I have a question about how to restore a backup in case I need to restore it in a complete new environment. So imagine my original MongoDB replicaset is completely crashed and can no longer be used. Since Percona Backup is using the admin db for storing the PBM Control Collections they would also be lost. How can I start in a complete new environment, with restoring from an environment that is no longer accessible. So I would have only access to the backup-storage. Thanks in advance!
Hi, welcome to the forum. You may refer to Restore a Replica Set to a New Environment with Percona Backup for MongoDB - Percona Database Performance Blog for instructions.
Thanks for the quick answer. This is article is answering kost of my questions. But to summarize it, to restore it into a new environment I need to create a new replicaset by hand and add the pbmuser with a script. So will the full restore then overwrite the admin db or not? If not, I would have to create all users from the original admin db.
PBM should restore the users for you so no need to create them yourself
Thanks, sounds great!
I just followed your instructions to test it, but the users from the original admin-db were not restored. I also couldn’t see that collection in the logs that you posted in your article. Is it a bug or by intention?
I just wanted to mention that I restored from a logical backup
on which db you created users? is that in admin? also which PBM version are you running?
Version: 2.0.2 Platform: linux/amd64 GitCommit: 3ec38a5fc6706515fb1be72b015972af1500aa17 GitBranch: release-2.0.2 BuildTime: 2022-10-24_12:16_UTC GoVersion: go1.19
This is the version of the pbm binary
The users are created in the admin db. By the way, when I did the restore from a physical backup, all users were restored.
This is strange as I tested the same version and the users collection is correctly backed up and restored.
Nov 02 17:12:19 mongo0 pbm-agent: 2022-11-02T17:12:19.687+0000 writing admin.system.users to archive on stdout Nov 02 17:12:19 mongo0 pbm-agent: 2022-11-02T17:12:19.689+0000 Mux open namespace admin.system.users Nov 02 17:12:19 mongo0 pbm-agent: 2022-11-02T17:12:19.689+0000 counted 3 documents in admin.system.users Nov 02 17:12:19 mongo0 pbm-agent: 2022-11-02T17:12:19.691+0000 done dumping admin.system.users (3 documents) Nov 02 17:12:19 mongo0 pbm-agent: 2022-11-02T17:12:19.691+0000 Mux close namespace admin.system.users
Nov 02 17:14:02 mongo0 pbm-agent: 2022-11-02T17:14:02.471+0000 found collection admin.system.users bson to restore to admin.system.users Nov 02 17:14:02 mongo0 pbm-agent: 2022-11-02T17:14:02.471+0000 found collection metadata from admin.system.users to restore to admin.system.users Nov 02 17:14:02 mongo0 pbm-agent: 2022-11-02T17:14:02.471+0000 adding intent for admin.system.users
Thank you for your effort. I’ll test it tomorrow again.