Informers are very important concepts/construct to know if about if you are planning to write your own custom controller. In this particular chapter, we look into what exactly are informers and the caching mechanism that it uses. Apart from that we also look into some other things for example when to use FilteredSharedInformerFactory instead of SharedInformersFactory and the difference between them. We will understand the comparison of informers with the watch and why we don't use the watch verb in favor of informers.
Basics of client-go Kubernetes
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