feat(postgres): adding pgbouncer support for cnpg component

Mandatory for large scale deployements

components/hydra-cnpg-database/kustomization.yaml

@@ -6,28 +6,7 @@ configurations:
 
 resources:
 - ./resources/hydra-cnpg-cluster.yaml
-
-secretGenerator:
-- name: hydra-postgres-admin
-  type: Secret
-  literals:
-  - username=postgres
-  - password=NotSoSecret
-- name: hydra-postgres-user
-  type: Secret
-  literals:
-  - username=hydra
-  - password=NotSoSecret
-
-
-vars:
-- name: HYDRA_DATABASE_SERVICE_NAME
-  objref:
-    name: hydra-postgres
-    kind: Cluster
-    apiVersion: postgresql.cnpg.io/v1
-  fieldref:
-    fieldpath: metadata.name
+- ./resources/hydra-postgres-pooler-rw.yaml
 
 patches:
 - target:

components/hydra-cnpg-database/patches/hydra-deployment.yaml

@@ -4,7 +4,7 @@
     name: HYDRA_DATABASE_USER
     valueFrom:
       secretKeyRef:
-        name: hydra-postgres-user
+        name: hydra-postgres-app
         key: username
 - op: add
   path: "/spec/template/spec/containers/0/env/-"
@@ -12,10 +12,15 @@
     name: HYDRA_DATABASE_PASSWORD
     valueFrom:
       secretKeyRef:
-        name: hydra-postgres-user
+        name: hydra-postgres-app
         key: password
+- op: add
+  path: "/spec/template/spec/containers/0/env/-"
+  value:
+    name: HYDRA_DATABASE_SERVICE_NAME
+    value: hydra-postgres-pooler-rw
 - op: add
   path: "/spec/template/spec/containers/0/env/-"
   value:
     name: DSN
-    value: "postgres://$(HYDRA_DATABASE_USER):$(HYDRA_DATABASE_PASSWORD)@$(HYDRA_DATABASE_SERVICE_NAME)-rw:5432/hydra?sslmode=disable"
+    value: "postgres://$(HYDRA_DATABASE_USER):$(HYDRA_DATABASE_PASSWORD)@$(HYDRA_DATABASE_SERVICE_NAME):5432/hydra?sslmode=disable"

components/hydra-cnpg-database/patches/hydra-janitor-cronjob.yaml

@@ -4,7 +4,7 @@
     name: HYDRA_DATABASE_USER
     valueFrom:
       secretKeyRef:
-        name: hydra-postgres-user
+        name: hydra-postgres-app
         key: username
 - op: add
   path: "/spec/jobTemplate/spec/template/spec/containers/0/env/-"
@@ -12,10 +12,18 @@
     name: HYDRA_DATABASE_PASSWORD
     valueFrom:
       secretKeyRef:
-        name: hydra-postgres-user
+        name: hydra-postgres-app
         key: password
+- op: add
+  path: "/spec/jobTemplate/spec/template/spec/containers/0/env/-"
+  value:
+    name: HYDRA_DATABASE_SERVICE_NAME
+    valueFrom:
+      secretKeyRef:
+        name: hydra-postgres-app
+        key: host
 - op: add
   path: "/spec/jobTemplate/spec/template/spec/containers/0/env/-"
   value:
     name: DSN
-    value: "postgres://$(HYDRA_DATABASE_USER):$(HYDRA_DATABASE_PASSWORD)@$(HYDRA_DATABASE_SERVICE_NAME)-rw:5432/hydra?sslmode=disable"
+    value: "postgres://$(HYDRA_DATABASE_USER):$(HYDRA_DATABASE_PASSWORD)@$(HYDRA_DATABASE_SERVICE_NAME):5432/hydra?sslmode=disable"

components/hydra-cnpg-database/patches/hydra-migrate-job.yaml

@@ -4,7 +4,7 @@
     name: HYDRA_DATABASE_USER
     valueFrom:
       secretKeyRef:
-        name: hydra-postgres-user
+        name: hydra-postgres-app
         key: username
 - op: add
   path: "/spec/template/spec/containers/0/env/-"
@@ -12,10 +12,18 @@
     name: HYDRA_DATABASE_PASSWORD
     valueFrom:
       secretKeyRef:
-        name: hydra-postgres-user
+        name: hydra-postgres-app
         key: password
+- op: add
+  path: "/spec/template/spec/containers/0/env/-"
+  value:
+    name: HYDRA_DATABASE_SERVICE_NAME
+    valueFrom:
+      secretKeyRef:
+        name: hydra-postgres-app
+        key: host
 - op: add
   path: "/spec/template/spec/containers/0/env/-"
   value:
     name: DSN
-    value: "postgres://$(HYDRA_DATABASE_USER):$(HYDRA_DATABASE_PASSWORD)@$(HYDRA_DATABASE_SERVICE_NAME)-rw:5432/hydra?sslmode=disable"
+    value: "postgres://$(HYDRA_DATABASE_USER):$(HYDRA_DATABASE_PASSWORD)@$(HYDRA_DATABASE_SERVICE_NAME):5432/hydra?sslmode=disable"

components/hydra-cnpg-database/resources/hydra-cnpg-cluster.yaml

@@ -5,13 +5,9 @@ metadata:
 spec:
   instances: 3
   primaryUpdateStrategy: unsupervised
-  superuserSecret:
-    name: hydra-postgres-admin
   bootstrap:
     initdb:
       database: hydra
       owner: hydra
-      secret:
-        name: hydra-postgres-user
   storage:
-    size: 2Gi
+    size: 2Gi

components/hydra-cnpg-database/resources/hydra-postgres-pooler-rw.yaml

@@ -0,0 +1,14 @@
+apiVersion: postgresql.cnpg.io/v1
+kind: Pooler
+metadata:
+  name: hydra-postgres-pooler-rw
+spec:
+  cluster:
+    name: hydra-postgres
+  instances: 3
+  type: rw
+  pgbouncer:
+    poolMode: session
+    parameters:
+      max_client_conn: "1000"
+      default_pool_size: "50"