Requirements

Software

• Access to an installation of OpenStack Horizon, the web-based user interface to OpenStack services.
• GitHub Enterprise QCOW2 image, available from the GitHub Enterprise website.

Hardware

• For your storage device, we recommend a high-performance SSD, either directly attached or from a storage area network (SAN).

Based on your seat count, we recommend this hardware configuration:

Seats	vCPUs	Memory	Attached Storage	Root Storage
10-500	2	16 GB	100 GB	200 GB
500-3000	4	32 GB	250 GB	200 GB
3000-5000	8	64 GB	500 GB	200 GB
5000-8000	12	72 GB	750 GB	200 GB
8000-10000+	16	128 GB	1000 GB	200 GB

These are minimum recommendations. More resources may be required depending on your usage, such as user activity and selected integrations.

Creating a new image in OpenStack Horizon

1. In a browser, log in to your OpenStack Horizon installation.
2. In the left sidebar, under the "Project" menu, click Images.
3. Click Create Image.
4. In the image creation dialog, fill in the required fields:
   • Name
   • Image location
   • Format
5. Click Create Image.

Creating your GitHub Enterprise instance

1. In the left sidebar, click Instances.
2. Click Launch instance.

3. In the instance creation dialog, fill in the required fields:

   • Instance Name - type a suitable, descriptive name.
   • Flavor - select a flavor based on your seat count. For more information, see the hardware requirements.
   • Instance Boot Source - select "Boot from image".
   • Image Name - select the name of the image you uploaded in the previous steps.

   

4. Click Launch.

Creating a security group

If you're setting up your OpenStack KVM for the first time, you will need to create a security group with entries for each port in the following table:

Port	Service	Description
22	SSH	Git over SSH access. Clone, fetch, and push operations to public/private repositories supported.
25	SMTP	SMTP with encryption (STARTTLS) support.
80	HTTP	Web application access. Note that all requests are redirected to the HTTPS port when SSL is enabled.
122	SSH	Instance shell access. Note that the default SSH port (22) is dedicated to application git+ssh network traffic.
161/UDP	SNMP	Required for network monitoring protocol operation.
443	HTTPS	Web application and Git over HTTPS access.
1194/UDP	VPN	Secure replication network tunnel in High Availability configuration.
8080	HTTP	Plain-text web based Management Console. Not required unless SSL is disabled manually
8443	HTTPS	Secure web based Management Console. Required for basic installation and configuration.
9418	Git	Simple Git protocol port. Clone and fetch operations to public repositories only. Unencrypted network communication.

1. In the left sidebar, click Access & Security.
2. In the "Security groups" panel, in the upper right corner, click Create Security Group.
3. In the "Create Security Group" dialog, fill in the fields:
   • Name: A descriptive name for your group. We recommend including "GitHub Enterprise" or "ghe".
   • Description: A brief description of the security group's purpose.
4. Click Create Security Group.

5. To add security rules, in the "Actions" column next to the new security group, click Manage Rules.

6. For each port that needs to be open, you must add a new security group rule. To do so:

   • Click Add Rule
   • In the "Add Rule" dialog, in the "Port" field, enter the port number.
   • Click Add. The rule will be added to the security group editor.

   Add the rest of the rules until you get a security group like this:

7. In the left sidebar, click Instances.

8. In your GitHub Enterprise instance's row, in the "Actions" column, click More, then click Edit Security Groups.

9. To add the new security group to the running instance, in the "Edit Instance" dialog, to the right of the security group name, click the blue plus box.

At this point, all of the required ports should be open. If you can reach the private IP address of your instance, you should be able to navigate to the GitHub Enterprise Management Console at https://<private-ip>/setup.

Adding a storage volume for instance data

1. In the left sidebar, click Volumes.
2. Click + Create Volume.
3. In the volume creation dialog, fill in the required fields:
   • Volume Name - use a descriptive name. We recommend including "GitHub Enterprise" or "ghe".
   • Size (GB) - should be the amount of attached storage you need based on the seat count.
4. Click Create Volume.

5. In the "Volumes" box, next to the newly-created volume, in the "Actions" column, click More, then click Edit Attachments.

6. In the "Manage Volume Attachments" dialog:

   • Under "Attach to Instance", select your GitHub Enterprise instance
   • Click Attach

Associating a floating IP to the instance

1. Depending on your OpenStack setup, you may need to allocate a floating IP to the project and associate it to the instance. Contact your sysadmin to determine if this is the case for you.
2. Configure the GitHub Enterprise appliance.