Multiple secondary storage in one zone; problem with volume snapshots #9754
Replies: 11 comments
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Example of successful snapshot to the first secstore
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Example when first volume snapshot was copied to the second secstore and I try to create the next volume snapshot
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Regarding the first issue of all/most snapshots going to one store, it would be helpful knowing the following:
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@Pearl1594 1. the same capacity. Second is a copy of first |
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@Pearl1594 if I set first secstore Read-Only, snapshots are copied to the second secstore. But after I unset Read-Only all snapshots are copied to the first secstore again |
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when creating the volume snaphots, were they are initiated at the same time i.e, either via API or through recurring snapshot schedule. If that was the case, this could possible happen because the stats collector would not have run to has updated the stats of the secondary store(s) to make the decision that store1 has capacity < than store2. Marking store1 to read only excludes it from the list of stores to which snapshot would be backed up to - expected behaviour. |
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@Pearl1594 Why is it converted into disscussion? It is a really problem. I can add multiple sectores, but it is useless because only the first secstore will work. |
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@Pearl1594 Any suggestions how to use several secstores at the same time? |
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@top-secrett about converting it to a discussion, the reason was to first understand if this is a bug or an issue with the setup / just the behaviour. Could you also please shed some more light on this point:
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@top-secrett ok, for now I have 2 secstores. New snapshot of new VM was placed on second secstore. Why all new snapshots are placed on only one storage even if its capacity is almost full?
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@Pearl1594 any suggestions how to solve this? |
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ISSUE TYPE
CLOUDSTACK VERSION
SUMMARY
We are planning to add multiple NFS secondary storages for backup purpose. And I don't understand the principle of distribution of storage snapshots among secstors.
I created 10 Intsances in one Account and all their volume snapshots exept one were copied to the first secstore. Only one volume snapshot was copied to the second NFS secstore, but I can't create addiditinal snapshots of this volume. I attach logs in comments.
STEPS TO REPRODUCE
Add multiple NFS secondary storages, try to create volume snapshots of different instances
EXPECTED RESULTS
Snapshots are copied based on free space allocation mode to all secstores
ACTUAL RESULTS
All snapshotes are copied to the first secstore
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