Using the web dashboard

Now we’re going to take you step by step on the process of creating a Linux instance on the Catalyst Cloud.

Before you begin

  1. We assume you’ve already signed up to the Catalyst Cloud.
  2. Log in to the dashboard at
  3. As a new user to the Catalyst Cloud your initial cloud project will come with a pre-configured private network and a router connected to the internet. We assume this is the case for this tutorial. If you have deleted this, or would like to create additional networks then please see creating networks for details on how to do that.

Otherwise, let’s proceed with building your first instance.

Uploading an SSH key

The first thing we need to do is to have a way to access the instances we create. Typcially this is done by a Secure Shell tunnel, or SSH. To allow our instance to accept our workstation’s SSH tunnel request, we must add our SSH public key to our instance. We can do this right from the dashboard.

You can either import an existing public key or have the Catalyst Cloud create a key pair for you. We document both below.

Creating a new key pair

If you haven’t generated a SSH key pair before, Catalyst Cloud can create one for you.

Navigate to the Key Pairs tab.


Select the Create Key Pair button.


Name and create the key pair.


Click Copy Private Key to Clipboard and paste it into a text file in a secure location. Make sure the file is saved as plain text.

Importing an existing key pair

If you already have an SSH key pair, you can import the public key into Catalyst Cloud.

Navigate to the Key Pairs tab.


Select the Import Key Pair button.


Name the key pair, and paste your public key into the box.


Now that you’ve either imported or created an SSH key pair, we can continue.

Configure Instance Security Group

By default, instances are inaccessible from all external IP addresses on all ports. So we’ll need to create an extra security group to let us SSH into the instance we’re about to create.

Navigate to the Security Groups tab.


Now we’ll create a new security group, specific to allowing SSH access. Select Create Security Group , give it a name, and create it.


Now select manage rules for your new security group.


As you can tell, by default security rules allow egress of all traffic, and allow no ingress of traffic. By adding additional rules, we can whitelist new types of traffic, coming from new IP addresses. Note that you can assign more than one security group to an instance.

Select add rule.


Here we can see the add rule screen. Many options are available to us.


Change the Rule dropdown to SSH. If you’d like to restrict SSH requests to just your IP address, you could change the CIDR option to your IP address. Here however, I’ve left it as, to allow SSH access from all IP addresses. Obviously, this would be an insecure thing to do when working in a real production environment, but I’m leaving it like this for convenience.

When you’re happy, select Add to add the rule to the security group.


We now have a security group that will allow SSH access to our soon to be created instance.

Booting an Instance

We are now ready to launch our first instance! Navigate to the Instances page.


Select launch instance.


Name your instance.


Navigate to the Source tab.

There are many types of sources you can use for your instance. In this case, we’ll use an Image to create a standard Ubuntu installation.


Search for Ubuntu.

Select the image for Ubuntu 18.

By default the volume will just be large enough to hold the image’s files. We’ll increase it to 100GB so we have enough space for later.


Navigate to the Flavor tab. This is where we select the compute resources we want to assign to our compute instance.

Order the flavors by VCPUS, and select an appropriate size.


Navigate to the Security Groups tab. Add your new security group.


Navigate to the Key Pair tab. Your key pair should already be assigned, but if it’s not, do it now. This will inject your public key into the new instance, so that your private key will be accepted for SSH connections.


All the other tabs are for advanced features, and we can safely ignore them for now.

Select Launch Instance.

Wait for your instance to launch.


Finally, to make your instance accessable, we need to give it a publicly available, static IP address, because currently the instance only has an internal IP address from instance’s subnet. These are Floating IPs.

Use the instance’s dropdown to find the Associate Floating IP option and select it.


Select the + to create a new floating IP address.


Select Allocate IP to provision yourself a floating IP address.


The new floating IP should already be assigned.

Select Associate to associate it to your instance.

The floating IP is a way to access your new instance.


Congratulations, you’ve now booted an instance. Now we’ll connect to it with an SSH tunnel so you can start using it.

Connect to the new Instance

Before we SSH in, we should give the private SSH key the correct, more secure permissions.

$ chmod 600 <path to private key>

You can now connect to the SSH service using the floating IP that you associated with your instance. This address is visible in the Instances list, or under the Floating IPs window.

$ ssh -i <path to private key> ubuntu@<your floating ip>

You should be able to SSH into, and interact with this instance as you would any Ubuntu server.

Learning more from here

Now you’ve learned a great deal about Catalyst Cloud instances, security groups, floating ips, SSH key pairs, and images. To move forward from here, you might want to: