use FQDN which makes sure things conform to RFC 1035, as k8s spec says it should

Cargo.lock

@@ -1172,6 +1172,16 @@ dependencies = [
  "percent-encoding",
 ]
 
+[[package]]
+name = "fqdn"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c0f5d7f7b3eed2f771fc7f6fcb651f9560d7b0c483d75876082acb4649d266b3"
+dependencies = [
+ "punycode",
+ "serde",
+]
+
 [[package]]
 name = "funty"
 version = "2.0.0"
@@ -1397,6 +1407,7 @@ dependencies = [
  "directories",
  "dockerfile_builder",
  "env_logger",
+ "fqdn",
  "harmony_macros",
  "harmony_types",
  "helm-wrapper-rs",
@@ -3016,6 +3027,12 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "punycode"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e9e1dcb320d6839f6edb64f7a4a59d39b30480d4d1765b56873f7c858538a5fe"
+
 [[package]]
 name = "quote"
 version = "1.0.40"

harmony/Cargo.toml

@@ -39,3 +39,11 @@ lazy_static = "1.5.0"
 dockerfile_builder = "0.1.5"
 temp-file = "0.1.9"
 convert_case.workspace = true
+fqdn = { version = "0.4.6", features = [
+    "domain-label-cannot-start-or-end-with-hyphen",
+    "domain-label-length-limited-to-63",
+    "domain-name-without-special-chars",
+    "domain-name-length-limited-to-255",
+    "punycode",
+    "serde",
+] }

harmony/src/modules/k8s/ingress.rs

@@ -12,10 +12,10 @@ use super::resource::{K8sResourceInterpret, K8sResourceScore};
 
 #[derive(Debug, Clone, Serialize)]
 pub struct K8sIngressScore {
-    pub name: String,
-    pub host: String,
-    pub backend_service: String,
-    pub port: String,
+    pub name: fqdn::FQDN,
+    pub host: fqdn::FQDN,
+    pub backend_service: fqdn::FQDN,
+    pub port: u16,
     pub path: Option<String>,
     pub path_type: Option<String>,
     pub namespace: Option<String>,
@@ -67,6 +67,6 @@ impl<T: Topology + K8sclient> Score<T> for K8sIngressScore {
     }
 
     fn name(&self) -> String {
-        "K8sIngressScore".to_string()
+        format!("{} K8sIngressScore", self.name)
     }
 }

harmony/src/modules/lamp.rs

@@ -1,6 +1,7 @@
 use convert_case::{Case, Casing};
 use dockerfile_builder::instruction::{CMD, COPY, ENV, EXPOSE, FROM, RUN, WORKDIR};
 use dockerfile_builder::{Dockerfile, instruction_builder::EnvBuilder};
+use fqdn::fqdn;
 use non_blank_string_rs::NonBlankString;
 use serde_json::json;
 use std::collections::HashMap;
@@ -134,10 +135,10 @@ impl<T: Topology + K8sclient + HelmCommand> Interpret<T> for LAMPInterpret {
         info!("LAMP deployment_score {deployment_score:?}");
 
         let lamp_ingress = K8sIngressScore {
-            name: "lamp-ingress".to_string(),
-            host: "test".to_string(),
-            backend_service: "test".to_string(),
-            port: "8080".to_string(),
+            name: fqdn!("lamp-ingress"),
+            host: fqdn!("test"),
+            backend_service: fqdn!("test"),
+            port: 8080,
             path: None,
             path_type: None,
             namespace: self.get_namespace().map(|nbs| nbs.to_string()),