| Code |
Display |
Definition |
emergency |
Emergency |
System is unusable. e.g., This level should only be reported by infrastructure and should not be used by applications. |
alert |
Alert |
Notification should be sent to trigger action be taken. e.g., Loss of the primary network connection needing attention. |
critical |
Critical |
Critical conditions. e.g., A failure in the system's primary application that will reset automatically. |
error |
Error |
Error conditions. e.g., An application has exceeded its file storage limit and attempts to write are failing. |
warning |
Warning |
Warning conditions. May indicate that an error will occur if action is not taken. e.g., A non-root file system has only 2GB remaining. |
notice |
Notice |
Notice messages. Normal but significant condition. Events that are unusual, but not error conditions. |
informational |
Informational |
Normal operational messages that require no action. e.g., An application has started, paused, or ended successfully. |
debug |
Debug |
Debug-level messages. Information useful to developers for debugging the application. |