BOSH

https://bosh.io/
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, vCloud Director, Amazon Web Services EC2, and OpenStack.
There is a Cloud Provider Interface (CPI) that enables users to extend BOSH to support additional IaaS providers such as Google Compute Engine and Apache CloudStack.

Stemcell

버전별 OS 이미지 특정 IaaS 패키지용
vSphere, AWS, OpenStack, vCloud 인프라스트럭처에 공통인 이미지
- vSphere 위에 Ubuntu Trusty와 CentOS 6.5
tarball로 배포 (*.tgz)

versioned collection of configuration properties, configuration templates, start up scripts, source code, binary artifacts, and anything else required to build and deploy software in a reproducible way.
the layer placed on top of a stemcell.
For example, a Redis release might include start-up and shutdown scripts for redis-server, a tarball with Redis source code obtained from the Redis official website, and a few configuration properties allowing cluster operators to alter that Redis configuration.

collection of VMs, built from a stemcell, that has been populated with specific releases and disks that keep persistent data.
These resources are created based on a manifest file in the IaaS and managed by the BOSH Director, a centralized management server.