Spigot Resources: https://www.spigotmc.org/resources/spigotloggerforbungee.55531/

This is a BungeeCord plugin that allows you to do logging in BungeeCord, as in Spigot. Logs will be collected in the logs folder:

logs
├── 2018-04-07-1.log.gz
├── 2018-04-07-2.log.gz
├── 2018-04-07-3.log.gz
├── 2018-04-08-1.log.gz
├── 2018-04-08-2.log.gz
├── 2018-04-09-1.log.gz
└── latest.log

Original russian text:

Это BungeeCord плагин, который позволяет сделать логирование в BungeeCord, как в Spigot.
Логи будут собраны в папку logs: