[Faile!!]Docker, cron, mail and logs

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https://www.preining.info/blog/2018/05/docker-cron-mail-and-logs/

from debian:stretch-slim
RUN apt-get -y update
RUN apt-get install -y cron #ssmtp
ADD . /app
ADD crontab /etc/cron.d/mypackage
RUN chmod 0644 /etc/cron.d/mypackage
#ADD ssmtp.conf /etc/ssmtp/ssmtp.conf
#RUN chown root.mail /etc/ssmtp/ssmtp.conf
#RUN chmod 0640 /etc/ssmtp/ssmtp.conf
CMD cron -f

=====

docker-compose.yml

version: '3.3'

services:
  gethpeers:
    build:
      context: gethpeers/
    volumes:
      - cronlog:/app/cronapplog:rw
    networks:
      - fastdev

  fakelog:
    build:
      context: fakelog/
    volumes:
      - cronlog:/app/cronapplog:rw
      - filebeat:/usr/share/filebeat/data:rw
    networks:
      - fastdev

volumes:  
  cronlog: 
  filebeat:
  
networks:
  fastdev:
    driver: bridge

gethpeers Dockerfile

from debian:stretch-slim
RUN apt-get -y update
RUN apt-get install -y cron 
#ssmtp
ADD . /app
ADD crontab /etc/cron.d/mypackage
RUN chmod 0644 /etc/cron.d/mypackage
#ADD ssmtp.conf /etc/ssmtp/ssmtp.conf
#RUN chown root.mail /etc/ssmtp/ssmtp.conf
#RUN chmod 0640 /etc/ssmtp/ssmtp.conf
CMD cron -f

gethpeers crontab

* * * * * root /app/run-cronjob /app/start.sh

gethpeers run-cronjob

#!/bin/bash

if [ -z "$1" ] ; then
  echo "need name of cron job as first argument" >&2
  exit 1
fi
 
if [ ! -x "$1" ] ; then
  echo "cron job file $1 not executable, exiting" >&2
  exit 1
fi
 
if "$1"
then
  exit 0
else
  echo "cron job $1 failed!" 2>/proc/1/fd/2 >&2
  exit 1
fi

gethpeers start.sh

#!/bin/bash

IP_PORT=xxx.xxx.xxx.xxx:8545
ETH_METHOD=admin_peers
PEERS=$(curl -X POST -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"'$ETH_METHOD'","params":[],"id":1}' $IP_PORT |  jq '.result[].network + {"project":"cronapp"}')

printf "\n===== Now Geth Peers =====\n"
printf "Peers: %s\n" $PEERS
echo $PEERS >> /app/cronapplog/gethpeers.log

fakelog Dockerfile

FROM docker.elastic.co/beats/filebeat:6.5.4
COPY filebeat.yml /usr/share/filebeat/filebeat.yml
USER root
RUN chown root:filebeat /usr/share/filebeat/filebeat.yml
USER filebeat

fakelog filebeat.yml

filebeat.prospectors:

- type: log
  paths:
    - /app/cronapplog/gethpeers.log
  exclude_files: ['.gz$']
  fields:
    srcname: "geth"
    srctype: "cron"
    filebeatserverip: "xxx.xxx.xxx.xxx"
  fields_under_root: true
  symlinks: true

output.logstash:
  hosts: ["logstash:5044"]