CODEWITHSUNDEEP
node.jsamazon-web-servicesamazon-ec2production-environment
Sachin Shah
Sachin Shah

Reputation: 4533

Update code on production env where we have live users all time

Our app is in prod mode now.

How can I update the server code?

Issue: It might have a chance that someone is accessing a server or doing some CRUD. It may impact the data and we have some payment-related things as well.

Upvotes: 0

Views: 60

Answers (1)

AKX
AKX

Reputation: 169338

A reasonably easy and straight-forward way is a blue-green deployment. (Unlike what the Wikipedia article says, the instances don't need to be physical servers, just app instance listening on multiple ports on the same server, for instance. )

Assuming you'd be upgrading from version 1 to version 2:

  • Your frontend load balancer (e.g. ELB) directs traffic to version 1.
  • You deploy version 2.
  • You configure ELB to start directing traffic to version 2 and stop directing to version 1.
  • Once there is no traffic to version 1, you shut it down.

Extra care must of course be taken if version 2 involves e.g. database schema changes that aren't compatible with version 1.

Upvotes: 2

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