Cloud infrastrukturen - Folienset 6 - Bosh

Bosh Basics

• Inner vs. outer shell

• Bosh = Bosh outer shell

What is Bosh?

„BOSH is an open source tool chain for release engineering, deployment, and lifecycle management of large-scale

distributed services.“

http://docs.cloudfoundry.org/bosh/understanding-bosh.html

IaaS - OpenStack

VIRTUAL DATACENTER

VIRTUAL MACHINE

MicroBosh

Router

STORAGE

Storage Node Storage Node Storage Node

HDD HDD

HDD HDD

HDD HDD

HDD HDD

HDD HDD

HDD HDD

HDD HDD

HDD HDD

HDD HDD

Bosh API

Storage Volume

Operating System

Bosh Agent

VIRTUAL MACHINE

Bosh CLI $> bosh deploy

IaaS API

Bosh Deployment

Stemcell Release Manifest

A Bosh-Deployment depends on 1 .. *

Stemcells

• VM template

• Bosh clones new VMs from stemcells

• Stemcell = OS + Bosh Agent

• Bosh Agent acts on the VM

• Stemcells are infrastructure and OS specific (VMware + Ubuntu, OpenStack + CentOS, etc.)

A Bosh-Deployment is described by a Release

• = collection of

• source code

• configuration files

• startup scripts

• software packages

• jobs

A Release contains 1 .. * Jobs

• Jobs = Processes to be run

• = set of configuration files

• + scripts

• > run process from a package, e.g. mysqld

A Release contains 1 .. * Package

• Package

• src code

• compile script

• install script

A Bosh Deployment’s settings are contained in a

Manifest

• defines the layout and properties of a deployment

• infrastructure configuration

• network architecture

• VM dimensions, used stemcells (OS)

• bosh cli pushed manifest to Bosh director

• > Bosh director creates a deployment

Bosh Deployment Workflow

• Upload stemcell

• Upload a release

• Set deployment with a manifest

• Execute deployment

Benefits from Bosh’s design

• Switch deployment between clouds

• Keep the same release

• Use a stemcell specific to the new cloud

• Adapt the manifest

• Scaling-out a Bosh deployed system

• Keep the same release

• Use the same stemcell

• Change the manifest

• Update or roll-back Bosh deployed system

• Use a newer or older release version

• Use the same stemcell

• Use the same manifest

Bosh Design Principles

BOSH Deployments are Predictable

• Src code is compiled in a freshly created VMs

• VMs always contain exact the software, specified in the release

• No left-overs of prior deployments as new VMs are used.

BOSH Deployments are Repeatable

Executing a specific Bosh deployment always leads to exact same deployed

system.

BOSH Deployments are Self-Healing

Bosh Health Monitor

• Bosh Health Monitor…

• monitors processes running on the VMs managed by Bosh

• Compares desired vs. actual state

• Bosh can recreated processes and VMS on failure.

PaaS Process Failure

Anynines Operations Manager (Bosh) Anynines IaaS (OpenStack)

CF Health Manager (Process)

Bosh Agent

VIR

TU

AL

MA

CH

INE

Process Monitor

CF DEA (Process)

VIR

TU

AL

MA

CH

INE

Bosh Agent Process Monitor

Bosh Health Monitor

Bosh Director

NATS Message Bus

Infrastructure Level Self-Healing

CF DEA (Process)

VIR

TU

AL

MA

CH

INE

Bosh Agent Process Monitor

CF DEA (Process)

Process Monitor

PaaS VM Failure

Anynines Operations Manager (Bosh) Anynines IaaS (OpenStack)

CF Health Manager (Process)

Bosh Agent

VIR

TU

AL

MA

CH

INE

Process Monitor

CF DEA (Process)

VIR

TU

AL

MA

CH

INE

Bosh Agent Process Monitor

CF DEA (Process)

VIR

TU

AL

MA

CH

INE

Bosh Agent Process Monitor

Bosh Health Monitor

Bosh Director

NATS Message Bus

CF DEA (Process)

VIR

TU

AL

MA

CH

INE

Bosh Agent Process Monitor

Infrastructure Level Self-Healing

Anynines Operations Manager (Bosh) Anynines IaaS (OpenStack)

CF Health Manager (Process)

Bosh Agent

VIR

TU

AL

MA

CH

INE

Process Monitor

CF DEA (Process)

VIR

TU

AL

MA

CH

INE

Bosh Agent Process Monitor

Bosh Health Monitor

Bosh Director

NATS Message Bus

Infrastructure Level Self-Healing

CF DEA (Process)

VIR

TU

AL

MA

CH

INE

Bosh Agent Process Monitor

CF DEA (Process)

VIR

TU

AL

MA

CH

INE

Bosh Agent Process MonitorBosh Agent

Thank you.

@fischerjulian j@avtq.de

Links & Sources

• Open Source Bosh Documentation http://docs.cloudfoundry.org/bosh/

• Understanding Bosh http://docs.cloudfoundry.org/bosh/understanding-bosh.html

• Bosh Source Code on github.comhttps://github.com/cloudfoundry/bosh