feat(cloud_sql): add MCP instances examples

cloud_sql/mysql_instance_managed_connection_pooling/main.tf

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+/**
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+# [START cloud_sql_mysql_instance_managed_connection_pooling_creation]
+# This example shows creating an instance with Managed Connection Pooling.
+resource "google_sql_database_instance" "mysql_managed_connection_pooling_creation" {
+  name                = "mysql-instance-managed-connection-pooling-creation"
+  region              = "us-central1"
+  database_version    = "MYSQL_8_0"
+  deletion_protection = false
+
+  settings {
+    tier    = "db-perf-optimized-N-2"
+    edition = "ENTERPRISE_PLUS"
+    connection_pool_config {
+      connection_pooling_enabled = true
+    }
+  }
+}
+# [END cloud_sql_mysql_instance_managed_connection_pooling_creation]
+
+# [START cloud_sql_mysql_instance_managed_connection_pooling_enable]
+# This example shows creating an instance with Managed Connection Pooling enabled and custom flags set.
+resource "google_sql_database_instance" "mysql_managed_connection_pooling_enable" {
+  name                = "mysql-instance-managed-connection-pooling-enable"
+  region              = "us-central1"
+  database_version    = "MYSQL_8_0"
+  deletion_protection = false
+
+  settings {
+    tier    = "db-perf-optimized-N-2"
+    edition = "ENTERPRISE_PLUS"
+    connection_pool_config {
+      connection_pooling_enabled = true
+    }
+  }
+}
+# [END cloud_sql_mysql_instance_managed_connection_pooling_enable]
+
+# [START cloud_sql_mysql_instance_managed_connection_pooling_modify]
+# This example shows modifying the flags of an existing Managed Connection Pooling configuration.
+resource "google_sql_database_instance" "mysql_managed_connection_pooling_modify" {
+  name                = "mysql-instance-managed-connection-pooling-modify"
+  region              = "us-central1"
+  database_version    = "MYSQL_8_0"
+  deletion_protection = false
+
+  settings {
+    tier    = "db-perf-optimized-N-2"
+    edition = "ENTERPRISE_PLUS"
+    connection_pool_config {
+      connection_pooling_enabled = true
+      flags {
+        name  = "max_pool_size" # Modify or add the name and value of an flag
+        value = "10"
+      }
+    }
+  }
+}
+# [END cloud_sql_mysql_instance_managed_connection_pooling_modify]
+
+# [START cloud_sql_mysql_instance_managed_connection_pooling_disable]
+# This example shows disabling Managed Connection Pooling on an existing instance.
+resource "google_sql_database_instance" "mysql_managed_connection_pooling_disable" {
+  name                = "mysql-instance-managed-connection-pooling-disable"
+  region              = "us-central1"
+  database_version    = "MYSQL_8_0"
+  deletion_protection = false
+
+  settings {
+    tier    = "db-perf-optimized-N-2"
+    edition = "ENTERPRISE_PLUS"
+    connection_pool_config {
+      # Set to false to disable Managed Connection Pooling. You can also remove the block entirely.
+      connection_pooling_enabled = false
+    }
+  }
+}
+# [END cloud_sql_mysql_instance_managed_connection_pooling_disable]

cloud_sql/mysql_instance_managed_connection_pooling/test.yaml

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+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+apiVersion: blueprints.cloud.google.com/v1alpha1
+kind: BlueprintTest
+metadata:
+  name: sql_mysql_instance_managed_connection_pooling
+spec:
+  skip: true

cloud_sql/postgres_instance_managed_connection_pooling/main.tf

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+/**
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+# [START cloud_sql_postgres_instance_managed_connection_pooling_creation]
+resource "google_sql_database_instance" "postgres_managed_connection_pooling_creation" {
+  name                = "postgres-instance-managed-connection-pooling-creation"
+  region              = "us-central1"
+  database_version    = "POSTGRES_16"
+  deletion_protection = false
+
+  settings {
+    tier    = "db-perf-optimized-N-2"
+    edition = "ENTERPRISE_PLUS"
+    connection_pool_config {
+      connection_pooling_enabled = true
+    }
+  }
+}
+# [END cloud_sql_postgres_instance_managed_connection_pooling_creation]
+
+# [START cloud_sql_postgres_instance_managed_connection_pooling_enable]
+resource "google_sql_database_instance" "postgres_managed_connection_pooling_enable" {
+  name                = "postgres-instance-managed-connection-pooling-enable"
+  region              = "us-central1"
+  database_version    = "POSTGRES_16"
+  deletion_protection = false
+
+  settings {
+    tier    = "db-perf-optimized-N-2"
+    edition = "ENTERPRISE_PLUS"
+    connection_pool_config {
+      connection_pooling_enabled = true # Set to true here
+    }
+  }
+}
+# [END cloud_sql_postgres_instance_managed_connection_pooling_enable]
+
+# [START cloud_sql_postgres_instance_managed_connection_pooling_modify]
+resource "google_sql_database_instance" "postgres_managed_connection_pooling_modify" {
+  name                = "postgres-instance-managed-connection-pooling-modify"
+  region              = "us-central1"
+  database_version    = "POSTGRES_16"
+  deletion_protection = false
+
+  settings {
+    tier    = "db-perf-optimized-N-2"
+    edition = "ENTERPRISE_PLUS"
+    connection_pool_config {
+      connection_pooling_enabled = true
+      flags {
+        name  = "max_pool_size" # Modify the value of an existing flag
+        value = "10"
+      }
+    }
+  }
+}
+# [END cloud_sql_postgres_instance_managed_connection_pooling_modify]
+
+# [START cloud_sql_postgres_instance_managed_connection_pooling_disable]
+resource "google_sql_database_instance" "postgres_managed_connection_pooling_disable" {
+  name                = "postgres-instance-managed-connection-pooling-disable"
+  region              = "us-central1"
+  database_version    = "POSTGRES_16"
+  deletion_protection = false
+
+  settings {
+    tier    = "db-perf-optimized-N-2"
+    edition = "ENTERPRISE_PLUS"
+    connection_pool_config {
+      # Set to false to disable Managed Connection Pooling. You can also remove the block entirely.
+      connection_pooling_enabled = false
+    }
+  }
+}
+# [END cloud_sql_postgres_instance_managed_connection_pooling_disable]

cloud_sql/postgres_instance_managed_connection_pooling/test.yaml

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+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+apiVersion: blueprints.cloud.google.com/v1alpha1
+kind: BlueprintTest
+metadata:
+  name: sql_postgres_instance_managed_connection_pooling
+spec:
+  skip: true