package main
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"net"
"net/http"
"net/http/httptest"
"net/http/httputil"
"net/url"
"os"
"os/exec"
"path"
"path/filepath"
"strconv"
"strings"
"testing"
"time"
"github.com/docker/docker/api"
)
// Daemon represents a Docker daemon for the testing framework.
type Daemon struct {
t *testing.T
logFile *os.File
folder string
stdin io.WriteCloser
stdout, stderr io.ReadCloser
cmd *exec.Cmd
storageDriver string
execDriver string
wait chan error
}
// NewDaemon returns a Daemon instance to be used for testing.
// This will create a directory such as daemon123456789 in the folder specified by $DEST.
// The daemon will not automatically start.
func NewDaemon(t *testing.T) *Daemon {
dest := os.Getenv("DEST")
if dest == "" {
t.Fatal("Please set the DEST environment variable")
}
dir := filepath.Join(dest, fmt.Sprintf("daemon%d", time.Now().UnixNano()%100000000))
daemonFolder, err := filepath.Abs(dir)
if err != nil {
t.Fatalf("Could not make %q an absolute path: %v", dir, err)
}
if err := os.MkdirAll(filepath.Join(daemonFolder, "graph"), 0600); err != nil {
t.Fatalf("Could not create %s/graph directory", daemonFolder)
}
return &Daemon{
t: t,
folder: daemonFolder,
storageDriver: os.Getenv("DOCKER_GRAPHDRIVER"),
execDriver: os.Getenv("DOCKER_EXECDRIVER"),
}
}
// Start will start the daemon and return once it is ready to receive requests.
// You can specify additional daemon flags.
func (d *Daemon) Start(arg ...string) error {
dockerBinary, err := exec.LookPath(dockerBinary)
if err != nil {
d.t.Fatalf("could not find docker binary in $PATH: %v", err)
}
args := []string{
"--host", d.sock(),
"--daemon",
"--graph", fmt.Sprintf("%s/graph", d.folder),
"--pidfile", fmt.Sprintf("%s/docker.pid", d.folder),
}
// If we don't explicitly set the log-level or debug flag(-D) then
// turn on debug mode
foundIt := false
for _, a := range arg {
if strings.Contains(a, "--log-level") || strings.Contains(a, "-D") {
foundIt = true
}
}
if !foundIt {
args = append(args, "--debug")
}
if d.storageDriver != "" {
args = append(args, "--storage-driver", d.storageDriver)
}
if d.execDriver != "" {
args = append(args, "--exec-driver", d.execDriver)
}
args = append(args, arg...)
d.cmd = exec.Command(dockerBinary, args...)
d.logFile, err = os.OpenFile(filepath.Join(d.folder, "docker.log"), os.O_RDWR|os.O_CREATE|os.O_APPEND, 0600)
if err != nil {
d.t.Fatalf("Could not create %s/docker.log: %v", d.folder, err)
}
d.cmd.Stdout = d.logFile
d.cmd.Stderr = d.logFile
if err := d.cmd.Start(); err != nil {
return fmt.Errorf("could not start daemon container: %v", err)
}
wait := make(chan error)
go func() {
wait <- d.cmd.Wait()
d.t.Log("exiting daemon")
close(wait)
}()
d.wait = wait
tick := time.Tick(500 * time.Millisecond)
// make sure daemon is ready to receive requests
startTime := time.Now().Unix()
for {
d.t.Log("waiting for daemon to start")
if time.Now().Unix()-startTime > 5 {
// After 5 seconds, give up
return errors.New("Daemon exited and never started")
}
select {
case <-time.After(2 * time.Second):
return errors.New("timeout: daemon does not respond")
case <-tick:
c, err := net.Dial("unix", filepath.Join(d.folder, "docker.sock"))
if err != nil {
continue
}
client := httputil.NewClientConn(c, nil)
defer client.Close()
req, err := http.NewRequest("GET", "/_ping", nil)
if err != nil {
d.t.Fatalf("could not create new request: %v", err)
}
resp, err := client.Do(req)
if err != nil {
continue
}
if resp.StatusCode != http.StatusOK {
d.t.Logf("received status != 200 OK: %s", resp.Status)
}
d.t.Log("daemon started")
return nil
}
}
}
// StartWithBusybox will first start the daemon with Daemon.Start()
// then save the busybox image from the main daemon and load it into this Daemon instance.
