Knowledgebase

Symptoms

On Amazon Web Services, the system hostname is changed upon a reboot of the server. This can cause license errors.

Procedure

On AWS servers, you must utilize the Cloud Config system. The configuration files are located in:

/etc/cloud/cloud.cfg.d/

In some cases, there may already be a 99_hostname.cfg file in place which is setting the hostname. You can verify if the file exists by listing the directory contents.

ls -lah /etc/cloud/cloud.cfg.d/

If the file does not exist, it must be created.

touch /etc/cloud/cloud.cfg.d/99_hostname.cfg

Then, the file must be edited.

nano /etc/cloud/cloud.cfg.d/99_hostname.cfg

You will want to modify the "hostname" and "fqdn" configurations:

#cloud-config
hostname: server
fqdn: server.domain.tld

Note: You will want to replace "server.domain.tld" with the full hostname of your server and "server" with just the last segment of that hostname in the above example.