// getDockerClient obtains a new Docker client from the environment or
// from a Docker machine, starting it if necessary and permitted
func getDockerClient(out io.Writer, dockerMachine string, canStartDockerMachine bool) (*docker.Client, *dockerclient.Client, error) {
if len(dockerMachine) > 0 {
glog.V(2).Infof("Getting client for Docker machine %q", dockerMachine)
dockerClient, engineAPIClient, err := getDockerMachineClient(dockerMachine, out, canStartDockerMachine)
if err != nil {
return nil, nil, errors.ErrNoDockerMachineClient(dockerMachine, err)
}
return dockerClient, engineAPIClient, nil
}
dockerTLSVerify := os.Getenv("DOCKER_TLS_VERIFY")
dockerCertPath := os.Getenv("DOCKER_CERT_PATH")
if len(dockerTLSVerify) > 0 && len(dockerCertPath) == 0 {
dockerCertPath = cliconfig.ConfigDir()
os.Setenv("DOCKER_CERT_PATH", dockerCertPath)
}
if glog.V(4) {
dockerHost := os.Getenv("DOCKER_HOST")
if len(dockerHost) == 0 && len(dockerTLSVerify) == 0 && len(dockerCertPath) == 0 {
glog.Infof("No Docker environment variables found. Will attempt default socket.")
}
if len(dockerHost) > 0 {
glog.Infof("Will try Docker connection with host (DOCKER_HOST) %q", dockerHost)
} else {
glog.Infof("No Docker host (DOCKER_HOST) configured. Will attempt default socket.")
}
if len(dockerTLSVerify) > 0 {
glog.Infof("DOCKER_TLS_VERIFY=%s", dockerTLSVerify)
}
if len(dockerCertPath) > 0 {
glog.Infof("DOCKER_CERT_PATH=%s", dockerCertPath)
}
}
dockerClient, _, err := dockerutil.NewHelper().GetClient()
if err != nil {
return nil, nil, errors.ErrNoDockerClient(err)
}
// FIXME: Workaround for docker engine API client on OS X - sets the default to
// the wrong DOCKER_HOST string
if runtime.GOOS == "darwin" {
dockerHost := os.Getenv("DOCKER_HOST")
if len(dockerHost) == 0 {
os.Setenv("DOCKER_HOST", "unix:///var/run/docker.sock")
}
}
engineAPIClient, err := dockerclient.NewEnvClient()
if err != nil {
return nil, nil, errors.ErrNoDockerClient(err)
}
if err = dockerClient.Ping(); err != nil {
return nil, nil, errors.ErrCannotPingDocker(err)
}
glog.V(4).Infof("Docker ping succeeded")
return dockerClient, engineAPIClient, nil
}
// GetDockerClient will obtain a new Docker client from the environment or
// from a Docker machine, starting it if necessary
func (c *ClientStartConfig) GetDockerClient(out io.Writer) error {
var err error
if len(c.DockerMachine) > 0 {
glog.V(2).Infof("Getting client for Docker machine %q", c.DockerMachine)
c.dockerClient, err = getDockerMachineClient(c.DockerMachine, out)
if err != nil {
return errors.ErrNoDockerMachineClient(c.DockerMachine, err)
}
return nil
}
if glog.V(4) {
dockerHost := os.Getenv("DOCKER_HOST")
dockerTLSVerify := os.Getenv("DOCKER_TLS_VERIFY")
dockerCertPath := os.Getenv("DOCKER_CERT_PATH")
if len(dockerHost) == 0 && len(dockerTLSVerify) == 0 && len(dockerCertPath) == 0 {
glog.Infof("No Docker environment variables found. Will attempt default socket.")
}
if len(dockerHost) > 0 {
glog.Infof("Will try Docker connection with host (DOCKER_HOST) %q", dockerHost)
} else {
glog.Infof("No Docker host (DOCKER_HOST) configured. Will attempt default socket.")
}
if len(dockerTLSVerify) > 0 {
glog.Infof("DOCKER_TLS_VERIFY=%s", dockerTLSVerify)
}
if len(dockerCertPath) > 0 {
glog.Infof("DOCKER_CERT_PATH=%s", dockerCertPath)
}
}
c.dockerClient, _, err = dockerutil.NewHelper().GetClient()
if err != nil {
return errors.ErrNoDockerClient(err)
}
if err = c.dockerClient.Ping(); err != nil {
return errors.ErrCannotPingDocker(err)
}
glog.V(4).Infof("Docker ping succeeded")
return nil
}