moving from a host-centric infrastructure to a container-centric infrastructure

nics

　　https://kubernetes.io/docs/concepts/overview/what-is-kubernetes/
Why do I need Kubernetes and what can it do?
　　At a minimum, Kubernetes can schedule and run application containers on clusters of physical or virtual machines. However, Kubernetes also allows developers to ‘cut the cord’ to physical and virtual machines, moving from a host-centric infrastructure to a container-centric infrastructure, which provides the full advantages and benefits inherent to containers. Kubernetes provides the infrastructure to build a truly container-centric development environment.
　　Kubernetes satisfies a number of common needs of applications running in production, such as:

• Co-locating helper processes, facilitating composite applications and preserving the one-application-per-container model
  
• Mounting storage systems
  
• Distributing secrets
  
• Checking application health
  
• Replicating application instances
  
• Using Horizontal Pod Autoscaling
  
• Naming and discovering
  
• Balancing loads
  
• Rolling updates
  
• Monitoring resources
  
• Accessing and ingesting logs
  
• Debugging applications
  
• Providing authentication and authorization
  

　　This provides the simplicity of Platform as a Service (PaaS) with the flexibility of Infrastructure as a Service (IaaS), and facilitates portability across infrastructure providers.