Fake S3 is a gem designed to run a small server on
localhost that will correctly handle AWS/S3 GETs and PUTs (among others) while using the local filesystem as the storage backend. This has a number of benefits for anyone working on an application with AWS integration.
Probably the biggest benefit is offline development. There’s also a lower configuration burden as there’s no longer special bucket names or keys the manage, the development environment just expects
localhost to work. Finally, there’s a very real cost savings. Originally, we paid for two buckets per developer just to support the sample data for dev and test. Now we need none.
$ gem install fakes3
$ fakes3 -r /mnt/s3 -p 4567
Assuming you’ve got some rake tasks which load up S3 with sample data, just go ahead and run them, you’ll find files created directly under
/mnt/s3/development and the requests your local instance makes will just return that data.
All with no cloud-access needed.
In case you didn’t notice, the
fakes3 command is a bit verbose, which may be OK, but if you’re like me and just want to run this as a background service, the following (naive) init script should do the job:
#!/bin/bash if [[ ! -d /mnt/s3 ]]; then mkdir /mnt/s3 || return 1 chown -R vagrant:vagrant /mnt/s3 # make it user-writable fi case $1 in start) fakes3 -r /mnt/s3 -p 4567 &>/dev/null & echo $! > /var/run/fakes3.pid ;; stop) kill -9 `cat /var/run/fakes3.pid` ;; restart) $0 stop sleep 3 $0 start ;; esac