Filebeats doesn't foward Docker compose logs, why? - elasticsearch

Question

I am following this tutorial to set up a ELK stack (VPS B) that will receive some Docker/docker compose images logs (VPS A) using Beatfile as forwarder, my diagram is as shown below
So far, I have managed to have all the interfaces with green ticks working. However, there are still remaining some issues in that I am not able to understand. Thus, I would appreciate if someone could help me out a bit with it.
My main issue is that I don't get any Docker/docker-compose log from the VPSA into the Filebeat Server of VPSB; nevertheless, I got other logs from VPSA such as rsyslog, authentication log and so on on the Filebeat Server of VPSB. I have configured my docker-compose file to forward the logs using rsyslog as logging driver, and then filebeat is fowarding that syslog to the VPSB. Reaching this point, I do see logs from the docker daemon itself, such as virtual interfaces up/down, staring process and so, but not the "debug" logs of the containters themselves.
The configuration of Filebeat client in VPSA looks like this
root#VPSA:/etc/filebeat# cat filebeat.yml
filebeat:
prospectors:
-
paths:
- /var/log/auth.log
- /var/log/syslog
# - /var/log/*.log
input_type: log
document_type: syslog
registry_file: /var/lib/filebeat/registry
output:
logstash:
hosts: ["ipVPSB:5044"]
bulk_max_size: 2048
tls:
certificate_authorities: ["/etc/pki/tls/certs/logstash-forwarder.crt"]
shipper:
logging:
files:
rotateeverybytes: 10485760 # = 10MB
level: debug
One of the docker-compose logging driver looks like this
redis:
logging:
driver: syslog
options:
syslog-facility: user
Finally I would like to ask, whether it is possible to forward natively from docker-composer the logs to Filebeat client in VPSA, red arrow in the diagram, so that it can forward them to my VPSB.
Thank you very much,
REgards!!

Answer 1

The issue seemed to be in FileBeat VPSA, since it has to collect data from the syslog, it has to be run before that syslog!
Updating rc.d made it work
sudo update-rc.d filebeat defaults 95 10
My filebeats.yml if someone needs it
root#VPSA:/etc/filebeat# cat filebeat.yml
filebeat:
prospectors:
-
paths:
# - /var/log/auth.log
- /var/log/syslog
# - /var/log/*.log
input_type: log
ignore_older: 24h
scan_frequency: 10s
document_type: syslog
registry_file: /var/lib/filebeat/registry
output:
logstash:
hosts: ["ipVPSB:5044"]
bulk_max_size: 2048
tls:
certificate_authorities: ["/etc/pki/tls/certs/logstash-forwarder.crt"]
shipper:
logging:
level: debug
to_files: true
to_syslog: false
files:
path: /var/log/mybeat
name: mybeat.log
keepfiles: 7
rotateeverybytes: 10485760 # = 10MB
Regards