func (d *Daemon) StartWithBusybox(arg ...string) error {
if err := d.Start(arg...); err != nil {
return err
}
bb := filepath.Join(d.folder, "busybox.tar")
if _, err := os.Stat(bb); err != nil {
if !os.IsNotExist(err) {
return fmt.Errorf("unexpected error on busybox.tar stat: %v", err)
}
// saving busybox image from main daemon
if err := exec.Command(dockerBinary, "save", "--output", bb, "busybox:latest").Run(); err != nil {
return fmt.Errorf("could not save busybox image: %v", err)
}
}
// loading busybox image to this daemon
if _, err := d.Cmd("load", "--input", bb); err != nil {
return fmt.Errorf("could not load busybox image: %v", err)
}
if err := os.Remove(bb); err != nil {
d.t.Logf("Could not remove %s: %v", bb, err)
}
return nil
}
// Stop will send a SIGINT every second and wait for the daemon to stop.
// If it timeouts, a SIGKILL is sent.
// Stop will not delete the daemon directory. If a purged daemon is needed,
// instantiate a new one with NewDaemon.
func (d *Daemon) Stop() error {
if d.cmd == nil || d.wait == nil {
return errors.New("daemon not started")
}
defer func() {
d.logFile.Close()
d.cmd = nil
}()
i := 1
tick := time.Tick(time.Second)
if err := d.cmd.Process.Signal(os.Interrupt); err != nil {
return fmt.Errorf("could not send signal: %v", err)
}
out1:
for {
select {
case err := <-d.wait:
return err
case <-time.After(15 * time.Second):
// time for stopping jobs and run onShutdown hooks
d.t.Log("timeout")
break out1
}
}
out2:
for {
select {
case err := <-d.wait:
return err
case <-tick:
i++
if i > 4 {
d.t.Logf("tried to interrupt daemon for %d times, now try to kill it", i)
break out2
}
d.t.Logf("Attempt #%d: daemon is still running with pid %d", i, d.cmd.Process.Pid)
if err := d.cmd.Process.Signal(os.Interrupt); err != nil {
return fmt.Errorf("could not send signal: %v", err)
}
}
}
if err := d.cmd.Process.Kill(); err != nil {
d.t.Logf("Could not kill daemon: %v", err)
return err
}
return nil
}
// Restart will restart the daemon by first stopping it and then starting it.
func (d *Daemon) Restart(arg ...string) error {
d.Stop()
return d.Start(arg...)
}
func (d *Daemon) sock() string {
return fmt.Sprintf("unix://%s/docker.sock", d.folder)
}
// Cmd will execute a docker CLI command against this Daemon.
// Example: d.Cmd("version") will run docker -H unix://path/to/unix.sock version
func (d *Daemon) Cmd(name string, arg ...string) (string, error) {
args := []string{"--host", d.sock(), name}
args = append(args, arg...)
c := exec.Command(dockerBinary, args...)
