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LCOW: WORKDIR correct handling 

Signed-off-by: John Howard <jhoward@microsoft.com>
This commit is contained in:
John Howard 2017-08-04 11:39:23 -07:00
parent 8bee1e9a3b
commit 9fa449064c
10 changed files with 97 additions and 39 deletions
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2
builder/dockerfile/dispatchers.go
View File

@ -387,7 +387,7 @@ func workdir(req dispatchRequest) error {
runConfig := req.state.runConfig
// This is from the Dockerfile and will not necessarily be in platform
// specific semantics, hence ensure it is converted.
runConfig.WorkingDir, err = normaliseWorkdir(runConfig.WorkingDir, req.args[0])
runConfig.WorkingDir, err = normaliseWorkdir(req.builder.platform, runConfig.WorkingDir, req.args[0])
if err != nil {
return err
}

2
builder/dockerfile/dispatchers_unix.go
View File

@ -11,7 +11,7 @@ import (
// normaliseWorkdir normalises a user requested working directory in a
// platform semantically consistent way.
func normaliseWorkdir(current string, requested string) (string, error) {
func normaliseWorkdir(_ string, current string, requested string) (string, error) {
if requested == "" {
return "", errors.New("cannot normalise nothing")
}

3
builder/dockerfile/dispatchers_unix_test.go
View File

@ -3,6 +3,7 @@
package dockerfile
import (
"runtime"
"testing"
)
@ -16,7 +17,7 @@ func TestNormaliseWorkdir(t *testing.T) {
}
for _, test := range testCases {
normalised, err := normaliseWorkdir(test.current, test.requested)
normalised, err := normaliseWorkdir(runtime.GOOS, test.current, test.requested)
if test.expectedError != "" && err == nil {
t.Fatalf("NormaliseWorkdir should return an error %s, got nil", test.expectedError)

29
builder/dockerfile/dispatchers_windows.go
View File

@ -4,6 +4,7 @@ import (
"errors"
"fmt"
"os"
"path"
"path/filepath"
"regexp"
"strings"
@ -15,7 +16,33 @@ var pattern = regexp.MustCompile(`^[a-zA-Z]:\.$`)
// normaliseWorkdir normalises a user requested working directory in a
// platform semantically consistent way.
func normaliseWorkdir(current string, requested string) (string, error) {
func normaliseWorkdir(platform string, current string, requested string) (string, error) {
if platform == "" {
platform = "windows"
}
if platform == "windows" {
return normaliseWorkdirWindows(current, requested)
}
return normaliseWorkdirUnix(current, requested)
}
// normaliseWorkdirUnix normalises a user requested working directory in a
// platform semantically consistent way.
func normaliseWorkdirUnix(current string, requested string) (string, error) {
if requested == "" {
return "", errors.New("cannot normalise nothing")
}
current = strings.Replace(current, string(os.PathSeparator), "/", -1)
requested = strings.Replace(requested, string(os.PathSeparator), "/", -1)
if !path.IsAbs(requested) {
return path.Join(`/`, current, requested), nil
}
return requested, nil
}
// normaliseWorkdirWindows normalises a user requested working directory in a
// platform semantically consistent way.
func normaliseWorkdirWindows(current string, requested string) (string, error) {
if requested == "" {
return "", errors.New("cannot normalise nothing")
}

