feat: PostgreSQLScore happy path using cnpg operator

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

@@ -0,0 +1,57 @@
+use kube::{api::ObjectMeta, CustomResource};
+use serde::{Deserialize, Serialize};
+
+#[derive(CustomResource, Deserialize, Serialize, Clone, Debug)]
+#[kube(
+    group = "postgresql.cnpg.io",
+    version = "v1",
+    kind = "Cluster",
+    plural = "clusters",
+    namespaced = true,
+    schema = "disabled"
+)]
+pub struct ClusterSpec {
+    pub instances: i32,
+    pub image_name: Option<String>,
+    pub storage: Storage,
+    pub bootstrap: Bootstrap,
+}
+
+impl Default for Cluster {
+    fn default() -> Self {
+        Cluster {
+            metadata: ObjectMeta::default(),
+            spec: ClusterSpec::default(),
+        }
+    }
+}
+
+impl Default for ClusterSpec {
+    fn default() -> Self {
+        Self {
+            instances: 1,
+            image_name: None,
+            storage: Storage::default(),
+            bootstrap: Bootstrap::default(),
+        }
+    }
+}
+
+#[derive(Deserialize, Serialize, Clone, Debug, Default)]
+#[serde(rename_all = "camelCase")]
+pub struct Storage {
+    pub size: String,
+}
+
+#[derive(Deserialize, Serialize, Clone, Debug, Default)]
+#[serde(rename_all = "camelCase")]
+pub struct Bootstrap {
+    pub initdb: Initdb,
+}
+
+#[derive(Deserialize, Serialize, Clone, Debug, Default)]
+#[serde(rename_all = "camelCase")]
+pub struct Initdb {
+    pub database: String,
+    pub owner: String,
+}

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

@@ -0,0 +1,2 @@
+mod crd;
+pub use crd::*;

harmony/src/modules/postgresql/mod.rs

@@ -1,6 +1,9 @@
 pub mod capability;
 mod score;
+pub use score::*;
 
 pub mod failover;
 mod operator;
 pub use operator::*;
+
+pub mod cnpg;

harmony/src/modules/postgresql/score.rs

@@ -1,88 +1,87 @@
-use crate::{
-    domain::{data::Version, interpret::InterpretStatus},
-    interpret::{Interpret, InterpretError, InterpretName, Outcome},
-    inventory::Inventory,
-    modules::postgresql::capability::PostgreSQL,
-    score::Score,
-    topology::Topology,
-};
-
-use super::capability::*;
-
-use harmony_types::id::Id;
-
-use async_trait::async_trait;
-use log::info;
 use serde::Serialize;
 
-#[derive(Clone, Debug, Serialize)]
+use crate::interpret::Interpret;
+use crate::modules::k8s::resource::K8sResourceScore;
+use crate::modules::postgresql::cnpg::{Bootstrap, Cluster, ClusterSpec, Initdb, Storage};
+use crate::score::Score;
+use crate::topology::{K8sclient, Topology};
+use k8s_openapi::apimachinery::pkg::apis::meta::v1::ObjectMeta;
+
+/// Deploys an opinionated, highly available PostgreSQL cluster managed by CNPG.
+///
+/// # Goals
+/// - Production-ready Postgres HA (3 instances), persistent storage, app DB.
+///
+/// # Usage
+/// ```
+/// use harmony::modules::postgresql::PostgreSQLScore;
+/// let score = PostgreSQLScore::new("my-app-ns");
+/// ```
+///
+/// # Limitations (Happy Path)
+/// - Requires CNPG operator installed (use CloudNativePgOperatorScore).
+/// - No backups, monitoring, extensions configured.
+///
+/// TODO : refactor this to declare a clean dependency on cnpg operator. Then cnpg operator will
+/// self-deploy either using operatorhub or helm chart depending on k8s flavor. This is cnpg
+/// specific behavior
+#[derive(Debug, Clone, Serialize)]
 pub struct PostgreSQLScore {
-    config: PostgreSQLConfig,
+    pub namespace: String,
+    pub instances: i32,
+    pub storage_size: String,
+    pub image_name: Option<String>,
 }
 
-#[derive(Debug, Clone)]
-pub struct PostgreSQLInterpret {
-    config: PostgreSQLConfig,
-    version: Version,
-    status: InterpretStatus,
-}
-
-impl PostgreSQLInterpret {
-    pub fn new(config: PostgreSQLConfig) -> Self {
-        let version = Version::from("1.0.0").expect("Version should be valid");
+impl Default for PostgreSQLScore {
+    fn default() -> Self {
         Self {
-            config,
-            version,
-            status: InterpretStatus::QUEUED,
+            namespace: "default".to_string(),
+            instances: 1,
+            storage_size: "1Gi".to_string(),
+            image_name: None, // This lets cnpg use its default image
         }
     }
 }
 
-impl<T: Topology + PostgreSQL> Score<T> for PostgreSQLScore {
-    fn name(&self) -> String {
-        "PostgreSQLScore".to_string()
+impl PostgreSQLScore {
+    pub fn new(namespace: &str) -> Self {
+        Self {
+            namespace: namespace.to_string(),
+            ..Default::default()
+        }
     }
+}
 
+impl<T: Topology + K8sclient> Score<T> for PostgreSQLScore {
     fn create_interpret(&self) -> Box<dyn Interpret<T>> {
-        Box::new(PostgreSQLInterpret::new(self.config.clone()))
-    }
-}
-
-#[async_trait]
-impl<T: Topology + PostgreSQL> Interpret<T> for PostgreSQLInterpret {
-    fn get_name(&self) -> InterpretName {
-        InterpretName::Custom("PostgreSQLInterpret")
-    }
-
-    fn get_version(&self) -> crate::domain::data::Version {
-        self.version.clone()
-    }
-
-    fn get_status(&self) -> InterpretStatus {
-        self.status.clone()
-    }
-
-    fn get_children(&self) -> Vec<Id> {
-        todo!()
-    }
-
-    async fn execute(
-        &self,
-        _inventory: &Inventory,
-        topology: &T,
-    ) -> Result<Outcome, InterpretError> {
-        info!(
-            "Executing PostgreSQLInterpret with config {:?}",
-            self.config
-        );
-
-        let cluster_name = topology
-            .deploy(&self.config)
-            .await
-            .map_err(|e| InterpretError::from(e))?;
-
-        Ok(Outcome::success(format!(
-            "Deployed PostgreSQL cluster `{cluster_name}`"
-        )))
+        let metadata = ObjectMeta {
+            name: Some("postgres".to_string()),
+            namespace: Some(self.namespace.clone()),
+            ..ObjectMeta::default()
+        };
+
+        let spec = ClusterSpec {
+            instances: self.instances,
+            image_name: self.image_name.clone(),
+            storage: Storage {
+                size: self.storage_size.clone(),
+            },
+            bootstrap: Bootstrap {
+                initdb: Initdb {
+                    database: "app".to_string(),
+                    owner: "app".to_string(),
+                },
+            },
+            ..ClusterSpec::default()
+        };
+
+        let cluster = Cluster { metadata, spec };
+
+        K8sResourceScore::single(cluster, Some(self.namespace.clone())).create_interpret()
+    }
+
+    fn name(&self) -> String {
+        format!("PostgreSQLScore({})", self.namespace)
     }
 }