How to connect 2.6 mongo shell to 2.4.9 mongod?

I tried to install mongo

2.6 individually, but it caused other packages to be marked for removal. I ended up just uninstalling the old packages and reinstalling the new ones, and have included the process here for reference.

Some of the steps below did not help, but I have included them and their results in the documentation of what has been tried. I have previously done mongodump

all databases, so I had a backup.

The end result is that everything currently works as "working" apart from restoring the database admin

.

01. Turn offmongod

mongo
use admin
db.shutdownServer()

      

        
        
        
      

    

from: http://docs.mongodb.org/manual/tutorial/manage-mongodb-processes/

02. Removed the "pinned package" state mongodb-10gen

with

echo "mongodb-10gen install" | sudo dpkg --set-selections

      

        
        
        
      

    

from: https://help.ubuntu.com/community/PinningHowto

03. Then I tried to install the latter mongo

with

sudo apt-get install -y mongodb-org-shell

      

        
        
        
      

    

from: http://docs.mongodb.org/manual/tutorial/install-mongodb-on-ubuntu/

04. The shell version has been updated:

mongo --version
MongoDB shell version: 2.6.6

      

        
        
        
      

    

05. But then I could not connect with mongo

:

mongo
connecting to: test
2015-01-04T00:08:50.482+1000 warning: Failed to connect to 127.0.0.1:27017, reason: errno:111 Connection refused
2015-01-04T00:08:50.483+1000 Error: couldn't connect to server 127.0.0.1:27017 (127.0.0.1), connection attempt failed at src/mongo/shell/mongo.js:146
exception: connect failed

      

        
        
        
      

    

or mongod

:

mongod
The program 'mongod' is currently not installed. You can install it by typing:
sudo apt-get install mongodb-server

      

        
        
        
      

    

06. I ran the following to view the apt-get install / uninstall history:

less /var/log/apt/history.log

      

        
        
        
      

    

and received:

Start-Date: 2015-01-04  00:02:08
Commandline: apt-get install -y mongodb-org-shell
Install: mongodb-org-shell:amd64 (2.6.6)
Remove: mongodb-10gen:amd64 (2.4.9)
End-Date: 2015-01-04  00:02:21

      

        
        
        
      

    

07. I ran:

dpkg --get-selections

      

        
        
        
      

    

and saw:

mongodb-10gen deinstall

      

        
        
        
      

    

I think "deinstall" means it is marked for removal.

08. I decided to remove all packages mongodb-10gen

with

sudo apt-get purge mongodb-10gen

Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  gir1.2-clutter-gst-2.0 gir1.2-ges-1.0 gstreamer1.0-gnonlin libav-tools
  libavdevice53 libavfilter3 libavresample1 libges-1.0-0 libgoocanvas-common
  libgoocanvas3 libmlt++3 libmlt-data libmlt6 libqjson0 libquicktime2
  libsoprano4 melt python-dateutil python-gst-1.0 python-matplotlib
  python-matplotlib-data python-mlt python-pygoocanvas python-pyparsing
  python-tz python3-bs4 python3-markdown shared-desktop-ontologies
  soprano-daemon wkhtmltopdf
Use 'apt-get autoremove' to remove them.
The following packages will be REMOVED:
  mongodb-10gen*
0 to upgrade, 0 to newly install, 1 to remove and 3 not to upgrade.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] 

Y

(Reading database ... 246460 files and directories currently installed.)
Removing mongodb-10gen (2.4.9) ...
Purging configuration files for mongodb-10gen (2.4.9) ...
dpkg: warning: while removing mongodb-10gen, directory '/var/lib/mongodb' not empty so not removed

      

        
        
        
      

    

from: https://askubuntu.com/a/147177

09. I made a backup copy of a directory that could not be deleted, i.e. /var/lib/mongodb

:

sudo cp -avr /var/lib/mongodb/ /home/

      

        
        
        
      

    

10. And then delete it.

cd /var/lib/
sudo rm -rf mongodb/

      

        
        
        
      

    

11. I was looking for packages left mongodb-10gen

:

dpkg --get-selections | grep "mongodb-10gen"

      

        
        
        
      

    

which didn't return anything.

12. I installed mongodb-org

in version 2.6.6 via Synaptic Package Manager.

13. I checked that all mongodb packages were in the same version:

mongodump --version
mongorestore --version
mongo --version
mongod --version
mongos --version
# all returned 2.6.6

      

        
        
        
      

    

14. Then I did a mongorestore

with every dump dump, for example:

mongorestore --db dname_01 /path/to/dump/dbname_01/
mongorestore --db dname_02 /path/to/dump/dbname_02/

      

        
        
        
      

    

It seems to work with all databases, but the database fails admin

:

assertion: 17415 Cannot restore users with schema version 1 to a system with server version 2.5.4 or greater

      

        
        
        
      

    

And users

some anomalies were found in the database , for example:

Restoring to users.pending_registrations without dropping. Restored data will be inserted without raising errors; check your server log
Restoring to users.roles without dropping. Restored data will be inserted without raising errors; check your server log
Restoring to users.users without dropping. Restored data will be inserted without raising errors; check your server log

      

        
        
        
      

    

15. I ran db.upgradeCheckAllDBs()

:

mongo
use admin

db.upgradeCheckAllDBs()

Checking database local
Checking collection local.startup_log
Checking collection local.system.indexes
Checking database dname_01
...
Checking database admin
Everything is ready for the upgrade!
true

      

        
        
        
      

    

from: http://docs.mongodb.org/manual/release-notes/2.6-upgrade/#preparedness