40
builder/dockerfile/dispatchers_windows_test.go
View File

@ -5,25 +5,31 @@ package dockerfile
import "testing"
func TestNormaliseWorkdir(t *testing.T) {
tests := []struct{ current, requested, expected, etext string }{
{``, ``, ``, `cannot normalise nothing`},
{``, `C:`, ``, `C:. is not a directory. If you are specifying a drive letter, please add a trailing '\'`},
{``, `C:.`, ``, `C:. is not a directory. If you are specifying a drive letter, please add a trailing '\'`},
{`c:`, `\a`, ``, `c:. is not a directory. If you are specifying a drive letter, please add a trailing '\'`},
{`c:.`, `\a`, ``, `c:. is not a directory. If you are specifying a drive letter, please add a trailing '\'`},
{``, `a`, `C:\a`, ``},
{``, `c:\foo`, `C:\foo`, ``},
{``, `c:\\foo`, `C:\foo`, ``},
{``, `\foo`, `C:\foo`, ``},
{``, `\\foo`, `C:\foo`, ``},
{``, `/foo`, `C:\foo`, ``},
{``, `C:/foo`, `C:\foo`, ``},
{`C:\foo`, `bar`, `C:\foo\bar`, ``},
{`C:\foo`, `/bar`, `C:\bar`, ``},
{`C:\foo`, `\bar`, `C:\bar`, ``},
tests := []struct{ platform, current, requested, expected, etext string }{
{"windows", ``, ``, ``, `cannot normalise nothing`},
{"windows", ``, `C:`, ``, `C:. is not a directory. If you are specifying a drive letter, please add a trailing '\'`},
{"windows", ``, `C:.`, ``, `C:. is not a directory. If you are specifying a drive letter, please add a trailing '\'`},
{"windows", `c:`, `\a`, ``, `c:. is not a directory. If you are specifying a drive letter, please add a trailing '\'`},
{"windows", `c:.`, `\a`, ``, `c:. is not a directory. If you are specifying a drive letter, please add a trailing '\'`},
{"windows", ``, `a`, `C:\a`, ``},
{"windows", ``, `c:\foo`, `C:\foo`, ``},
{"windows", ``, `c:\\foo`, `C:\foo`, ``},
{"windows", ``, `\foo`, `C:\foo`, ``},
{"windows", ``, `\\foo`, `C:\foo`, ``},
{"windows", ``, `/foo`, `C:\foo`, ``},
{"windows", ``, `C:/foo`, `C:\foo`, ``},
{"windows", `C:\foo`, `bar`, `C:\foo\bar`, ``},
{"windows", `C:\foo`, `/bar`, `C:\bar`, ``},
{"windows", `C:\foo`, `\bar`, `C:\bar`, ``},
{"linux", ``, ``, ``, `cannot normalise nothing`},
{"linux", ``, `foo`, `/foo`, ``},
{"linux", ``, `/foo`, `/foo`, ``},
{"linux", `/foo`, `bar`, `/foo/bar`, ``},
{"linux", `/foo`, `/bar`, `/bar`, ``},
{"linux", `\a`, `b\c`, `/a/b/c`, ``},
}
for _, i := range tests {
r, e := normaliseWorkdir(i.current, i.requested)
r, e := normaliseWorkdir(i.platform, i.current, i.requested)
if i.etext != "" && e == nil {
t.Fatalf("TestNormaliseWorkingDir Expected error %s for '%s' '%s', got no error", i.etext, i.current, i.requested)

7
container/container.go
View File

@ -261,12 +261,17 @@ func (container *Container) WriteHostConfig() (*containertypes.HostConfig, error
// SetupWorkingDirectory sets up the container's working directory as set in container.Config.WorkingDir
func (container *Container) SetupWorkingDirectory(rootIDs idtools.IDPair) error {
// TODO @jhowardmsft, @gupta-ak LCOW Support. This will need revisiting.
// We will need to do remote filesystem operations here.
if container.Platform != runtime.GOOS {
return nil
}
if container.Config.WorkingDir == "" {
return nil
}
container.Config.WorkingDir = filepath.Clean(container.Config.WorkingDir)
pth, err := container.GetResourcePath(container.Config.WorkingDir)
if err != nil {
return err

