intro to rancher and rancheros

© 2015 Rancher Labs, Inc. © 2015 Rancher Labs, Inc.

Intro to Rancher and RancherOS Infracoders Meetup April 22, 2015

© 2015 Rancher Labs, Inc.

Introduction •  Will Chan – VP, Engineering/Co-founder •  Github: https://github.com/will-chan •  Twitter: @willchan00 •  Email: [email protected]

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Agenda •  Rancher - how it can help manage Docker containers at

scale •  RancherOS - why a micro OS for Docker makes sense •  Demo •  Q&A

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Docker adoption has exploded because developers love the user experience

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<50 ms

Docker provides significant benefits for IT operations

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Consistent image and configuration from laptop to production

Nearly instant deployment

(average for a VM is 30-45 seconds)

Ideal for production upgrades Enables microservices


However, most ops are hesitant to put Docker into production

1.  Lack of orchestration and management tools 2.  Lack of monitoring tools 3.  Lack of log management capabilities 4.  Lack of networking 5.  Lack of storage management 6.  Lack of multi-user management

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An orchestration platform designed to manage Docker environments and infrastructure at scale.

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Rancher addresses these issues and provides a platform for running Docker in production

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Bare metal servers

Linux Linux Linux Linux

Container Orchestration & Monitoring

User Management Service Discovery Resource Management

Networking & Storage Services

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Implementing and deploying Rancher

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Register Machines

•  Supports Docker Machine •  Support DigitalOcean, EC2, and

others

Manage Containers

•  Deploy and manage Docker containers across multiple hosts

•  Monitor container performance •  Monitor container utilization

Install Rancher •  Installs as a container on any

connected host •  Connect to Docker Repositories •  Connect to GitHub for User Mgmt

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Managing Infrastructure Services

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Deploy Load Balancers

•  Container-based HAProxy service •  Allow for up and downscaling as

needed •  Integrated with service discovery

Manage Storage

•  Manage Docker volumes •  Supports incremental snapshots to

object storage •  Snapshots are crash consistent

Dynamically Create Networks

•  Create private overlay network for each user environment based on IPSec tunneling

•  Network spans across hosts & clouds

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Container orchestration enables powerful application blueprinting

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docker-‐compose.yml lb: image: rancher/load-‐balancer ports: -‐ "80:80" links: -‐ web web: image: php links: -‐ db -‐ zookeeper zookeeper: image: zookeeper links: -‐ zookeeper db: image: mysql

As developers test their code, they create a docker-compose.yml to describe the application environment

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LB

Web

DB Zookeeper

Developers can run their docker-compose.yml directly on their laptop to test application functionality

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When an application is ready to move to scale testing or production, the developer creates a rancher.yml file

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rancher.yml lb: scale: min: 2 max: 5 healthcheck: interval: 5 target: "http:5000/healthcheck" zookeeper: scale: min: 5 max: 5 web: scale: min: 5 max: 100 db: external: myinstance.rds.amazon.com

Test/Staging/Production

When an application is ready to move to scale testing or production, the developer creates a rancher.yml file

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LB

Web

Zookeeper DB

Test/Staging/Production

Rancher then implements the complete environment, including networking, service discovery, service health checks, and storage

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© 2015 Rancher Labs, Inc. 16

Demo

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Features on horizon 1.  Native Docker Interface 2.  Snapshots 3.  Service Discovery (HA, Autoscaling, Heath

Monitoring, and Upgrades) 4.  Host Tag/Label for container orchestration 5.  Swarm/Clustering 6.  Support additional cloud providers

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A tiny Linux distribution designed for the sole purpose of running Docker containers.

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Wait a minute…

1. Doesn’t Docker run on any Linux? Yes. Docker runs on all modern Linux distribution. 2. Isn’t CoreOS the popular OS for running Docker? Yes, CoreOS has become popular for running Docker, because it removes lots of Linux packages that aren’t necessary for running containers.

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4GB 200 MB


Then why a new Linux distro for Docker? If we could “Dockerize” the OS: -  It would be very small (20mb), with just the services necessary to

run containers. -  Upgrades would be Docker -  It would make modifying the OS as easy as issuing a “docker

run” command -  We could swap kernels, consoles, and just about anything. -  We could use Docker Compose context to define the OS

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RancherOS is “Dockerized” Linux

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Linux Kernel

PID 1 System Docker

udev dhcp console

User-level containers

… System containers

User Docker initrd

… etcd

>sudo rancherctl service enable etcd

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Getting Started Rancher and RancherOS live in GitHub – Get Involved

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Support Join us at our Google Groups: https://groups.google.com/forum/#!forum/rancherio Join us at our IRC channel: #rancher

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intro to rancher and rancheros

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