// LoadAndGetImageRegistryAuth loads the set of client auth objects from a docker config file
// and returns the appropriate client auth object for a given image name.
func LoadAndGetImageRegistryAuth(dockerCfg io.Reader, imageName string) client.AuthConfiguration {
auths, err := client.NewAuthConfigurations(dockerCfg)
if err != nil {
glog.V(0).Infof("error: Unable to load docker config")
return client.AuthConfiguration{}
}
return GetImageRegistryAuth(auths, imageName)
}
// LoadImageRegistryAuth loads and returns the set of client auth objects from a docker config
// json file.
func LoadImageRegistryAuth(dockerCfg io.Reader) *client.AuthConfigurations {
auths, err := client.NewAuthConfigurations(dockerCfg)
if err != nil {
glog.V(0).Infof("error: Unable to load docker config")
return nil
}
return auths
}
// setupPullSecret provides a Docker authentication configuration when the
// PullSecret is specified.
func (d *DockerBuilder) setupPullSecret() (*docker.AuthConfigurations, error) {
if len(os.Getenv(dockercfg.PullAuthType)) == 0 {
return nil, nil
}
r, err := os.Open(os.Getenv(dockercfg.PullAuthType))
if err != nil {
return nil, fmt.Errorf("'%s': %s", os.Getenv(dockercfg.PullAuthType), err)
}
return docker.NewAuthConfigurations(r)
}
// setupPullSecret provides a Docker authentication configuration when the
// PullSecret is specified.
func (d *DockerBuilder) setupPullSecret() (*docker.AuthConfigurations, error) {
if len(os.Getenv("PULL_DOCKERCFG_PATH")) == 0 {
return nil, nil
}
r, err := os.Open(os.Getenv("PULL_DOCKERCFG_PATH"))
if err != nil {
return nil, fmt.Errorf("'%s': %s", os.Getenv("PULL_DOCKERCFG_PATH"), err)
}
return docker.NewAuthConfigurations(r)
}
// DockerPush is the cli action for 'godo docker-push'
func DockerPush(c *cli.Context) {
dockerClient := dockutil.ClientOrDie()
cfg := config.ReadOrDie(c.String(FlagConfigFile))
if cfg.Docker.ImageName == "" {
log.Err("Docker image name was empty")
os.Exit(1)
}
pio := docker.PushImageOptions{
Name: cfg.Docker.ImageName,
Tag: cfg.Docker.GetTag(),
OutputStream: os.Stdout,
}
authFileLoc := cfg.Docker.Push.GetAuthFileLocation()
authFile, err := os.Open(authFileLoc)
if err != nil {
log.Err("Reading Docker auth file %s [%s]", authFileLoc, err)
os.Exit(1)
}
defer func() {
if err := authFile.Close(); err != nil {
log.Err("Closing Docker auth file %s [%s]", authFileLoc, err)
}
}()
auths, err := docker.NewAuthConfigurations(authFile)
if err != nil {
log.Err("Parsing auth file %s [%s]", authFileLoc, err)
os.Exit(1)
}
registry := "https://index.docker.io/v1/"
spl := strings.Split(pio.Name, "/")
if len(spl) == 3 {
registry = spl[0]
}
auth, ok := auths.Configs[registry]
if !ok {
log.Err("Registry %s in your image %s is not in auth file %s ", registry, pio.Name, authFileLoc)
os.Exit(1)
}
if err := dockerClient.PushImage(pio, auth); err != nil {
log.Err("Pushing Docker image %s [%s]", pio.Name, err)
os.Exit(1)
}
log.Info("Successfully pushed Docker image %s:%s", pio.Name, pio.Tag)
}
// pullImage creates an image by pulling it from a docker registry
func (d *DockerDriver) pullImage(driverConfig *DockerDriverConfig, client *docker.Client, repo string, tag string) error {
pullOptions := docker.PullImageOptions{
Repository: repo,
Tag: tag,
}
authOptions := docker.AuthConfiguration{}
if len(driverConfig.Auth) != 0 {
authOptions = docker.AuthConfiguration{
Username: driverConfig.Auth[0].Username,
Password: driverConfig.Auth[0].Password,
Email: driverConfig.Auth[0].Email,
ServerAddress: driverConfig.Auth[0].ServerAddress,
}
}
if authConfigFile := d.config.Read("docker.auth.config"); authConfigFile != "" {
if f, err := os.Open(authConfigFile); err == nil {
