What do you mean with that Docker does not provide the kernel itself? I did not mean Docker and OpenVZ are similar technology, they are exactly the same technol

What do you mean with that Docker does not provide the kernel itself? I did not mean Docker and OpenVZ are similar technology, they are exactly the same technology, just different toolset. You can only run Docker on linux (boot2docker simply runs a Linux VM), you use the kernel of the host os.