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Terraform module for creating alarms for tracking important changes and occurrences from ECS Services.

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<details> <summary><strong>Watch demo of using Atmos with Terraform</strong></summary> <img src="https://github.com/cloudposse/atmos/blob/master/docs/demo.gif?raw=true"/><br/> <i>Example of running <a href="https://atmos.tools"><code>atmos</code></a> to manage infrastructure from our <a href="https://atmos.tools/quick-start/">Quick Start</a> tutorial.</i> </detalis>

Usage

For a complete example, see examples/complete.

For automated tests of the complete example using bats and Terratest, see test.

module "ecs_cloudwatch_autoscaling" {
  source = "cloudposse/ecs-cloudwatch-autoscaling/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version     = "x.x.x"
  namespace             = "eg"
  stage                 = "staging"
  name                  = "app"
  service_name          = "eg-staging-example-service"
  cluster_name          = "eg-staging-example-cluster"
  min_capacity          = 1
  max_capacity          = 2
  scale_up_adjustment   = 1
  scale_up_cooldown     = 60
  scale_down_adjustment = -1
  scale_down_cooldown   = 300
}

[!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

For a complete usage example, see terraform-aws-ecs-web-app module.

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Requirements

NameVersion
<a name="requirement_terraform"></a> terraform>= 1
<a name="requirement_aws"></a> aws>= 3.0

Providers

NameVersion
<a name="provider_aws"></a> aws>= 3.0

Modules

NameSourceVersion
<a name="module_scale_down_label"></a> scale_down_labelcloudposse/label/null0.25.0
<a name="module_scale_up_label"></a> scale_up_labelcloudposse/label/null0.25.0
<a name="module_this"></a> thiscloudposse/label/null0.25.0

Resources

NameType
aws_appautoscaling_policy.downresource
aws_appautoscaling_policy.upresource
aws_appautoscaling_target.defaultresource

Inputs

NameDescriptionTypeDefaultRequired
<a name="input_additional_tag_map"></a> additional_tag_mapAdditional key-value pairs to add to each map in tags_as_list_of_maps. Not added to tags or id.<br/>This is for some rare cases where resources want additional configuration of tags<br/>and therefore take a list of maps with tag key, value, and additional configuration.map(string){}no
<a name="input_attributes"></a> attributesID element. Additional attributes (e.g. workers or cluster) to add to id,<br/>in the order they appear in the list. New attributes are appended to the<br/>end of the list. The elements of the list are joined by the delimiter<br/>and treated as a single ID element.list(string)[]no
<a name="input_cluster_name"></a> cluster_nameThe name of the ECS cluster where service is to be autoscaledstringn/ayes
<a name="input_context"></a> contextSingle object for setting entire context at once.<br/>See description of individual variables for details.<br/>Leave string and numeric variables as null to use default value.<br/>Individual variable settings (non-null) override settings in context object,<br/>except for attributes, tags, and additional_tag_map, which are merged.any<pre>{<br/> "additional_tag_map": {},<br/> "attributes": [],<br/> "delimiter": null,<br/> "descriptor_formats": {},<br/> "enabled": true,<br/> "environment": null,<br/> "id_length_limit": null,<br/> "label_key_case": null,<br/> "label_order": [],<br/> "label_value_case": null,<br/> "labels_as_tags": [<br/> "unset"<br/> ],<br/> "name": null,<br/> "namespace": null,<br/> "regex_replace_chars": null,<br/> "stage": null,<br/> "tags": {},<br/> "tenant": null<br/>}</pre>no
<a name="input_delimiter"></a> delimiterDelimiter to be used between ID elements.<br/>Defaults to - (hyphen). Set to "" to use no delimiter at all.stringnullno
<a name="input_descriptor_formats"></a> descriptor_formatsDescribe additional descriptors to be output in the descriptors output map.<br/>Map of maps. Keys are names of descriptors. Values are maps of the form<br/>{<br/> format = string<br/> labels = list(string)<br/>}<br/>(Type is any so the map values can later be enhanced to provide additional options.)<br/>format is a Terraform format string to be passed to the format() function.<br/>labels is a list of labels, in order, to pass to format() function.<br/>Label values will be normalized before being passed to format() so they will be<br/>identical to how they appear in id.<br/>Default is {} (descriptors output will be empty).any{}no
<a name="input_enabled"></a> enabledSet to false to prevent the module from creating any resourcesboolnullno
<a name="input_environment"></a> environmentID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT'stringnullno
<a name="input_id_length_limit"></a> id_length_limitLimit id to this many characters (minimum 6).<br/>Set to 0 for unlimited length.<br/>Set to null for keep the existing setting, which defaults to 0.<br/>Does not affect id_full.numbernullno
<a name="input_label_key_case"></a> label_key_caseControls the letter case of the tags keys (label names) for tags generated by this module.<br/>Does not affect keys of tags passed in via the tags input.<br/>Possible values: lower, title, upper.<br/>Default value: title.stringnullno
<a name="input_label_order"></a> label_orderThe order in which the labels (ID elements) appear in the id.<br/>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br/>You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present.list(string)nullno
<a name="input_label_value_case"></a> label_value_caseControls the letter case of ID elements (labels) as included in id,<br/>set as tag values, and output by this module individually.<br/>Does not affect values of tags passed in via the tags input.<br/>Possible values: lower, title, upper and none (no transformation).<br/>Set this to title and set delimiter to "" to yield Pascal Case IDs.<br/>Default value: lower.stringnullno
<a name="input_labels_as_tags"></a> labels_as_tagsSet of labels (ID elements) to include as tags in the tags output.<br/>Default is to include all labels.<br/>Tags with empty values will not be included in the tags output.<br/>Set to [] to suppress all generated tags.<br/>Notes:<br/> The value of the name tag, if included, will be the id, not the name.<br/> Unlike other null-label inputs, the initial setting of labels_as_tags cannot be<br/> changed in later chained modules. Attempts to change it will be silently ignored.set(string)<pre>[<br/> "default"<br/>]</pre>no
<a name="input_max_capacity"></a> max_capacityMaximum number of running instances of a Servicenumber2no
<a name="input_min_capacity"></a> min_capacityMinimum number of running instances of a Servicenumber1no
<a name="input_name"></a> nameID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.<br/>This is the only ID element not also included as a tag.<br/>The "name" tag is set to the full id string. There is no tag with the value of the name input.stringnullno
<a name="input_namespace"></a> namespaceID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally uniquestringnullno
<a name="input_regex_replace_chars"></a> regex_replace_charsTerraform regular expression (regex) string.<br/>Characters matching the regex will be removed from the ID elements.<br/>If not set, "/[^a-zA-Z0-9-]/" is used to remove all characters other than hyphens, letters and digits.stringnullno
<a name="input_scale_down_adjustment"></a> scale_down_adjustmentScaling adjustment to make during scale down eventnumber-1no
<a name="input_scale_down_cooldown"></a> scale_down_cooldownPeriod (in seconds) to wait between scale down eventsnumber300no
<a name="input_scale_up_adjustment"></a> scale_up_adjustmentScaling adjustment to make during scale up eventnumber1no
<a name="input_scale_up_cooldown"></a> scale_up_cooldownPeriod (in seconds) to wait between scale up eventsnumber60no
<a name="input_service_name"></a> service_nameThe name of the ECS Service to autoscalestringn/ayes
<a name="input_stage"></a> stageID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release'stringnullno
<a name="input_tags"></a> tagsAdditional tags (e.g. {'BusinessUnit': 'XYZ'}).<br/>Neither the tag keys nor the tag values will be modified by this module.map(string){}no
<a name="input_tenant"></a> tenantID element _(Rarely used, not included by default)_. A customer identifier, indicating who this instance of a resource is forstringnullno

Outputs

NameDescription
<a name="output_scale_down_policy_arn"></a> scale_down_policy_arnARN of the scale down policy
<a name="output_scale_up_policy_arn"></a> scale_up_policy_arnARN of the scale up policy
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Related Projects

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✨ Contributing

This project is under active development, and we encourage contributions from our community.

Many thanks to our outstanding contributors:

<a href="https://github.com/cloudposse/terraform-aws-ecs-cloudwatch-autoscaling/graphs/contributors"> <img src="https://contrib.rocks/image?repo=cloudposse/terraform-aws-ecs-cloudwatch-autoscaling&max=24" /> </a>

For πŸ› bug reports & feature requests, please use the issue tracker.

In general, PRs are welcome. We follow the typical "fork-and-pull" Git workflow.

  1. Review our Code of Conduct and Contributor Guidelines.
  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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License

<a href="https://opensource.org/licenses/Apache-2.0"><img src="https://img.shields.io/badge/License-Apache%202.0-blue.svg?style=for-the-badge" alt="License"></a>

<details> <summary>Preamble to the Apache License, Version 2.0</summary> <br/> <br/>

Complete license is available in the LICENSE file.

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.
</details>

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