Random Subnet IP generated Without considering Provided Details

[bangupoc]

Hi,

We have provided a custom CIDR block and Subnet range for our application but when we executed the code its not considering all the subnet details it is randomly providing the Subnet IP Ips during the plan some are from the given list, and some are auto generated.

Initially we identified that we need to use the cidrsubnet terraform function for calculating the subnets and used the terraform console for the given cidr_block

e.g. cidrsubnet("10.90.0.0/16", 5, 0) and we generated the required subnet list,

But while performing the terraform plan. details are random as mentioned.

Can you please let us know whats the issue here ? For some reason the IP ranges which we have provided is not getting considered and random values are been generated.

Sample inputs

inputs = {
vpc_name = "kuber_private_vpc"
cidr_block = "10.90.0.0/16"
num_nat_gateways = 3
num_availability_zones = 3
public_subnet_cidr_blocks = {
"public-application-AZ-0" = "10.90.0.0/21"
"public-application-AZ-1" = "10.90.8.0/21"
"public-application-AZ-2" = "10.90.16.0/21"
}
private_app_subnet_cidr_blocks = {
"private-application-AZ-0" = "10.90.24.0/21"
"private-application-AZ-1" = "10.90.32.0/21"
"private-application-AZ-2" = "10.90.40.0/21"
"private-cache-AZ-0" = "10.90.48.0/21"
"private-cache-AZ-1" = "10.90.56.0/21"
"private-cache-AZ-2" = "10.90.64.0/21"
"private-databse-AZ-0" = "10.90.72.0/21"
"private-databse-AZ-1" = "10.90.80.0/21"
"private-databse-AZ-2" = "10.90.88.0/21"
}
custom_tags = {
"project" = "test"
"application" = "test-application"
"resource-type" = "network"
}
nat_gateway_custom_tags = {
"project" = "test"
"application" = "test-application"
"resource-type" = "network"
}
}

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Tracked in ticket #109792