Module 7
Storage
A container's filesystem disappears with the container. Volumes, PersistentVolumeClaims, StorageClasses and CSI drivers give Pods durable data.
Why it matters. Stuck Pending Pods, volumes that cannot attach, and deleted data are the classic storage incidents. All of them follow from the PV and PVC lifecycle and from zone and access-mode rules.
After this module you can answer
- What is the difference between a PV and a PVC?
- How is a volume created on demand?
- Why do zonal disks need WaitForFirstConsumer?
- What do RWO, ROX and RWX mean?
- How do snapshots, clones and expansion work?
What is inside
1PV, PVC, StorageClass
2Dynamic provisioning
3Topology and access modes
4CSI features and StatefulSets
5Module infographic