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© 2015 Rancher Labs, Inc.© 2015 Rancher Labs, Inc .
Container Orchestration Compared
Kubernetes and Docker Compose/Swarm
Darren Shepherd
ContainerDays NYC 2015

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© 2015 Rancher Labs, Inc.1
Darren Shepherd
Co-founder and Chief Architect
Rancher Labs, Inc.
@ibuildthecloud

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© 2015 Rancher Labs, Inc.
Containers
• I like containers
• You like containers
• Lets deploy some containers
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© 2015 Rancher Labs, Inc.
Container Progression
• Self contained dev environment
• Self contained builds
• Continuous Integration
• Deploying microservices in production
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© 2015 Rancher Labs, Inc.
What do you need
• SDN
• Health Checks
• Service Discovery
• Secrets Management
• Application Templating
• Service Orchestration
• Load Balancing
• Scheduling
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• Configuration Management
• Upgrade Management
• User Management/RBAC
• Monitoring
• Log Management

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© 2015 Rancher Labs, Inc.
What is Rancher?
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Rancher Container Infrastructure
Resources (Clouds, VMs, Servers)
Environment
Kubernetes
Environment
Swarm
User Directory Container Registry
Environment
Native Rancher Orchestration

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© 2015 Rancher Labs, Inc.
Swarm/Compose vs Kubernetes
• Easy to
use/Familiar
• Great for
development
• Lacking in Service
Management
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• Steeper Learning
Curve
• New non-Docker
Concepts
• Technically very
powerful
• Fairly Complete

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© 2015 Rancher Labs, Inc.
Rancher Native Orchestration
Easy of use of Docker
• Docker Compose Syntax
• Docker Native Support – “docker run”
Power of Kubernetes
• Labels, Selectors
• Sidekick (AKA Pods)
• Services
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And More
• Managed Upgrades
• Load Balancing

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© 2015 Rancher Labs, Inc.
Scheduling
• Affinity/Anti Affinity
• Label
• Image
• Container
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• Stack
• Spread
• Port Conflicts

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© 2015 Rancher Labs, Inc.
Services
• Group of containers serving a common
purpose
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© 2015 Rancher Labs, Inc.
Services – Compose/Swarm
• Deploy X from same container definition
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Container 1 Container 2 Container 4Container 3

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© 2015 Rancher Labs, Inc.
Services - Kubernetes
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Container 1 Container 2 Container 4Container 3
Replication Controller
Service

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© 2015 Rancher Labs, Inc.
Service Discovery
• Kubernetes
DNS -> Service IP (Cluster IP)
• Swarm
resolver based host lookup
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© 2015 Rancher Labs, Inc.
Service Reconciliation
We should do something about bad containers
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© 2015 Rancher Labs, Inc.
Sidekick/Sidecar/Pods
A set of containers deployed as a unit
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