Ceph RBD rollback image

[BadKid90s]

How to determine if Ceph RBD rollback image is successful?

How to determine if the rollback is successful using the command line or HTTP API?

[phlogistonjohn]

Are you asking if how to tell if the function

go-ceph/rbd/snapshot.go

Line 88 in d564eff

func (snapshot *Snapshot) Rollback() error {

succeeded?

On an API level you should be checking the error is not nil. If you mean on some sort of higher level, you'd probably have to build something like a function that checksums an image before snapshotting and then verifies it after rollback. If you asking for something even more than that I suggest talking to the Ceph team directly because go-ceph is focused on making the Ceph APIs available, not making sure they work.

I don't really know what command line or HTTP you might be referring to. Again, if you're looking for general Ceph help you may want to try the ceph lists: https://lists.ceph.io/hyperkitty/list/[email protected]/

[BadKid90s]

Perform a checksum on the image before the snapshot, and then validate it after the rollback. How should it be operated? How to calculate the comparative checksum?

[phlogistonjohn]

If I was going to implement that I would use the image read apis to copy the bytes into one of Go's hash algorithms like sha256.

Just as a reminder go-ceph provides the Ceph apis as a golang library, what you do with those apis is up to you. So take my suggestion above with a grain of salt, because I really don't know what your ultimate goal is. :-)

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