b, err := c.CombinedOutput()
return string(b), err
}
func (d *Daemon) LogfileName() string {
return d.logFile.Name()
}
func daemonHost() string {
daemonUrlStr := "unix://" + api.DEFAULTUNIXSOCKET
if daemonHostVar := os.Getenv("DOCKER_HOST"); daemonHostVar != "" {
daemonUrlStr = daemonHostVar
}
return daemonUrlStr
}
func sockConn(timeout time.Duration) (net.Conn, error) {
daemon := daemonHost()
daemonUrl, err := url.Parse(daemon)
if err != nil {
return nil, fmt.Errorf("could not parse url %q: %v", daemon, err)
}
var c net.Conn
switch daemonUrl.Scheme {
case "unix":
return net.DialTimeout(daemonUrl.Scheme, daemonUrl.Path, timeout)
case "tcp":
return net.DialTimeout(daemonUrl.Scheme, daemonUrl.Host, timeout)
default:
return c, fmt.Errorf("unknown scheme %v (%s)", daemonUrl.Scheme, daemon)
}
}
func sockRequest(method, endpoint string, data interface{}) ([]byte, error) {
jsonData := bytes.NewBuffer(nil)
if err := json.NewEncoder(jsonData).Encode(data); err != nil {
return nil, err
}
return sockRequestRaw(method, endpoint, jsonData, "application/json")
}
func sockRequestRaw(method, endpoint string, data io.Reader, ct string) ([]byte, error) {
c, err := sockConn(time.Duration(10 * time.Second))
if err != nil {
return nil, fmt.Errorf("could not dial docker daemon: %v", err)
}
client := httputil.NewClientConn(c, nil)
defer client.Close()
req, err := http.NewRequest(method, endpoint, data)
if err != nil {
return nil, fmt.Errorf("could not create new request: %v", err)
}
if ct == "" {
ct = "application/json"
}
req.Header.Set("Content-Type", ct)
resp, err := client.Do(req)
if err != nil {
return nil, fmt.Errorf("could not perform request: %v", err)
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
body, _ := ioutil.ReadAll(resp.Body)
return body, fmt.Errorf("received status != 200 OK: %s", resp.Status)
}
return ioutil.ReadAll(resp.Body)
}
func deleteContainer(container string) error {
container = strings.Replace(container, "\n", " ", -1)
container = strings.Trim(container, " ")
killArgs := fmt.Sprintf("kill %v", container)
killSplitArgs := strings.Split(killArgs, " ")
killCmd := exec.Command(dockerBinary, killSplitArgs...)
runCommand(killCmd)
rmArgs := fmt.Sprintf("rm -v %v", container)
rmSplitArgs := strings.Split(rmArgs, " ")
rmCmd := exec.Command(dockerBinary, rmSplitArgs...)
exitCode, err := runCommand(rmCmd)
// set error manually if not set
if exitCode != 0 && err == nil {
err = fmt.Errorf("failed to remove container: `docker rm` exit is non-zero")
}
return err
}
func getAllContainers() (string, error) {
getContainersCmd := exec.Command(dockerBinary, "ps", "-q", "-a")
out, exitCode, err := runCommandWithOutput(getContainersCmd)
if exitCode != 0 && err == nil {
err = fmt.Errorf("failed to get a list of containers: %v\n", out)
}
return out, err
}
func deleteAllContainers() error {
containers, err := getAllContainers()
if err != nil {
fmt.Println(containers)
return err
}
if err = deleteContainer(containers); err != nil {
return err
}
return nil
}
func getPausedContainers() (string, error) {
getPausedContainersCmd := exec.Command(dockerBinary, "ps", "-f", "status=paused", "-q", "-a")
out, exitCode, err := runCommandWithOutput(getPausedContainersCmd)
if exitCode != 0 && err == nil {
err = fmt.Errorf("failed to get a list of paused containers: %v\n", out)
}
return out, err
}
func getSliceOfPausedContainers() ([]string, error) {
out, err := getPausedContainers()
if err == nil {
slice := strings.Split(strings.TrimSpace(out), "\n")
return slice, err
} else {
return []string{out}, err
}
}
func unpauseContainer(container string) error {
unpauseCmd := exec.Command(dockerBinary, "unpause", container)
exitCode, err := runCommand(unpauseCmd)
if exitCode != 0 && err == nil {
err = fmt.Errorf("failed to unpause container")
}
return nil
}
func unpauseAllContainers() error {
containers, err := getPausedContainers()
if err != nil {
fmt.Println(containers)
return err
}
containers = strings.Replace(containers, "\n", " ", -1)
containers = strings.Trim(containers, " ")
containerList := strings.Split(containers, " ")
for _, value := range containerList {
if err = unpauseContainer(value); err != nil {
return err
}
}
return nil
}
func deleteImages(images ...string) error {
args := make([]string, 1, 2)
args[0] = "rmi"
args = append(args, images...)
rmiCmd := exec.Command(dockerBinary, args...)
exitCode, err := runCommand(rmiCmd)
// set error manually if not set
if exitCode != 0 && err == nil {
err = fmt.Errorf("failed to remove image: `docker rmi` exit is non-zero")
}
return err
}
func imageExists(image string) error {
inspectCmd := exec.Command(dockerBinary, "inspect", image)
exitCode, err := runCommand(inspectCmd)
if exitCode != 0 && err == nil {
err = fmt.Errorf("couldn't find image %q", image)
}
return err
}
func pullImageIfNotExist(image string) (err error) {
if err := imageExists(image); err != nil {
pullCmd := exec.Command(dockerBinary, "pull", image)
_, exitCode, err := runCommandWithOutput(pullCmd)
if err != nil || exitCode != 0 {
err = fmt.Errorf("image %q wasn't found locally and it couldn't be pulled: %s", image, err)
}
}
return
}
func dockerCmd(t *testing.T, args ...string) (string, int, error) {
out, status, err := runCommandWithOutput(exec.Command(dockerBinary, args...))
if err != nil {
t.Fatalf("%q failed with errors: %s, %v", strings.Join(args, " "), out, err)
}
return out, status, err
}
// execute a docker command with a timeout
func dockerCmdWithTimeout(timeout time.Duration, args ...string) (string, int, error) {
out, status, err := runCommandWithOutputAndTimeout(exec.Command(dockerBinary, args...), timeout)
if err != nil {
return out, status, fmt.Errorf("%q failed with errors: %v : %q)", strings.Join(args, " "), err, out)
}
return out, status, err
}
// execute a docker command in a directory
func dockerCmdInDir(t *testing.T, path string, args ...string) (string, int, error) {
dockerCommand := exec.Command(dockerBinary, args...)
dockerCommand.Dir = path
out, status, err := runCommandWithOutput(dockerCommand)
if err != nil {
return out, status, fmt.Errorf("%q failed with errors: %v : %q)", strings.Join(args, " "), err, out)
}
return out, status, err
}
// execute a docker command in a directory with a timeout
func dockerCmdInDirWithTimeout(timeout time.Duration, path string, args ...string) (string, int, error) {
dockerCommand := exec.Command(dockerBinary, args...)
dockerCommand.Dir = path
out, status, err := runCommandWithOutputAndTimeout(dockerCommand, timeout)
if err != nil {
return out, status, fmt.Errorf("%q failed with errors: %v : %q)", strings.Join(args, " "), err, out)
}
return out, status, err
}
func findContainerIP(t *testing.T, id string) string {
cmd := exec.Command(dockerBinary, "inspect", "--format='{{ .NetworkSettings.IPAddress }}'", id)
out, _, err := runCommandWithOutput(cmd)
if err != nil {
t.Fatal(err, out)
}
return strings.Trim(out, " \r\n'")
}
func getContainerCount() (int, error) {
const containers = "Containers:"
cmd := exec.Command(dockerBinary, "info")
out, _, err := runCommandWithOutput(cmd)
if err != nil {
return 0, err
}
lines := strings.Split(out, "\n")
for _, line := range lines {
if strings.Contains(line, containers) {
output := stripTrailingCharacters(line)
output = strings.TrimLeft(output, containers)
output = strings.Trim(output, " ")
containerCount, err := strconv.Atoi(output)
if err != nil {
return 0, err
}
return containerCount, nil
}
}
return 0, fmt.Errorf("couldn't find the Container count in the output")
}
type FakeContext struct {
Dir string
}
func (f *FakeContext) Add(file, content string) error {
filepath := path.Join(f.Dir, file)
dirpath := path.Dir(filepath)
if dirpath != "." {
if err := os.MkdirAll(dirpath, 0755); err != nil {
return err
}
}
return ioutil.WriteFile(filepath, []byte(content), 0644)
}
func (f *FakeContext) Delete(file string) error {
filepath := path.Join(f.Dir, file)
return os.RemoveAll(filepath)
}
func (f *FakeContext) Close() error {
return os.RemoveAll(f.Dir)
}
func fakeContextFromDir(dir string) *FakeContext {
