Docker from basics to orchestration (PHPConfBr2015)

Docker From basics to orchestration

Credits

Special thanks to all the people who made and released these awesome resources for free:◎ Presentation template by SlidesCarnival◎ Photographs by Unsplash & Death to the Stock Photo

(license)◎ Dark wood background by The pattern library

http://www.slidescarnival.com/

http://unsplash.com/

http://deathtothestockphoto.com/

http://deathtothestockphoto.com/wp-content/uploads/DeathtotheStockPhoto-License.pdf

http://thepatternlibrary.com/

About Me

Overview

Overview

◎ Environment Issues◎ Virtualization◎ LXC◎ Docker

○ features○ demo

◎ Machine

◎ Orchestration○ tools○ demo

◎ Swarm○ demo

◎ Q&A

Environment Issues

Environment Issues

◎ substr vs mb_substr functions

Environment Issues

◎ substr vs mb_substr functions◎ short open tags: <?=

Environment Issues

◎ substr vs mb_substr functions◎ short open tags: <?=◎ syntax changes between versions: array(); e [];

Environment Issues

◎ substr vs mb_substr functions◎ short open tags: <?=◎ syntax changes between versions: array(); e [];◎ extensions that we forget to install in

production: php-memcached, redis, amqp, etc.

Environment Issues

◎ substr vs mb_substr functions◎ short open tags: <?=◎ syntax changes between versions: array(); e [];◎ extensions that we forget to install in

production: php-memcached, redis, amqp, etc.

◎ different upload file settings in different servers

Virtualization

◎ 1960 - inspired by cpu time sharing

Virtualization - History

◎ 1960 - inspired by cpu time sharing◎ IBM 370 - First instructions to support

software virtualization, CP/CMS allow running more than one instance simultaneously




◎ IBM z/VM - First success case, all hardware were virtualized





◎ until nineties only client/server applications





◎ until nineties only client/server applications◎ 2000+ - CPUs with virtualization support,

hypervisors: VMWare, Xen, KVM, VirtualBox, etc


Virtualization - Hypervisors

Virtualization - Stack

◎ Standard environment

Virtualization - Pros & Cons


◎ Improve resources utilization




◎ Easy data recovery





◎ If host fails all VMs crashes together







◎ Troubleshooting more difficult






◎ Troubleshooting more difficult

◎ Increase overhead

LXC - Linux Containers


◎ Exists since Jul/2008 - Kernel 2.6.26+


◎ Exists since Jul/2008 - Kernel 2.6.26+◎ Process isolation


◎ Exists since Jul/2008 - Kernel 2.6.26+◎ Process isolation ◎ Network isolation


◎ Exists since Jul/2008 - Kernel 2.6.26+◎ Process isolation ◎ Network isolation◎ Memory limitation


◎ Exists since Jul/2008 - Kernel 2.6.26+◎ Process isolation ◎ Network isolation◎ Memory limitation◎ File system isolation

LXC - Pros & Cons

◎ Good resources isolation

LXC - Pros & Cons


◎ Run as a process, a single PID is created

LXC - Pros & Cons



◎ Reuse host resources (libs, kernel)

LXC - Pros & Cons




◎ Starts much more faster than VMs

LXC - Pros & Cons

◎ Volume share are difficult to do





LXC - Pros & Cons


◎ Architecture failure may lead to chroot attack





LXC - Pros & Cons



◎ IO overhead





LXC - Pros & Cons



◎ IO overhead◎ Run on Linux hosts

only





DOCKER

Docker

Docker

Doki =>

◎ Portable

Docker - Features

◎ Portable◎ Versionable

Docker - Features

◎ Portable◎ Versionable◎ Reusable

Docker - Features

◎ Portable◎ Versionable◎ Reusable◎ Copy-on-write

Docker - Features

◎ Portable◎ Versionable◎ Reusable◎ Copy-on-write◎ Logging

Docker - Features

◎ Portable◎ Versionable◎ Reusable◎ Copy-on-write◎ Logging◎ Image change management

Docker - Features

◎ Portable◎ Versionable◎ Reusable◎ Copy-on-write◎ Logging◎ Image change management◎ Automatic build

Docker - Features

◎ Portable◎ Versionable◎ Reusable◎ Copy-on-write◎ Logging◎ Image change management◎ Automatic build◎ Easy to share

Docker - Features

Docker - Features

◎ Private and public registry

Docker - Features

◎ Private and public registry◎ Server-client architecture

Docker - Features

◎ Private and public registry◎ Server-client architecture◎ Client consume engine API

Docker - Features

◎ Private and public registry◎ Server-client architecture◎ Client consume engine API◎ Orchestration tools (compose, swarm,volume

networks)

Docker - Features

◎ Private and public registry◎ Server-client architecture◎ Client consume engine API◎ Orchestration tools (compose, swarm,volume

networks)◎ Always innovating

Docker - VM Comparison

Docker - Quick Tips

◎ It is a container not a VM

Docker - Quick Tips

◎ It is a container not a VM◎ Container images are like VM boxes

Docker - Quick Tips

◎ It is a container not a VM◎ Container images are like VM boxes◎ Images are state, container runs it

Docker - Install

◎ Follow instructions for your OS in http://docs.docker.com/installation

Docker - Install


◎ Several distros supported

Docker - Install


◎ Several distros supported◎ Mac OS X and Windows needs a VM to act

like a Docker host - Boot2docker

Docker - Install



like a Docker host - Boot2docker◎ There is roadmap to run Linux container on

FreeBSD host

Docker - Install



like a Docker host - Boot2docker◎ There is roadmap to run Linux container on

FreeBSD host◎ Windows containers running on Windows

hosts will be available on Windows Server 2016

Docker - Beggining

◎ run◎ pull◎ commit◎ push◎ exec◎ ps◎ images◎ inspect◎ rm◎ rmi

“

Talk is cheap, show me the code.Linus Torvalds

“

pull

commit

push

Docker - Images

Dockerfile

Docker - Improving

◎ Volume○ list, create, inspect

◎ Port expose and port mapping◎ Links between containers◎ Network

○ list, create,inspect, connect

Second Demo

Docker - Machine

◎ Creates virtual machines ready to run docker locally or on the cloud.

◎ drivers available:○ Amazon Web Services, Microsoft Azure, Digital

Ocean, Exoscale, Google Compute Engine,

Microsoft Hyper-V, OpenStack, Rackspace, IBM

Softlayer, Oracle VirtualBox, VMware vCloud Air,

VMware Fusion, VMware vSphere and Generic

Docker - Orchestration

◎ Docker Compose (Old FIG)


◎ Docker Compose (Old FIG) ○ Config file: docker-compose.yml○ Run: docker-compose up



◎ Crane - http://getcrane.com○ Config file: crane.json or crane.yaml○ Run: crane lift



◎ Crane - http://getcrane.com○ Config file: crane.json or crane.yaml○ Run: crane lift

◎ AZK - http://www.azk.io○ Config file: Azkfile.js○ Run: `azk agent start` and then `azk start`

Third Demo


◎ Docker Swarm○ Orchestrate docker hosts○ supports schedulers and node discovery services

Last Demo

Docker - Comming

◎ User namespaces

◎ Open Containers Initiative - by Linux Foundation:

https://www.opencontainers.org/

Voucher: php_conf2015

Q&A Slides

http://bit.ly/phpconfbr2015

Docker from basics to orchestration (PHPConfBr2015)

Technology

Transcript of Docker from basics to orchestration (PHPConfBr2015)