Hello All,
I tried to install 3.6.8 version on our new server to keep up with old server mongo version so that I can dump data and restore.Where I tried this at 4th step However its saying Unable to find packages for all these .Can someone help me. If not let me know how I can dump and restore from older version to newer version.
sudo apt-get install -y mongodb-org=3.6.8 mongodb-org-server=3.6.8 mongodb-org-shell=3.6.8 mongodb-org-mongos=3.6.8 mongodb-org-tools=3.6.8
Hi @priyatham_ik,
MongoDB 3.6 reached End Of Life (EOL) in April 2021 so it is likely you are using a newer version of Debian than may be supported: MongoDB 3.6 Supported Platforms.
Some possible approaches in order of recommendation:
Try using mongodump from the standalone MongoDB Database Tools. Compatibility is not tested as far back as 3.6 so this is not guaranteed to work, but would be worth trying.
Download MongoDB 3.6 from the Archived Releases page. The “Linux (legacy) x64” tarball would be the most straightforward to work with since you are only looking to use database tools.
If you are using Debian 8 or 9 (the only versions with MongoDB 3.6 packages) you could try following the instructions to Install MongoDB 3.6 on Debian. However, since MongoDB 3.6 is an End-Of-Live version you may encounter issues such as expired public keys for package signing.
Regards,
Stennie
Hello @Stennie_X ,
I have installed the 4.4 version on new server and did this mentioned below to dump and restore from old db to new db
ssh -fN -L 27018:localhost:27017 <remote_host>
mongodump --port 27018 --db <remote_db_name> --username <remote_db_username> --password <remote_db_password> --archive | mongorestore --username <destination_db_username> --password <destination_db_password> --archive
After running these commands on my new server I see my db when I do show dbs on mongo shell however when I change the port to 27018 in mongodb config file in order to run this restored db its throwing error and exiting with 42 saying address already in use and Its happening because of the ssh tunnel and when I kill the port and re run it now I dont see the restored DB .
Can anyone help me ?
Why you want to start mongod again?
Just connect to your restored db using the correct port 27017
Show us how you are connecting with screenshots
Hello @Ramachandra_Tummala ,
On my new server I have restored to the port 27018 as per my previous commands when I type mongo and run show dbs I can see the restored db however when I check sudo service mongod status its showing inactive
Here is what it shows when I do show dbs by entering the mongo shell using mongo --port 27018
show dbs
MyDB 0.018GB
admin 0.000GB
config 0.000GB
local 0.000GB
playlist 0.000GB
test_playlist 0.000GB
Here is what I get when I do sudo service mongod status and I have updated port to 27018 in config file
Are you sure you restored to your mongod on port 28000
Your mongodump is from port 28000 which you piped to restore on localhost on default port 27017
What do you see if you issue just mongo
@Ramachandra_Tummala
Yes I’m certainly sure that I restored to port 27018 and I followed the second answer from this post How do I copy a database from one MongoDB server to another? - Stack Overflow.
If I understood it correctly I have ran the ssh tunnel on new server which makes all the request forwarded through port 27018 to old server (the db from which Im going to dump) with default port.
when I do mongo on new server this is what I get -
mongo
MongoDB shell version v4.4.17
connecting to: mongodb://127.0.0.1:27017/?compressors=disabled&gssapiServiceName=mongodb
Error: couldn’t connect to server 127.0.0.1:27017, connection attempt failed: SocketException: Error connecting to 127.0.0.1:27017 :: caused by :: Connection refused :
connect@src/mongo/shell/mongo.js:374:17
@(connect):2:6
exception: connect failed
exiting with code 1
However when I do mongo --port 27018 on the same new server this is what I get-
mongo --port 27018
MongoDB shell version v4.4.17
connecting to: mongodb://127.0.0.1:27018/?compressors=disabled&gssapiServiceName=mongodb
@Ramachandra_Tummala @Stennie_X
Thanks for your help and Info guys ,Finally I was able to dump and restore this way-
From new server I dumped remotely using : mongodump --host =10.10.10.10(remotehost) --port=27017 and
then restored in newserver: mongorestore --port=27018
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