forked from rook/rook
Blaine Gardner
4f555dbbcb
Add new CSI_DISABLE_HOLDER_PODS option for rook-ceph-operator. This option will disable holder pods when set to "true". In the long term, Rook plans to deprecate the holder pods entirely. This new option will allow users to choose to migrate their clusters to non-holder clusters when they are ready and able, giving them time to gracefully migrate before the holders are permanently removed. This option is set to "false" by default so that upgrading users don't have their CSI pods modified unexpectedly. Example manifests are modified to set this value to true so that new clusters will not deploy holder pods. Migrating users are provided with documentation to instruct them about the new requirements they need to satisfy to successfully remove holder pods, a procedure for migrating pods from holder to non-holder mounts, and a way to delete holder pods once they are no longer in use. When users set CSI_DISABLE_HOLDER_PODS="true", the CSI controller will no longer deploy or update the holder pod Daemonsets, but it does not delete any existing Daemonsets. This allows already-attached PVCs to continue operating normally with their network connection continuing to exist in the current holder pod. This is critical to avoid causing ia cluster-wide storage outage. More info: https://github.com/rook/rook/issues/13055 Signed-off-by: Blaine Gardner <blaine.gardner@ibm.com>