BOSH is a project that unifies release engineering, deployment, and lifecycle management of small and large-scale cloud software. BOSH can provision and deploy software over hundreds of VMs. It also performs monitoring, failure recovery, and software updates with zero-to-minimal downtime.
While BOSH was developed to deploy Cloud Foundry PaaS, it can also be used to deploy almost any other software (Hadoop, for instance). BOSH is particularly well-suited for large distributed systems. In addition, BOSH supports multiple Infrastructure as a Service (IaaS) providers like VMware vSphere, Google Cloud Platform, Amazon Web Services EC2, Microsoft Azure, OpenStack, and Alibaba Cloud. There is a Cloud Provider Interface (CPI) that enables users to extend BOSH to support additional IaaS providers such as Apache CloudStack and VirtualBox.
bosh CLI is the command line tool used for interacting with all things BOSH. Release binaries are available on GitHub. See Installation for more details on how to download and install.