Is there a CLI to tail logs from AWS Elastic Beanstalk
UPDATE: My answer keeps getting upvotes, but things have changed since 2013. It is now easier to tail EB logs—look at posit labs's answer for a simpler way to do it :-).
Original answer:
I had been struggling with this one too. The eb CLI utility does not seem to allow for tailing your application logs currently.
However, you can tail these logs by:
- Creating a key pair in the EC2 console (which should give you a
.pemfile) - Linking your EB instance to this key pair (in the EB console)
- Finding the public DNS of your instance in the EC2 console
- Connecting to your instance via ssh (`ssh -i [yourpemfile.pem] ec2-user@[your.public.dns]
- Tailing your log file. For a Node.js application, that's
tail -f /var/log/nodejs/nodejs.log. I don't know what's the equivalent for a Flask application.
(Thanks to Richard Soutar for pointing me in the right direction on this one.)
2021 Update:
Now the best way to do this might be to use AWS CLI v2:
aws logs tail $log_group_name --follow
(Note: I couldn't get this working for me because of permissions errors.)
My previous answer was:
This is now as simple as:
eb logs --stream
https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/eb3-logs.html
(I realize posit lab's answer already included the --stream option but I keep skimming by that answer because I want to see all the logs, not just one group. And if my memory were better I wouldn't have to keep Googling the same question and ending up at the same place.)
You can use the -g flag to set the log group, then use --stream to stream the results. No need to ssh into a specific machine.
eb logs -g /aws/elasticbeanstalk/yourApp-env/var/log/nodejs/nodejs.log --stream