return &FakeContext{dir}
}
func fakeContextWithFiles(files map[string]string) (*FakeContext, error) {
tmp, err := ioutil.TempDir("", "fake-context")
if err != nil {
return nil, err
}
if err := os.Chmod(tmp, 0755); err != nil {
return nil, err
}
ctx := fakeContextFromDir(tmp)
for file, content := range files {
if err := ctx.Add(file, content); err != nil {
ctx.Close()
return nil, err
}
}
return ctx, nil
}
func fakeContextAddDockerfile(ctx *FakeContext, dockerfile string) error {
if err := ctx.Add("Dockerfile", dockerfile); err != nil {
ctx.Close()
return err
}
return nil
}
func fakeContext(dockerfile string, files map[string]string) (*FakeContext, error) {
ctx, err := fakeContextWithFiles(files)
if err != nil {
ctx.Close()
return nil, err
}
if err := fakeContextAddDockerfile(ctx, dockerfile); err != nil {
return nil, err
}
return ctx, nil
}
// FakeStorage is a static file server. It might be running locally or remotely
// on test host.
type FakeStorage interface {
Close() error
URL() string
CtxDir() string
}
// fakeStorage returns either a local or remote (at daemon machine) file server
func fakeStorage(files map[string]string) (FakeStorage, error) {
ctx, err := fakeContextWithFiles(files)
if err != nil {
return nil, err
}
return fakeStorageWithContext(ctx)
}
// fakeStorageWithContext returns either a local or remote (at daemon machine) file server
func fakeStorageWithContext(ctx *FakeContext) (FakeStorage, error) {
if isLocalDaemon {
return newLocalFakeStorage(ctx)
}
return newRemoteFileServer(ctx)
}
// localFileStorage is a file storage on the running machine
type localFileStorage struct {
*FakeContext
*httptest.Server
}
func (s *localFileStorage) URL() string {
return s.Server.URL
}
func (s *localFileStorage) CtxDir() string {
return s.FakeContext.Dir
}
func (s *localFileStorage) Close() error {
defer s.Server.Close()
return s.FakeContext.Close()
}
func newLocalFakeStorage(ctx *FakeContext) (*localFileStorage, error) {
handler := http.FileServer(http.Dir(ctx.Dir))
server := httptest.NewServer(handler)
return &localFileStorage{
FakeContext: ctx,
Server: server,
}, nil
}
// remoteFileServer is a containerized static file server started on the remote
// testing machine to be used in URL-accepting docker build functionality.
type remoteFileServer struct {
host string // hostname/port web server is listening to on docker host e.g. 0.0.0.0:43712
container string
image string
ctx *FakeContext
}
func (f *remoteFileServer) URL() string {
u := url.URL{
Scheme: "http",
Host: f.host}
return u.String()
}
func (f *remoteFileServer) CtxDir() string {
return f.ctx.Dir
}
func (f *remoteFileServer) Close() error {
defer func() {
if f.ctx != nil {
f.ctx.Close()
}
if f.image != "" {
deleteImages(f.image)
}
}()
if f.container == "" {
return nil
}
return deleteContainer(f.container)
}
func newRemoteFileServer(ctx *FakeContext) (*remoteFileServer, error) {
var (
image = fmt.Sprintf("fileserver-img-%s", strings.ToLower(makeRandomString(10)))
container = fmt.Sprintf("fileserver-cnt-%s", strings.ToLower(makeRandomString(10)))
)
// Build the image
if err := fakeContextAddDockerfile(ctx, `FROM httpserver
COPY . /static`); err != nil {
return nil, fmt.Errorf("Cannot add Dockerfile to context: %v", err)
}
if _, err := buildImageFromContext(image, ctx, false); err != nil {
return nil, fmt.Errorf("failed building file storage container image: %v", err)
}
// Start the container
runCmd := exec.Command(dockerBinary, "run", "-d", "-P", "--name", container, image)
if out, ec, err := runCommandWithOutput(runCmd); err != nil {
return nil, fmt.Errorf("failed to start file storage container. ec=%v\nout=%s\nerr=%v", ec, out, err)
}
// Find out the system assigned port
