Ben Golub is the CEO of Docker, one of the hottest and buzziest cloud startups around. He joined VentureBeat to explain what Docker is, why it's suddenly so popular, and why open-source is such a lasting strategy for enterprise technology companies.

Plus: News about Microsoft's Windows 10, Silicon Valley legends Sam Altman and Dustin Moscovitz teach a startup class, and why we're not buying the iPhone 6.