Terraform extracting a list of values from a map of maps

output.tf

 variable "node_private_ips" {
 default = {
   "node1" = {
     "az" = "eu-west-1a"
     "fqdn" = "vadc-ext-pres-node1.ccoe-ch.aws-eu-west-1.dev.fred.plc"
     "ip" = "100.77.254.5"
   }
   "node2" = {
     "az" = "eu-west-1b"
     "fqdn" = "vadc-ext-pres-node2.ccoe-ch.aws-eu-west-1.dev.fred.plc"
     "ip" = "100.77.254.69"
   }
   "node3" = {
     "az" = "eu-west-1c"
     "fqdn" = "vadc-ext-pres-node3.ccoe-ch.aws-eu-west-1.dev.fred.plc"
     "ip" = "100.77.254.133"
   }
 }
 }

 output "maps" {
     value = var.node_private_ips
 }

 output "values" {
     value = values(var.node_private_ips)
 }

 output "ips" {
     value = [for value in values(var.node_private_ips): value["ip"]]
 }