Is it possible to execute a command in a container before backups?

Dec 25, 2017
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Is it possible to execute a command in a container before backups?
Сan be using vzdump hook (--script)?

I want to execute 2 commands:
pct exec $3 -- psql -c \"CHECKPOINT;\""
pct exec $3 -- sync
before backups.

or for this vzdump hook (--script) is not suitable?
 

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