CIS 6.2.1 Ensure that the 'log_checkpoints' database flag for Cloud SQL PostgreSQL instance is set to 'on'

policies/templates/gcp_postgresql_log_checkpoints_v1.yaml

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+# Copyright 2021 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: templates.gatekeeper.sh/v1alpha1
+kind: ConstraintTemplate
+metadata:
+  name: gcp-postgresql-log-checkpoints-v1
+spec:
+  crd:
+    spec:
+      names:
+        kind: GCPPostgreSQLCheckpointsConstraintV1
+      validation:
+        openAPIV3Schema:
+          properties: {}
+  targets:
+    validation.gcp.forsetisecurity.org:
+      rego: | #INLINE("validator/postgresql_log_checkpoints.rego")
+        #
+        # Copyright 2021 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.
+        #
+
+        package templates.gcp.GCPPostgreSQLCheckpointsConstraintV1
+
+        import data.validator.gcp.lib as lib
+
+        # A violation is generated only when the rule body evaluates to true.
+        deny[{
+        	"msg": message,
+        	"details": metadata,
+        }] {
+        	constraint := input.constraint
+        	lib.get_constraint_params(constraint, params)
+        	asset := input.asset
+        	asset.asset_type == "sqladmin.googleapis.com/Instance"
+        	instance := asset.resource.data
+        	key = "log_checkpoints"
+
+        	# get instance settings
+        	settings := lib.get_default(instance, "settings", {"databaseFlags": []})
+
+        	# check if key is available and values are as expected
+        	not settings_databaseflags(settings)
+
+        	message := sprintf("On this resource %v Ensure the required key is '%v' and the value is ON.", [asset.name, key])
+        	metadata := {"resource": asset.name, "key_in_violation": key}
+        }
+
+        # check for log_checkpoints under settings databaseflags
+        settings_databaseflags(settings) {
+        	setdata := settings.databaseFlags[_]
+        	setdata.key == "log_checkpoints"
+        	setdata.value == "on"
+        }
+        #ENDINLINE

samples/postgresql_log_checkpoints.yaml

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+# Copyright 2021 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: constraints.gatekeeper.sh/v1alpha1
+kind: GCPPostgreSQLCheckpointsConstraintV1
+metadata:
+  name:  postgresql_log_checkpoints
+  annotations:
+    bundles.validator.forsetisecurity.org/cis-v1.1: 6.2.1
+    description: Checks if the 'log_checkpoints' database flag for Cloud SQL PostgreSQL instance is set to 'on'
+spec:
+  severity: high
+  match:
+      gcp:
+        target: ["organization/*"]
+  parameters: {}

validator/postgresql_log_checkpoints.rego

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+#
+# Copyright 2021 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.
+#
+
+package templates.gcp.GCPPostgreSQLCheckpointsConstraintV1
+
+import data.validator.gcp.lib as lib
+
+# A violation is generated only when the rule body evaluates to true.
+deny[{
+	"msg": message,
+	"details": metadata,
+}] {
+	constraint := input.constraint
+	lib.get_constraint_params(constraint, params)
+	asset := input.asset
+	asset.asset_type == "sqladmin.googleapis.com/Instance"
+	instance := asset.resource.data
+	key = "log_checkpoints"
+
+	# get instance settings
+	settings := lib.get_default(instance, "settings", {"databaseFlags": []})
+
+	# check if key is available and values are as expected
+	not settings_databaseflags(settings)
+
+	message := sprintf("On this resource %v Ensure the required key is '%v' and the value is ON.", [asset.name, key])
+	metadata := {"resource": asset.name, "key_in_violation": key}
+}
+
+# check for log_checkpoints under settings databaseflags
+settings_databaseflags(settings) {
+	setdata := settings.databaseFlags[_]
+	setdata.key == "log_checkpoints"
+	setdata.value == "on"
+}

