Nebula Setup Instructions
Nebula is a cloud computing platform for research and development at the University of Arkansas. Learn more about Nebula and how to request access.
Create Access Key
- Click Access & Security. Click the Key Pairs tab and then click the + Create Key Pair button on the right.
- Enter a Key Pair Name.
- Click Create Key Pair. The key pair will download as a .pem file. The key pair will be used to access your instances over SSH.
- Click Instances. Click the Launch Instance button on the right.
- Enter an Instance Name. Click Next.
- Change the "Select Boot Source" option to Image.
- Change the "Delete Volume on Instance Delete" option to Yes.
- Choose an operating system by clicking the plus (+) button on the right. Click Next.
Note: The default disk size is 10GB. This can be increased by changing the Volume Size field.
- Choose a VM Flavor by clicking the plus (+) button on the right.
- Recommend m1.tiny for Ubuntu/Debian instances
- Recommend m1.small for CentOS/RedHat instances
- Click Launch Instance. You will be returned to the Instances list. The status column will show Active when your instance has been set up.
- Click the Associate Floating IP button on the right.
- Select an IP Address and click Associate.
Before accessing an instance for the first time, Mac/Linux users will need to change the permissions of the key pair to read-only. Open Terminal and enter:
chmod 400 yourusername-nebula.pem
For Windows, Install Git and then open Git Bash from the Start menu.
Connect to your instance using SSH in Terminal or Git Bash:
ssh -i yourusername-nebula.pem defaultusername@floatingip
- Replace yourusername-nebula.pem with the key pair filename.
- Replace defaultusername with the appropriate Default Username from the table below.
- Replace floatingip with the IP address associated with the instance.
|Instance OS||Default Username|
By default, instances respond to ICMP, TCP 22, TCP 80, TCP 443 and TCP 8887. Other ports can be added.
For example, to allow port 8080:
- Go to the Access & Security tab. Click Security Groups.
- Click Manage Rules on the right.
- Click + Add Rule.
- Select Custom TCP Rule.
- Enter 8080 in the Port field.
- Click Add.