Add Keycloak provisioning

With this commit it's now possible to provision a fairly default
Keycloak instance backed by our PostgreSQL implementation.

Makefile

@@ -91,6 +91,12 @@ generate-stackgres-crds:
 	go run github.com/deepmap/oapi-codegen/cmd/oapi-codegen --package=v1 -generate=types -o apis/stackgres/v1/sgcluster.gen.go apis/stackgres/v1/sgcluster.yaml
 	perl -i -0pe 's/\*struct\s\{\n\s\sAdditionalProperties\smap\[string\]string\s`json:"-"`\n\s}/map\[string\]string/gms' apis/stackgres/v1/sgcluster.gen.go
 
+	# curl ${STACKGRES_CRD_URL}/SGPoolingConfig.yaml?inline=false -o apis/stackgres/v1/sgpoolconfigs_crd.yaml
+	# yq -i e apis/stackgres/v1/sgpoolconfigs.yaml --expression ".components.schemas.SGPoolingConfigSpec=load(\"apis/stackgres/v1/sgpoolconfigs_crd.yaml\").spec.versions[0].schema.openAPIV3Schema.properties.spec"
+	# yq -i e apis/stackgres/v1/sgpoolconfigs.yaml --expression ".components.schemas.SGPoolingConfigStatus=load(\"apis/stackgres/v1/sgpoolconfigs_crd.yaml\").spec.versions[0].schema.openAPIV3Schema.properties.status"
+	# go run github.com/deepmap/oapi-codegen/cmd/oapi-codegen --package=v1 -generate=types -o apis/stackgres/v1/sgpoolconfigs.gen.go apis/stackgres/v1/sgpoolconfigs.yaml
+	# perl -i -0pe 's/\*struct\s\{\n\s\sAdditionalProperties\smap\[string\]string\s`json:"-"`\n\s}/map\[string\]string/gms' apis/stackgres/v1/sgpoolconfigs.gen.go
+
 	go run sigs.k8s.io/controller-tools/cmd/controller-gen object paths=./apis/stackgres/v1/...
 	rm apis/stackgres/v1/*_crd.yaml
 

apis/stackgres/v1/groupversion_info.go

@@ -28,5 +28,7 @@ func init() {
 		&SGClusterList{},
 		&SGPostgresConfig{},
 		&SGPostgesConfigList{},
+		&SGPoolingConfigList{},
+		&SGPoolingConfig{},
 	)
 }

apis/stackgres/v1/sgpoolconfigs.go

@@ -0,0 +1,28 @@
+package v1
+
+import (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+// +kubebuilder:object:root=true
+
+// SGPoolingConfig is the API for creating pgbouncer configs clusters.
+type SGPoolingConfig struct {
+	metav1.TypeMeta   `json:",inline"`
+	metav1.ObjectMeta `json:"metadata,omitempty"`
+
+	// Spec defines the desired state of a VSHNPostgreSQL.
+	Spec SGPoolingConfigSpec `json:"spec"`
+
+	// Status reflects the observed state of a VSHNPostgreSQL.
+	Status SGPoolingConfigStatus `json:"status,omitempty"`
+}
+
+// +kubebuilder:object:root=true
+
+type SGPoolingConfigList struct {
+	metav1.TypeMeta `json:",inline"`
+	metav1.ListMeta `json:"metadata,omitempty"`
+
+	Items []SGPoolingConfig `json:"items"`
+}

apis/stackgres/v1/sgpoolconfigs.yaml

@@ -0,0 +1,75 @@
+openapi: "3.0.2"
+paths:
+  "/spec":
+    get:
+      responses:
+        "200":
+          content:
+            "application/json":
+              schema:
+                "$ref": "#/components/schemas/SGPoolingConfigSpec"
+  "/status":
+    get:
+      responses:
+        "200":
+          content:
+            "application/json":
+              schema:
+                "$ref": "#/components/schemas/SGPoolingConfigStatus"
+components:
+  schemas:
+    SGPoolingConfigSpec:
+      type: object
+      properties:
+        pgBouncer:
+          type: object
+          description: |
+            Connection pooling configuration based on PgBouncer.
+          properties:
+            pgbouncer.ini:
+              type: object
+              description: |
+                The `pgbouncer.ini` parameters the configuration contains, represented as an object where the keys are valid names for the `pgbouncer.ini` configuration file parameters.
+
+                Check [pgbouncer configuration](https://www.pgbouncer.org/config.html#generic-settings) for more information about supported parameters.
+              properties:
+                pgbouncer:
+                  type: object
+                  additionalProperties: true
+                  description: |
+                    The `pgbouncer.ini` (Section [pgbouncer]) parameters the configuration contains, represented as an object where the keys are valid names for the `pgbouncer.ini` configuration file parameters.
+
+                    Check [pgbouncer configuration](https://www.pgbouncer.org/config.html#generic-settings) for more information about supported parameters
+                databases:
+                  type: object
+                  additionalProperties:
+                    type: object
+                    additionalProperties: true
+                  description: |
+                    The `pgbouncer.ini` (Section [databases]) parameters the configuration contains, represented as an object where the keys are valid names for the `pgbouncer.ini` configuration file parameters.
+
+                    Check [pgbouncer configuration](https://www.pgbouncer.org/config.html#section-databases) for more information about supported parameters.
+                users:
+                  type: object
+                  additionalProperties:
+                    type: object
+                    additionalProperties: true
+                  description: |
+                    The `pgbouncer.ini` (Section [users]) parameters the configuration contains, represented as an object where the keys are valid names for the `pgbouncer.ini` configuration file parameters.
+
+                    Check [pgbouncer configuration](https://www.pgbouncer.org/config.html#section-users) for more information about supported parameters.
+    SGPoolingConfigStatus:
+      type: object
+      properties:
+        pgBouncer:
+          type: object
+          description: |
+            Connection pooling configuration status based on PgBouncer.
+          properties:
+            defaultParameters:
+              type: object
+              additionalProperties:
+                type: string
+              description: |
+                The `pgbouncer.ini` default parameters parameters which are used if not set.
+          required: ["defaultParameters"]