Convert old LINSTOR flexVolumes to CSI

Script takes PersistentVolumes with Linstor flexVolume driver or old-style CSI metadata, which stopped working after last update of linstor csi-plugin and generates commands for update their metadata to use with new csi-plugin.

• piraeusdatastore/linstor-csi#4 flexvolume (migrate flexvolumes to csi)
• piraeusdatastore/linstor-csi#7 csi1 (migrate csi to use right volume names)
• piraeusdatastore/linstor-csi#11 csi2 (update csi to use right driver name)

• Make sure that you have jq and kubectl installed in your system.

• Download the script:

  curl -LO https://github.com/kvaps/linstor-csi-migrator/raw/master/linstor-csi-migrator.sh
  chmod +x linstor-csi-migrator.sh
  

• Make sure that you have access to list PVs in your cluster.

• Generate commands:

  # FlexVolumes:
  ./linstor-csi-migrator.sh flexvolume > flexvolume_commands.sh
  # Old format CSIs:
  ./linstor-csi-migrator.sh csi1 > csi1_commands.sh
  # CSIs with old driver name:
  ./linstor-csi-migrator.sh csi2 > csi2_commands.sh
  

• Create backup of your Persistent Volumes:

  kubectl get pv -o json > pv.json
  

• Now you can open *_commands.sh and apply the changes.

• To avoid problems with pods termination, before upgrade flexvolume volumes, please stop all the workload.

• During csi2 upgrade, you should also change drivername for running pods, on every node run:

  sed -i 's/io.drbd.linstor-csi/linstor.csi.linbit.com/g' `find /var/lib/kubelet/pods/ -mindepth 5 -maxdepth 5 -name vol_data.json`