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# Major Themes
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v1.8...
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## K8s Version Support
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## Upgrade Guides
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## Breaking Changes
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- Flex driver is fully deprecated. If you are still using flex volumes, before upgrading to v1.8
you will need to convert them to csi volumes. See the flex conversion tool.
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- Min supported version of K8s is now 1.16. If running on an older version of K8s it is recommended
to update to a newer version before updating to Rook v1.8.
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- Directory structure of the YAML examples has changed. Files are now in `deploy/examples` and subdirectories.
### Ceph
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## Features
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- The Rook Operator does not use "tini" as an init process. Instead, it uses the "rook" and handles
signals on its own.
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- Rook adds a finalizer `ceph.rook.io/disaster-protection` to resources critical to the Ceph cluster
(rook-ceph-mon secrets and configmap) so that the resources will not be accidentally deleted.
- Add support for [Kubernetes Authentication when using HashiCorp Vault Key Management Service ](Documentation/ceph-kms.md##kubernetes-based-authentication ).
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- Bucket notification supported via CRDs
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- The Rook Operator and the toolbox now run under the "rook" user and does not use "root" anymore.
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- The Operator image now includes the `s5cmd` binary to interact with S3 gateways.
