Best practice for successful app deployment

Question

I want to know the best practice to ensure that my web app is deployed without any failures and in case of failure how to rollback? For eg. I have 15 files to be deployed and only 12 get deployed. The failure will cause a lot of chaos. I want to know how to do transactional deployment, status detection and rollback for my web app.

Answer 1

I'd suggest you to write a deployment system that deploys your files one by one. Write a checksum and check to see if the expanded files and the checksum of the compressed files and then use the values in  deployment to check if it deployed successfully.

I did this myself. You need to pass the checksums and and if it is correct in the current step then you move to the next step.