Logger Metrics

These metrics are emitted by loggers that support metrics.

The discard and journal drivers do not emit metrics. See log for the logging configuration model.

The following tags are present on all logger metrics:

• daemon_group

• stat_id

• logger

  The logger name.

The metrics are:

• logger.message.total

  type: count

  The total number of log messages received by the logger.

• logger.message.pass

  type: count

  The number of log messages successfully sent to the downstream target.

• logger.traffic.pass

  type: count

  The number of log payload bytes successfully sent to the downstream target.

• logger.message.drop

  The number of log messages dropped.

  An extra drop_type tag gives the drop reason. Values are:

  • FormatFailed: the message could not be encoded for the selected log protocol

  • ChannelClosed: the internal async channel was closed

  • ChannelOverflow: the internal async channel was full

  • PeerUnreachable: the downstream peer was closed or unreachable