull busybox using the plugin
c.Assert(err, checker.IsNil, check.Commentf(out))
}
func existsMountpointWithPrefix(mountpointPrefix string) (bool, error) {
mounts, err := mount.GetMounts()
if err != nil {

13
integration-cli/requirements_unix.go
View file

@ -3,7 +3,9 @@
package main
import (
"bytes"
"io/ioutil"
"os/exec"
"strings"
"github.com/docker/docker/pkg/sysinfo"
@ -122,6 +124,17 @@ var (
},
"Test cannot be run without a kernel (4.3+) supporting ambient capabilities",
}
overlaySupported = testRequirement{
func() bool {
cmd := exec.Command(dockerBinary, "run", "--rm", "busybox", "/bin/sh", "-c", "cat /proc/filesystems")
out, err := cmd.CombinedOutput()
if err != nil {
return false
}
return bytes.Contains(out, []byte("overlay\n"))
},
"Test cannot be run wihtout suppport for ovelayfs",
}
)
func init() {

2
plugin/manager.go
View file

@ -156,7 +156,7 @@ func (pm *Manager) reload() error {
// We should only enable rootfs propagation for certain plugin types that need it.
for _, typ := range p.PluginObj.Config.Interface.Types {
if typ.Capability == "volumedriver" && typ.Prefix == "docker" && strings.HasPrefix(typ.Version, "1.") {
if (typ.Capability == "volumedriver" || typ.Capability == "graphdriver") && typ.Prefix == "docker" && strings.HasPrefix(typ.Version, "1.") {
if p.PluginObj.Config.PropagatedMount != "" {
// TODO: sanitize PropagatedMount and prevent breakout
p.PropagatedMount = filepath.Join(p.Rootfs, p.PluginObj.Config.PropagatedMount)