Sync directly to the App PVC and save crash-consistent snapshot at de…#26
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Sync directly to the App PVC and save crash-consistent snapshot at de…#26BenamarMk wants to merge 2 commits into
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…stination Set up VolSync to save the last known good snapshot at the destination. This snapshot is replaced with a newer one every time a successful sync is complete. When the Application is failed over or relocated, this last snapshot will be retained for as long as the workload is deployed. Here is an example of what happens on initial deployment, failover, relocation, failover again, and then the workload is undeployed. Let's assume we have 2 clusters [Cp, Cf]. Cp is the preferred cluster, and Cf is the failover cluster. Sx represents the snapshot retained: Initial Deployment ================== Cp= Cf=S1 after every successful sync a new snapshot is taken and the old one is deleted. Failover to Cf ============== Cp=S2 after every successful sync a new snapshot is taken and the old one is deleted. Cf=S1 Relocate ======== Cp=S2 Cf=S1,S3 in this scenario S1 is saved forever, but S3 is refreshed as above Failover ======== Cp=S2,S4 in this scenario S2 is saved forever, but S4 is refreshed as above Cf=S1,S3 Updeploy the workload ===================== Cp= Cf= Fixes RamenDR#665 Signed-off-by: Benamar Mekhissi <bmekhiss@redhat.com>
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Signed-off-by: Benamar Mekhissi <bmekhiss@redhat.com>
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Signed-off-by: Benamar Mekhissi bmekhiss@redhat.com