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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
https://github.com/cloudposse/terraform-aws-rds-cloudwatch-sns-alarms
alerts aws cloudwatch rds-alerts sns terraform terraform-module
Last synced: about 1 month ago
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Terraform module that configures important RDS alerts using CloudWatch and sends them to an SNS topic
- Host: GitHub
- URL: https://github.com/cloudposse/terraform-aws-rds-cloudwatch-sns-alarms
- Owner: cloudposse
- License: apache-2.0
- Created: 2018-05-30T13:36:41.000Z (over 6 years ago)
- Default Branch: main
- Last Pushed: 2024-09-19T03:07:29.000Z (about 2 months ago)
- Last Synced: 2024-09-27T19:01:18.671Z (about 2 months ago)
- Topics: alerts, aws, cloudwatch, rds-alerts, sns, terraform, terraform-module
- Language: HCL
- Homepage: https://cloudposse.com/accelerate
- Size: 2.07 MB
- Stars: 122
- Watchers: 22
- Forks: 102
- Open Issues: 12
-
Metadata Files:
- Readme: README.md
- License: LICENSE
- Codeowners: .github/CODEOWNERS
Awesome Lists containing this project
README
Terraform module that configures important RDS alerts using CloudWatch and sends them to an SNS topic.
Create a set of sane RDS CloudWatch alerts for monitoring the health of an RDS instance.
> [!TIP]
> #### 👽 Use Atmos with Terraform
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> Works with [Github Actions](https://atmos.tools/integrations/github-actions/), [Atlantis](https://atmos.tools/integrations/atlantis), or [Spacelift](https://atmos.tools/integrations/spacelift).
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## Usage
| area | metric | comparison operator | threshold | rationale |
|---------|------------------|----------------------|-----------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Storage | BurstBalance | `<` | 20 % | 20 % of credits allow you to burst for a few minutes which gives you enough time to a) fix the inefficiency, b) add capacity or c) switch to io1 storage type. |
| Storage | DiskQueueDepth | `>` | 64 | This number is calculated from our experience with RDS workloads. |
| Storage | FreeStorageSpace | `<` | 2 GB | 2 GB usually provides enough time to a) fix why so much space is consumed or b) add capacity. You can also modify this value to 10% of your database capacity. |
| CPU | CPUUtilization | `>` | 80 % | Queuing theory tells us the latency increases exponentially with utilization. In practice, we see higher latency when utilization exceeds 80% and unacceptable high latency with utilization above 90% |
| CPU | CPUCreditBalance | `<` | 20 | One credit equals 1 minute of 100% usage of a vCPU. 20 credits should give you enough time to a) fix the inefficiency, b) add capacity or c) don't use t2 type. |
| Memory | FreeableMemory | `<` | 64 MB | This number is calculated from our experience with RDS workloads. |
| Memory | SwapUsage | `>` | 256 MB | Sometimes you can not entirely avoid swapping. But once the database accesses paged memory, it will slow down. |
> [!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
See the [`examples/`](examples/) directory for working examples.
```hcl
resource "aws_db_instance" "default" {
allocated_storage = 10
storage_type = "gp2"
engine = "mysql"
engine_version = "5.7"
instance_class = "db.t2.micro"
identifier_prefix = "rds-server-example"
name = "mydb"
username = "foo"
password = "foobarbaz"
parameter_group_name = "default.mysql5.7"
apply_immediately = "true"
skip_final_snapshot = "true"
}
module "rds_alarms" {
source = "git::https://github.com/cloudposse/terraform-aws-rds-cloudwatch-sns-alarms.git?ref=tags/0.1.5"
db_instance_id = "${aws_db_instance.default.id}"
}
```
## Requirements
| Name | Version |
|------|---------|
| [terraform](#requirement\_terraform) | >= 0.13.0 |
| [aws](#requirement\_aws) | >= 2.0 |
## Providers
| Name | Version |
|------|---------|
| [aws](#provider\_aws) | >= 2.0 |
## Modules
| Name | Source | Version |
|------|--------|---------|
| [label](#module\_label) | cloudposse/label/null | 0.25.0 |
| [subscription\_label](#module\_subscription\_label) | cloudposse/label/null | 0.25.0 |
| [this](#module\_this) | cloudposse/label/null | 0.25.0 |
| [topic\_label](#module\_topic\_label) | cloudposse/label/null | 0.25.0 |
## Resources
| Name | Type |
|------|------|
| [aws_cloudwatch_metric_alarm.burst_balance_too_low](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/cloudwatch_metric_alarm) | resource |
| [aws_cloudwatch_metric_alarm.cpu_credit_balance_too_low](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/cloudwatch_metric_alarm) | resource |
| [aws_cloudwatch_metric_alarm.cpu_utilization_too_high](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/cloudwatch_metric_alarm) | resource |
| [aws_cloudwatch_metric_alarm.disk_queue_depth_too_high](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/cloudwatch_metric_alarm) | resource |
| [aws_cloudwatch_metric_alarm.free_storage_space_too_low](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/cloudwatch_metric_alarm) | resource |
| [aws_cloudwatch_metric_alarm.freeable_memory_too_low](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/cloudwatch_metric_alarm) | resource |
| [aws_cloudwatch_metric_alarm.swap_usage_too_high](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/cloudwatch_metric_alarm) | resource |
| [aws_db_event_subscription.default](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/db_event_subscription) | 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_topic_policy](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/iam_policy_document) | data source |
## Inputs
| Name | Description | Type | Default | Required |
|------|-------------|------|---------|:--------:|
| [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 |
| [burst\_balance\_threshold](#input\_burst\_balance\_threshold) | The minimum percent of General Purpose SSD (gp2) burst-bucket I/O credits available. | `number` | `20` | 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 |
| [cpu\_credit\_balance\_threshold](#input\_cpu\_credit\_balance\_threshold) | The minimum number of CPU credits (t2 instances only) available. | `number` | `20` | no |
| [cpu\_utilization\_threshold](#input\_cpu\_utilization\_threshold) | The maximum percentage of CPU utilization. | `number` | `80` | no |
| [db\_instance\_id](#input\_db\_instance\_id) | The instance ID of the RDS database instance that you want to monitor. | `string` | n/a | yes |
| [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 |
| [disk\_queue\_depth\_threshold](#input\_disk\_queue\_depth\_threshold) | The maximum number of outstanding IOs (read/write requests) waiting to access the disk. | `number` | `64` | 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 |
| [free\_storage\_space\_threshold](#input\_free\_storage\_space\_threshold) | The minimum amount of available storage space in Byte. | `number` | `2000000000` | no |
| [freeable\_memory\_threshold](#input\_freeable\_memory\_threshold) | The minimum amount of available random access memory in Byte. | `number` | `64000000` | 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 |
| [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 |
| [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 |
| [stage](#input\_stage) | ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |
| [swap\_usage\_threshold](#input\_swap\_usage\_threshold) | The maximum amount of swap space used on the DB instance in Byte. | `number` | `256000000` | 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 |
|------|-------------|
| [sns\_topic\_arn](#output\_sns\_topic\_arn) | The ARN of the SNS topic |
## Makefile Targets
```text
Available targets:
help Help screen
help/all Display help for all targets
help/short This help short screen
lint Lint terraform code
test/% Run Terraform commands in the examples/complete folder; e.g. make test/plan
```
## Related Projects
Check out these related projects.
- [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
- [terraform-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-sqs-cloudwatch-sns-alarms](https://github.com/cloudposse/terraform-aws-sqs-cloudwatch-sns-alarms) - Terraform module for creating alarms for SQS and notifying endpoints
> [!TIP]
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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-rds-cloudwatch-sns-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-rds-cloudwatch-sns-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!
### 🌎 Slack Community
Join our [Open Source Community](https://cpco.io/slack?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-rds-cloudwatch-sns-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.
---
Copyright © 2017-2024 [Cloud Posse, LLC](https://cpco.io/copyright)