defer f.Close()
var authConfigurations *docker.AuthConfigurations
if authConfigurations, err = docker.NewAuthConfigurations(f); err != nil {
return fmt.Errorf("Failed to create docker auth object: %v", err)
}
authConfigurationKey := ""
if driverConfig.SSL {
authConfigurationKey += "https://"
}
authConfigurationKey += strings.Split(driverConfig.ImageName, "/")[0]
if authConfiguration, ok := authConfigurations.Configs[authConfigurationKey]; ok {
authOptions = authConfiguration
} else {
d.logger.Printf("[INFO] Failed to find docker auth with key %s", authConfigurationKey)
}
} else {
return fmt.Errorf("Failed to open auth config file: %v, error: %v", authConfigFile, err)
}
}
err := client.PullImage(pullOptions, authOptions)
if err != nil {
d.logger.Printf("[ERR] driver.docker: failed pulling container %s:%s: %s", repo, tag, err)
return d.recoverablePullError(err, driverConfig.ImageName)
}
d.logger.Printf("[DEBUG] driver.docker: docker pull %s:%s succeeded", repo, tag)
return nil
}
// setupPullSecret provides a Docker authentication configuration when the
// PullSecret is specified.
func (d *DockerBuilder) setupPullSecret() (*docker.AuthConfigurations, error) {
if len(os.Getenv(dockercfg.PullAuthType)) == 0 {
return nil, nil
}
glog.V(0).Infof("Checking for Docker config file for %s in path %s", dockercfg.PullAuthType, os.Getenv(dockercfg.PullAuthType))
dockercfgPath := dockercfg.GetDockercfgFile(os.Getenv(dockercfg.PullAuthType))
if len(dockercfgPath) == 0 {
return nil, fmt.Errorf("no docker config file found in '%s'", os.Getenv(dockercfg.PullAuthType))
}
glog.V(0).Infof("Using Docker config file %s", dockercfgPath)
r, err := os.Open(dockercfgPath)
if err != nil {
return nil, fmt.Errorf("'%s': %s", dockercfgPath, err)
}
return docker.NewAuthConfigurations(r)
}
func GetImageRegistryAuth(dockerCfg io.Reader, imageName string) client.AuthConfiguration {
spec, err := ParseDockerImageReference(imageName)
if err != nil {
return client.AuthConfiguration{}
}
if auths, err := client.NewAuthConfigurations(dockerCfg); err == nil {
if auth, ok := auths.Configs[spec.Registry]; ok {
glog.V(5).Infof("Using %s[%s] credentials for pulling %s", auth.Email, spec.Registry, imageName)
return auth
}
if auth, ok := auths.Configs[defaultRegistry]; ok {
glog.V(5).Infof("Using %s credentials for pulling %s", auth.Email, imageName)
return auth
}
}
return client.AuthConfiguration{}
}
func appendDockerCfgConfigs(dockercfg string, cfgs *docker.AuthConfigurations) error {
var imagePullAuths *docker.AuthConfigurations
reader, err := os.Open(dockercfg)
if err != nil {
return fmt.Errorf("Unable to open docker config file: %v\n", err)
}
defer reader.Close()
if imagePullAuths, err = docker.NewAuthConfigurations(reader); err != nil {
return fmt.Errorf("Unable to parse docker config file: %v\n", err)
}
if len(imagePullAuths.Configs) == 0 {
return fmt.Errorf("No auths were found in the given dockercfg file\n")
}
for name, ac := range imagePullAuths.Configs {
cfgs.Configs[fmt.Sprintf("%s/%s", dockercfg, name)] = ac
}
return nil
}
func (d *DockerDriver) Start(ctx *ExecContext, task *structs.Task) (DriverHandle, error) {
var driverConfig DockerDriverConfig
if err := mapstructure.WeakDecode(task.Config, &driverConfig); err != nil {
return nil, err
}
image := driverConfig.ImageName
if err := driverConfig.Validate(); err != nil {
return nil, err
}
if task.Resources == nil {
return nil, fmt.Errorf("Resources are not specified")
}
if task.Resources.MemoryMB == 0 {
return nil, fmt.Errorf("Memory limit cannot be zero")
}
if task.Resources.CPU == 0 {
return nil, fmt.Errorf("CPU limit cannot be zero")
}
