func execInContainer(client *docker.Client,
id string,
command []string) (string, string, error) {
exec, err := client.CreateExec(docker.CreateExecOptions{
AttachStderr: true,
AttachStdin: false,
AttachStdout: true,
Tty: false,
Cmd: command,
Container: id,
})
if err != nil {
return "", "", err
}
var outputBytes []byte
outputWriter := bytes.NewBuffer(outputBytes)
var errorBytes []byte
errorWriter := bytes.NewBuffer(errorBytes)
err = client.StartExec(exec.ID, docker.StartExecOptions{
OutputStream: outputWriter,
ErrorStream: errorWriter,
})
return outputWriter.String(), errorWriter.String(), err
}