feat(gingress): add Git UA routing and convert gingress to Helm templates

- Route requests with git/JGit User-Agent directly to gitserver backend
- Parse gingress.io/git-backend annotation (format: namespace/name:port)
- Convert static gingress YAML to Helm templates under deploy/templates/gingress/
- Add gingress config block to values.yaml (namespace, replicas, ports, resources)

apps/gingress/src/controller/ingress_watcher.rs

@@ -131,7 +131,7 @@ fn process_ingress(ingress: &Ingress, store: &ConfigStore, _ingress_class: &str)
 
     // Process annotations for advanced features
     let annotations = ingress.annotations();
-    process_annotations(&annotations, &ingress_prefix, store);
+    process_annotations(&annotations, &ingress_prefix, &namespace, store);
 
     store.signal_reload();
 }
@@ -163,6 +163,7 @@ const ANN_RATE_LIMIT_BURST: &str = "gingress.io/rate-limit-burst";
 const ANN_REQUEST_HEADERS: &str = "gingress.io/request-headers";
 const ANN_WEBSOCKET: &str = "gingress.io/websocket";
 const ANN_SESSION_AFFINITY: &str = "gingress.io/session-affinity";
+const ANN_GIT_BACKEND: &str = "gingress.io/git-backend";
 
 /// Parse Ingress annotations and write corresponding ConfigStore entries.
 ///
@@ -175,6 +176,7 @@ const ANN_SESSION_AFFINITY: &str = "gingress.io/session-affinity";
 fn process_annotations(
     annotations: &BTreeMap<String, String>,
     ingress_prefix: &str,
+    namespace: &str,
     store: &ConfigStore,
 ) {
     // Collect hosts from the ingress routes that were just stored
@@ -256,6 +258,22 @@ fn process_annotations(
             );
         }
     }
+
+    // ── Git backend ──
+    // When present, requests with Git User-Agent (git/*, JGit/*) are routed to
+    // this backend instead of normal host+path matching.
+    // Value format: "namespace/service-name:port" or "service-name:port" (namespace from Ingress)
+    if let Some(val) = annotations.get(ANN_GIT_BACKEND) {
+        if let Some(backend) = parse_git_backend(val, &namespace) {
+            store.set("git_backend", &backend);
+            tracing::info!(
+                backend = format!("{}/{}:{}", backend.namespace, backend.name, backend.port),
+                "Git backend configured"
+            );
+        } else {
+            tracing::warn!(annotation = %ANN_GIT_BACKEND, value = %val, "Invalid git-backend format, expected 'namespace/name:port' or 'name:port'");
+        }
+    }
 }
 
 fn parse_rate_limit(val: &str, burst_override: Option<&String>) -> (u32, u32) {
@@ -321,6 +339,34 @@ fn parse_session_affinity(val: &str) -> (bool, String, u64) {
     }
 }
 
+/// Parse git-backend annotation value.
+///
+/// Format: "namespace/name:port" or "name:port" (namespace defaults to Ingress namespace).
+fn parse_git_backend(val: &str, default_namespace: &str) -> Option<gingress_proxy::config::Backend> {
+    let val = val.trim();
+    // Split off port: "namespace/name:port" → ("namespace/name", "port")
+    let (ns_name, port_str) = val.rsplit_once(':').unwrap_or((val, ""));
+    let port: u16 = port_str.parse().ok()?;
+
+    // Split namespace and name: "namespace/name" → ("namespace", "name")
+    let (namespace, name) = if let Some((ns, n)) = ns_name.rsplit_once('/') {
+        (ns.to_string(), n.to_string())
+    } else {
+        // No namespace specified — use the Ingress namespace
+        (default_namespace.to_string(), ns_name.to_string())
+    };
+
+    if name.is_empty() {
+        return None;
+    }
+
+    Some(gingress_proxy::config::Backend {
+        namespace,
+        name,
+        port,
+    })
+}
+
 /// Remove a set of hosts from the global websocket host list (scoped cleanup).
 fn prune_websocket_hosts(store: &ConfigStore, hosts_to_remove: &[String]) {
     if let Some(mut existing) = store.get::<Vec<String>>("websocket:hosts") {

apps/gingress/src/controller/reconciler.rs

@@ -71,6 +71,7 @@ impl Reconciler {
         let headers = self.collect_headers();
         let session_affinity = self.collect_session_affinity(&routes);
         let websocket_hosts = self.collect_websocket_hosts();
+        let git_upstream = self.collect_git_backend();
 
         // Step 5: Build the complete ProxyConfig
         let cfg = ProxyConfig {
@@ -81,6 +82,7 @@ impl Reconciler {
             headers,
             session_affinity,
             websocket_hosts,
+            git_upstream,
         };
 
