Deploying Containers
with Rancher
Chris Tankersley
@dragonmantank
Day Camp 4 Developers, Ops for Devs
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What Is Rancher?
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Rancher and RancherOS
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Why Use Rancher?
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Manages your Containers
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Manages your Hosts
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Allows you to monitor containers
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Allows you to manage your applications
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Allows you to deploy your applications
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Allows you to deploy your applications
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Supports Docker Compose
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Installation
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Install Docker on a machine
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Using Docker Machine
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Our Setup
• 3 Machines
• 1 Rancher Server
• 2 Rancher Nodes
• All running RancherOS
• Docker 1.11
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docker-machine Command
docker-machine create -d virtualbox
--virtualbox-boot2docker-url http://releases.rancher.com/os/latest/rancheros.iso
--virtualbox-memory “2048”
[node name]
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hMp://docs.rancher.com/os/running-rancheros/workstaQon/docker-machine/

Machines Build
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Add rancher/server to the master
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docker run -d
--restart=always
-p 8080:8080
–name=rancher
rancher/server

Add rancher/agent to nodes
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docker run -d
--privileged
-v /var/run/docker.sock:/var/run/docker.sock
rancher/agent:v0.7.9
http://192.168.99.100:8080/v1/scripts/[hash]

All Done!
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Manual Container Deployments
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Add Container to Node
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Fill out Container Info
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Wait for it to become active
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Wait for it to become active
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See it running
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Visit the Container
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Metrics
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Viewing Container Metrics
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Viewing Host Metrics
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Stacks
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What are Stacks?
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Adding a Service
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Adding a Service
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Adding a Service
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Adding a Service
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Adding a Service
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Rancher Auto-Deploys
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Add an Apache/PHP Service
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Let it deploy
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Visit the web server
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Check Deployments in Infrastructure
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Custom Repositories
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Adding Private/Custom Registry
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Type in Auth Info
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All the nodes can use it!
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Deploying Upgrades
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Deployment Types
• Blue-Green Deployments
• Rolling Deployments
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Blue-Green Deployments
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Router
App v1 App v2

Blue-Green Deployments
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Router
App v3 App v2

Blue-Green Deployments
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Router
App v3 App v2

Rolling Deployments
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App v1

Rolling Deployments
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App v2

Rolling Deployments
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App v2

New Container for Web Server
# Dockerfile
FROM php:apache
COPY index.php /var/www/html
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Push to Docker Hub
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Upgrade Webserver Container
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Upgrade Webserver Container
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Rancher Upgrades it
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Rancher lets us know it’s done
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Check Container once Upgraded
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Rollback or Finish
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Do it again
• Edit My Code
• Build My Image
• Push to Docker Hub
• Upgrade the Service
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Rancher CLI
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What is it?
• Rancher has an API!
• Small executable that interacts with Rancher API
• Kind of like a custom docker-compose
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Get an API Key
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Get an API Key
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Download Rancher CLI
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Export Stack Config
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Two Config Files
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docker-compose.yml
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Deploy Script
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ACCESS_KEY="C4F407CE1D8C59EB53BE"
SECRET="daNENHR241Jzm5Z9iw6VsujD9hWfjHWrDzkKmKiA"
RANCHER_URL="http://192.168.99.100:8080"
./rancher-compose --secret-key=${SECRET} --access-key=${ACCESS_KEY} --url=${RANCHER_URL} --
file=docker-compose.yml --rancher-file=rancher-compose.yml -p phptest up --upgrade -d

Edit and Deploy
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Edit and Deploy
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Finish Upgrade
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Storage Pools
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What do they do?
• Convoy
• Plugins that allow distributed volumes
• GlusterFS, NFS
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Networking
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Key Features
• Deployments keep links intact
• Networks can span hosts
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Thanks!
- Docker for Developers
- LearningContainers.com
- hMp://ctankersley.com
- @dragonmantank
- chris@ctankersley.com
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