Hysteria has the following log levels, which you can control with the
HYSTERIA_LOG_LEVEL environment variable:
You can also use the
HYSTERIA_LOG_FORMAT environment variable to control the log format:
json(time will be displayed as the Unix epoch in milliseconds)
Hysteria also checks for version updates by default and prints log messages if a newer version is available. To disable this, set
HYSTERIA_DISABLE_UPDATE_CHECK to 1.
When using Brutal congestion control (instead of BBR), set
HYSTERIA_BRUTAL_DEBUG to 1 to print information such as current RTT, packet loss, MTU, etc. every 2 seconds.