Initial commit

Author: Travis McPeak

.gitignore

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+*.pyc
+.DS_Store
+.DS_Store?
+

AUTHORS

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+- Patrick Kelley <[email protected]>
+- Travis McPeak <[email protected]>

LICENSE

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OSSMETADATA

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+osslifecycle=active

README.md

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+# Repokid #
+
+Repokid uses Access Advisor provided by [Aardvark](https://github.com/Netflix-Skunkworks/aardvark)
+to remove permissions granting access to unused services from the inline policies of IAM roles in
+an AWS account.
+
+## Getting Started
+
+To use Repokid you will need:
+ - A [DynamoDB](https://aws.amazon.com/dynamodb/) table called `repokid_roles` (specify account and endpoint in `dynamo_db` in config file)
+ 
+ - An IAM role with the following permissions (specified in `connection_iam` in config file):
+ ```{
+  "Version": "2012-10-17",
+  "Statement": [
+    {
+      "Sid": "Stmt1495554068860",
+      "Action": [
+        "iam:DeleteInstanceProfile",
+        "iam:DeleteRole",
+        "iam:DeleteRolePolicy",
+        "iam:GetInstanceProfile",
+        "iam:GetRole",
+        "iam:GetRolePolicy",
+        "iam:ListInstanceProfiles",
+        "iam:ListInstanceProfilesForRole",
+        "iam:ListRolePolicies",
+        "iam:ListRoles",
+        "iam:PutRolePolicy"
+      ],
+      "Effect": "Allow",
+      "Resource": "*"
+    }
+  ]
+}
+```
+
+ - An IAM role with DyamoDB permissions for the `repokid_roles` table and all indexes (specified in `assume_role` subsection of `dynamo_db` in config)
+
+## Optional Config
+Repokid uses filters to decide which roles are candidates to be repoed.  Filters may be configured to suit your
+environment as described below.
+
+### Blacklist Filter
+Roles may be excluded by adding them to the Blacklist filter.  One common reason to exclude a role is if
+the corresponding workload performs occasional actions that may not have been observed but are known to be
+required.  There are two ways to exclude a role:
+
+ - Exclude role name for all accounts: add it to a list in the config `filter_config.BlacklistFilter.all`
+ - Exclude role name for specific account: add it to a list in the config `filter_config.BlacklistFilter.<ACCOUNT_NUMBER>`
+
+### Age Filter
+By default the age filter excludes roles that are younger than 90 days.  To change this edit the config setting:
+`filter_config.AgeFilter.minimum_age`.
+
+### Active Filters
+New filters can be created to support internal logic.  At Netflix we have several that are specific to our
+use cases.  To make them active make sure they are in the Python path and add them in the config to the list in
+the section `active_filters`.
+
+## How to Use
+Once Repokid is configured use it as follows:
+
+### Standard flow
+ - Update role cache: `repokid update_role_cache <ACCOUNT_NUMBER>`
+ - Display role cache: `repokid display_role_cache <ACCOUNT_NUMBER>`
+ - Display information about a specific role: `repokid display_role <ACCOUNT_NUMBER> <ROLE_NAME>`
+ - Repo a specific role: `repokid repo_role <ACCOUNT_NUMBER> <ROLE_NAME>`
+ - Repo all roles in an account: `repokid repo_all_roles <ACCOUNT_NUMBER> -c`
+
+### Rolling back
+Repokid stores a copy of each version of inline policies it knows about.  These are added when
+a different version of a policy is found during `update_role_cache` and any time a repo action
+occurs.  To restore a previous version run:
+
+See all versions of roles: `repokid rollback_role <ACCOUNT_NUMBER> <ROLE_NAME>`
+Restore a specific version: `repokid rollback_role <ACCOUNT_NUMBER> <ROLE_NAME> --selection=<NUMBER> -c`
+
+### Stats
+Repokid keeps counts of the total permissions for each role.  Stats are added any time an `update_role_cache` or
+`repo_role` action occur.  To output all stats to a CSV file run: `repokid repo_stats <OUTPUT_FILENAME>`.  An optional account number can be specified to output stats for a specific account only.
+
+## Developing locally
+You can run a DynamoDB development server locally by [downloading it](http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/DynamoDBLocal.html)
+
+To run:
+  `java -Djava.library.path=./DynamoDBLocal_lib -jar DynamoDBLocal.jar -sharedDb -inMemory -port 8010`
+  
+## TODO
+[TODO](TODO.md)

repokid/__init__.py

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+import datetime
+from dateutil.tz import tzlocal
+from repokid.repokid import Filter
+from repokid.repokid import LOGGER
+
+
+class AgeFilter(Filter):
+    def apply(self, input_list):
+        now = datetime.datetime.now(tzlocal())
+        try:
+            days_delta = self.config['minimum_age']
+        except KeyError:
+            LOGGER.info('Minimum age not set in config, using default 90 days')
+            days_delta = 90
+
+        ago = datetime.timedelta(days=days_delta)
+
+        too_young = []
+        for role in input_list:
+            if role['CreateDate'] > now - ago:
+                LOGGER.info('Role {name} created too recently to cleanup. ({date})'.format(
+                            name=role['RoleName'], date=role['CreateDate']))
+                too_young.append(role)
+        return too_young

repokid/filters/__init__.py

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+from repokid.repokid import Filter
+from repokid.repokid import CUR_ACCOUNT_NUMBER
+from repokid.repokid import LOGGER
+
+
+class BlacklistFilter(Filter):
+    def __init__(self, config=None):
+        self.config = config
+
+        overridden_role_names = set()
+        overridden_role_names.update([rolename.lower() for rolename in config.get(CUR_ACCOUNT_NUMBER, [])])
+        overridden_role_names.update([rolename.lower() for rolename in config.get('all', [])])
+        self.overridden_role_names = overridden_role_names
+
+    def apply(self, input_list):
+        blacklisted_roles = []
+        for role in input_list:
+            if role['RoleName'].lower() in self.overridden_role_names:
+                blacklisted_roles.append(role)
+                LOGGER.info('{name} in the role blacklist'.format(name=role['RoleName']))
+        return blacklisted_roles

repokid/filters/age/__init__.py

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+from repokid.repokid import Filter
+from repokid.repokid import LOGGER
+
+
+class LambdaFilter(Filter):
+    def apply(self, input_list):
+        lambda_roles = []
+
+        for role in input_list:
+            if 'lambda' in str(role['AssumeRolePolicyDocument']).lower():
+                LOGGER.info('{name} looks like a lambda role.'.format(name=role['RoleName']))
+                lambda_roles.append(role)
+        return list(lambda_roles)