Containers has changed the world

"BeBanjo get together". Internal presentation about containers and their potential.

Transcript

1. DEC 2015
2. CONTAINERS
3. CONTAINERS HAVE CHANGED THE WORLD
4. DO YOU REMEMBER THIS ARTICLE?1 1 http://blog.circleci.com/its-the-future/
5. BUT YOU PROBABLY DIDN'T READ THIS2 2 http://blog.circleci.com/it-really-is-the-future/
6. CONTAINERS PREHISTORY > Containers are not a new idea > Originated via filesystem containers with chroot in Unix 7 (1979)
7. CONTAINERS PREHISTORY > 2000, FreeBSD 4.0 Introduce the jail command > 2005, Sun Microsystems Released Solaris Zones
8. THE DARK AGES > Hardware-level virtualization Support the execution of a complete operating system > Virtual Machine Emulation of a particular computer system > Hypervisor
9. CONTAINERS > 2008 LXC (Linux Containers) Operating-system-level virtualization environment for running multiple isolated Linux systems contaniers on a single Linux host
10. LXC lightweight virtualization No hypervisor (as in OS virtualization like KVM, Xen)
12. LXC The Linux kernel provides control groups Resources limitation, prioritization, accounting, control namespace isolation pid, ipc, uts, user, mnt, net
13. VM VS LINUX CONTAINERS > Virtualization offers greater isolation at the cost of greater overhead > Containers offer less isolation but lower overhead through sharing the host kernel
15. CONTAINERS > 2013, dotCloud saw the power of Containers meanwhile they were building PaaS > Solomon Hykes started Docker as an internal project within dotCloud > Struggling as a PasS, dotCloud pivoted open sourced their container-based orchestration layer
16. ... AND DOCKER WAS BORN
17. BUT... WHAT IS DOCKER? > High-level API Building on top of facilities provided by the Linux kernel
18. BUT... WHAT IS DOCKER? > Union filesystem For distribute and manage containers images > Copy on Write - CoW > AUFS (advanced multi layered unification filesystem) 3 > OverlayFS 3 https://docs.docker.com/engine/userguide/storagedriver/aufs-driver/
19. BUT... WHAT IS DOCKER? Allows you to package an application with all of its dependencies into a standardized unit
20. BUT... WHAT IS DOCKER? > Command Line Tool Allows talk with the docker daemon API
21. DOCKER DEMO
22. AND MORE... Commands: attach Attach to a running container build Build an image from a Dockerfile commit Create a new image from a container's changes cp Copy files/folders between a container and the local filesystem create Create a new container diff Inspect changes on a container's filesystem events Get real time events from the server exec Run a command in a running container export Export a container's filesystem as a tar archive history Show the history of an image images List images import Import the contents from a tarball to create a filesystem image info Display system-wide information
23. inspect Return low-level information on a container or image kill Kill a running container load Load an image from a tar archive or STDIN login Register or log in to a Docker registry logout Log out from a Docker registry logs Fetch the logs of a container network Manage Docker networks pause Pause all processes within a container port List port mappings or a specific mapping for the CONTAINER ps List containers pull Pull an image or a repository from a registry push Push an image or a repository to a registry rename Rename a container restart Restart a container rm Remove one or more containers
24. rmi Remove one or more images run Run a command in a new container save Save an image(s) to a tar archive search Search the Docker Hub for images start Start one or more stopped containers stats Display a live stream of container(s) resource usage statistics stop Stop a running container tag Tag an image into a repository top Display the running processes of a container unpause Unpause all processes within a container version Show the Docker version information volume Manage Docker volumes wait Block until a container stops, then print its exit code Run 'docker COMMAND --help' for more information on a command.
25. QUICK RECAP > Image is the filesystem snapshot > Container is what we call an image when it is run > Containers share the host kernel > Containers can only run in Linux, but each container can contain a different linux distro
26. DOCKER IS MUCH MORE > Dockerfile > Docker Volumes, Networking > Docker Hub, Docker Registry > Docker Plugins > Docker Machine, Docker Swarm, Docker Compose
28. docker build -t nginx .
29. THE DOCKER PROMISE BUILD AN IMAGE AND RUN IT EVERYWHERE
30. PAUSE
31. DOCKER REVOLUTION While OS containers have been around for over a decade, Docker has brought the concept to a much broader audience
32. DOCKER REVOLUTION Docker is doing to apt what apt did to tar — Bryan Cantrill, CTO, Joyent
33. ATOMIC HOSTS > Traditional, a server is build carefully and maintain > Atomic Update > CoreOs, Project Atomic, Snappy Ubuntu > Immutable platform, designed with the sole purpose of running containerized applications
34. WHAT IF I WANT TO RUN 100 CONTAINERS
35. OR 1000 CONTAINERS
36. OR 10000000.....
37. IS WHAT GOOGLE HAS BEEN DOING THE LAST TEN YEARS 4 4 Google 2015, http://research.google.com/pubs/pub43438.html
38. OMEGA: FLEXIBLE, SCALABLE SCHEDULES FOR LARGE COMPUTER CLUSTERS 5 5 Google 2013, http://research.google.com/pubs/pub41684.html
40. KUBERNETES Kubernetes is a cluster manager software for deploying, running and managing Docker containers at scale > 100% Open source, written in go
41. KUBERNETES Greek for Helmsman Also the root of the word Governor and cybernetic
42. KUBERNETES > Container orchestrator > Runs and manages containers > Support multiple cloud and bare-metal environments > Inspired and informed by Google's experiences and internal systems Manage applications, not machines
43. DEMO
44. KUBERNETES > Portable > Extensible > Self-healing
45. CONTAINERS ARE A NEW WAY OF WORKING
46. REQUIRES NEW CONCEPTS AND NEW TOOLS
47. IT SOLVE A LOT OF PROBLEMS
48. BUT ALSO BRINGS NEW ONES
49. Thank You!