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13.5.4. Logging Environment Variables
With the release of OpenShift Enterprise 2.1, logging environment variables are available to configure the behavior of logs generated by an application. When logs are written to the
OPENSHIFT_LOG_DIR directory of an application, log files are rolled if their file size exceeds a configurable threshold. A configurable number of rolled files are retained before the oldest file is removed prior to the next roll.
| Environment Variable Name | Purpose |
|---|---|
LOGSHIFTER_OUTPUT_TYPE | If permitted by your system administrator, overrides the default logging behavior. Set file to have logs written to the OPENSHIFT_LOG_DIR directory of the application, or set syslog to enable Syslog logging, if available. Starting in OpenShift Enterprise 2.1.7, set multi to enable both file and syslog at the same time. |
LOGSHIFTER_Cart_Name_MAX_FILESIZE | A case-insensitive string representing the maximum log file size that triggers a roll event. The default value is 10M. If a zero size is specified regardless of the unit, log rolling is effectively disabled. |
LOGSHIFTER_Cart_Name_MAX_FILES | An integer representing the maximum number of log files to retain. The default is 10. |
Cart_Name is a replaceable term used to represent the cartridge short-name. The LOGSHIFTER_Cart_Name_MAX_FILESIZE variable accepts strings in kilobytes, megabytes, gigabytes, and terabytes. For example, for an application with a PHP cartridge, any of the following values would be valid:
- LOGSHIFTER_PHP_MAX_FILESIZE=500K
- LOGSHIFTER_PHP_MAX_FILESIZE=10M
- LOGSHIFTER_PHP_MAX_FILESIZE=2G
- LOGSHIFTER_PHP_MAX_FILESIZE=1T
