In this tutorial, we will learn on how to store your static files, like JS, CSS, JSON, images, etc. on AWS S3. This is going to make a drastic improvement for your web servers. The reason for improvement is for every page load, there are over tons of follow up such static file requests. Though, such requests are not processed (only then can be kept at S3 as it is a non-processing storage), these request still hit your web servers significantly. When kept on S3, it saves a lot of file power to the web servers. We are going to use Git Hooks, AWS CLI tool to achieve our goal.
The challenge is repeated uploads of your static files to S3, which, if done manual, is tedious. Here we can make use of Git Hooks and AWS CLI tool to work together to automate the syncing of your static files.
Git Hooks, in simple terms, are the intermediate steps behind a git command. For example, git pre-push hook is a hook which executes on every git push command, but prior to pushing the code.
AWS CLI tool in simple terms is a command line interface tool (full form actually) with various commands to communicate with AWS services like S3, EC2, etc.
Here we can write a command for aws using aws cli tool, in the pre-push hook.
The process is that, you can define a constant ASSET_URL for the static files base url location. For ex- for your test environment, it would be http://localhost/project/ and for production it should be your s3 address (or cloudfront url, https://cdn.example.com/, infront of s3). So, the static file urls would look like, ASSETS_URL.'assets/img/a.png', ASSETS_URL.'assets/css/a.css', ASSETS_URL.'assets/js/a.js', etc.
Now the testing and development process would remain same, as all the file copies remain on your local server. But on the production environment, it will look for these files on cdn address provided. So, before sending your code to production servers, you need to update all the new / modified files to the s3.
At this step, git hooks would come into picture. One of the git hook is pre-push hook, which you can edit/create with .git/hooks/pre-push. https://stackoverflow.com/a/14672883/2560576. Example sample for pre-push hook.
In the pre-push hook, you can add aws cli command to update your local assets folder to your s3 assets folder. For example- aws s3 sync assets/ s3://bucket/assets/ --profile aws_credential_profile --acl public-read
So, now when development is complete, and you can execute git push code to push your code to remote repository as usual. But with the help of Git pre-push hook, all the static files will be synced to your s3 bucket’s assets folder just before the actual push.
Now only processing requests are made to your web server, and all static file requests are routed to S3.
Hope this helps someone. Pl give your feedback to improve or add anything.
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