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environment.go
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environment.go
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package environment // import "github.com/docker/docker/internal/test/environment"
import (
"fmt"
"os"
"path/filepath"
"strings"
"github.com/docker/docker/api/types"
"github.com/docker/docker/client"
"github.com/docker/docker/integration-cli/fixtures/load"
"github.com/pkg/errors"
"golang.org/x/net/context"
)
// Execution contains information about the current test execution and daemon
// under test
type Execution struct {
client client.APIClient
DaemonInfo types.Info
OSType string
PlatformDefaults PlatformDefaults
protectedElements protectedElements
}
// PlatformDefaults are defaults values for the platform of the daemon under test
type PlatformDefaults struct {
BaseImage string
VolumesConfigPath string
ContainerStoragePath string
}
// New creates a new Execution struct
func New() (*Execution, error) {
client, err := client.NewClientWithOpts(client.FromEnv)
if err != nil {
return nil, errors.Wrapf(err, "failed to create client")
}
info, err := client.Info(context.Background())
if err != nil {
return nil, errors.Wrapf(err, "failed to get info from daemon")
}
osType := getOSType(info)
return &Execution{
client: client,
DaemonInfo: info,
OSType: osType,
PlatformDefaults: getPlatformDefaults(info, osType),
protectedElements: newProtectedElements(),
}, nil
}
func getOSType(info types.Info) string {
// Docker EE does not set the OSType so allow the user to override this value.
userOsType := os.Getenv("TEST_OSTYPE")
if userOsType != "" {
return userOsType
}
return info.OSType
}
func getPlatformDefaults(info types.Info, osType string) PlatformDefaults {
volumesPath := filepath.Join(info.DockerRootDir, "volumes")
containersPath := filepath.Join(info.DockerRootDir, "containers")
switch osType {
case "linux":
return PlatformDefaults{
BaseImage: "scratch",
VolumesConfigPath: toSlash(volumesPath),
ContainerStoragePath: toSlash(containersPath),
}
case "windows":
baseImage := "microsoft/windowsservercore"
if override := os.Getenv("WINDOWS_BASE_IMAGE"); override != "" {
baseImage = override
fmt.Println("INFO: Windows Base image is ", baseImage)
}
return PlatformDefaults{
BaseImage: baseImage,
VolumesConfigPath: filepath.FromSlash(volumesPath),
ContainerStoragePath: filepath.FromSlash(containersPath),
}
default:
panic(fmt.Sprintf("unknown OSType for daemon: %s", osType))
}
}
// Make sure in context of daemon, not the local platform. Note we can't
// use filepath.FromSlash or ToSlash here as they are a no-op on Unix.
func toSlash(path string) string {
return strings.Replace(path, `\`, `/`, -1)
}
// IsLocalDaemon is true if the daemon under test is on the same
// host as the test process.
//
// Deterministically working out the environment in which CI is running
// to evaluate whether the daemon is local or remote is not possible through
// a build tag.
//
// For example Windows to Linux CI under Jenkins tests the 64-bit
// Windows binary build with the daemon build tag, but calls a remote
// Linux daemon.
//
// We can't just say if Windows then assume the daemon is local as at
// some point, we will be testing the Windows CLI against a Windows daemon.
//
// Similarly, it will be perfectly valid to also run CLI tests from
// a Linux CLI (built with the daemon tag) against a Windows daemon.
func (e *Execution) IsLocalDaemon() bool {
return os.Getenv("DOCKER_REMOTE_DAEMON") == ""
}
// IsRemoteDaemon is true if the daemon under test is on different host
// as the test process.
func (e *Execution) IsRemoteDaemon() bool {
return !e.IsLocalDaemon()
}
// DaemonAPIVersion returns the negociated daemon api version
func (e *Execution) DaemonAPIVersion() string {
version, err := e.APIClient().ServerVersion(context.TODO())
if err != nil {
return ""
}
return version.APIVersion
}
// Print the execution details to stdout
// TODO: print everything
func (e *Execution) Print() {
if e.IsLocalDaemon() {
fmt.Println("INFO: Testing against a local daemon")
} else {
fmt.Println("INFO: Testing against a remote daemon")
}
}
// APIClient returns an APIClient connected to the daemon under test
func (e *Execution) APIClient() client.APIClient {
return e.client
}
// EnsureFrozenImagesLinux loads frozen test images into the daemon
// if they aren't already loaded
func EnsureFrozenImagesLinux(testEnv *Execution) error {
if testEnv.OSType == "linux" {
err := load.FrozenImagesLinux(testEnv.APIClient(), frozenImages...)
if err != nil {
return errors.Wrap(err, "error loading frozen images")
}
}
return nil
}