No logs when running in docker container

[linus-komnick]

Everything works fine when I run $ node server.js. But as soon as I run it with docker, my syslog daemon stops receiving any logs.

This is how I implement it: logger.add(new logger.transports.Syslog()); My guess is that I have to add /dev/log as a volume when running docker, but it doesn't seem to work.

Does anybody know how to fix this?

[linus-komnick]

I was missing a couple of steps to make it work. Here is how I solved it:

1. Uncomment the following in /etc/rsyslog.conf:

   # provides TCP syslog reception
   module(load="imtcp")
   input(type="imtcp" port="514")

2. Restart syslog:

   systemctl restart rsyslog.service

3. Create daemon.json in /etc/docker (if it doesn't already exist) and make sure it contains the following:

   {
   "log-driver": "syslog",
   "log-opts": {
   "syslog-address": "tcp://127.0.0.1:514"
   }
   }

4. Restart docker:

   systemctl restart docker

Now all logs will end up in /var/log/syslog