out, _, err := runCommandWithOutput(exec.Command(dockerBinary, "port", container, "80/tcp"))
if err != nil {
return nil, fmt.Errorf("failed to find container port: err=%v\nout=%s", err, out)
}
return &remoteFileServer{
container: container,
image: image,
host: strings.Trim(out, "\n"),
ctx: ctx}, nil
}
func inspectFieldAndMarshall(name, field string, output interface{}) error {
str, err := inspectFieldJSON(name, field)
if err != nil {
return err
}
return json.Unmarshal([]byte(str), output)
}
func inspectFilter(name, filter string) (string, error) {
format := fmt.Sprintf("{{%s}}", filter)
inspectCmd := exec.Command(dockerBinary, "inspect", "-f", format, name)
out, exitCode, err := runCommandWithOutput(inspectCmd)
if err != nil || exitCode != 0 {
return "", fmt.Errorf("failed to inspect container %s: %s", name, out)
}
return strings.TrimSpace(out), nil
}
func inspectField(name, field string) (string, error) {
return inspectFilter(name, fmt.Sprintf(".%s", field))
}
func inspectFieldJSON(name, field string) (string, error) {
return inspectFilter(name, fmt.Sprintf("json .%s", field))
}
func inspectFieldMap(name, path, field string) (string, error) {
return inspectFilter(name, fmt.Sprintf("index .%s %q", path, field))
}
func getIDByName(name string) (string, error) {
return inspectField(name, "Id")
}
// getContainerState returns the exit code of the container
// and true if it's running
// the exit code should be ignored if it's running
func getContainerState(t *testing.T, id string) (int, bool, error) {
var (
exitStatus int
running bool
)
out, exitCode, err := dockerCmd(t, "inspect", "--format={{.State.Running}} {{.State.ExitCode}}", id)
if err != nil || exitCode != 0 {
return 0, false, fmt.Errorf("%q doesn't exist: %s", id, err)
}
out = strings.Trim(out, "\n")
splitOutput := strings.Split(out, " ")
if len(splitOutput) != 2 {
return 0, false, fmt.Errorf("failed to get container state: output is broken")
}
if splitOutput[0] == "true" {
running = true
}
if n, err := strconv.Atoi(splitOutput[1]); err == nil {
exitStatus = n
} else {
return 0, false, fmt.Errorf("failed to get container state: couldn't parse integer")
}
return exitStatus, running, nil
}
func buildImageWithOut(name, dockerfile string, useCache bool) (string, string, error) {
args := []string{"build", "-t", name}
if !useCache {
args = append(args, "--no-cache")
}
args = append(args, "-")
buildCmd := exec.Command(dockerBinary, args...)
buildCmd.Stdin = strings.NewReader(dockerfile)
out, exitCode, err := runCommandWithOutput(buildCmd)
if err != nil || exitCode != 0 {
return "", out, fmt.Errorf("failed to build the image: %s", out)
}
id, err := getIDByName(name)
if err != nil {
return "", out, err
}
return id, out, nil
}
func buildImageWithStdoutStderr(name, dockerfile string, useCache bool) (string, string, string, error) {
args := []string{"build", "-t", name}
if !useCache {
args = append(args, "--no-cache")
}
args = append(args, "-")
buildCmd := exec.Command(dockerBinary, args...)
buildCmd.Stdin = strings.NewReader(dockerfile)
stdout, stderr, exitCode, err := runCommandWithStdoutStderr(buildCmd)
if err != nil || exitCode != 0 {
return "", stdout, stderr, fmt.Errorf("failed to build the image: %s", stdout)
}
id, err := getIDByName(name)
if err != nil {
return "", stdout, stderr, err
}
return id, stdout, stderr, nil
}
func buildImage(name, dockerfile string, useCache bool) (string, error) {
id, _, err := buildImageWithOut(name, dockerfile, useCache)
return id, err
}
func buildImageFromContext(name string, ctx *FakeContext, useCache bool) (string, error) {
args := []string{"build", "-t", name}
if !useCache {
args = append(args, "--no-cache")
}
args = append(args, ".")