cleanupContainer := d.config.ReadBoolDefault("docker.cleanup.container", true)
cleanupImage := d.config.ReadBoolDefault("docker.cleanup.image", true)
// Initialize docker API client
client, err := d.dockerClient()
if err != nil {
return nil, fmt.Errorf("Failed to connect to docker daemon: %s", err)
}
repo, tag := docker.ParseRepositoryTag(image)
// Make sure tag is always explicitly set. We'll default to "latest" if it
// isn't, which is the expected behavior.
if tag == "" {
tag = "latest"
}
var dockerImage *docker.Image
// We're going to check whether the image is already downloaded. If the tag
// is "latest" we have to check for a new version every time so we don't
// bother to check and cache the id here. We'll download first, then cache.
if tag != "latest" {
dockerImage, err = client.InspectImage(image)
}
// Download the image
if dockerImage == nil {
pullOptions := docker.PullImageOptions{
Repository: repo,
Tag: tag,
}
authOptions := docker.AuthConfiguration{}
if len(driverConfig.Auth) != 0 {
authOptions = docker.AuthConfiguration{
Username: driverConfig.Auth[0].Username,
Password: driverConfig.Auth[0].Password,
Email: driverConfig.Auth[0].Email,
ServerAddress: driverConfig.Auth[0].ServerAddress,
}
}
if authConfig := d.config.Read("docker.auth.config"); authConfig != "" {
if f, err := os.Open(authConfig); err == nil {
defer f.Close()
if authConfigurations, err := docker.NewAuthConfigurations(f); err == nil {
if authConfiguration, ok := authConfigurations.Configs[repo]; ok {
authOptions = authConfiguration
}
}
}
}
err = client.PullImage(pullOptions, authOptions)
if err != nil {
d.logger.Printf("[ERR] driver.docker: failed pulling container %s:%s: %s", repo, tag, err)
return nil, fmt.Errorf("Failed to pull `%s`: %s", image, err)
}
d.logger.Printf("[DEBUG] driver.docker: docker pull %s:%s succeeded", repo, tag)
// Now that we have the image we can get the image id
dockerImage, err = client.InspectImage(image)
if err != nil {
d.logger.Printf("[ERR] driver.docker: failed getting image id for %s: %s", image, err)
return nil, fmt.Errorf("Failed to determine image id for `%s`: %s", image, err)
}
}
taskDir, ok := ctx.AllocDir.TaskDirs[d.DriverContext.taskName]
if !ok {
return nil, fmt.Errorf("Could not find task directory for task: %v", d.DriverContext.taskName)
}
d.logger.Printf("[DEBUG] driver.docker: identified image %s as %s", image, dockerImage.ID)
bin, err := discover.NomadExecutable()
if err != nil {
return nil, fmt.Errorf("unable to find the nomad binary: %v", err)
}
pluginLogFile := filepath.Join(taskDir, fmt.Sprintf("%s-syslog-collector.out", task.Name))
pluginConfig := &plugin.ClientConfig{
Cmd: exec.Command(bin, "syslog", pluginLogFile),
}
logCollector, pluginClient, err := createLogCollector(pluginConfig, d.config.LogOutput, d.config)
if err != nil {
return nil, err
}
logCollectorCtx := &logcollector.LogCollectorContext{
TaskName: task.Name,
AllocDir: ctx.AllocDir,
LogConfig: task.LogConfig,
PortLowerBound: d.config.ClientMinPort,
PortUpperBound: d.config.ClientMaxPort,
}
ss, err := logCollector.LaunchCollector(logCollectorCtx)
if err != nil {
return nil, fmt.Errorf("failed to start syslog collector: %v", err)
}
config, err := d.createContainer(ctx, task, &driverConfig, ss.Addr)
if err != nil {
d.logger.Printf("[ERR] driver.docker: failed to create container configuration for image %s: %s", image, err)
pluginClient.Kill()
return nil, fmt.Errorf("Failed to create container configuration for image %s: %s", image, err)
}
// Create a container
container, err := client.CreateContainer(config)
if err != nil {
// If the container already exists because of a previous failure we'll
// try to purge it and re-create it.