         // Step 6: Validate
@@ -231,4 +233,9 @@ impl Reconciler {
             .get::<Vec<String>>("websocket:hosts")
             .unwrap_or_default()
     }
+
+    /// Collect git backend configuration from annotation.
+    fn collect_git_backend(&self) -> Option<gingress_proxy::config::Backend> {
+        self.store.get("git_backend")
+    }
 }

deploy/templates/gingress/deployment.yaml

@@ -2,11 +2,11 @@ apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: gingress-controller
-  namespace: gingress-system
+  namespace: {{ .Values.gingress.namespace | default "gingress-system" }}
   labels:
     app: gingress
 spec:
-  replicas: 2
+  replicas: {{ .Values.gingress.replicaCount | default 2 }}
   selector:
     matchLabels:
       app: gingress
@@ -18,28 +18,30 @@ spec:
       serviceAccountName: gingress-controller
       containers:
         - name: gingress
-          image: gingress:latest
-          imagePullPolicy: IfNotPresent
+          image: "{{ .Values.imageRegistry }}/{{ .Values.gingress.repository }}:{{ .Values.imageTag | default .Chart.AppVersion }}"
+          imagePullPolicy: {{ .Values.gingress.imagePullPolicy | default "IfNotPresent" }}
+          {{- with .Values.securityContext }}
+          securityContext:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
           args:
             - "--ingress-class=gingress"
-            - "--bind-http=0.0.0.0:80"
-            - "--bind-https=0.0.0.0:443"
+            - "--bind-http=0.0.0.0:{{ .Values.gingress.httpPort | default 80 }}"
+            - "--bind-https=0.0.0.0:{{ .Values.gingress.httpsPort | default 443 }}"
             - "--metrics-bind=0.0.0.0:8080"
           ports:
             - name: http
-              containerPort: 80
+              containerPort: {{ .Values.gingress.httpPort | default 80 }}
               protocol: TCP
             - name: https
-              containerPort: 443
+              containerPort: {{ .Values.gingress.httpsPort | default 443 }}
               protocol: TCP
             - name: metrics
               containerPort: 8080
               protocol: TCP
           env:
             - name: RUST_LOG
-              value: "info"
-            - name: METRICS_PUSH_URL
-              value: ""  # Optional: push to metrics aggregator
+              value: {{ .Values.gingress.logLevel | default "info" | quote }}
           livenessProbe:
             httpGet:
               path: /healthz
@@ -52,13 +54,10 @@ spec:
               port: 8080
             initialDelaySeconds: 5
             periodSeconds: 5
+          {{- with .Values.gingress.resources }}
           resources:
-            requests:
-              cpu: 100m
-              memory: 128Mi
-            limits:
-              cpu: 500m
-              memory: 512Mi
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
       affinity:
         podAntiAffinity:
           preferredDuringSchedulingIgnoredDuringExecution:
@@ -67,27 +66,4 @@ spec:
                 labelSelector:
                   matchLabels:
                     app: gingress
-                topologyKey: kubernetes.io/hostname
----
-apiVersion: v1
-kind: Service
-metadata:
-  name: gingress
-  namespace: gingress-system
-spec:
-  type: LoadBalancer
-  selector:
-    app: gingress
-  ports:
-    - name: http
-      port: 80
-      targetPort: 80
-      protocol: TCP
-    - name: https
-      port: 443
-      targetPort: 443
-      protocol: TCP
-    - name: metrics
-      port: 8080
-      targetPort: 8080
-      protocol: TCP
+                topologyKey: kubernetes.io/hostname

deploy/templates/gingress/rbac.yaml

@@ -1,13 +1,13 @@
 apiVersion: v1
 kind: Namespace
 metadata:
-  name: gingress-system
+  name: {{ .Values.gingress.namespace | default "gingress-system" }}
 ---
 apiVersion: v1
 kind: ServiceAccount
 metadata:
   name: gingress-controller
-  namespace: gingress-system
+  namespace: {{ .Values.gingress.namespace | default "gingress-system" }}
 ---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRole
@@ -38,11 +38,11 @@ roleRef:
 subjects:
   - kind: ServiceAccount
     name: gingress-controller
-    namespace: gingress-system
+    namespace: {{ .Values.gingress.namespace | default "gingress-system" }}
 ---
 apiVersion: networking.k8s.io/v1
 kind: IngressClass
 metadata:
   name: gingress
 spec:
-  controller: gingress.io/gingress-controller
+  controller: gingress.io/gingress-controller

deploy/templates/gingress/service.yaml

@@ -0,0 +1,20 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: gingress
+  namespace: {{ .Values.gingress.namespace | default "gingress-system" }}
+  labels:
+    app: gingress
+spec:
+  type: LoadBalancer
+  selector:
+    app: gingress
+  ports:
+    - name: http
+      port: {{ .Values.gingress.httpPort | default 80 }}
+      targetPort: http
+      protocol: TCP
+    - name: https
+      port: {{ .Values.gingress.httpsPort | default 443 }}
+      targetPort: https
+      protocol: TCP

deploy/values.yaml

@@ -137,6 +137,22 @@ services:
         mountPath: /data
         subPath: static
 
