Kubernetes manages endpoints through the Endpoints object, which tracks the network addresses of the pods that are associated with a service. Here's how it works:
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Service Definition: When a service is created, it includes a selector that identifies the pods it targets based on their labels.
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Endpoint Controller: The Endpoint Controller continuously monitors the state of the pods that match the service's selector. It watches for changes in pod status, such as creation, deletion, or updates.
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Endpoints Object: The Endpoint Controller updates the Endpoints object with the IP addresses and ports of the matching pods. This object contains a list of all the active endpoints for the service.
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Dynamic Updates: As pods are added or removed, the Endpoint Controller dynamically updates the Endpoints object. This ensures that the service always has an up-to-date list of healthy pods to route traffic to.
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Load Balancing: When a client sends a request to the service, Kubernetes uses the Endpoints object to determine which pod to route the request to, enabling load balancing among the available pods.
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Health Checks: If a pod fails or becomes unhealthy, it is removed from the Endpoints object, preventing traffic from being sent to it.
By managing endpoints in this way, Kubernetes ensures that services can reliably route traffic to the appropriate pods, maintaining high availability and scalability.
