Capstan is a tool for rapidly building and running your application on OSv. Capstan is as simple and fast as using Docker for creating containers, but the result is a complete virtual machine image that will run on any hypervisor with OSv support.

• Run multiple VMs of an image as copy-on-write
• Linux, OS X, and Windows support
• Hypervisors:
  • QEMU/KVM
  • VirtualBox
• Cloud providers:
  • Google Compute Engine

You need a working Go environment installed. See Go install instructions for how to do that. Go version 1.1 or later is required.

You also need QEMU installed. On Fedora:

$ sudo yum install qemu-system-x86

On OS X:

$ brew install qemu

To install Capstan, type:

$ go get github.com/cloudius-systems/capstan

This installs a capstan executable to your Go workspace so make sure your PATH environment variable includes $GOPATH/bin.

To update capstan to the latest version execute the following commands:

$ cd $GOPATH/src/github.com/cloudius-systems/capstan
$ git pull
$ ./install

To run OSv on default hypervisor which is QEMU/KVM, type:

$ capstan run cloudius/osv

To run OSv on VirtualBox, type:

$ capstan run -p vbox cloudius/osv

To show a list of available remote images, type:

$ capstan search

To show a list of locally installed images, type:

$ capstan images

• Capstanfile

• Running native Linux apps on OSv
• Running Java on OSv
• Running Clojure on OSv

Capstan is distributed under the 3-clause BSD license.