Hello again, I've been wrestling with an Elastic Beanstalk deploy lately and I ran into this issue, what I'm wondering is where I can attach (under what namespace) the subnets is asking for, and, do I need to do two times the namespace or put the subnets on a list?

Creating load balancer failed Reason: At least two subnets in two different Availability Zones must be specified (Service: AmazonElasticLoadBalancing; Status Code: 400; Error Code: ValidationError; Request ID: 7cc7ae7e-17dc-4361-8fec-8b0b0bb5df96; Proxy: null)

Are you creating your own shared load balancer and providing it to the elasticbeanstalk Environment, or using one that elasticbeanstalk creates for you?

aws.elasticbeanstalk.EnvironmentAllSettingArgs(                 namespace="aws:elasticbeanstalk:environment",                  name="LoadBalancerType",
                    value="application)

Only configuring the EB provides

elasticbeanstalk allows you to use a shared load balancer, which makes this very easy and reduces costs, but is initially more difficult to set up.

An array then?, I'll try something and see what comes up, I appreciate your time to help me 🙏

The code in the doc page only uses a string, but an array makes more sense to me. The AWS docs all seem to use the console for everything... 😠

Forgot to answer what happened in this case, for anyone who runs into the same issue: if you're attaching Subnets on the enviroment settings of a EB, it's just

value="subnet-1","subnet-2"