harmony/src/domain/topology/k8s_anywhere.rs

@@ -1,10 +1,11 @@
-use std::{process::Command, sync::Arc};
+use std::{collections::HashMap, process::Command, sync::Arc};
 
 use async_trait::async_trait;
 use inquire::Confirm;
 use log::{info, warn};
-use tokio::sync::OnceCell;
+use tokio::sync::{Mutex, OnceCell};
 
+use crate::score::Score;
 use crate::{
     executors::ExecutorError,
     interpret::{InterpretError, Outcome},
@@ -17,6 +18,7 @@ use crate::{
 use super::{
     HelmCommand, K8sclient, Topology,
     k8s::K8sClient,
+    oberservability::monitoring::{AlertReceiver, AlertReceiverProvision},
     tenant::{
         ResourceLimits, TenantConfig, TenantManager, TenantNetworkPolicy, k8s::K8sTenantManager,
     },
@@ -37,6 +39,7 @@ enum K8sSource {
 pub struct K8sAnywhereTopology {
     k8s_state: OnceCell<Option<K8sState>>,
     tenant_manager: OnceCell<K8sTenantManager>,
+    pub alert_receivers: Mutex<HashMap<String, OnceCell<AlertReceiver>>>,
 }
 
 #[async_trait]
@@ -61,9 +64,29 @@ impl K8sAnywhereTopology {
         Self {
             k8s_state: OnceCell::new(),
             tenant_manager: OnceCell::new(),
+            alert_receivers: Mutex::new(HashMap::new()),
         }
     }
 
+    pub async fn initialize_alert_receiver<C>(
+        &self,
+        config: &C,
+        inventory: &Inventory,
+    ) -> Result<AlertReceiver, InterpretError>
+    where
+        Self: Topology + HelmCommand,
+        C: AlertReceiverProvision<Self> + Send + Sync,
+    {
+        let score = config.get_deployment_score();
+        let interpret = score.create_interpret();
+        interpret.execute(inventory, self).await?;
+
+        Ok(AlertReceiver {
+            receiver_id: config.alert_receiver_id(),
+            receiver_installed: true,
+        })
+    }
+
     fn is_helm_available(&self) -> Result<(), String> {
         let version_result = Command::new("helm")
             .arg("version")

harmony/src/domain/topology/oberservability/monitoring.rs

@@ -1,14 +1,18 @@
 use async_trait::async_trait;
+use dyn_clone::DynClone;
+use serde::Serialize;
 
 use std::fmt::Debug;
-use url::Url;
 
 use crate::interpret::InterpretError;
 
+use crate::inventory::Inventory;
+use crate::score::Score;
+use crate::topology::HelmCommand;
 use crate::{interpret::Outcome, topology::Topology};
 
 /// Represents an entity responsible for collecting and organizing observability data
-/// from various telemetry sources
+/// from various telemetry sources such as Prometheus or Datadog
 /// A `Monitor` abstracts the logic required to scrape, aggregate, and structure
 /// monitoring data, enabling consistent processing regardless of the underlying data source.
 #[async_trait]
@@ -26,6 +30,26 @@ pub trait Monitor<T: Topology>: Debug + Send + Sync {
     ) -> Result<Outcome, InterpretError>;
 }
 
+#[async_trait]
+pub trait EnsureAlertReceiver<T: Topology>: Debug + DynClone + Send + Sync {
+    async fn ensure_alert_receiver(
+        &self,
+        inventory: Inventory,
+        topology: &T,
+    ) -> Result<Outcome, InterpretError>;
+}
+
+dyn_clone::clone_trait_object!(<T> EnsureAlertReceiver<T>);
+
+#[derive(Debug, Clone, Serialize)]
 pub struct AlertReceiver {
     pub receiver_id: String,
+    pub receiver_installed: bool,
+}
+
+/// Provides the ability to turn an alert config into an executable score
+/// for the topology
+pub trait AlertReceiverProvision<T: Topology + HelmCommand> {
+    fn get_deployment_score(&self) -> Box<dyn Score<T>>;
+    fn alert_receiver_id(&self) -> String;
 }

harmony/src/modules/monitoring/discord_webhook_sender.rs

@@ -1,32 +1,104 @@
+use super::discord_alert_manager::discord_alert_manager_score;
 use async_trait::async_trait;
-use serde_json::Value;
+use serde::Serialize;
+use serde_yaml::Value;
+use tokio::sync::OnceCell;
 use url::Url;
 
 use crate::{
-    interpret::{InterpretError, Outcome},
-    topology::K8sAnywhereTopology,
+    interpret::{Interpret, InterpretError, Outcome},
+    inventory::Inventory,
+    score::Score,
+    topology::{
+        HelmCommand, K8sAnywhereTopology, Topology,
+        oberservability::monitoring::{AlertReceiverProvision, EnsureAlertReceiver},
+    },
 };
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Serialize)]
 pub struct DiscordWebhookConfig {
     pub webhook_url: Url,
     pub name: String,
     pub send_resolved_notifications: bool,
 }
 
