Charmed MongoDB Tutorials > Deploy a replica set > 7. Enable TLS
Enable TLS in your MongoDB deployment
Transport Layer Security (TLS) is a protocol used to encrypt data exchanged between two applications. Essentially, it secures data transmitted over a network.
Typically, enabling TLS internally within a highly available database or between a highly available database and client/server applications requires a high level of expertise. This has all been encoded into Charmed MongoDB so that configuring TLS requires minimal effort on your end.
TLS is enabled by integrating Charmed MongoDB with the Self Signed Certificates Charm. This charm centralises TLS certificate management consistently and handles operations like providing, requesting, and renewing TLS certificates.
In this section, you will learn how to enable security in your MongoDB deployment using TLS encryption.
Disclaimer: In this tutorial we use self-signed certificates provided by the self-signed-certificates-operator.
This is not recommended for a production environment.
For production environments, check the collection of Charmhub operators that implement the tls-certificate interface, and choose the most suitable for your use-case.
Summary
Configure TLS
First, deploy the self-signed-certificates charm:
juju deploy self-signed-certificates
Wait until the self-signed-certificates app is active with juju status --watch 1s, like in the output below.
Model Controller Cloud/Region Version SLA Timestamp
tutorial overlord localhost/localhost 3.4.0 unsupported 09:35:14+01:00
App Version Status Scale Charm Channel Rev Exposed Message
mongodb active 1 mongodb 6/beta 149 no Primary
self-signed-certificates active 1 self-signed-certificates stable 72 no
Unit Workload Agent Machine Public address Ports Message
mongodb/0* active idle 0 10.67.56.90 27017/tcp Primary
self-signed-certificates/1* active idle 2 10.67.56.137
Machine State Address Inst id Base AZ Message
0 started 10.67.56.90 juju-fab81d-0 ubuntu@22.04 Running
2 started 10.67.56.137 juju-fab81d-2 ubuntu@22.04 Running
Now that self-signed-certificates has finished deploying, we can configure it with:
juju config self-signed-certificates ca-common-name="Tutorial CA"
Enable TLS
To enable TLS on Charmed MongoDB, integrate the two applications:
juju integrate self-signed-certificates mongodb
Connect to MongoDB with TLS
Like before, generate and save the URI that is used to connect to MongoDB:
export URI=mongodb://$DB_USERNAME:$DB_PASSWORD@$HOST_IP/$DB_NAME?replicaSet=$REPL_SET_NAME
echo $URI
Now ssh into mongodb/0:
juju ssh mongodb/0
We are now in the unit that is hosting Charmed MongoDB.
Once TLS has been enabled, we will need to change how we connect to MongoDB. We will need to specify the TLS CA file along with the TLS Certificate file that were automatically created when we integrated the two charms.
You will find these files on the units hosting the Charmed MongoDB application in the folder /var/snap/charmed-mongodb/common/etc/mongod.
If you enter:
ls /var/snap/charmed-mongodb/current/etc/mongod/external*
you should see the following external certificate file and external CA files:
/var/snap/charmed-mongodb/current/etc/mongod/external-ca.crt
/var/snap/charmed-mongodb/current/etc/mongod/external-cert.pem
As before, we will connect to MongoDB via the saved MongoDB URI. Connect using the saved URI and the following TLS options:
sudo charmed-mongodb.mongosh mongodb://$DB_USERNAME:$DB_PASSWORD@$HOST_IP/$DB_NAME?replicaSet=$REPL_SET_NAME --tls --tlsCAFile /var/snap/charmed-mongodb/current/etc/mongod/external-ca.crt --tlsCertificateKeyFile /var/snap/charmed-mongodb/current/etc/mongod/external-cert.pem
You have successfully connected to MongoDB with TLS!
When you are ready, leave the MongoDB shell by typing exit. You will be back in the host of Charmed MongoDB (mongodb/0). Exit this host by typing exit again.
You should now be at the original shell where you can interact with Juju and LXD.
Disable TLS
To disable TLS, remove the integration between the two applications:
juju remove-relation mongodb self-signed-certificates
Next step: 8. Clean up the environment