Virtual Machines

Virtual Machines

• Virtualize hardware
• Virtualize OS
• For every VM

Containers

What are containers?

• Linux virtualization
• Operating-system level
• Share operating system and kernel with host

Why do you care?

• Consistent environments
• Development
• Testing
• Deployment

Consistent environments

• Dependencies
• Same versions
• Versioned dependencies
• Reproducable

Development

• All developers need the same versions of libraries
• Dependency hell

Testing

• Tests must be consistent

Deployment

• Simplify deployment
• One step to build