Get the logstash logs of a running logstash container.

[neddogg]

Hi Everyone,

After running an image of logstash, I wanted to monitor its logs but don't know where to find that. This is what I did I connected into the running container with the command,

docker exec -i -t containerId /bin/bash

I went to the folder /var/log/logstash but that folder was empty. I whethering how I can get the logs of the running container.

Any clue please?
Thanks.

[panmichal]

Logstash sends logs to stdout by default so you can use

docker logs -f containerId

[jalberto]

@panmichal the current docker image (5) is configured to log to file not to stdout.

Is this intentional or a bug?

[tianon]

@jalberto that sounds like a bug --

logstash/5.0/Dockerfile

Lines 40 to 48 in 0f53eec

	# necessary for 5.0+ (overriden via "--path.settings", ignored by < 5.0)
	ENV LS_SETTINGS_DIR /etc/logstash
	# comment out some troublesome configuration parameters
	# path.log: logs should go to stdout
	# path.config: No config files found: /etc/logstash/conf.d/*
	RUN set -ex \
	&& if [ -f "$LS_SETTINGS_DIR/logstash.yml" ]; then \
	sed -ri 's!^(path.log|path.config):!#&!g' "$LS_SETTINGS_DIR/logstash.yml"; \
	fi

😞

[tianon]

Looks like the value got renamed:

path.logs: /var/log/logstash

[tianon]

#67 👍

[jalberto]

@tianon great! any idea when it will be merged?

[mi-hol]

@neddogg @tianon looks like this could be closed, right?

[tianon]

Indeed, thanks @mi-hol!

[sandeep1-0]

Is it possible to get the logs of logstash container through mentioning path inside the yml file.