From f74fc704b6de0f8bb82d64d089c04305105606b2 Mon Sep 17 00:00:00 2001
From: Tanguy Herbron <tanguy.herbron@outlook.com>
Date: Tue, 29 Apr 2025 17:24:03 +0200
Subject: [PATCH] feat(networking): Deploy gitea on primary node to allow
 faster traffic

---
 manifests/database-local-service.yaml | 17 +++++++++++++++++
 manifests/database.yaml               |  8 ++++++++
 manifests/deployment.yaml             | 16 +++++++++++++++-
 manifests/kustomization.yaml          |  1 +
 4 files changed, 41 insertions(+), 1 deletion(-)
 create mode 100644 manifests/database-local-service.yaml

diff --git a/manifests/database-local-service.yaml b/manifests/database-local-service.yaml
new file mode 100644
index 0000000..2a48208
--- /dev/null
+++ b/manifests/database-local-service.yaml
@@ -0,0 +1,17 @@
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    cnpg.io/cluster: gitea-db
+  name: gitea-db-local
+  namespace: gitea
+spec:
+  internalTrafficPolicy: Local
+  ports:
+  - name: postgres
+    port: 5432
+    protocol: TCP
+    targetPort: 5432
+  selector:
+    cnpg.io/cluster: gitea-db
+    cnpg.io/instanceRole: primary
diff --git a/manifests/database.yaml b/manifests/database.yaml
index 8f0a7e7..443c4d0 100644
--- a/manifests/database.yaml
+++ b/manifests/database.yaml
@@ -51,3 +51,11 @@ spec:
 
   monitoring:
     enablePodMonitor: true
+
+  topologySpreadConstraints:
+    - maxSkew: 1
+      topologyKey: zone
+      whenUnsatisfiable: DoNotSchedule
+      labelSelector:
+        matchLabels:
+          cnpg.io/cluster: gitea-db
diff --git a/manifests/deployment.yaml b/manifests/deployment.yaml
index 0ae7190..84d48c3 100644
--- a/manifests/deployment.yaml
+++ b/manifests/deployment.yaml
@@ -15,6 +15,20 @@ spec:
         spec:
             hostname: gitea
             subdomain: gitea
+            affinity:
+              podAffinity:
+                requiredDuringSchedulingIgnoredDuringExecution:
+                  - labelSelector:
+                      matchExpressions:
+                        - key: cnpg.io/cluster
+                          operator: In
+                          values:
+                            - gitea-db
+                        - key: cnpg.io/instanceRole
+                          operator: In
+                          values:
+                            - primary
+                    topologyKey: "kubernetes.io/hostname"
             containers:
               - name: gitea
                 image: gitea/gitea:1.23.7
@@ -24,7 +38,7 @@ spec:
                   - name: GITEA__database__DB_TYPE
                     value: "postgres"
                   - name: GITEA__database__HOST
-                    value: "gitea-db-rw.gitea.svc.cluster.local:5432"
+                    value: "gitea-db-local.gitea.svc.cluster.local:5432"
                   - name: GITEA__database__NAME
                     value: "gitea"
                   - name: GITEA__database__SSL_MODE
diff --git a/manifests/kustomization.yaml b/manifests/kustomization.yaml
index 5477d97..5e983b3 100644
--- a/manifests/kustomization.yaml
+++ b/manifests/kustomization.yaml
@@ -5,6 +5,7 @@ resources:
   - namespace.yaml
   - secrets.yaml
   - database.yaml
+  - database-local-service.yaml
   - database-backup.yaml
   - service.yaml
   - servicemonitor.yaml