Is my Mongodb installation correct?

[phenomlab]

@ahmed thanks for the url. I’ll check this later.

[ahmed]

@phenomlab
Thank you for taking the time to answer my questions.

[phenomlab]

@ahmed anytime

[ahmed]

@phenomlab

What could be the reason why mongodb gives this error when trying to take a backup?

root@localhost:~# sudo systemctl stop mongod
root@localhost:~# sudo systemctl status mongod
○ mongod.service - MongoDB Database Server
     Loaded: loaded (/lib/systemd/system/mongod.service; enabled; vendor preset: enabled)
     Active: inactive (dead) since Sun 2024-03-24 18:48:04 +03; 21s ago
       Docs: https://docs.mongodb.org/manual
    Process: 61116 ExecStart=/usr/bin/mongod --config /etc/mongod.conf (code=exited, status=0/SUCCESS)
   Main PID: 61116 (code=exited, status=0/SUCCESS)
        CPU: 2.034s

Mar 24 18:47:01 localhost systemd[1]: Started MongoDB Database Server.
Mar 24 18:47:01 localhost mongod[61116]: {"t":{"$date":"2024-03-24T15:47:01.540Z"},"s":"I",  "c":"CONTROL",  "id":7484500, "ctx":"main","msg":"Environment variable MON>
Mar 24 18:48:04 localhost systemd[1]: Stopping MongoDB Database Server...
Mar 24 18:48:04 localhost systemd[1]: mongod.service: Deactivated successfully.
Mar 24 18:48:04 localhost systemd[1]: Stopped MongoDB Database Server.
Mar 24 18:48:04 localhost systemd[1]: mongod.service: Consumed 2.034s CPU time.
lines 1-14/14 (END)
[6]+  Stopped                 sudo systemctl status mongod
root@localhost:~# mongodump
2024-03-24T18:49:15.964+0300    Failed: can't create session: failed to connect to mongodb://localhost/: server selection error: server selection timeout, current topology: { Type: Single, Servers: [{ Addr: localhost:27017, Type: Unknown, Last error: connection() error occurred during connection handshake: dial tcp 127.0.0.1:27017: connect: connection refused }, ] }
root@localhost:~#
root@localhost:~#
root@localhost:~# mongodump --port 27017 -u "nodebb" -p "Em26452645" --db=nodebb --out=backup/ahmed
2024-03-24T18:50:25.654+0300    Failed: can't create session: failed to connect to mongodb://localhost:27017/: server selection error: server selection timeout, current topology: { Type: Single, Servers: [{ Addr: localhost:27017, Type: Unknown, Last error: connection() error occurred during connection handshake: dial tcp 127.0.0.1:27017: connect: connection refused }, ] }
root@localhost:~#

[phenomlab]

@ahmed the database needs to be running to use MongoDump.

[ahmed]

@phenomlab

Nodebb.org documentation states that Mongodb must be stopped before backup
nodebb.org documentation should be updated
I think I saw it wrong

I will try as you say

[phenomlab]

@ahmed I never stop the database when backing up. Never did it with mysql either. I’m not saying it’s right but it’s always worked for me and the backup schedules I’ve created for others who have used that to perform recovery.

[ahmed]

@phenomlab

I’m trying to take a backup while Mongodb is running, but this time it gives an authentication error.

root@localhost:~# mongodump --port 27017 -u "nodebb" -p "Em26452645" --db=nodebb --out=backup/ahmed
2024-03-24T19:15:41.690+0300    Failed: can't create session: failed to connect to mongodb://localhost:27017/: connection() error occurred during connection handshake: auth error: unable to authenticate using mechanism "SCRAM-SHA-256": (AuthenticationFailed) Authentication failed.
root@localhost:~#
root@localhost:~#
root@localhost:~#
root@localhost:~# mongodump
2024-03-24T19:15:54.554+0300    Failed: error creating intents to dump: error getting database names: (Unauthorized) Command listDatabases requires authentication

[phenomlab]

@ahmed are you backing up remotely?

Try this - obviously, substitute where necessary to match your environment

mongodump -u root --password 'secret' --authenticationDatabase admin

[ahmed]

@phenomlab
I think it finally happened

mongodump --port 27017 -u "nodebb" -p "Em26452645eses" --db=nodebb --out=backup/ahmed
2024-03-24T20:39:20.788+0300    writing nodebb.sessions to backup/ahmed/nodebb/sessions.bson
2024-03-24T20:39:20.792+0300    done dumping nodebb.sessions (21 documents)
2024-03-24T20:39:20.805+0300    writing nodebb.objects to backup/ahmed/nodebb/objects.bson
2024-03-24T20:39:20.811+0300    done dumping nodebb.objects (714 documents)

[ahmed]