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"""
Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
SPDX-License-Identifier: MIT-0
"""
from cfnlint.rules import CloudFormationLintRule, RuleMatch


class BackupPlanLifecycleRule(CloudFormationLintRule):
    """Check Backup Plan rules with lifecycle has minimum period between cold and delete"""

    id = "E3504"
    shortdesc = "Check minimum 90 period is met between BackupPlan cold and delete"
    description = "Check that Backup plans with lifecycle rules have >= 90 days between cold and delete"
    source_url = "https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-backup-backupplan-lifecycleresourcetype.html"
    tags = ["properties", "backup", "plan", "lifecycle"]

    def match(self, cfn):
        """Check cold storage and deletion lifecycle period differences"""
        matches = []
        results = cfn.get_resource_properties(
            ["AWS::Backup::BackupPlan", "BackupPlan", "BackupPlanRule", "Lifecycle"]
        )

        for result in results:
            backup_rule = result["Value"]
            # if 'MoveToColdStorageAfterDays' in backup_rule and 'DeleteAfterDays' in backup_rule:
            if isinstance(
                backup_rule.get("MoveToColdStorageAfterDays"), int
            ) and isinstance(backup_rule.get("DeleteAfterDays"), int):
                if (
                    backup_rule["DeleteAfterDays"]
                    - backup_rule["MoveToColdStorageAfterDays"]
                    < 90
                ):
                    message = "DeleteAfterDays in {0} must be at least 90 days after MoveToColdStorageAfterDays"
                    rule_match = RuleMatch(
                        result["Path"],
                        message.format("/".join(map(str, result["Path"]))),
                    )
                    matches.append(rule_match)

        return matches

Filemanager

Name Type Size Permission Actions
__pycache__ Folder 0755
BackupPlanLifecycleRule.py File 1.83 KB 0644
__init__.py File 106 B 0644