zduymz · October 24, 2016 18:25
diff --git a/docker vs vagrant b/docker vs vagrant
 Docker, previously called dotCloud and open-sourced in 2013, is a Linux-only virtual environment (VE) tool, not a VM tool. It builds on LxC (LinuX Containers), which uses the cgroups functionality to enable creation and running of multiple isolated Linux virtual environments (VE) on a single control host. So unlike a VM, a VE like Docker doesn’t create its own virtual computer with a distinct OS and processors and hardware emulation. A VE is VM-lite; it rides on the already existing kernel’s image of the underlying hardware, and only creates a ‘container’ in which to run your apps, and even recreate the OS if you want since the OS is also just another app running on the kernel. It places only a little extra load on the system, so unlike the traditional VM there is very little overhead when using Docker. Because of the shared kernel, Docker’s isolation is not as good as a full VM’s, but it suits many people just fine.

 Vagrant, an open-source product released in 2010, is best described as a VM manager. It allows you to script and package the VM config and the provisioning setup. It is designed to run on top of almost any VM tool – VirtualBox, VMWare, AWS, etc. However, default support is only included for VirtualBox, for the other providers you must first install their plugins (http://docs.vagrantup.com/v2/providers/ ). However, Vagrant is still a virtual machine, albeit one with more powerful features than the bog-standard VM tools out there; for instance you can integrate Vagrant with CM tools such as Puppet and Chef to provision your own VM setups and configs.
	Docker, previously called dotCloud and open-sourced in 2013, is a Linux-only virtual environment (VE) tool, not a VM tool. It builds on LxC (LinuX Containers), which uses the cgroups functionality to enable creation and running of multiple isolated Linux virtual environments (VE) on a single control host. So unlike a VM, a VE like Docker doesn’t create its own virtual computer with a distinct OS and processors and hardware emulation. A VE is VM-lite; it rides on the already existing kernel’s image of the underlying hardware, and only creates a ‘container’ in which to run your apps, and even recreate the OS if you want since the OS is also just another app running on the kernel. It places only a little extra load on the system, so unlike the traditional VM there is very little overhead when using Docker. Because of the shared kernel, Docker’s isolation is not as good as a full VM’s, but it suits many people just fine.

	Vagrant, an open-source product released in 2010, is best described as a VM manager. It allows you to script and package the VM config and the provisioning setup. It is designed to run on top of almost any VM tool – VirtualBox, VMWare, AWS, etc. However, default support is only included for VirtualBox, for the other providers you must first install their plugins (http://docs.vagrantup.com/v2/providers/ ). However, Vagrant is still a virtual machine, albeit one with more powerful features than the bog-standard VM tools out there; for instance you can integrate Vagrant with CM tools such as Puppet and Chef to provision your own VM setups and configs.