What's wrong?

loki.source.syslog drops messages in RFC3164 format that do not include the PRI field, logging it as an error.

The PRI field is not mandatory in RFC3164. These messages should be parsed and the facility and severity level unset or set to default values.

Steps to reproduce

Send a RFC3164 syslog message that does not include the PRI field.

System information

No response

Software version

No response

Configuration

loki.source.syslog "XXX" {
  listener {
    address = "0.0.0.0:1234"
    protocol = "udp"
    syslog_format = "rfc3164"
    label_structured_data = true
    use_rfc5424_message = true
  }
}

Logs