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Fix link for factory methods of informers

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Nikhita Raghunath 2017-05-14 01:15:30 +05:30
parent 433a340811
commit 8decfe42b8
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contributors/devel/controllers.md
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@ -32,11 +32,11 @@ When you're writing controllers, there are few guidelines that will help make su
1. Use `SharedInformers`. `SharedInformers` provide hooks to receive notifications of adds, updates, and deletes for a particular resource. They also provide convenience functions for accessing shared caches and determining when a cache is primed.
Use the factory methods down in https://github.com/kubernetes/kubernetes/blob/master/pkg/controller/informers/factory.go to ensure that you are sharing the same instance of the cache as everyone else.
Use the factory methods down in https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/client-go/informers/factory.go to ensure that you are sharing the same instance of the cache as everyone else.
This saves us connections against the API server, duplicate serialization costs server-side, duplicate deserialization costs controller-side, and duplicate caching costs controller-side.
You may see other mechanisms like reflectors and deltafifos driving controllers. Those were older mechanisms that we later used to build the `SharedInformers`. You should avoid using them in new controllers
You may see other mechanisms like reflectors and deltafifos driving controllers. Those were older mechanisms that we later used to build the `SharedInformers`. You should avoid using them in new controllers.
1. Never mutate original objects! Caches are shared across controllers, this means that if you mutate your "copy" (actually a reference or shallow copy) of an object, you'll mess up other controllers (not just your own).