Deploy the Synapse charm for the first time

What you’ll do

• Deploy the Synapse charm.
• Integrate with the PostgreSQL K8s charm.
• Expose the Synapse charm by using Traefik K8s charm.
• Create a user.
• Access your Synapse instance via Element Desktop.

Through the process, you’ll verify the workload state, and log in to your Synapse instance via Element Desktop application.

Requirements

• Juju 3 installed.
• Juju controller created.

For more information about how to install Juju, see Get started with Juju.

Set up a Tutorial Model

To manage resources effectively and to separate this tutorial’s workload from your usual work, create a new model using the following command.

juju add-model synapse-tutorial

Deploy the Synapse charm

Synapse requires connections to PostgreSQL. Deploy both charm applications.

Deploy and integrate the charms

juju deploy postgresql-k8s --trust
juju deploy synapse

Run juju status to see the current status of the deployment. Synapse unit should be in waiting status.

Set the server name by running the following command:

juju config synapse server_name=tutorial-synapse.juju.local

Run juju status again to see that the message has changed:

synapse/0*                 waiting   idle   10.1.74.70             Waiting for database availability

Provide the integration between Synapse and PostgreSQL:

juju integrate synapse postgresql-k8s

Run juju status and wait until the Application status is Active as the following example:

App                       Version                       Status  Scale  Charm                     Channel  Rev  Address         Exposed  Message
synapse                 3.2                           active      1  synapse                              17  10.152.183.68   no

The deployment is complete when the status is Active.

Integrate with Traefik

The Traefik charm exposes Juju applications to the outside of a Kubernetes cluster, without relying on the ingress resource of Kubernetes.

If you want to make Synapse charm available to external clients, you need to deploy the Traefik charm and integrate Synapse with it.

Deploy the Traefik charm

juju deploy traefik-k8s --trust

Configure external_hostname as the same set for Synapse and the routing_mode:

juju config traefik-k8s external_hostname=juju.local
juju config traefik-k8s routing_mode=subdomain

Provide integration between Synapse and Traefik:

juju integrate synapse traefik-k8s

Now, you will need to go into your DNS settings and set the IP address of the Traefik charm to the DNS entry you’re setting up. Getting the IP address can be done using juju status.

App                       Version                       Status  Scale  Charm                     Channel  Rev  Address         Exposed  Message
traefik-k8s      2.9.6                 active       1  traefik-k8s      stable     110  10.152.183.225  no

You can configure the resolution of “tutorial-synapse.juju.local” by adding an “A” record with the IP address “10.152.183.225” to the appropriate zone in your DNS server’s configuration. Save the changes and ensure that DNS caches are flushed or DNS services are restarted if necessary. This will allow clients querying your DNS server to resolve “tutorial-synapse.juju.local” to the specified IP address. Note that it might take a few minutes for the DNS changes to take effect.

In case you don’t have access to a DNS: The browser uses entries in the /etc/hosts file to override what is returned by a DNS server. So, to resolve it to your Traefik IP, open the /etc/hosts file and add the following line accordingly:

10.152.183.225 tutorial-synapse.juju.local

Optional: run echo "10.152.183.225 tutorial-synapse.juju.local" >> /etc/hosts to redirect the output of the command echo to the end of the file /etc/hosts.

After that, visit http://tutorial-synapse.juju.local in a browser and you’ll be presented with a screen with the following text: “It works! Synapse is running”.

Create a user

Create a user by running the following command:

juju run-action synapse/0 register-user username=alice password=<secure-password> admin=no

Access via Element Desktop

Follow the instructions to install Element Desktop.

Open it and click on “Sign in”. Then click on “Edit” to provide which server you want to use (tutorial-synapse.juju.local).

Now, you can fill in the username and password fields accordingly to the action output. Then you should see a welcome page and it’s ready to chat.

Clean up the Environment

Well done! You’ve successfully completed the Synapse tutorial. To remove the model environment you created during this tutorial, use the following command.

juju destroy-model synapse-tutorial