if strings.Contains(err.Error(), "container already exists") {
// Get the ID of the existing container so we can delete it
containers, err := client.ListContainers(docker.ListContainersOptions{
// The image might be in use by a stopped container, so check everything
All: true,
Filters: map[string][]string{
"name": []string{config.Name},
},
})
if err != nil {
d.logger.Printf("[ERR] driver.docker: failed to query list of containers matching name:%s", config.Name)
pluginClient.Kill()
return nil, fmt.Errorf("Failed to query list of containers: %s", err)
}
// Couldn't find any matching containers
if len(containers) == 0 {
d.logger.Printf("[ERR] driver.docker: failed to get id for container %s: %#v", config.Name, containers)
pluginClient.Kill()
return nil, fmt.Errorf("Failed to get id for container %s", config.Name)
}
// Delete matching containers
d.logger.Printf("[INFO] driver.docker: a container with the name %s already exists; will attempt to purge and re-create", config.Name)
for _, container := range containers {
err = client.RemoveContainer(docker.RemoveContainerOptions{
ID: container.ID,
})
if err != nil {
d.logger.Printf("[ERR] driver.docker: failed to purge container %s", container.ID)
pluginClient.Kill()
return nil, fmt.Errorf("Failed to purge container %s: %s", container.ID, err)
}
d.logger.Printf("[INFO] driver.docker: purged container %s", container.ID)
}
container, err = client.CreateContainer(config)
if err != nil {
d.logger.Printf("[ERR] driver.docker: failed to re-create container %s; aborting", config.Name)
pluginClient.Kill()
return nil, fmt.Errorf("Failed to re-create container %s; aborting", config.Name)
}
} else {
// We failed to create the container for some other reason.
d.logger.Printf("[ERR] driver.docker: failed to create container from image %s: %s", image, err)
pluginClient.Kill()
return nil, fmt.Errorf("Failed to create container from image %s: %s", image, err)
}
}
d.logger.Printf("[INFO] driver.docker: created container %s", container.ID)
// Start the container
err = client.StartContainer(container.ID, container.HostConfig)
if err != nil {
d.logger.Printf("[ERR] driver.docker: failed to start container %s: %s", container.ID, err)
pluginClient.Kill()
return nil, fmt.Errorf("Failed to start container %s: %s", container.ID, err)
}
d.logger.Printf("[INFO] driver.docker: started container %s", container.ID)
// Return a driver handle
h := &DockerHandle{
client: client,
logCollector: logCollector,
pluginClient: pluginClient,
cleanupContainer: cleanupContainer,
cleanupImage: cleanupImage,
logger: d.logger,
imageID: dockerImage.ID,
containerID: container.ID,
killTimeout: d.DriverContext.KillTimeout(task),
doneCh: make(chan struct{}),
waitCh: make(chan *cstructs.WaitResult, 1),
}
go h.run()
return h, nil
}