January 2019
Intermediate to advanced
484 pages
11h 48m
English
Content preview from DevOps with Kubernetes - Second Edition
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Dynamic admission control
Before Kubernetes 1.7, admission controllers were compiled with Kubernetes API server, so they could only be configured before the API server started. Dynamic admission control aimed to break this limitation. There are two methods to implement custom dynamic admission control: via initializer and admission webhooks. The Initializer webhook can watch an uninitialized workload and check whether it needs to take any action against it.
The Admission webhook intercepts the request and checks the preset rules from its configuration before deciding whether the requests are allowed or not. Both the initializer and admission webhooks can admit and mutate the resource request on certain operations, so we can leverage them ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.