buildCmd := exec.Command(dockerBinary, args...)
buildCmd.Dir = ctx.Dir
out, exitCode, err := runCommandWithOutput(buildCmd)
if err != nil || exitCode != 0 {
return "", fmt.Errorf("failed to build the image: %s", out)
}
return getIDByName(name)
}
func buildImageFromPath(name, path string, useCache bool) (string, error) {
args := []string{"build", "-t", name}
if !useCache {
args = append(args, "--no-cache")
}
args = append(args, path)
buildCmd := exec.Command(dockerBinary, args...)
out, exitCode, err := runCommandWithOutput(buildCmd)
if err != nil || exitCode != 0 {
return "", fmt.Errorf("failed to build the image: %s", out)
}
return getIDByName(name)
}
type GitServer interface {
URL() string
Close() error
}
type localGitServer struct {
*httptest.Server
}
func (r *localGitServer) Close() error {
r.Server.Close()
return nil
}
func (r *localGitServer) URL() string {
return r.Server.URL
}
type FakeGIT struct {
root string
server GitServer
RepoURL string
}
func (g *FakeGIT) Close() {
g.server.Close()
os.RemoveAll(g.root)
}
func fakeGIT(name string, files map[string]string, enforceLocalServer bool) (*FakeGIT, error) {
ctx, err := fakeContextWithFiles(files)
if err != nil {
return nil, err
}
defer ctx.Close()
curdir, err := os.Getwd()
if err != nil {
return nil, err
}
defer os.Chdir(curdir)
if output, err := exec.Command("git", "init", ctx.Dir).CombinedOutput(); err != nil {
return nil, fmt.Errorf("error trying to init repo: %s (%s)", err, output)
}
err = os.Chdir(ctx.Dir)
if err != nil {
return nil, err
}
if output, err := exec.Command("git", "config", "user.name", "Fake User").CombinedOutput(); err != nil {
return nil, fmt.Errorf("error trying to set 'user.name': %s (%s)", err, output)
}
if output, err := exec.Command("git", "config", "user.email", "fake.user@example.com").CombinedOutput(); err != nil {
return nil, fmt.Errorf("error trying to set 'user.email': %s (%s)", err, output)
}
if output, err := exec.Command("git", "add", "*").CombinedOutput(); err != nil {
return nil, fmt.Errorf("error trying to add files to repo: %s (%s)", err, output)
}
if output, err := exec.Command("git", "commit", "-a", "-m", "Initial commit").CombinedOutput(); err != nil {
return nil, fmt.Errorf("error trying to commit to repo: %s (%s)", err, output)
}
root, err := ioutil.TempDir("", "docker-test-git-repo")
if err != nil {
return nil, err
}
repoPath := filepath.Join(root, name+".git")
if output, err := exec.Command("git", "clone", "--bare", ctx.Dir, repoPath).CombinedOutput(); err != nil {
os.RemoveAll(root)
return nil, fmt.Errorf("error trying to clone --bare: %s (%s)", err, output)
}
err = os.Chdir(repoPath)
if err != nil {
os.RemoveAll(root)
return nil, err
}
if output, err := exec.Command("git", "update-server-info").CombinedOutput(); err != nil {
os.RemoveAll(root)
return nil, fmt.Errorf("error trying to git update-server-info: %s (%s)", err, output)
}
err = os.Chdir(curdir)
if err != nil {
os.RemoveAll(root)
return nil, err
}
var server GitServer
if !enforceLocalServer {
// use fakeStorage server, which might be local or remote (at test daemon)
server, err = fakeStorageWithContext(fakeContextFromDir(root))
if err != nil {
return nil, fmt.Errorf("cannot start fake storage: %v", err)
}
} else {
// always start a local http server on CLI test machin
httpServer := httptest.NewServer(http.FileServer(http.Dir(root)))
server = &localGitServer{httpServer}
}
return &FakeGIT{
root: root,
server: server,
RepoURL: fmt.Sprintf("%s/%s.git", server.URL(), name),
}, nil
}
// Write `content` to the file at path `dst`, creating it if necessary,
// as well as any missing directories.