22
daemon/container.go
View File

@ -3,7 +3,10 @@ package daemon
import (
"fmt"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"time"
containertypes "github.com/docker/docker/api/types/container"
@ -226,13 +229,24 @@ func (daemon *Daemon) setHostConfig(container *container.Container, hostConfig *
// verifyContainerSettings performs validation of the hostconfig and config
// structures.
func (daemon *Daemon) verifyContainerSettings(hostConfig *containertypes.HostConfig, config *containertypes.Config, update bool) ([]string, error) {
func (daemon *Daemon) verifyContainerSettings(platform string, hostConfig *containertypes.HostConfig, config *containertypes.Config, update bool) ([]string, error) {
// First perform verification of settings common across all platforms.
if config != nil {
if config.WorkingDir != "" {
config.WorkingDir = filepath.FromSlash(config.WorkingDir) // Ensure in platform semantics
if !system.IsAbs(config.WorkingDir) {
wdInvalid := false
if runtime.GOOS == platform {
config.WorkingDir = filepath.FromSlash(config.WorkingDir) // Ensure in platform semantics
if !system.IsAbs(config.WorkingDir) {
wdInvalid = true
}
} else {
// LCOW. Force Unix semantics
config.WorkingDir = strings.Replace(config.WorkingDir, string(os.PathSeparator), "/", -1)
if !path.IsAbs(config.WorkingDir) {
wdInvalid = true
}
}
if wdInvalid {
return nil, fmt.Errorf("the working directory '%s' is invalid, it needs to be an absolute path", config.WorkingDir)
}
}

22
daemon/create.go
View File

@ -39,7 +39,17 @@ func (daemon *Daemon) containerCreate(params types.ContainerCreateConfig, manage
return containertypes.ContainerCreateCreatedBody{}, validationError{errors.New("Config cannot be empty in order to create a container")}
}
warnings, err := daemon.verifyContainerSettings(params.HostConfig, params.Config, false)
// TODO: @jhowardmsft LCOW support - at a later point, can remove the hard-coding
// to force the platform to be linux.
// Default the platform if not supplied
if params.Platform == "" {
params.Platform = runtime.GOOS
}
if system.LCOWSupported() {
params.Platform = "linux"
}
warnings, err := daemon.verifyContainerSettings(params.Platform, params.HostConfig, params.Config, false)
if err != nil {
return containertypes.ContainerCreateCreatedBody{Warnings: warnings}, validationError{err}
}
@ -75,16 +85,6 @@ func (daemon *Daemon) create(params types.ContainerCreateConfig, managed bool) (
err error
)
// TODO: @jhowardmsft LCOW support - at a later point, can remove the hard-coding
// to force the platform to be linux.
// Default the platform if not supplied
if params.Platform == "" {
params.Platform = runtime.GOOS
}
if system.LCOWSupported() {
params.Platform = "linux"
}
if params.Config.Image != "" {
img, err = daemon.GetImage(params.Config.Image)
if err != nil {

2
daemon/start.go
View File

@ -79,7 +79,7 @@ func (daemon *Daemon) ContainerStart(name string, hostConfig *containertypes.Hos
// check if hostConfig is in line with the current system settings.
// It may happen cgroups are umounted or the like.
if _, err = daemon.verifyContainerSettings(container.HostConfig, nil, false); err != nil {
if _, err = daemon.verifyContainerSettings(container.Platform, container.HostConfig, nil, false); err != nil {
return validationError{err}
}
// Adapt for old containers in case we have updates in this function and

7
daemon/update.go
View File

@ -11,7 +11,12 @@ import (
func (daemon *Daemon) ContainerUpdate(name string, hostConfig *container.HostConfig) (container.ContainerUpdateOKBody, error) {
var warnings []string
warnings, err := daemon.verifyContainerSettings(hostConfig, nil, true)
c, err := daemon.GetContainer(name)
if err != nil {
return container.ContainerUpdateOKBody{Warnings: warnings}, err
}
warnings, err = daemon.verifyContainerSettings(c.Platform, hostConfig, nil, true)
if err != nil {
return container.ContainerUpdateOKBody{Warnings: warnings}, validationError{err}
}