We have multiple VPC’s that connect to another shared VPC via peering.
E.g. our Dev and QA VPCs share the DB VPC
We need to create a security group rule where we specify the cidr_blocks of the private subnets for each VPC(dev, qa).
We could use data sources to retrieve this information but would be repeating this for each VPC e.g.
data aws_vpc dev {
filter {
name = “name”
values = [“dev”]
}
}
data aws_subnet_ids dev {
vpc_id = aws_vpc.dev.vpc_id
tags = {
Tier = “private”
}
}
data aws_subnet dev {
for_each = data.aws_subnet_ids.dev.ids
id = each.value
}
Is there a better way to do this?