Hello VMware community. I have come to a problem and ned your help.
I want to migrate a vm from vmware to kvm center. at the same time, keep the vm business is still online , or the bussines can be down for less than 3minuyes.
First of all, i should obtain a vmdk file which contains the full vm data,then convert it to qcow2 file.
There are the following steps:
1. enable cbt,take a snapshot,
2. call Vsphere web api QueryChangedDiskAreasans , get (offset ,length) list result;
3. with result from step 2 , get effective blocks from all allocated blocks from snap file, write these effective blocks to target vmdk file ;
4. take another snapshot, call QueryChangedDiskAreasans , and get (offset ,length) list result ,just get effective blocks from xxxx-delta.vmdk,then write these effective blocks to target file
repeat step 4 several times , when vm business is free then convert target file to qcow2 file.
my question is how to access xxxx-delta.vmdk between two snapshots and read effective blocks ?
what i want to do is get base data from step 2 and 3, combine inc content from serveral steps just like step 4, then i can get all i need,so as not to miss anything
Please help me ,thank you all.
