Brainstorm K Containerization with Docker. Crown Palm 2:30-3:30. Adam W Zheng Nebraska Educational Service Unit 10

Transcription

1 Brainstorm K Containerization with Docker Crown Palm 2:30-3:30 Adam W Zheng adam.zheng@esu10.org

2 Introduction - What is Containerization? - Why run services in containers? - What are the benefits over 'regular' Virtual Machines? Image Credit - Docker

3 Docker - Docker - Tool for OS-Level Virtualization (aka Containerization) - Becoming more & more Mainstream - Much more efficient & portable than traditional VM s - Adoption is at a remarkable rate

4 Operating-System-Level Virtualization - Containerization vs Traditional Virtual Machines Application 1 Application 2 Bins / Libs Bins / Libs Guest OS Guest OS Application 1 Application 2 Bins / Libs Bins / Libs Hypervisor (Hyper-V, KVM, etc) Host OS (RHEL, Windows Server, etc) Server / Infrastructure Virtual Machines Docker Engine Host OS (RHEL, Windows Server, etc) Server / Infrastructure Containers

5 Sliding Right Into It* - Install Docker - Open Terminal (or PowerShell), and run the following: Image Credit - Docker *Recommend you go visit the waterpark after the conference

6 Command Overview - So what did this do? Execute the Docker Binary Run a command in a Container Provide a Human Readable Container Name Map the Port from the Container to the Host <host>:<container> The docker image to use (In this case, Official Apache Image)

7 Result Overview - So what did this do? No image was found, so pull it. Note that run will not pull images with the same tag Use docker pull to pull updated images with same tag

8 Result Overview - So what did this do? Download all immutable layers of this image

9 Result Overview - So what did this do? Ex: This layer is downloading the Debian image

10 Result Overview - So what did this do? Ex: This layer contains results of running package updates

11 Accessing the Service - Visit your service with some browser,

12 Another Example - Another Example, run the following:

13 Accessing the Service - Visit your service with mysql workbench, localhost:3306

14 Where do These Come From? - Docker Machine Environment Variables - Dockerhub Where are the docs for these env vars? Where are these tags defined? They vary based on how the image was built MySQL's official image is located at:

15 Destroy Your Work - Shoot your cattle Stop and destroy the containers Brainstorm K Containerization with Docker Monday, March

16 Overview - No Hypervisor, Uses Docker Engine - Lightweight, easy to install application - Development environment is consistent - Code (ex. php) developed is highly portable - Configuration is consistent - Configured Apps (ex. mysql, httpd) are highly portable

17 Docker Compose - Tool for multi-container applications - Perfect for standing up an environment automatically

18 Example Stack - Lets write a Wordpress stack: - Wordpress - MySQL - HAProxy for SSL termination - Red Padlock Snakeoil SSL certificate for testing - Demo: - Portability - Green Padlocks for everyone - SSL with LetsEncrypt CA with a Docker Container

19 Orchestration - Goal of Containerization: - Automated Container Management (Orchestration) - Some popular container management tools are: - Google Kuberneties - Rancher Labs Inc. Rancher Docker Inc. Docker Swarm Example Purposes: XYZ wants a website > Click launch new Drupal stack. Compute Node is unresponsive > Launch on another node.

20 Brainstorm K Containerization with Docker Topic not covered due to time, that should be looked into (If you found this interesting) -Building ( Additional docs: -Docker Engine ( -Docker Compose ( Demo Resources: (Adam W Zheng) Crown Palm 2:30-3:30 Adam W Zheng adam.zheng@esu10.org