CODEWITHSUNDEEP
amazon-web-servicescontinuous-deploymentelastic-load-balancer
JAR.JAR.beans
JAR.JAR.beans

Reputation: 10034

AWS ELB zero downtime deploy

With an ELB setup, there as healthcheck timeout, e.g. take a server out of the LB if it fails X fail checks.

For a real zero down time deployment, I actually want to be able to avoid these extra 4-5 seconds of down time.

Is there a simple way to do that on the ops side, or does this needs to be in the level of the web server itself?

Upvotes: 3

Views: 1456

Answers (1)

Sergey Kovalev
Sergey Kovalev

Reputation: 9411

If you're doing continuous deployment you should deregister the instance you're deploying to from ELB (say, aws elb deregister-instances-from-load-balancer), wait for the current connections to drain, deploy you app and then register an instance with ELB.

http://docs.aws.amazon.com/cli/latest/reference/elb/deregister-instances-from-load-balancer.html http://docs.aws.amazon.com/cli/latest/reference/elb/register-instances-with-load-balancer.html

It is also a common strategy to deploy to another AutoScaling Group, then just switch ASG on the load balancer.

Upvotes: 3

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