Greylog setup with filebeat and Raw/Plaintext TCP

More : https://docs.graylog.org/en/4.0/pages/installation/docker.html

version: '2'
services:
  mongodb:
    image: mongo:4.2
  elasticsearch:
    image: docker.elastic.co/elasticsearch/elasticsearch-oss:7.10.2
    environment:
      - http.host=0.0.0.0
      - transport.host=localhost
      - network.host=0.0.0.0
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
    ulimits:
      memlock:
        soft: -1
        hard: -1
    mem_limit: 1g
  graylog:
    image: graylog/graylog:4.0
    environment:
      - GRAYLOG_PASSWORD_SECRET=somepasswordpepper
      - GRAYLOG_ROOT_PASSWORD_SHA2=8c6976e5b5410415bde908bd4dee15dfb167a9c873fc4bb8a81f6f2ab448a918
      - GRAYLOG_HTTP_EXTERNAL_URI=http://192.168.0.228:9000/
    entrypoint: /usr/bin/tini -- wait-for-it elasticsearch:9200 --  /docker-entrypoint.sh
    links:
      - mongodb:mongo
      - elasticsearch
    restart: always
    depends_on:
      - mongodb
      - elasticsearch
    ports:
      # Graylog web interface and REST API
      - 9000:9000
      # Syslog TCP
      - 1514:1514
      # Syslog UDP
      - 1514:1514/udp
      # GELF TCP
      - 12201:12201
      # GELF UDP
      - 12201:12201/udp
      - 5555:5555
      - 5551:5551 

Note : 5555 port will be used for filebeat as logstash output

System / inputs >> select input > Beats > launch input > global tick > titile > port = 5555 > threads =2 > Save

• Install filebeat : https://www.elastic.co/guide/en/beats/filebeat/current/filebeat-installation-configuration.html

• Edit /etc/filebeat/filebeat.yml

Output:

Raw/Plaintext TCP

System / inputs >> select input > Raw/Plaintext TCP > launch input > global tick > titile > port = 5551 > threads =2 > Save

for sending Raw/Plaintext TCP

echo "this is log" > /dev/tcp/grelog_server/5551