This Terraform Module creates an ECS Daemon Service
that you can use to deploy exactly one task on each active container instance that meets all of the task placement constraints
specified in your cluster.
How do you use this module?
See the root README for instructions on using Terraform modules.
See vars.tf for all the variables you can set on this module.
This module uses the ecs-deployment-check binary available
under
ecs-deploy-check-binaries to
have a more robust check for the service deployment. You
must have python installed before you can use this check.
See the binary README for
more information. You can disable the check by setting the
module variable enable_ecs_deployment_check to false.
What is an ECS Daemon Service?
To run Docker daemon containers with ECS, you first define an ECS
Task, which is a JSON file that
describes what container(s) to run, the resources (memory, CPU) those containers need, the volumes to mount, the
environment variables to set, and so on. To actually run an ECS Task, you define an ECS Daemon Service, which will:
Deploy exactly one task on each active container instance.
Restart tasks if they fail.
How do you create an ECS cluster?
To use ECS, you first deploy one or more EC2 Instances into a "cluster". See the ecs-cluster module
for how to create a cluster.
How do you add additional IAM policies?
If you associate this ECS Service with a single ELB, then we create an IAM Role and
associated IAM Policies that allow the ECS Service to talk to the ELB. To add additional IAM policies to this IAM Role,
you can use the aws_iam_role_policy or
aws_iam_policy_attachment resources, and
set the IAM role id to the Terraform output of this module called service_iam_role_id . For example, here is how
you can allow the ECS Service in this cluster to access an S3 bucket:
{"treedata":{"name":"root","toggled":true,"children":[{"name":".circleci","children":[{"name":"config.yml","path":".circleci/config.yml","sha":"313f5d0da760ea1c9f1a8d8389edd290ef48d283"}]},{"name":".gitignore","path":".gitignore","sha":"75a7f4fc360463f11aeaf0fd02f614df1856d06b"},{"name":".pre-commit-config.yaml","path":".pre-commit-config.yaml","sha":"e31702e7720944837d9fae2e2867cb473f80f372"},{"name":"CODEOWNERS","path":"CODEOWNERS","sha":"ecbeaab263c59e955b621268f161059633041e3d"},{"name":"LICENSE.txt","path":"LICENSE.txt","sha":"f4e3d9bd4717a044ed31ad847a300eee74371a78"},{"name":"README.adoc","path":"README.adoc","sha":"23da806f326a2987e6fe52280cd9e301d7b53c7d"},{"name":"_docs","children":[{"name":"ecs-architecture.png","path":"_docs/ecs-architecture.png","sha":"7caa9342bfc7ff5c74f26626a9831f22e914ff8e"},{"name":"ecs-fargate-service-icon.png","path":"_docs/ecs-fargate-service-icon.png","sha":"b8825b62a8b9170889c747320e1c79a9298c9bcb"},{"name":"ecs-icon.png","path":"_docs/ecs-icon.png","sha":"8ffdf43575d96d27ceced3d492871fa12403140e"},{"name":"ecs-service-architecture.png","path":"_docs/ecs-service-architecture.png","sha":"1bef2e6b95cb016b8e2c0219679d2d2d3ddd1769"},{"name":"ecs-service-icon.png","path":"_docs/ecs-service-icon.png","sha":"30947a9dcd3612d12ab42f40095b81a13fbaaff4"}]},{"name":"core-concepts.md","path":"core-concepts.md","sha":"816b25e1b3df74a01f2f564447c10b5ea5f5dd55"},{"name":"examples","children":[{"name":"deploy-ecs-task","children":[{"name":"README.md","path":"examples/deploy-ecs-task/README.md","sha":"5de7a89dc7a156f82c016fed690214711943bff6"},{"name":"containers","children":[{"name":"container-definitions.json","path":"examples/deploy-ecs-task/containers/container-definitions.json","sha":"1de2f83af666b622739f89debacc7c7faed35a08"}]},{"name":"main.tf","path":"examples/deploy-ecs-task/main.tf","sha":"8330cd508f1cdc0d55691636c353b43d0cfa0170"},{"name":"outputs.tf","path":"examples/deploy-ecs-task/outputs.tf","sha":"85a778d238b0c9114b80dc532258bf447b5adcd6"},{"name":"user-data","children":[{"name":"user-data.sh","path":"examples/deploy-ecs-task/user-data/user-data.sh","sha":"7b474fe788eb9581b91f5f58b0cc09d4201a2013"}]},{"name":"vars.tf","path":"examples/deploy-ecs-task/vars.tf","sha":"70a5be0fe5f10906076763b1ec4df79dccf68c34"}]},{"name":"docker-daemon-service","children":[{"name":"containers","children":[{"name":"datadog-agent-ecs.json","path":"examples/docker-daemon-service/containers/datadog-agent-ecs.json","sha":"7f8de1f4c5b716bab279112f14adf7f8dc0f6024"}]},{"name":"main.tf","path":"examples/docker-daemon-service/main.tf","sha":"94debf2a39df6e295d928c7895a581fb63d4de37"},{"name":"outputs.tf","path":"examples/docker-daemon-service/outputs.tf","sha":"2a294a1174fdc88601ebe62f9ab3dd4faf2d89fd"},{"name":"vars.tf","path":"examples/docker-daemon-service/vars.tf","sha":"820dd6293298357da998f1b34283b17d4d204b4f"}]},{"name":"docker-fargate-service-with-alb","children":[{"name":"README.md","path":"examples/docker-fargate-service-with-alb/README.md","sha":"e8754bd39b109b5b181f52596fbddef00302ea15"},{"name":"containers","children":[{"name":"container-definition.json","path":"examples/docker-fargate-service-with-alb/containers/container-definition.json","sha":"9091667150daa61c453f31975da897f735812c7c"}]},{"name":"main.tf","path":"examples/docker-fargate-service-with-alb/main.tf","sha":"85ba5553617956971b174dabe1de3ac6b7ba2a1f"},{"name":"outputs.tf","path":"examples/docker-fargate-service-with-alb/outputs.tf","sha":"f6b5bea9f779eaaa2b792f363657e7ba326b605e"},{"name":"vars.tf","path":"examples/docker-fargate-service-with-alb/vars.tf","sha":"e8c123e3392d9dcd093283d3b78caa1812655f65"}]},{"name":"docker-fargate-service-with-efs-volume","children":[{"name":"README.md","path":"examples/docker-fargate-service-with-efs-volume/README.md","sha":"ad85406d663a5f4429cf568ba13c781c6c0090fc"},{"name":"containers","children":[{"name":"container-definition.json","path":"examples/docker-fargate-service-with-efs-volume/containers/container-definition.json","sha":"0b6cb6d9e9ab8eec112e6120b6eb4def8c94ef35"}]},{"name":"main.tf","path":"examples/docker-fargate-service-with-efs-volume/main.tf","sha":"b99a32abd3399225d816715200ea68ffcbeb1a4e"},{"name":"outputs.tf","path":"examples/docker-fargate-service-with-efs-volume/outputs.tf","sha":"2a10149cd88dc1b73415185c4aaa3ade4bf879bb"},{"name":"vars.tf","path":"examples/docker-fargate-service-with-efs-volume/vars.tf","sha":"112e34fa0892d613126d7b7f5f4acd5d09fba0e1"}]},{"name":"docker-fargate-service-with-nlb","children":[{"name":"README.md","path":"examples/docker-fargate-service-with-nlb/README.md","sha":"d064e28aebebd7606143feb8e46584f8667c9136"},{"name":"containers","children":[{"name":"container-definition.json","path":"examples/docker-fargate-service-with-nlb/containers/container-definition.json","sha":"083fca39166d4b8f243e66cb96f6aa9fad72cbe6"}]},{"name":"main.tf","path":"examples/docker-fargate-service-with-nlb/main.tf","sha":"d5165219999482530d2a3dd46bdea08fc2743726"},{"nam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class=\"preview__body--title\" id=\"ecs-daemon-service-module\">ECS Daemon Service Module</h1><div class=\"preview__body--border\"></div><p>This Terraform Module creates an <a href=\"http://docs.aws.amazon.com/AmazonECS/latest/developerguide/ecs_services.html\" class=\"preview__body--description--blue\" target=\"_blank\">ECS Daemon Service</a>\nthat you can use to deploy exactly one task on each active container instance that meets all of the task placement constraints\nspecified in your cluster.</p>\n<h2 class=\"preview__body--subtitle\" id=\"how-do-you-use-this-module\">How do you use this module?</h2>\n<ul>\n<li>See the <a href=\"/repos/v0.28.2/module-ecs/README.adoc\" class=\"preview__body--description--blue\">root README</a> for instructions on using Terraform modules.</li>\n<li>See <a href=\"/repos/v0.28.2/module-ecs/modules/ecs-daemon-service/vars.tf\" class=\"preview__body--description--blue\">vars.tf</a> for all the variables you can set on this module.</li>\n<li>See the <a href=\"/repos/v0.28.2/module-ecs/modules/ecs-cluster\" class=\"preview__body--description--blue\">ecs-cluster module</a> for how to run an ECS cluster.</li>\n<li>This module uses the <code>ecs-deployment-check</code> binary available\nunder\n<a href=\"/repos/v0.28.2/module-ecs/modules/ecs-deploy-check-binaries\" class=\"preview__body--description--blue\">ecs-deploy-check-binaries</a> to\nhave a more robust check for the service deployment. You\nmust have <code>python</code> installed before you can use this check.\nSee the binary <a href=\"/repos/v0.28.2/module-ecs/modules/ecs-deploy-check-binaries\" class=\"preview__body--description--blue\">README</a> for\nmore information. You can disable the check by setting the\nmodule variable <code>enable_ecs_deployment_check</code> to <code>false</code>.</li>\n</ul>\n<h2 class=\"preview__body--subtitle\" id=\"what-is-an-ecs-daemon-service\">What is an ECS Daemon Service?</h2>\n<p>To run Docker daemon containers with ECS, you first define an <a href=\"http://docs.aws.amazon.com/AmazonECS/latest/developerguide/task_defintions.html\" class=\"preview__body--description--blue\" target=\"_blank\">ECS\nTask</a>, which is a JSON file that\ndescribes what container(s) to run, the resources (memory, CPU) those containers need, the volumes to mount, the\nenvironment variables to set, and so on. To actually run an ECS Task, you define an ECS Daemon Service, which will:</p>\n<ol>\n<li>Deploy exactly one task on each active container instance.</li>\n<li>Restart tasks if they fail.</li>\n</ol>\n<h2 class=\"preview__body--subtitle\" id=\"how-do-you-create-an-ecs-cluster\">How do you create an ECS cluster?</h2>\n<p>To use ECS, you first deploy one or more EC2 Instances into a "cluster". See the <a href=\"/repos/v0.28.2/module-ecs/modules/ecs-cluster\" class=\"preview__body--description--blue\">ecs-cluster module</a>\nfor how to create a cluster.</p>\n<h2 class=\"preview__body--subtitle\" id=\"how-do-you-add-additional-iam-policies\">How do you add additional IAM policies?</h2>\n<p>If you associate this ECS Service with a single ELB, then we create an IAM Role and\nassociated IAM Policies that allow the ECS Service to talk to the ELB. To add additional IAM policies to this IAM Role,\nyou can use the <a href=\"https://www.terraform.io/docs/providers/aws/r/iam_role_policy.html\" class=\"preview__body--description--blue\" target=\"_blank\">aws_iam_role_policy</a> or\n<a href=\"https://www.terraform.io/docs/providers/aws/r/iam_policy_attachment.html\" class=\"preview__body--description--blue\" target=\"_blank\">aws_iam_policy_attachment</a> resources, and\nset the IAM role id to the Terraform output of this module called <code>service_iam_role_id</code> . For example, here is how\nyou can allow the ECS Service in this cluster to access an S3 bucket:</p>\n<pre>module <span class=\"hljs-string\">\"ecs_daemon_service\"</span> {\n # (arguments omitted)\n}\n<span class=\"hljs-built_in\">\nresource </span><span class=\"hljs-string\">\"aws_iam_role_policy\"</span> <span class=\"hljs-string\">\"access_s3_bucket\"</span> {\n name = <span class=\"hljs-string\">\"access_s3_bucket\"</span>\n role = <span class=\"hljs-string\">\"<span class=\"hljs-variable\">${module.ecs_daemon_service.service_iam_role_arn}</span>\"</span>\n <span class=\"hljs-built_in\"> policy </span>= <<EOF\n{\n <span class=\"hljs-string\">\"Version\"</span>: <span class=\"hljs-string\">\"2012-10-17\"</span>,\n <span class=\"hljs-string\">\"Statement\"</span>: [\n {\n <span class=\"hljs-string\">\"Sid\"</span>: <span class=\"hljs-string\">\"\"</span>,\n <span class=\"hljs-string\">\"Effect\"</span>:<span class=\"hljs-string\">\"Allow\"</span>,\n <span class=\"hljs-string\">\"Action\"</span>: <span class=\"hljs-string\">\"s3:GetObject\"</span>,\n <span class=\"hljs-string\">\"Resource\"</span>: <span class=\"hljs-string\">\"arn:aws:s3:::examplebucket/*\"</span>\n }\n ]\n}\nEOF\n}\n</pre>\n","repoName":"module-ecs","repoRef":"v0.29.0","serviceDescriptor":{"serviceName":"ECS Service","serviceRepoName":"module-ecs","serviceRepoOrg":"gruntwork-io","serviceMainReadmePath":"/modules/ecs-service-with-alb","cloudProviders":["aws"],"description":"Deploy an ECS service with zero-downtime, rolling deployment, IAM Role, auto scaling, and more.","imageUrl":"ecs.png","licenseType":"subscriber","technologies":["Terraform","Python"],"compliance":[],"tags":[""]},"serviceCategoryName":"Docker services","fileName":"README.md","filePath":"/modules/ecs-daemon-service","title":"Repo Browser: ECS Service","description":"Browse the repos in the Gruntwork Infrastructure as Code Library."}
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