Can I add custom log files to the logs captured by elastic beanstalk's 'eb logs' command?

Question

When I request the log files for an elastic beanstalk environment either through the web interface or "eb logs" I get the contents of the log files /var/log/eb-version-deployment.log, /opt/python/log/httpd.out, /var/log/cfn-hup.log, and several others.

Is there a way to add an additional log such as test_output.log to logs collected by the web interface and "eb logs"?

Answer 1

Elastic Beanstalk looks in this folder for configuration files regarding which logs to tail:

/opt/elasticbeanstalk/tasks/taillogs.d/

On my box there are a handful of files there

[ec2-user@ip taillogs.d]$ ls -al
total 32
drwxr-xr-x 2 root root 4096 Sep 27 05:49 .
drwxr-xr-x 6 root root 4096 Sep 27 05:49 ..
-rw-r--r-- 1 root root   58 Sep 27 05:49 eb-activity.conf
-rw-r--r-- 1 root root   35 Sep 27 05:49 eb-version-deployment.conf
-rw-r--r-- 1 root root   16 Oct 15 03:44 httpd.conf
-rw-r--r-- 1 root root   16 Oct 15 03:44 nginx.conf
-rw-r--r-- 1 root root   26 Oct 15 03:44 nodejs.conf
-rw-r--r-- 1 root root   29 Oct 15 03:44 npm.conf

And each one has one line in it, like this:

/var/log/nodejs/nodejs.log

or

/var/log/nginx/*

Use .ebextensions to add a config file to tail your own logs:

files:
  "/opt/elasticbeanstalk/tasks/taillogs.d/my-app-logs.conf":
    mode: "000755"
    owner: root
    group: root
    content: |
      /var/log/my-app.log

More info here:

http://docs.aws.amazon.com/elasticbeanstalk/latest/dg/using-features.logging.html#health-logs-extend