Does Docker work in the same way as Solaris/Illumos zones, or FreeBSD Jails (or Verio's equivalent [1])? Docker appears to add portability, but no security.<p>I ask as virtualising this way (thinking about secure shared hosting) is of interest to me, vs multiple VMs, and I'm curious about the advantages and disadvantages of each.<p>[1] <a href="http://support.verio.com/files/pdf/FreeBSD_VPS_v3_Technical_Overview-ED3.pdf" rel="nofollow">http://support.verio.com/files/pdf/FreeBSD_VPS_v3_Technical_...</a>