add hostnames to pages

crates/lib/pager/src/client/pager_builder.rs

@@ -13,6 +13,7 @@ pub struct PagerBuilder {
   client_config: Option<PagerClientConfig>,
   application_name: Option<String>,
   environment: Option<String>,
+  hostname: Option<String>,
   queue_capacity: Option<usize>,
 }
 
@@ -22,6 +23,7 @@ impl PagerBuilder {
       client_config: None,
       application_name: None,
       environment: None,
+      hostname: None,
       queue_capacity: None,
     }
   }
@@ -38,6 +40,12 @@ impl PagerBuilder {
     self
   }
 
+  /// Set the hostname of the machine sending alerts.
+  pub fn hostname(mut self, hostname: String) -> Self {
+    self.hostname = Some(hostname);
+    self
+  }
+
   /// Configure the Rootly backend. Returns a sub-builder for Rootly-specific options.
   pub fn rootly(self, api_key: RootlyApiKey) -> RootlyConfigBuilder {
     RootlyConfigBuilder {
@@ -105,7 +113,7 @@ impl PagerBuilder {
       }
     };
 
-    PagerClient::new(client_config, self.application_name.clone(), self.environment.clone())
+    PagerClient::new(client_config, self.application_name.clone(), self.environment.clone(), self.hostname.clone())
   }
 }
 

crates/lib/pager/src/client/pager_client.rs

@@ -20,6 +20,9 @@ pub struct PagerClient {
 
   /// Environment label (e.g. "production", "staging"). Inserted as a label on alerts.
   pub environment: Option<String>,
+
+  /// Hostname of the machine sending alerts. Inserted as a label on alerts.
+  pub hostname: Option<String>,
 }
 
 /// Configuration for the pager client backend.
@@ -58,8 +61,9 @@ impl PagerClient {
     client_config: PagerClientConfig,
     application_name: Option<String>,
     environment: Option<String>,
+    hostname: Option<String>,
   ) -> Self {
-    Self { client_config, application_name, environment }
+    Self { client_config, application_name, environment, hostname }
   }
 
   pub fn is_noop(&self) -> bool {
@@ -104,13 +108,23 @@ impl PagerClient {
       labels.push(("environment".to_string(), env.clone()));
     }
 
+    if let Some(h) = &self.hostname {
+      labels.push(("hostname".to_string(), h.clone()));
+    }
+
     let labels = if labels.is_empty() { None } else { Some(labels) };
 
+    // Enrich the description with hostname if both are present.
+    let description = match (&notification.description, &self.hostname) {
+      (Some(desc), Some(h)) => Some(format!("{}\n\nHostname: {}", desc, h)),
+      (desc, _) => desc.clone(),
+    };
+
     let result = create_alert(CreateAlertArgs {
       api_key: api_key.clone(),
       source,
       summary: notification.summary.clone(),
-      description: notification.description.clone(),
+      description,
       status: Some("triggered".to_string()),
       service_ids: None,
       group_ids: None,

crates/service/web/storyteller_web/src/main.rs

@@ -339,7 +339,7 @@ async fn main() -> AnyhowResult<()> {
     ServerEnvironment::Development => server_environment::ServerEnvironment::Development,
   };
 
-  let (pager, pager_worker, paging_flags) = build_pager(server_environment_typed);
+  let (pager, pager_worker, paging_flags) = build_pager(server_environment_typed, &server_hostname);
 
   info!("Spawning pager worker thread.");
 

crates/service/web/storyteller_web/src/startup/build_pager.rs

@@ -8,6 +8,7 @@ use crate::state::flags::paging_flags::PagingFlags;
 
 pub fn build_pager(
   server_environment: server_environment::ServerEnvironment,
+  hostname: &str,
 ) -> (Pager, PagerWorker, PagingFlags) {
   let paging_flags = PagingFlags::from_env();
 
@@ -19,22 +20,20 @@ pub fn build_pager(
     "development"
   };
 
+  let builder = PagerBuilder::new()
+      .application_name("storyteller-web".to_string())
+      .environment(environment.to_string())
+      .hostname(hostname.to_string());
+  
   // If paging is globally disabled, use a NoOp pager regardless of API key.
   if !paging_flags.is_paging_enabled {
     warn!("ENABLE_PAGING is false. Pager will be NoOp.");
-    let (pager, worker) = PagerBuilder::new()
-      .application_name("storyteller-web".to_string())
-      .environment(environment.to_string())
-      .build_with_worker();
+    let (pager, worker) = builder.build_with_worker();
     return (pager, worker, paging_flags);
   }
 
   let maybe_api_key = easyenv::get_env_string_optional("ROOTLY_API_KEY");
 
-  let builder = PagerBuilder::new()
-      .application_name("storyteller-web".to_string())
-      .environment(environment.to_string());
-
   let (pager, worker) = match maybe_api_key {
     Some(api_key) => {
       info!("Rootly API key found. Configuring pager with Rootly backend.");