Login from Docker

I have a rails app running through docker. I am bringing up an application using docker-compose (below). The whole application includes mysql, redis, rails (including 3rd party workers), nginx (with frontend support) and an rsyslog server that translates all logs to Loggly

My problem is solved for the logging part. Logs from all services are mostly sent except from my logs from sidekiq. When I start sidekiq with bundler exec sidekiq

, the logs are output to the console (stdout), but I can't see them when I find the tail of / var / log / messages on the rsyslog server.

I followed this tutorial while setting up registration in docker:

https://medium.com/@yoanis_gil/logging-with-docker-part-1-b23ef1443aac

My thinking is that whatever goes to stdout in the docker container should be written to the docker log engine, and with my setup this means it should go to the syslog server ...

Docker file:

version: '3'

services:
  nginx:
    image: nginx
    depends_on:
      - api
      - syslog
    ports:
      - "80:8080"

    logging:
      driver: syslog
      options:
        syslog-facility: "daemon"
        tag: "nginx"
        syslog-address: "tcp://localhost:5514"
    networks:
      - phototankswarm
    env_file: .env.dev
    volumes:
      - ./frontend/nginx/conf.d:/etc/nginx/conf.d
      - ./frontend/public:/www

  db:
    image: mysql
    env_file: .env.dev
    depends_on:
      - syslog
    networks:
      - phototankswarm
    ports:
      - "3306:3306"
    volumes:
      - ./backend/sql/data:/var/lib/mysql
    logging:
      driver: syslog
      options:
        syslog-facility: "daemon"
        tag: "mysql"
        syslog-address: "tcp://localhost:5514"

  redis:
    image: redis
    depends_on:
      - syslog
    networks:
      - phototankswarm
    logging:
      driver: syslog
      options:
        syslog-facility: "daemon"
        tag: "redis"
        syslog-address: "tcp://localhost:5514"

  api:
    image: pt-rails
    env_file: .env.dev
    networks:
      - phototankswarm
    command: >
      sh -c '
      rails s -p 3000 -b 0.0.0.0;
      '
    volumes:
      - /Users/martinhinge/Pictures/docker/phototank:/media/phototank
      - ./backend:/usr/src/app
    ports:
      - "3000:3000"
    depends_on:
      - db
      - redis
      - syslog
    logging:
      driver: syslog
      options:
        syslog-facility: "daemon"
        tag: "rails"
        syslog-address: "tcp://localhost:5514"

  syslog:
    image: syslog
    ports:
      - "localhost:5514:514"
    networks:
      - phototankswarm
    volumes:
      - /tmp:/var/log/syslog

networks:
  phototankswarm: