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https://github.com/cloudposse/terraform-aws-cloudtrail-cloudwatch-alarms
Terraform module for creating alarms for tracking important changes and occurrences from cloudtrail.
https://github.com/cloudposse/terraform-aws-cloudtrail-cloudwatch-alarms
alarm cis cloudtrail cloudwatch-metrics devops security-audit slack terraform terraform-modules
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Terraform module for creating alarms for tracking important changes and occurrences from cloudtrail.
- Host: GitHub
- URL: https://github.com/cloudposse/terraform-aws-cloudtrail-cloudwatch-alarms
- Owner: cloudposse
- License: apache-2.0
- Created: 2018-06-22T19:06:09.000Z (over 6 years ago)
- Default Branch: main
- Last Pushed: 2024-12-11T03:18:40.000Z (12 days ago)
- Last Synced: 2024-12-15T23:02:26.611Z (7 days ago)
- Topics: alarm, cis, cloudtrail, cloudwatch-metrics, devops, security-audit, slack, terraform, terraform-modules
- Language: HCL
- Homepage: https://cloudposse.com/accelerate
- Size: 4.32 MB
- Stars: 202
- Watchers: 23
- Forks: 72
- Open Issues: 5
-
Metadata Files:
- Readme: README.md
- License: LICENSE
- Codeowners: .github/CODEOWNERS
Awesome Lists containing this project
README
Terraform module for creating alarms for tracking important changes and occurances from cloudtrail.
This module creates a set of filter metrics and alarms based on the security best practices covered in the [AWS CIS Foundations Benchmark](https://d0.awsstatic.com/whitepapers/compliance/AWS_CIS_Foundations_Benchmark.pdf) guide.
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## Usage
```hcl
module "metric_configs" {
source = "cloudposse/config/yaml"
# Cloud Posse recommends pinning every module to a specific version
# version = "x.x.x"
map_config_local_base_path = "./catalog"
map_config_paths = "*.yaml"
context = module.this.context
}
module "cloudtrail_api_alarms" {
source = "cloudposse/cloudtrail-cloudwatch-alarms/aws"
# Cloud Posse recommends pinning every module to a specific version
# version = "x.x.x"
log_group_name = "${aws_cloudwatch_log_group.default.name}"
metrics = module.metric_configs.map_configs
}
```
For detailed usage which includes setting up cloudtrail, cloudwatch logs, roles, policies, and the s3 bucket - as well as using this module see the [example directory](./examples/complete)
For aditional CIS rules and controls https://docs.aws.amazon.com/securityhub/latest/userguide/securityhub-cis-controls.html#securityhub-cis-controls-3.8
> [!IMPORTANT]
> In Cloud Posse's examples, we avoid pinning modules to specific versions to prevent discrepancies between the documentation
> and the latest released versions. However, for your own projects, we strongly advise pinning each module to the exact version
> you're using. This practice ensures the stability of your infrastructure. Additionally, we recommend implementing a systematic
> approach for updating versions to avoid unexpected changes.
## Examples
Here's a complete [example](examples/complete/main.tf) of using this `terraform-aws-cloudtrail-cloudwatch-alarms` module.
## Requirements
| Name | Version |
|------|---------|
| [terraform](#requirement\_terraform) | >= 1.0 |
| [aws](#requirement\_aws) | >= 4.0 |
## Providers
| Name | Version |
|------|---------|
| [aws](#provider\_aws) | >= 4.0 |
## Modules
| Name | Source | Version |
|------|--------|---------|
| [aws\_sns\_topic\_label](#module\_aws\_sns\_topic\_label) | cloudposse/label/null | 0.25.0 |
| [sns\_kms\_key](#module\_sns\_kms\_key) | cloudposse/kms-key/aws | 0.10.0 |
| [sns\_kms\_key\_label](#module\_sns\_kms\_key\_label) | cloudposse/label/null | 0.25.0 |
| [this](#module\_this) | cloudposse/label/null | 0.25.0 |
## Resources
| Name | Type |
|------|------|
| [aws_cloudwatch_dashboard.combined](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/cloudwatch_dashboard) | resource |
| [aws_cloudwatch_dashboard.individual](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/cloudwatch_dashboard) | resource |
| [aws_cloudwatch_log_metric_filter.default](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/cloudwatch_log_metric_filter) | resource |
| [aws_cloudwatch_metric_alarm.default](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/cloudwatch_metric_alarm) | resource |
| [aws_sns_topic.default](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/sns_topic) | resource |
| [aws_sns_topic_policy.default](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/sns_topic_policy) | resource |
| [aws_caller_identity.default](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/caller_identity) | data source |
| [aws_iam_policy_document.sns_kms_key_policy](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/iam_policy_document) | data source |
| [aws_iam_policy_document.sns_topic_policy](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/iam_policy_document) | data source |
| [aws_region.current](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/region) | data source |
## Inputs
| Name | Description | Type | Default | Required |
|------|-------------|------|---------|:--------:|
| [additional\_endpoint\_arns](#input\_additional\_endpoint\_arns) | Any alert endpoints, such as autoscaling, or app scaling endpoint arns that will respond to an alert | `list(string)` | `[]` | no |
| [additional\_tag\_map](#input\_additional\_tag\_map) | Additional key-value pairs to add to each map in `tags_as_list_of_maps`. Not added to `tags` or `id`.
This is for some rare cases where resources want additional configuration of tags
and therefore take a list of maps with tag key, value, and additional configuration. | `map(string)` | `{}` | no |
| [attributes](#input\_attributes) | ID element. Additional attributes (e.g. `workers` or `cluster`) to add to `id`,
in the order they appear in the list. New attributes are appended to the
end of the list. The elements of the list are joined by the `delimiter`
and treated as a single ID element. | `list(string)` | `[]` | no |
| [context](#input\_context) | Single object for setting entire context at once.
See description of individual variables for details.
Leave string and numeric variables as `null` to use default value.
Individual variable settings (non-null) override settings in context object,
except for attributes, tags, and additional\_tag\_map, which are merged. | `any` |
{
"additional_tag_map": {},
"attributes": [],
"delimiter": null,
"descriptor_formats": {},
"enabled": true,
"environment": null,
"id_length_limit": null,
"label_key_case": null,
"label_order": [],
"label_value_case": null,
"labels_as_tags": [
"unset"
],
"name": null,
"namespace": null,
"regex_replace_chars": null,
"stage": null,
"tags": {},
"tenant": null
} | no |
| [dashboard\_enabled](#input\_dashboard\_enabled) | When true a dashboard that displays the statistics as a line graph will be created in CloudWatch | `bool` | `true` | no |
| [delimiter](#input\_delimiter) | Delimiter to be used between ID elements.
Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
| [descriptor\_formats](#input\_descriptor\_formats) | Describe additional descriptors to be output in the `descriptors` output map.
Map of maps. Keys are names of descriptors. Values are maps of the form
`{
format = string
labels = list(string)
}`
(Type is `any` so the map values can later be enhanced to provide additional options.)
`format` is a Terraform format string to be passed to the `format()` function.
`labels` is a list of labels, in order, to pass to `format()` function.
Label values will be normalized before being passed to `format()` so they will be
identical to how they appear in `id`.
Default is `{}` (`descriptors` output will be empty). | `any` | `{}` | no |
| [enabled](#input\_enabled) | Set to false to prevent the module from creating any resources | `bool` | `null` | no |
| [environment](#input\_environment) | ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT' | `string` | `null` | no |
| [id\_length\_limit](#input\_id\_length\_limit) | Limit `id` to this many characters (minimum 6).
Set to `0` for unlimited length.
Set to `null` for keep the existing setting, which defaults to `0`.
Does not affect `id_full`. | `number` | `null` | no |
| [kms\_master\_key\_id](#input\_kms\_master\_key\_id) | The ID or alias of the customer master key (CMK) to use for encrypting the Amazon SNS topic.
The CMK must have its resource-based policy allow the service `cloudwatch.amazonaws.com` to perform `kms:Decrypt` and `kms:GenerateDataKey` on it.
If this variable is not supplied, a CMK with the sufficient resource-based policy will be created and used when configuring encryption for
the SNS topic. | `string` | `null` | no |
| [label\_key\_case](#input\_label\_key\_case) | Controls the letter case of the `tags` keys (label names) for tags generated by this module.
Does not affect keys of tags passed in via the `tags` input.
Possible values: `lower`, `title`, `upper`.
Default value: `title`. | `string` | `null` | no |
| [label\_order](#input\_label\_order) | The order in which the labels (ID elements) appear in the `id`.
Defaults to ["namespace", "environment", "stage", "name", "attributes"].
You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present. | `list(string)` | `null` | no |
| [label\_value\_case](#input\_label\_value\_case) | Controls the letter case of ID elements (labels) as included in `id`,
set as tag values, and output by this module individually.
Does not affect values of tags passed in via the `tags` input.
Possible values: `lower`, `title`, `upper` and `none` (no transformation).
Set this to `title` and set `delimiter` to `""` to yield Pascal Case IDs.
Default value: `lower`. | `string` | `null` | no |
| [labels\_as\_tags](#input\_labels\_as\_tags) | Set of labels (ID elements) to include as tags in the `tags` output.
Default is to include all labels.
Tags with empty values will not be included in the `tags` output.
Set to `[]` to suppress all generated tags.
**Notes:**
The value of the `name` tag, if included, will be the `id`, not the `name`.
Unlike other `null-label` inputs, the initial setting of `labels_as_tags` cannot be
changed in later chained modules. Attempts to change it will be silently ignored. | `set(string)` | [
"default"
]
| no |
| [log\_group\_name](#input\_log\_group\_name) | The cloudtrail cloudwatch log group name | `string` | n/a | yes |
| [log\_group\_region](#input\_log\_group\_region) | The log group region that should be monitored for unauthorised AWS API Access. Current region used if none provided. | `string` | `""` | no |
| [metric\_namespace](#input\_metric\_namespace) | A namespace for grouping all of the metrics together | `string` | `"CISBenchmark"` | no |
| [metrics](#input\_metrics) | The cloudwatch metrics and corresponding alarm definitions | map(object({
metric_name = string
filter_pattern = string
metric_namespace = string
metric_value = string
alarm_name = string
alarm_comparison_operator = string
alarm_evaluation_periods = string
alarm_period = string
alarm_statistic = string
alarm_treat_missing_data = string
alarm_threshold = string
alarm_description = string
})) | `{}` | no |
| [name](#input\_name) | ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.
This is the only ID element not also included as a `tag`.
The "name" tag is set to the full `id` string. There is no tag with the value of the `name` input. | `string` | `null` | no |
| [namespace](#input\_namespace) | ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique | `string` | `null` | no |
| [regex\_replace\_chars](#input\_regex\_replace\_chars) | Terraform regular expression (regex) string.
Characters matching the regex will be removed from the ID elements.
If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
| [sns\_policy\_enabled](#input\_sns\_policy\_enabled) | Attach a policy that allows the notifications through to the SNS topic endpoint | `bool` | `false` | no |
| [sns\_topic\_arn](#input\_sns\_topic\_arn) | An SNS topic ARN that has already been created. Its policy must already allow access from CloudWatch Alarms, or set `add_sns_policy` to `true` | `string` | `null` | no |
| [stage](#input\_stage) | ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |
| [tags](#input\_tags) | Additional tags (e.g. `{'BusinessUnit': 'XYZ'}`).
Neither the tag keys nor the tag values will be modified by this module. | `map(string)` | `{}` | no |
| [tenant](#input\_tenant) | ID element \_(Rarely used, not included by default)\_. A customer identifier, indicating who this instance of a resource is for | `string` | `null` | no |
## Outputs
| Name | Description |
|------|-------------|
| [dashboard\_combined](#output\_dashboard\_combined) | URL to CloudWatch Combined Metric Dashboard |
| [dashboard\_individual](#output\_dashboard\_individual) | URL to CloudWatch Individual Metric Dashboard |
| [sns\_topic\_arn](#output\_sns\_topic\_arn) | The ARN of the SNS topic used |
## Metrics Tracked
| Alarm's Name | Description |
|:--------------|:-------------------|
| `AuthorizationFailureCount` | Alarms when an unauthorized API call is made. |
| `S3BucketActivityEventCount` | Alarms when an API call is made to S3 to put or delete a Bucket, Bucket Policy or Bucket ACL. |
| `SecurityGroupEventCount` | Alarms when an API call is made to create, update or delete a Security Group. |
| `NetworkAclEventCount` | Alarms when an API call is made to create, update or delete a Network ACL. |
| `GatewayEventCount` | Alarms when an API call is made to create, update or delete a Customer or Internet Gateway. |
| `VpcEventCount` | Alarms when an API call is made to create, update or delete a VPC, VPC peering connection or VPC connection to classic. |
| `EC2InstanceEventCount` | Alarms when an API call is made to create, terminate, start, stop or reboot an EC2 instance. |
| `EC2LargeInstanceEventCount` | Alarms when an API call is made to create, terminate, start, stop or reboot a 4x-large or greater EC2 instance. |
| `CloudTrailEventCount` | Alarms when an API call is made to create, update or delete a .cloudtrail. trail, or to start or stop logging to a trail. |
| `ConsoleSignInFailureCount` | Alarms when an unauthenticated API call is made to sign into the console. |
| `IAMPolicyEventCount` | Alarms when an API call is made to change an IAM policy. |
| `ConsoleSignInWithoutMfaCount` | Alarms when a user logs into the console without MFA. |
| `RootAccountUsageCount` | Alarms when a root account usage is detected. |
| `KMSKeyPendingDeletionErrorCount` | Alarms when a customer created KMS key is pending deletion. |
| `AWSConfigChangeCount` | Alarms when AWS Config changes. |
| `RouteTableChangesCount` | Alarms when route table changes are detected. |
## Dashboard Created
Two CloudWatch Dashboards can be created as well, and will be automatically created by default.
## Credits
The alarm metric names, descriptions, and filters [from this repository were used](https://github.com/TeliaSoneraNorge/telia-terraform-modules/tree/master/cloudtrail-forwarder).
With many thanks to [Anton Babenko](https://github.com/antonbabenko) for pointing it out and saving us a lot of time scouring reference documents and describing alarms!
## Related Projects
Check out these related projects.
- [terraform-aws-cloudtrail](https://github.com/cloudposse/terraform-aws-cloudtrail) - Terraform module to provision an AWS CloudTrail and an encrypted S3 bucket with versioning to store CloudTrail logs
- [terraform-aws-cloudtrail-s3-bucket](https://github.com/cloudposse/terraform-aws-cloudtrail-s3-bucket) - S3 bucket with built in IAM policy to allow CloudTrail logs
- [terraform-aws-cloudwatch-logs](https://github.com/cloudposse/terraform-aws-cloudwatch-logs) - Terraform Module to Provide a CloudWatch Logs Endpoint
- [terraform-aws-cloudwatch-flow-logs](https://github.com/cloudposse/terraform-aws-cloudwatch-flow-logs) - Terraform module for enabling flow logs for vpc and subnets.
- [terraform-aws-ec2-cloudwatch-sns-alarms](https://github.com/cloudposse/terraform-aws-ec2-cloudwatch-sns-alarms) - Terraform module that configures CloudWatch SNS alerts for EC2 instances
- [terraform-aws-ecs-cloudwatch-sns-alarms](https://github.com/cloudposse/terraform-aws-ecs-cloudwatch-sns-alarms) - Terraform module for creating ECS service level alerts that go to an SNS endpoint
- [terraform-aws-efs-cloudwatch-sns-alarms](https://github.com/cloudposse/terraform-aws-efs-cloudwatch-sns-alarms) - Terraform module that configures CloudWatch SNS alerts for EFS
- [terrform-aws-elasticache-cloudwatch-sns-alarms](https://github.com/cloudposse/terraform-aws-elasticache-cloudwatch-sns-alarms) - Terraform module that configures CloudWatch SNS alerts for ElastiCache
- [terraform-aws-lambda-cloudwatch-sns-alarms](https://github.com/cloudposse/terraform-aws-lambda-cloudwatch-sns-alarms) - Terraform module for creating a set of Lambda alarms and outputting to an endpoint
- [terraform-aws-rds-cloudwatch-sns-alarms](https://github.com/cloudposse/terraform-aws-rds-cloudwatch-sns-alarms) - Terraform module that configures important RDS alerts using CloudWatch and sends them to an SNS topic
- [terraform-aws-sqs-cloudwatch-sns-alarms](https://github.com/cloudposse/terraform-aws-sqs-cloudwatch-sns-alarms) - Terraform module for creating alarms for SQS and notifying endpoints
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## ✨ Contributing
This project is under active development, and we encourage contributions from our community.
Many thanks to our outstanding contributors:
For 🐛 bug reports & feature requests, please use the [issue tracker](https://github.com/cloudposse/terraform-aws-cloudtrail-cloudwatch-alarms/issues).
In general, PRs are welcome. We follow the typical "fork-and-pull" Git workflow.
1. Review our [Code of Conduct](https://github.com/cloudposse/terraform-aws-cloudtrail-cloudwatch-alarms/?tab=coc-ov-file#code-of-conduct) and [Contributor Guidelines](https://github.com/cloudposse/.github/blob/main/CONTRIBUTING.md).
2. **Fork** the repo on GitHub
3. **Clone** the project to your own machine
4. **Commit** changes to your own branch
5. **Push** your work back up to your fork
6. Submit a **Pull Request** so that we can review your changes
**NOTE:** Be sure to merge the latest changes from "upstream" before making a pull request!
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Join our [Open Source Community](https://cpco.io/slack?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-cloudtrail-cloudwatch-alarms&utm_content=slack) on Slack. It's **FREE** for everyone! Our "SweetOps" community is where you get to talk with others who share a similar vision for how to rollout and manage infrastructure. This is the best place to talk shop, ask questions, solicit feedback, and work together as a community to build totally *sweet* infrastructure.
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## License
Preamble to the Apache License, Version 2.0
Complete license is available in the [`LICENSE`](LICENSE) file.
```text
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you 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
https://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.
```
## Trademarks
All other trademarks referenced herein are the property of their respective owners.
---
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