+# Gingress controller configuration
+gingress:
+  namespace: "gingress-system"
+  repository: gingress
+  replicaCount: 2
+  httpPort: 80
+  httpsPort: 443
+  logLevel: "info"
+  resources:
+    requests:
+      cpu: 100m
+      memory: 128Mi
+    limits:
+      cpu: 500m
+      memory: 512Mi
+
 # External PVC (managed outside Helm — not deleted on uninstall)
 pvcName: "shared-data"
 
@@ -146,6 +162,7 @@ ingress:
   className: "gingress"
   annotations:
     cert-manager.io/cluster-issuer: "letsencrypt-prod"
+    gingress.io/git-backend: "deploy-gitserver:8021"
   hosts:
     - host: gitdata.ai
       paths:

libs/gingress-proxy/src/config.rs

@@ -90,6 +90,8 @@ pub struct ProxyConfig {
     pub session_affinity: HashMap<String, SessionAffinityConfig>,
     /// WebSocket enabled hosts
     pub websocket_hosts: Vec<String>,
+    /// Git backend — requests with Git User-Agent are routed here
+    pub git_upstream: Option<Backend>,
 }
 
 /// The shared configuration store: read-heavy, write-light.

libs/gingress-proxy/src/server.rs

@@ -41,6 +41,23 @@ impl GIngressProxy {
     pub fn filter_chain(&self) -> &Arc<std::sync::RwLock<FilterChain>> {
         &self.filter_chain
     }
+
+    /// Match a request to a route rule based on host and path.
+    fn match_route(cfg: &crate::config::ProxyConfig, host: &str, path: &str) -> Option<String> {
+        cfg.routes.get(host).and_then(|rules| {
+            rules.iter().find(|r| match r.path_type {
+                crate::config::PathType::Prefix | crate::config::PathType::ImplementationSpecific => {
+                    path.starts_with(&r.path)
+                }
+                crate::config::PathType::Exact => path == r.path,
+            })
+        }).map(|r| {
+            format!(
+                "upstream:{}/{}:{}",
+                r.backend.namespace, r.backend.name, r.backend.port
+            )
+        })
+    }
 }
 
 #[async_trait::async_trait]
@@ -66,23 +83,29 @@ impl ProxyHttp for GIngressProxy {
 
         let cfg = self.config.assemble_proxy_config();
 
-        // Match path to a route rule
-        let path = session.req_header().uri.path();
-        let route = cfg.routes.get(&host).and_then(|rules| {
-            rules.iter().find(|r| match r.path_type {
-                crate::config::PathType::Prefix | crate::config::PathType::ImplementationSpecific => {
-                    path.starts_with(&r.path)
-                }
-                crate::config::PathType::Exact => path == r.path,
-            })
-        });
+        // Git User-Agent override: requests from git clients (git/2.x, JGit, etc.)
+        // are routed directly to the git backend regardless of host/path matching.
+        let backend_key = if let Some(ref git_backend) = cfg.git_upstream {
+            let ua = session
+                .req_header()
+                .headers
+                .get("user-agent")
+                .and_then(|v| v.to_str().ok())
+                .unwrap_or("");
 
-        let backend_key = route.map(|r| {
-            format!(
-                "upstream:{}/{}:{}",
-                r.backend.namespace, r.backend.name, r.backend.port
-            )
-        });
+            if ua.starts_with("git/") || ua.starts_with("JGit/") {
+                tracing::debug!(host, ua, "Git UA detected, routing to git backend");
+                Some(format!(
+                    "upstream:{}/{}:{}",
+                    git_backend.namespace, git_backend.name, git_backend.port
+                ))
+            } else {
+                // Normal route matching for non-git requests
+                Self::match_route(&cfg, &host, session.req_header().uri.path())
+            }
+        } else {
+            Self::match_route(&cfg, &host, session.req_header().uri.path())
+        };
 
         // Select endpoint via load balancer
         let endpoint = backend_key
@@ -105,7 +128,7 @@ impl ProxyHttp for GIngressProxy {
             }
             None => pingora::Error::e_explain(
                 pingora::ErrorType::InternalError,
-                format!("no upstream found for host '{}' path '{}'", host, path),
+                format!("no upstream found for host '{}' path '{}'", host, session.req_header().uri.path()),
             ),
         }
     }