What are containers ?

Need for orchestration

• To run containers at scale
• Optimally using system resources
• Fault Tolerance
• Autoscaling
• ....

Container Orchestrator

• Docker Swarm
• Kubernetes
• Mesos Marathon
• Hashicorp Nomad
• Amazon ECS
• Fleet

Container Management Platforms

• Tectonic
• Rancher
• Platform9

What is needed to do the Container Orchestration

Multiple Nodes to be part of a cluster

Unique ID/Token to bind all the nodes in a unique cluster

Container Engines

• runC
• Docker
• Rkt

Single source of truth about configuration for nodes

• Key-Value Store like etcd, consul

Network for containers of different nodes to talk to each other

• Some form of Overlay network like VxLAN.
• With possibility to plug different neworking solution like Calico.
• TODO

One or more cluster master to manage the cluster and schedule the jobs/tasks

Scheduler to schedule the containers on nodes based on

• Constraints, like run the container where SSD storage is available
• Affinity

Service discovery within the cluster

• Internal DNS server
• Through environment variables
• Load balancer, HA proxy

Access the services from external world

Access to external shared storage