April 2018
Intermediate to advanced
468 pages
14h 34m
English
Content preview from Mastering Kubernetes - Second Edition
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GCE persistent disk
The gcePersistentDisk volume type is very similar to awsElasticBlockStore. You must provision the disk ahead of time. It can only be used by GCE instances in the same project and zone. But the same volume can be used as read-only on multiple instances. This means it supports ReadWriteOnce and ReadOnlyMany. You can use a GCE persistent disk to share data as read-only between multiple pods in the same zone.
The pod that's using a persistent disk in ReadWriteOnce mode must be controlled by a replication controller, a replica set, or a deployment with a replica count of 0 or 1. Trying to scale beyond 1 will fail for obvious reasons:
apiVersion: v1kind: Podmetadata: name: some-podspec: containers: - image: some-container name: ...
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