-pub trait DiscordWebhookReceiver {
-    fn deploy_discord_webhook_receiver(
+#[async_trait]
+impl<T: Topology + DiscordWebhookReceiver> EnsureAlertReceiver<T> for DiscordWebhookConfig {
+    async fn ensure_alert_receiver(
         &self,
-        _notification_adapter_id: &str,
-    ) -> Result<Outcome, InterpretError>;
+        inventory: Inventory,
+        topology: &T,
+    ) -> Result<Outcome, InterpretError> {
+        topology
+            .ensure_discord_webhook_receiver(&inventory, self.clone())
+            .await
+    }
+}
 
+impl<T: Topology + HelmCommand> AlertReceiverProvision<T> for DiscordWebhookConfig {
+    fn get_deployment_score(&self) -> Box<dyn Score<T>> {
+        Box::new(DiscordWebhookReceiverScore {
+            config: self.clone(),
+        })
+    }
+
+    fn alert_receiver_id(&self) -> String {
+        self.name.clone()
+    }
+}
+
+#[async_trait]
+pub trait DiscordWebhookReceiver {
+    async fn ensure_discord_webhook_receiver(
+        &self,
+        inventory: &Inventory,
+        config: DiscordWebhookConfig,
+    ) -> Result<Outcome, InterpretError>;
     fn delete_discord_webhook_receiver(
         &self,
-        _notification_adapter_id: &str,
+        config: DiscordWebhookConfig,
     ) -> Result<Outcome, InterpretError>;
 }
 
-// trait used to generate alert manager config values impl<T: Topology + AlertManagerConfig> Monitor for KubePrometheus
+#[async_trait]
+impl DiscordWebhookReceiver for K8sAnywhereTopology {
+    async fn ensure_discord_webhook_receiver(
+        &self,
+        inventory: &Inventory,
+        config: DiscordWebhookConfig,
+    ) -> Result<Outcome, InterpretError> {
+        let receiver_key = config.name.clone();
+        let mut adapters_map_guard = self.alert_receivers.lock().await;
+
+        let cell = adapters_map_guard
+            .entry(receiver_key.clone())
+            .or_insert_with(OnceCell::new);
+
+        if let Some(initialized_receiver) = cell.get() {
+            return Ok(Outcome::success(format!(
+                "Discord Webhook adapter for '{}' already initialized.",
+                initialized_receiver.receiver_id
+            )));
+        }
+
+        let final_state = cell
+            .get_or_try_init(|| async { self.initialize_alert_receiver(&config, inventory).await })
+            .await?;
+
+        Ok(Outcome::success(format!(
+            "Discord Webhook Receiver for '{}' ensured/initialized.",
+            final_state.receiver_id
+        )))
+    }
+
+    fn delete_discord_webhook_receiver(
+        &self,
+        _config: DiscordWebhookConfig,
+    ) -> Result<Outcome, InterpretError> {
+        todo!()
+    }
+}
+
 pub trait AlertManagerConfig<T> {
     fn get_alert_manager_config(&self) -> Result<Value, InterpretError>;
 }
@@ -38,18 +110,22 @@ impl<T: DiscordWebhookReceiver> AlertManagerConfig<T> for DiscordWebhookConfig {
     }
 }
 
-#[async_trait]
-impl DiscordWebhookReceiver for K8sAnywhereTopology {
-    fn deploy_discord_webhook_receiver(
-        &self,
-        _notification_adapter_id: &str,
-    ) -> Result<Outcome, InterpretError> {
-        todo!()
+#[derive(Debug, Clone, Serialize)]
+struct DiscordWebhookReceiverScore {
+    config: DiscordWebhookConfig,
+}
+
+impl<T: Topology + HelmCommand> Score<T> for DiscordWebhookReceiverScore {
+    fn create_interpret(&self) -> Box<dyn Interpret<T>> {
+        discord_alert_manager_score(
+            self.config.webhook_url.clone(),
+            self.config.name.clone(),
+            self.config.name.clone(),
+        )
+        .create_interpret()
     }
-    fn delete_discord_webhook_receiver(
-        &self,
-        _notification_adapter_id: &str,
-    ) -> Result<Outcome, InterpretError> {
-        todo!()
+
+    fn name(&self) -> String {
+        "DiscordWebhookReceiverScore".to_string()
     }
 }