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akhilerm/BlockDevice upgrade

Last active August 4, 2020 04:15
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BlockDevice upgrade
Flowchart for local pv upgrade
NOTE: Does not support upgrade of localPV rawblock
For Cstor, the same flowchart as below applies, but instead of using FSUUID annotation, partition table UUID
annotation will be used.
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LocalPVFSUpgrade.pdf
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@kmova, There will be slight change in design for checking with FSUUID, found a bug when testing with multiple virtual devices:

  1. 2 virtual devices are connected to the node, One is claimed and one unclaimed.
  2. NDM is upgraded to latest version
  3. Node is rebooted and devices swap their path
  4. The above design updates the incorrect blockdevice , because it first finds a device with matching legacy UUID.

Solution:
Even after getting matching legacy UUID , a check for partitionuuid or fsuuid need to be done.

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