From f7a8c236096844be3d66854de5a2dff533a8c33f Mon Sep 17 00:00:00 2001
From: Felix Delattre <felix@developmentseed.org>
Date: Tue, 21 Jul 2026 20:45:37 +0200
Subject: [PATCH] fix: improved autoscaling based on database config.

---
 .../montandon-eoapi/application.yaml          | 34 +++++++++++++++++--
 .../montandon-eoapi/application.yaml          | 34 +++++++++++++++++--
 2 files changed, 64 insertions(+), 4 deletions(-)

diff --git a/applications/argocd/production/applications/montandon-eoapi/application.yaml b/applications/argocd/production/applications/montandon-eoapi/application.yaml
index 806f199..16cef3e 100644
--- a/applications/argocd/production/applications/montandon-eoapi/application.yaml
+++ b/applications/argocd/production/applications/montandon-eoapi/application.yaml
@@ -54,17 +54,36 @@ spec:
           image:
             tag: 6.1.2
           overrideRootPath: ""
+          # External Azure PG + HPA: keep concurrency/pools capped.
+          # Ceiling: maxReplicas × WEB_CONCURRENCY × pools(2 w/ transactions) × DB_MAX_CONN_SIZE
+          # See https://github.com/developmentseed/eoapi-k8s/blob/main/docs/autoscaling.md#external--shared-postgresql
+          autoscaling:
+            enabled: true
+            minReplicas: 1
+            maxReplicas: 3
+            type: "cpu"
+            targets:
+              cpu: 70
+            behavior:
+              scaleDown:
+                stabilizationWindowSeconds: 300
+              scaleUp:
+                stabilizationWindowSeconds: 60
           settings:
             labels:
               azure.workload.identity/use: "true"
             resources:
               requests:
                 memory: "2048Mi"
-                cpu: "10m"
+                # HPA CPU% is relative to requests; keep this meaningful (not near-zero).
+                cpu: "500m"
               limits:
                 memory: "4096Mi"
                 cpu: "1000m"
             envVars:
+              WEB_CONCURRENCY: "4"
+              DB_MIN_CONN_SIZE: "1"
+              DB_MAX_CONN_SIZE: "1"
               ENABLE_TRANSACTIONS_EXTENSIONS: "TRUE"
               FORWARDED_ALLOW_IPS: "*"
               PROXY_HEADERS: True
@@ -144,7 +163,18 @@ spec:
           tls:
             enabled: true
             secretName: "montandon-eoapi-helm-secret-cert"
-        replicaCount: 1
+        autoscaling:
+          enabled: true
+          minReplicas: 1
+          maxReplicas: 3
+          targetCPUUtilizationPercentage: 75
+        resources:
+          limits:
+            cpu: 500m
+            memory: "2048Mi"
+          requests:
+            cpu: 200m
+            memory: "1024Mi"
         extraVolumes:
           - name: filters
             configMap:
diff --git a/applications/argocd/staging/applications/montandon-eoapi/application.yaml b/applications/argocd/staging/applications/montandon-eoapi/application.yaml
index 6a0d7a0..1af510e 100644
--- a/applications/argocd/staging/applications/montandon-eoapi/application.yaml
+++ b/applications/argocd/staging/applications/montandon-eoapi/application.yaml
@@ -54,17 +54,36 @@ spec:
           image:
             tag: 6.1.2
           overrideRootPath: ""
+          # External Azure PG + HPA: keep concurrency/pools capped.
+          # Ceiling: maxReplicas × WEB_CONCURRENCY × pools(2 w/ transactions) × DB_MAX_CONN_SIZE
+          # See https://github.com/developmentseed/eoapi-k8s/blob/main/docs/autoscaling.md#external--shared-postgresql
+          autoscaling:
+            enabled: true
+            minReplicas: 1
+            maxReplicas: 3
+            type: "cpu"
+            targets:
+              cpu: 70
+            behavior:
+              scaleDown:
+                stabilizationWindowSeconds: 300
+              scaleUp:
+                stabilizationWindowSeconds: 60
           settings:
             labels:
               azure.workload.identity/use: "true"
             resources:
               requests:
                 memory: "2048Mi"
-                cpu: "10m"
+                # HPA CPU% is relative to requests; keep this meaningful (not near-zero).
+                cpu: "500m"
               limits:
                 memory: "4096Mi"
                 cpu: "1000m"
             envVars:
+              WEB_CONCURRENCY: "4"
+              DB_MIN_CONN_SIZE: "1"
+              DB_MAX_CONN_SIZE: "1"
               ENABLE_TRANSACTIONS_EXTENSIONS: "TRUE"
               FORWARDED_ALLOW_IPS: "*"
               PROXY_HEADERS: True
@@ -144,7 +163,18 @@ spec:
           tls:
             enabled: true
             secretName: "montandon-eoapi-helm-secret-cert"
-        replicaCount: 1
+        autoscaling:
+          enabled: true
+          minReplicas: 1
+          maxReplicas: 3
+          targetCPUUtilizationPercentage: 75
+        resources:
+          limits:
+            cpu: 500m
+            memory: "2048Mi"
+          requests:
+            cpu: 200m
+            memory: "1024Mi"
         extraVolumes:
           - name: filters
             configMap: