About the Author
Mike Ryan, Syadmin at Fashiolista, author of …
Thierry Schellenbach, Founder/ CTO at Fashiolista
Command line usage
start by validating if we can access boto and instance metadata
snaptastic test
roundtrip flow
snaptastic mount-snapshots solr
touch /mnt/test/helloworld.txt
snaptastic make-snapshots solr
snaptastic unmount-snapshots solr
df to verify its gone
snaptastic mount-snapshots solr
Example Settings File
REGION = ‘eu-west-1’
AWS_ACCESS_KEY_ID = ‘ExampleKey’
AWS_SECRET_ACCESS_KEY = ‘ExampleSecret’
#create snapshotters
from snaptastic import Snapshotter, EBSVolume
- class SOLRSnapshotter(Snapshotter):
- def get_volumes(self):
volume = EBSVolume(‘/dev/sdf1’, ‘/mnt/index’, size=200)
volumes = [volume]
return volumes
For more examples see examples.py
Snaptastic searches for its setting file at:
* snaptastic_settings on sys.path
* /etc/snaptastic_settings.py
* /etc/snaptastic/snaptastic_settings.py
Features
Graceful failure handling
Freezes for the absolute minimal required duration
Batches boto API calls for faster batch volume mounting/snapshotting
Tested codebase
Porting old systems
You will often need to fake userdata for porting old systems.
Doing so is quite easy:
sudo snaptastic make-snapshots solr –userdata=’{“role”: “solr”, “cluster”: “solr”, “environment”: “aws”}’
Todo
Prevent you from freezing the root filesystem
Auto terminate volumes after instance termination
Error testing against boto and real file system
Pypi
Workflow
fab validate (checks pep8 and unittests)
fab publish (if tests are ok, publishes the new version, tag, pypi)
fab clean (attempt to auto cleanup pep8 mistakes)
Running tests
