feat(cloud_sql): Add samples for SQL Server Advanced DR switchover

cloud_sql/sqlserver_instance_switchover/create_dr_replica/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_sqlserver_instance_create_dr_replica]
+resource "google_sql_database_instance" "original-primary" {
+  name   = "sqlserver-primary-instance-name"
+  region = "us-east1"
+  # Specify a database version that supports Cloud SQL Enterprise Plus edition.
+  database_version = "SQLSERVER_2022_ENTERPRISE"
+  instance_type    = "CLOUD_SQL_INSTANCE"
+  root_password    = "INSERT-PASSWORD-HERE"
+  replica_names    = ["sqlserver-replica-instance-name"]
+  settings {
+    tier    = "db-perf-optimized-N-2"
+    edition = "ENTERPRISE_PLUS"
+    backup_configuration {
+      enabled = "true"
+    }
+  }
+}
+
+resource "google_sql_database_instance" "dr_replica" {
+  name = "sqlserver-replica-instance-name"
+  # Specify the original primary instance as the master instance.
+  master_instance_name = google_sql_database_instance.original-primary.name
+  # DR replica must be in a different region than the region of the primary instance.
+  region = "us-west2"
+  # DR replica must be the same database version as the primary instance.
+  database_version = "SQLSERVER_2022_ENTERPRISE"
+  instance_type    = "READ_REPLICA_INSTANCE"
+  root_password    = "INSERT-PASSWORD-HERE"
+  replica_configuration {
+    # Make the replica a cascadable replica.
+    cascadable_replica = true
+  }
+
+  settings {
+    # DR replica must be in the same tier as your primary instance and support Enterprise Plus edition.
+    tier    = "db-perf-optimized-N-2"
+    edition = "ENTERPRISE_PLUS"
+  }
+}
+# [END cloud_sql_sqlserver_instance_create_dr_replica]

cloud_sql/sqlserver_instance_switchover/create_dr_replica/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: sqlserver_instance_switchover_create_dr_replica
+spec:
+  skip: true

cloud_sql/sqlserver_instance_switchover/switchover_begin/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_sqlserver_instance_switchover_begin]
+resource "google_sql_database_instance" "original-primary" {
+  name             = "sqlserver-primary-instance-name"
+  region           = "us-east1"
+  database_version = "SQLSERVER_2022_ENTERPRISE"
+  instance_type    = "CLOUD_SQL_INSTANCE"
+  root_password    = "INSERT-PASSWORD-HERE"
+  replica_names    = ["sqlserver-replica-instance-name"]
+  settings {
+    tier    = "db-perf-optimized-N-2"
+    edition = "ENTERPRISE_PLUS"
+    backup_configuration {
+      enabled = "true"
+    }
+  }
+}
+
+resource "google_sql_database_instance" "dr_replica" {
+  name = "sqlserver-replica-instance-name"
+  # Remove or comment out the master_instance_name
+  # master_instance_name = google_sql_database_instance.original-primary.name
+  region           = "us-west2"
+  database_version = "SQLSERVER_2022_ENTERPRISE"
+  # Change the instance type from "READ_REPLICA_INSTANCE" to "CLOUD_SQL_INSTANCE".
+  instance_type = "CLOUD_SQL_INSTANCE"
+  root_password = "INSERT-PASSWORD-HERE"
+  # Add the original primary to the replica_names list
+  replica_names = ["sqlserver-primary-instance-name"]
+  # Remove or comment out the replica_configuration section
+  # replica_configuration {
+  #  cascadable_replica = true
+  # }
+
+  settings {
+    tier    = "db-perf-optimized-N-2"
+    edition = "ENTERPRISE_PLUS"
+  }
+}
+# [END cloud_sql_sqlserver_instance_switchover_begin]

cloud_sql/sqlserver_instance_switchover/switchover_begin/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: sqlserver_instance_switchover_switchover_begin
+spec:
+  skip: true

cloud_sql/sqlserver_instance_switchover/switchover_finish/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_sqlserver_instance_switchover_finish]
+resource "google_sql_database_instance" "original-primary" {
+  name = "sqlserver-primary-instance-name"
+  # Set master_instance_name to the new primary instance, the original DR replica.
+  master_instance_name = "sqlserver-replica-instance-name"
+  region               = "us-east1"
+  database_version     = "SQLSERVER_2022_ENTERPRISE"
+  # Change the instance type from "CLOUD_SQL_INSTANCE" to "READ_REPLICA_INSTANCE".
+  instance_type = "READ_REPLICA_INSTANCE"
+  root_password = "INSERT-PASSWORD-HERE"
+  # Remove  values from the replica_names field, but don't remove the field itself.
+  replica_names = []
+  # Add replica_configuration section and set cascadable_replica to true.
+  replica_configuration {
+    cascadable_replica = true
+  }
+  settings {
+    tier    = "db-perf-optimized-N-2"
+    edition = "ENTERPRISE_PLUS"
+    backup_configuration {
+      enabled = "true"
+    }
+  }
+}
+
+resource "google_sql_database_instance" "dr_replica" {
+  name             = "sqlserver-replica-instance-name"
+  region           = "us-west2"
+  database_version = "SQLSERVER_2022_ENTERPRISE"
+  # Change the instance type from "READ_REPLICA_INSTANCE" to "CLOUD_SQL_INSTANCE".
+  instance_type = "CLOUD_SQL_INSTANCE"
+  root_password = "INSERT-PASSWORD-HERE"
+  # Add the original primary to the replica_names list
+  replica_names = ["sqlserver-primary-instance-name"]
+  settings {
+    tier    = "db-perf-optimized-N-2"
+    edition = "ENTERPRISE_PLUS"
+  }
+}
+# [END cloud_sql_sqlserver_instance_switchover_finish]

cloud_sql/sqlserver_instance_switchover/switchover_finish/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: sqlserver_instance_switchover_switchover_finish
+spec:
+  skip: true