// The file is truncated if it already exists.
// Call t.Fatal() at the first error.
func writeFile(dst, content string, t *testing.T) {
// Create subdirectories if necessary
if err := os.MkdirAll(path.Dir(dst), 0700); err != nil && !os.IsExist(err) {
t.Fatal(err)
}
f, err := os.OpenFile(dst, os.O_CREATE|os.O_RDWR|os.O_TRUNC, 0700)
if err != nil {
t.Fatal(err)
}
// Write content (truncate if it exists)
if _, err := io.Copy(f, strings.NewReader(content)); err != nil {
t.Fatal(err)
}
}
// Return the contents of file at path `src`.
// Call t.Fatal() at the first error (including if the file doesn't exist)
func readFile(src string, t *testing.T) (content string) {
data, err := ioutil.ReadFile(src)
if err != nil {
t.Fatal(err)
}
return string(data)
}
func containerStorageFile(containerId, basename string) string {
return filepath.Join("/var/lib/docker/containers", containerId, basename)
}
// docker commands that use this function must be run with the '-d' switch.
func runCommandAndReadContainerFile(filename string, cmd *exec.Cmd) ([]byte, error) {
out, _, err := runCommandWithOutput(cmd)
if err != nil {
return nil, fmt.Errorf("%v: %q", err, out)
}
time.Sleep(1 * time.Second)
contID := strings.TrimSpace(out)
return readContainerFile(contID, filename)
}
func readContainerFile(containerId, filename string) ([]byte, error) {
f, err := os.Open(containerStorageFile(containerId, filename))
if err != nil {
return nil, err
}
defer f.Close()
content, err := ioutil.ReadAll(f)
if err != nil {
return nil, err
}
return content, nil
}
func readContainerFileWithExec(containerId, filename string) ([]byte, error) {
out, _, err := runCommandWithOutput(exec.Command(dockerBinary, "exec", containerId, "cat", filename))
return []byte(out), err
}
// daemonTime provides the current time on the daemon host
func daemonTime(t *testing.T) time.Time {
if isLocalDaemon {
return time.Now()
}
body, err := sockRequest("GET", "/info", nil)
if err != nil {
t.Fatal("daemonTime: failed to get /info: %v", err)
}
type infoJSON struct {
SystemTime string
}
var info infoJSON
if err = json.Unmarshal(body, &info); err != nil {
t.Fatalf("unable to unmarshal /info response: %v", err)
}
dt, err := time.Parse(time.RFC3339Nano, info.SystemTime)
if err != nil {
t.Fatal(err)
}
return dt
}
func setupRegistry(t *testing.T) func() {
testRequires(t, RegistryHosting)
reg, err := newTestRegistryV2(t)
if err != nil {
t.Fatal(err)
}
// Wait for registry to be ready to serve requests.
for i := 0; i != 5; i++ {
if err = reg.Ping(); err == nil {
break
}
time.Sleep(100 * time.Millisecond)
}
if err != nil {
t.Fatal("Timeout waiting for test registry to become available")
}
return func() { reg.Close() }
}
// appendBaseEnv appends the minimum set of environment variables to exec the
// docker cli binary for testing with correct configuration to the given env
// list.
func appendBaseEnv(env []string) []string {
preserveList := []string{
// preserve remote test host
"DOCKER_HOST",
// windows: requires preserving SystemRoot, otherwise dial tcp fails
// with "GetAddrInfoW: A non-recoverable error occurred during a database lookup."
"SystemRoot",
}
for _, key := range preserveList {
if val := os.Getenv(key); val != "" {
env = append(env, fmt.Sprintf("%s=%s", key, val))
}
}
return env
}