validator/postgresql_log_checkpoints_test.rego

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+#
+# Copyright 2021 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.
+#
+package templates.gcp.GCPPostgreSQLCheckpointsConstraintV1
+
+import data.validator.gcp.lib as lib
+import data.validator.test_utils as test_utils
+
+import data.test.fixtures.postgresql_log_checkpoints.assets.no_settings as fixture_no_settings
+import data.test.fixtures.postgresql_log_checkpoints.assets.violations as fixture_violation
+
+import data.test.fixtures.postgresql_log_checkpoints.constraints as fixture_constraint
+
+template_name := "GCPPostgreSQLCheckpointsConstraintV1"
+
+#1. postgresql without correct key
+test_postgresql_log_checkpoints_without_correctkey {
+	expected_resource_names := {"//cloudsql.googleapis.com/projects/my-test-project/instances/tf-pg-ha-62380f9c-violation"}
+	test_utils.check_test_violations_count(fixture_violation, [fixture_constraint], template_name, 1)
+	test_utils.check_test_violations_resources(fixture_violation, [fixture_constraint], template_name, expected_resource_names)
+}
+
+#2. An instance without settings configured at all (settings doesn't exist).
+test_postgresql_log_checkpoints_no_settings {
+	expected_resource_names := {"//cloudsql.googleapis.com/projects/my-test-project/instances/tf-pg-ha-62380f9c-no-settings"}
+	expected_field_name := "key_in_violation"
+	expected_field_values := {"log_checkpoints"}
+	test_utils.check_test_violations_count(fixture_no_settings, [fixture_constraint], template_name, 1)
+	test_utils.check_test_violations_resources(fixture_no_settings, [fixture_constraint], template_name, expected_resource_names)
+	test_utils.check_test_violations_metadata(fixture_no_settings, [fixture_constraint], template_name, expected_field_name, expected_field_values)
+}

validator/test/fixtures/postgresql_log_checkpoints/assets/no_settings/data.json

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+[
+  {
+	"name": "//cloudsql.googleapis.com/projects/my-test-project/instances/tf-pg-ha-62380f9c-no-settings",
+	"asset_type": "sqladmin.googleapis.com/Instance",
+	"ancestry_path": "organization/614830067722/folder/561421552790/project/my-test-project",
+	"resource": {
+		"version": "v1beta4",
+		"discovery_document_uri": "https://www.googleapis.com/discovery/v1/apis/sqladmin/v1beta4/rest",
+		"discovery_name": "DatabaseInstance",
+		"parent": "//cloudresourcemanager.googleapis.com/projects/my-test-project",
+		"data": {
+			"databaseVersion": "POSTGRES_13",
+			"name": "tf-pg-ha-62380f9c-no-settings",
+			"project": "my-test-project",
+			"region": "us-central1",
+			"settings": {
+
+			}
+		}
+	}
+  },
+{
+    "name": "//compute.googleapis.com/projects/my-test-project/zones/us-central1-f/instances/test-jumphost",
+    "asset_type": "compute.googleapis.com/Instance",
+    "ancestry_path": "organization/614830067722/folder/561421552790/project/my-test-project",
+    "resource": {
+      "version": "v1",
+      "discovery_document_uri": "https://www.googleapis.com/discovery/v1/apis/compute/v1/rest",
+      "discovery_name": "Instance",
+      "parent": "//cloudresourcemanager.googleapis.com/projects/my-test-project",
+      "data": {
+        "canIpForward": false,
+        "deletionProtection": false,
+        "disks": [
+          {
+            "autoDelete": true,
+            "boot": true,
+            "initializeParams": {
+              "diskSizeGb": "20",
+              "diskType": "projects/my-test-project/zones/us-central1-f/diskTypes/pd-standard",
+              "sourceImage": "projects/centos-cloud/global/images/centos-8-v20210512"
+            },
+            "mode": "READ_WRITE"
+          }
+        ],
+        "displayDevice": {
+          "enableDisplay": false
+        },
+        "machineType": "projects/my-test-project/zones/us-central1-f/machineTypes/e2-micro",
+        "metadata": {
+          "items": [
+            {
+              "key": "block-project-ssh-keys",
+              "value": "true"
+            },
+            {
+              "key": "enable-oslogin",
+              "value": "false"
+            },
+            {
+              "key": "environment",
+              "value": "dev"
+            },
+            {
+              "key": "name",
+              "value": "test-jumphost"
+            },
+            {
+              "key": "serial-port-enable",
+              "value": "false"
+            },
+            {
+              "key": "startup-script",
+              "value": "echo instance created through terraform \u003e /readme.txt"
+            }
+          ]
+        },
+        "name": "test-jumphost",
+        "networkInterfaces": [
+          {
+            "accessConfigs": [
+              {
+                "type": "ONE_TO_ONE_NAT"
+              }
+            ],
+            "subnetwork": "projects/my-test-project/regions/us-central1/subnetworks/primary-dmz-subnet"
+          }
+        ],
+        "scheduling": {
+          "automaticRestart": true
+        },
+        "serviceAccounts": [
+          {
+            "email": "default",
+            "scopes": [
+              "https://www.googleapis.com/auth/cloud-platform"
+            ]
+          }
+        ],
+        "shieldedInstanceConfig": {
+          "enableIntegrityMonitoring": true,
+          "enableSecureBoot": false,
+          "enableVtpm": true
+        },
+        "tags": {
+          "items": [
+            "ingress-inet",
+            "egress-inet"
+          ]
+        }
+      }
+    }
+  }
+]