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@ssaunier
Last active December 14, 2020 05:23
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Speed up the AWS Elastic Beanstalk of your Rails deployment with bundle/assets caching
# .ebextensions/cache.config
files:
"/opt/elasticbeanstalk/hooks/appdeploy/pre/02a_set_cache.sh":
mode: "000755"
owner: root
group: root
content: |
#!/bin/bash
set -xe
EB_APP_STAGING_DIR=$(/opt/elasticbeanstalk/bin/get-config container -k app_staging_dir)
BUCKET="elasticbeanstalk-PUT_YOUR_REGION-PUT_YOUR_ACCOUNT_ID"
mkdir -p /tmp/cache
if aws s3 ls s3://${BUCKET}/cache/gem.tar.gz ; then
aws s3 cp --quiet s3://${BUCKET}/cache/gem.tar.gz /tmp/cache/gem.tar.gz
fi
if aws s3 ls s3://${BUCKET}/cache/node_modules.tar.gz ; then
aws s3 cp --quiet s3://${BUCKET}/cache/node_modules.tar.gz /tmp/cache/node_modules.tar.gz
fi
if aws s3 ls s3://${BUCKET}/cache/assets.tar.gz ; then
aws s3 cp --quiet s3://${BUCKET}/cache/assets.tar.gz /tmp/cache/assets.tar.gz
fi
[ -f /tmp/cache/gem.tar.gz ] && tar -xf /tmp/cache/gem.tar.gz -C $EB_APP_STAGING_DIR && chown webapp:webapp -R "$EB_APP_STAGING_DIR/vendor/bundle"
[ -f /tmp/cache/node_modules.tar.gz ] && tar -xf /tmp/cache/node_modules.tar.gz -C $EB_APP_STAGING_DIR && chown webapp:webapp -R "$EB_APP_STAGING_DIR/node_modules"
[ -f /tmp/cache/assets.tar.gz ] && tar -xf /tmp/cache/assets.tar.gz -C $EB_APP_STAGING_DIR && chown webapp:webapp -R "$EB_APP_STAGING_DIR/tmp"
exit 0
"/opt/elasticbeanstalk/hooks/appdeploy/pre/11a_build_cache.sh":
mode: "000755"
owner: root
group: root
content: |
#!/bin/bash
set -xe
EB_APP_STAGING_DIR=$(/opt/elasticbeanstalk/bin/get-config container -k app_staging_dir)
cd $EB_APP_STAGING_DIR
mkdir -p /tmp/cache
tar -zcf /tmp/cache/gem.tar.gz vendor/bundle
tar -zcf /tmp/cache/node_modules.tar.gz node_modules
tar -zcf /tmp/cache/assets.tar.gz tmp/cache/assets
BUCKET="elasticbeanstalk-PUT_YOUR_REGION-PUT_YOUR_ACCOUNT_ID"
aws s3 cp /tmp/cache/gem.tar.gz s3://${BUCKET}/cache/gem.tar.gz
aws s3 cp /tmp/cache/node_modules.tar.gz s3://${BUCKET}/cache/node_modules.tar.gz
aws s3 cp /tmp/cache/assets.tar.gz s3://${BUCKET}/cache/assets.tar.gz
@clarkritchie
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Thanks for posting this. If I want to use this with multiple apps all running in the same region, does it stand to reason that modifying the BUCKET would be the right way to support that?

e.g.

BUCKET="elasticbeanstalk-PUT_YOUR_REGION-PUT_YOUR_ACCOUNT_ID-APP_NAME"

Also, I assume I can reference my app's env vars during 02a_set_cache.sh?

Thanks again!

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