feat(postgres): adding hydra max_conns parameter support

Mandatory for large scale deployements

components/hydra-cnpg-database/kustomization.yaml

@@ -7,28 +7,6 @@ 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
-
 patches:
 - target:
     group: apps

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 +12,18 @@
     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&max_conns=$(HYDRA_DATABASE_MAX_CONN)"

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

resources/hydra/kustomization.yaml

@@ -30,6 +30,7 @@ configMapGenerator:
   - URLS_CONSENT=http://hydra-consent-app/consent
   - URLS_LOGOUT=http://hydra-logout-app/logout
   - HYDRA_SERVE_ALL_ARGS=--dev
+  - HYDRA_DATABASE_MAX_CONN="10"
   - LOG_LEVEL=info
 
 vars: