tree 095ed006c7398afe9bf1e7828f54567539db9833
parent d73c1c02c79912fcaffc7637405cdf95ec4606a9
author ricolin <rlin@vexxhost.com> 1667081882 +0800
committer ricolin <rlin@vexxhost.com> 1667342455 +0800

Add openstack resource puller

Add puller in BackupManager, DB and Object to keep only one node to pull
volume-server attachment information from OpenStack.
To have multiple puller is okay, but with this, we can reduce unnecessary API
calls to OpenStack.