From 8a70e64d95177d8041c9aaa20b11774c8261cabb Mon Sep 17 00:00:00 2001
From: womfoo <kraniumgikos.mendoza@iohk.io>
Date: Mon, 29 Jul 2024 09:15:49 +1000
Subject: [PATCH] feat: postgres metrics (#868)

Signed-off-by: Kranium Gikos Mendoza <kraniumgikos.mendoza@iohk.io>
---
 .../node/templates/podmonitor-postgresql.yaml | 14 +++++++++++
 .../charts/node/templates/postgresql.yaml     | 25 +++++++++++++++++++
 infrastructure/charts/node/values.yaml        |  6 +++++
 3 files changed, 45 insertions(+)
 create mode 100644 infrastructure/charts/node/templates/podmonitor-postgresql.yaml

diff --git a/infrastructure/charts/node/templates/podmonitor-postgresql.yaml b/infrastructure/charts/node/templates/podmonitor-postgresql.yaml
new file mode 100644
index 000000000..91b14f81f
--- /dev/null
+++ b/infrastructure/charts/node/templates/podmonitor-postgresql.yaml
@@ -0,0 +1,14 @@
+{{- if .Values.database.postgres.metrics.enabled }}
+apiVersion: monitoring.coreos.com/v1
+kind: PodMonitor
+metadata:
+  name: postgres-metrics
+  namespace: {{ .Release.Namespace }}
+spec:
+  podMetricsEndpoints:
+    - path: /metrics
+      port: exporter
+  selector:
+    matchLabels:
+      application: spilo
+{{- end }}
diff --git a/infrastructure/charts/node/templates/postgresql.yaml b/infrastructure/charts/node/templates/postgresql.yaml
index 814e4dc49..5c993b249 100644
--- a/infrastructure/charts/node/templates/postgresql.yaml
+++ b/infrastructure/charts/node/templates/postgresql.yaml
@@ -19,3 +19,28 @@ spec:
     prism: prism-admin
   postgresql:
     version: "14"
+{{- if .Values.database.postgres.metrics.enabled }}
+  sidecars:
+    - name: exporter
+      image: "{{ .Values.database.postgres.metrics.image.repository }}/{{ .Values.database.postgres.metrics.image.tag }}:{{ .Values.database.postgres.metrics.image.version }}"
+      args:
+        - --collector.stat_statements
+      ports:
+        - name: exporter
+          containerPort: 9187
+          protocol: TCP
+      resources:
+        limits:
+          cpu: 500m
+          memory: 256M
+        requests:
+          cpu: 100m
+          memory: 256M
+      env:
+        - name: DATA_SOURCE_URI
+          value: "127.0.0.1:5432"
+        - name: DATA_SOURCE_USER
+          value: "$(POSTGRES_USER)"
+        - name: DATA_SOURCE_PASS
+          value: "$(POSTGRES_PASSWORD)"
+{{- end }}
diff --git a/infrastructure/charts/node/values.yaml b/infrastructure/charts/node/values.yaml
index ec1428a76..f76b14a4f 100644
--- a/infrastructure/charts/node/values.yaml
+++ b/infrastructure/charts/node/values.yaml
@@ -39,6 +39,12 @@ database:
     managingTeam: atala
     databaseSize: 4Gi
     numberOfInstances: 2
+    metrics:
+      enabled: false
+      image:
+        repository: quay.io/prometheuscommunity
+        tag: postgres-exporter
+        version: v0.15.0
 
 vdr:
   externalResources: