理解hint based autodiscover||Pod annotations

• Overview

  Kubernetes autodiscover provider supports hints in Pod annotations.

  Docker autodiscover provider supports hints in labels.

• Autodiscover

• Web Proxy Auto-Discovery Protocol

  The Web Proxy Auto-Discovery Protocol(WPAD) is a method used by clients to locate the URL of a configuration file using DHCP and/or DNS discovery methods.

• Autodiscover service in Exchange Server

  The Autodiscover service minimizes user configuration and deployment steps by providing clients access to Exchange features.

• Autodiscover in Elasticsearch

  《理解multicast vs unicast》

  As for autodiscovery, ES uses local network multicast by default.

  You can switch to unicast and you probably want to change the default clustername to prevent accidents.

  When you run applications on containers, they become moving targets to the monitoring system. Autodiscover allows you to track them and adapt settings as changes happen.

• Pod annotations vs hints in labels

  Kubernetes Labels 和 Annotations 最佳实践

  Labels and Annotations in Kubernetes

  Understanding Labels, Selectors and Annotations in Kubernetes

  Annotations and labels are both seem to be simple key-value pairs, meant to add metadata to a Kubernetes setup.

  Labels contain identifying information and are used by selector or within selector sections in object definitions.

  Annotations are used for non-identifying information. Stuff not used internally by k8s. You can’t specify selectors over them within Kubernetes, but then can be used by external tools and libraries.

• References

1. Understanding Elastic Search
2. Filebeat