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. |