Version v3.4 of the documentation is no longer actively maintained. The page that you are viewing is the last archived version. For the latest stable documentation, see v3.5.
etcd uses the capnslog library for logging application output categorized into levels. A log message’s level is determined according to these conventions:
Error: Data has been lost, a request has failed for a bad reason, or a required resource has been lost
Warning: (Hopefully) Temporary conditions that may cause errors, but may work fine. A replica disappearing (that may reconnect) is a warning.
Notice: Normal, but important (uncommon) log information.
Info: Normal, working log information, everything is fine, but helpful notices for auditing or common operations.
Debug: Everything is still fine, but even common operations may be logged, and less helpful but more quantity of notices.
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