As discussed in the previous section, OpenStack services write log files to /var/log/<service-name>/*. The OpenStack service operating system packages automatically set up the logrotate program to tar and compress old OpenStack log files, thus avoiding excessive storage consumption. The exception to this default log directory is Keystone and Swift. Keystone utilizes Apache and therefore writes log files to /var/log /apache2/*. Swift writes log files to /var/log/syslog.

Anytime a user makes a request to an OpenStack service's API, a request UUID is generated. You will sometimes see these request IDs when attempting to interact with a service on the Horizon dashboard or CLI. To get more information on service errors, you can easily browse log files for clues regarding the specific request ID.

For example, when attempting to create...