feat: PostgreSQL score works, added postgresql example, tested on OKD 4.19, added note about incompatible default namespace settings

examples/postgresql/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "example-postgresql"
+edition = "2024"
+version.workspace = true
+readme.workspace = true
+license.workspace = true
+publish = false
+
+[dependencies]
+harmony = { path = "../../harmony" }
+harmony_cli = { path = "../../harmony_cli" }
+harmony_types = { path = "../../harmony_types" }
+cidr = { workspace = true }
+tokio = { workspace = true }
+harmony_macros = { path = "../../harmony_macros" }
+log = { workspace = true }
+env_logger = { workspace = true }
+url = { workspace = true }

examples/postgresql/src/main.rs

@@ -0,0 +1,22 @@
+use harmony::{
+    inventory::Inventory, modules::postgresql::PostgreSQLScore, topology::K8sAnywhereTopology,
+};
+
+#[tokio::main]
+async fn main() {
+    let postgresql = PostgreSQLScore {
+        name: "harmony-postgres-example".to_string(), // Override default name
+        namespace: "harmony-postgres-example".to_string(),
+        ..Default::default() // Use harmony defaults, they are based on CNPG's default values :
+                             // "default" namespace, 1 instance, 1Gi storage
+    };
+
+    harmony_cli::run(
+        Inventory::autoload(),
+        K8sAnywhereTopology::from_env(),
+        vec![Box::new(postgresql)],
+        None,
+    )
+    .await
+    .unwrap();
+}

harmony/src/modules/postgresql/cnpg/crd.rs

@@ -10,6 +10,7 @@ use serde::{Deserialize, Serialize};
     namespaced = true,
     schema = "disabled"
 )]
+#[serde(rename_all = "camelCase")]
 pub struct ClusterSpec {
     pub instances: i32,
     pub image_name: Option<String>,

harmony/src/modules/postgresql/score.rs

@@ -27,6 +27,9 @@ use k8s_openapi::apimachinery::pkg::apis::meta::v1::ObjectMeta;
 /// specific behavior
 #[derive(Debug, Clone, Serialize)]
 pub struct PostgreSQLScore {
+    pub name: String,
+    /// **Note :** on OpenShfit based clusters, the namespace `default` has security
+    /// settings incompatible with the default CNPG behavior.
     pub namespace: String,
     pub instances: i32,
     pub storage_size: String,
@@ -36,7 +39,10 @@ pub struct PostgreSQLScore {
 impl Default for PostgreSQLScore {
     fn default() -> Self {
         Self {
-            namespace: "default".to_string(),
+            name: "harmony-pg".to_string(),
+            // We are using the namespace harmony by default since some clusters (openshift family)
+            // have incompatible configuration of the default namespace with cnpg
+            namespace: "harmony".to_string(),
             instances: 1,
             storage_size: "1Gi".to_string(),
             image_name: None, // This lets cnpg use its default image
@@ -56,7 +62,7 @@ impl PostgreSQLScore {
 impl<T: Topology + K8sclient> Score<T> for PostgreSQLScore {
     fn create_interpret(&self) -> Box<dyn Interpret<T>> {
         let metadata = ObjectMeta {
-            name: Some("postgres".to_string()),
+            name: Some(self.name.clone()),
             namespace: Some(self.namespace.clone()),
             ..ObjectMeta::default()
         };