MongoDB

How to install MongoDB 4.0

	Note:
	All info is based on SME Server 9 only but I have just started to test on v10 - see notes below

Install Official Repository

This should work for every version of Koozali SME

You may need to change the mongodb version as required

db yum_repositories set mongodb repository \
               BaseURL https://repo.mongodb.org/yum/redhat/\$releasever/mongodb-org/4.0/$basearch/ \
               EnableGroups no \
               GPGCheck yes \
               Name "MongoDB" \
               GPGKkey https://www.mongodb.org/static/pgp/server-4.0.asc \
               Visible no \
               status disabled

signal-event yum-modify

yum install mongodb-org --enablerepo=mongodb

If refuses to install because of no GPG Key you can change GPGCheck above from Yes to No and try yum install... again or

rpm --import https://www.mongodb.org/static/pgp/server-4.0.asc

Or

yum install mongodb-org --enablerepo=mongodb --nogpgcheck

Start Mongo

	Warning:
	Please check additional notes below before trying this section

	Note:
	If you start mongo like this you will run mongo as root. When mongo later tries to start automatically it may fail because it will be started as the mongod user and won't be able to access the DB files.

/etc/init.d/mongod start

Add the symlinks to start automatically:

ln -s /etc/init.d/mongod /etc/rc.d/rc6.d/K03mongodb
ln -s /etc/init.d/mongod /etc/rc.d/rc7.d/S57mongodb

Optional: create symlink to use mongo or mongodb as service name

ln /etc/init.d/mongod /etc/init.d/mongodb

To ensure everything is all right:

signal-event post-upgrade
signal-event reboot

Additional Notes

Note - I need to test this again This is my initial observation.

As far as I can see, the link above to mongodb is not necessary.

It may need this to set on and off correctly in other service levels:

chkconfig mongod on

Create a service link in in rc7.d:

ln -s /etc/init.d/mongod /etc/rc.d/rc7.d/S57mongod

To use e-smith-service it will need a key:

config set mongod service status enabled

You should now be able to do:

service mongod start|stop|restart etc

Mongo should come up on boot.

Koozali SME v10

	Warning:
	Complete work in progress - here be Dragons!

Install

Use the above method to add the repo and then:

yum --enablerepo=mongodb install mongodb-org

Mongo will automatically create a symlink so currently there is no way to enable/disable it apart from manually. Once Koozali SME has some more systemd tools we can use DB keys etc.

Created symlink from /etc/systemd/system/multi-user.target.wants/mongod.service to /usr/lib/systemd/system/mongod.service

To enable/disable this just use:

systemctl {en|dis}able mongodb

And to start stop

systemctl {start|stop|restart} mongodb

Vaporise or reinitialise the database

	Warning:
	This will totally and utterly vaporise your data. Got a backup?? You have been warned

Remove the directory contents:

rm -rf /var/lib/mongo/*

Or remove the entire directory and recreate it with the correct ownership:

rm -rf /var/lib/mongo
mkdir -p /var/lib/mongo
chown -R mongod:mongod /var/lib/mongo

If you have a replicaset set in /etc/mongod.conf make sure you initiate it:

mongo --eval "printjson(rs.initiate())"

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