April 2018
Intermediate to advanced
374 pages
8h 35m
English
Content preview from Kubernetes for Developers
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Kubernetes resource – ReplicaSet
A ReplicaSet wraps Pods, defining how many need to run in parallel. A ReplicaSet is commonly wrapped in turn by a deployment. ReplicaSets are not often used directly, but are critical to represent horizontal scaling—to represent the number of parallel Pods to run.
A ReplicaSet is associated with a Pod and indicates how many instances of that Pod should be running within the cluster. A ReplicaSet also implies that Kubernetes has a controller that watches the ongoing state and knows how many of your Pod to keep running. This is where Kubernetes is really starting to do work for you, if you specified three Pods in a ReplicaSet and one fails, Kubernetes will automatically schedule and run another Pod for you. ...
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