House rules:

• All nodes have to be able to talk to each other
• All Pods can talk to one another without NAT
• Every Pod gets its own IP address

• Each pod sees itself as its own internal IP address, and every other pod sees it as that too
  • There is no internal/public IP difference
  • All pods can see each other
• Each Node is allocated a subset IP range

Networking Services

How do other pods that rely on others know which ones are healthy or unhealthy?

• Network abstraction that ensures you are talking to a healthy instance

Services

Every service gets a name and an IP

• Stable IP and name: they do not change, ever
• Every cluster can have a DNS service
  • Every pod knows how to use it
• Service as a load balancer / proxy
• Can use a label selector to choose which pods are served

• New objects that fit the label are automatically added to the Search service / endpoint object
• Endpoint target will always have the same name as the Search service it’s associated with