terraform-aws-ecs-alb-service-task

Terraform module to create an ECS Service for a web app (task), and an ALB target group to route requests.

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Usage

IMPORTANT: The master branch is used in source just as an example. In your code, do not pin to master because there may be breaking changes between releases. Instead pin to the release tag (e.g. ?ref=tags/x.y.z) of one of our latest releases.

For a complete example, see examples/complete.

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

  provider "aws" {
    region = var.region
  }

  module "label" {
    source     = "git::https://github.com/cloudposse/terraform-null-label.git?ref=tags/0.15.0"
    namespace  = var.namespace
    name       = var.name
    stage      = var.stage
    delimiter  = var.delimiter
    attributes = var.attributes
    tags       = var.tags
  }

  module "vpc" {
    source     = "git::https://github.com/cloudposse/terraform-aws-vpc.git?ref=tags/0.8.1"
    namespace  = var.namespace
    stage      = var.stage
    name       = var.name
    delimiter  = var.delimiter
    attributes = var.attributes
    cidr_block = var.vpc_cidr_block
    tags       = var.tags
  }

  module "subnets" {
    source               = "git::https://github.com/cloudposse/terraform-aws-dynamic-subnets.git?ref=tags/0.16.1"
    availability_zones   = var.availability_zones
    namespace            = var.namespace
    stage                = var.stage
    name                 = var.name
    attributes           = var.attributes
    delimiter            = var.delimiter
    vpc_id               = module.vpc.vpc_id
    igw_id               = module.vpc.igw_id
    cidr_block           = module.vpc.vpc_cidr_block
    nat_gateway_enabled  = true
    nat_instance_enabled = false
    tags                 = var.tags
  }

  resource "aws_ecs_cluster" "default" {
    name = module.label.id
    tags = module.label.tags
  }

  module "container_definition" {
    source                       = "git::https://github.com/cloudposse/terraform-aws-ecs-container-definition.git?ref=tags/0.21.0"
    container_name               = var.container_name
    container_image              = var.container_image
    container_memory             = var.container_memory
    container_memory_reservation = var.container_memory_reservation
    container_cpu                = var.container_cpu
    essential                    = var.container_essential
    readonly_root_filesystem     = var.container_readonly_root_filesystem
    environment                  = var.container_environment
    port_mappings                = var.container_port_mappings
    log_configuration            = var.container_log_configuration
  }

  module "ecs_alb_service_task" {
    source                             = "git::https://github.com/cloudposse/terraform-aws-ecs-alb-service-task.git?ref=master"
    namespace                          = var.namespace
    stage                              = var.stage
    name                               = var.name
    attributes                         = var.attributes
    delimiter                          = var.delimiter
    alb_security_group                 = module.vpc.vpc_default_security_group_id
    container_definition_json          = module.container_definition.json
    ecs_cluster_arn                    = aws_ecs_cluster.default.arn
    launch_type                        = var.ecs_launch_type
    vpc_id                             = module.vpc.vpc_id
    security_group_ids                 = [module.vpc.vpc_default_security_group_id]
    subnet_ids                         = module.subnets.public_subnet_ids
    tags                               = var.tags
    ignore_changes_task_definition     = var.ignore_changes_task_definition
    network_mode                       = var.network_mode
    assign_public_ip                   = var.assign_public_ip
    propagate_tags                     = var.propagate_tags
    health_check_grace_period_seconds  = var.health_check_grace_period_seconds
    deployment_minimum_healthy_percent = var.deployment_minimum_healthy_percent
    deployment_maximum_percent         = var.deployment_maximum_percent
    deployment_controller_type         = var.deployment_controller_type
    desired_count                      = var.desired_count
    task_memory                        = var.task_memory
    task_cpu                           = var.task_cpu
  }

The container_image in the container_definition module is the Docker image used to start a container.

The container_definition is a string of JSON-encoded container definitions. Normally, you would place only one container definition here as the example above demonstrates. However, there might be situations where more than one container per task is more appropriate such as optionally in Fargate or in other cases where sidecars may be required. With cloudposse/terraform-aws-ecs-container-definition multi-container task definitions can be created using:

module "ecs_alb_service_task" {
  ...
  container_definition_json = jsonencode([
    module.first_container.json_map_object,
    module.second_container.json_map_object,
  ])
  ...
}

Refer to the multiple definitions example in cloudposse/terraform-aws-ecs-container-definition for details on defining multiple definitions.

This string is passed directly to the Docker daemon. Images in the Docker Hub registry are available by default. Other repositories are specified with either repository-url/image:tag or repository-url/image@digest. Up to 255 letters (uppercase and lowercase), numbers, hyphens, underscores, colons, periods, forward slashes, and number signs are allowed. This parameter maps to Image in the Create a container section of the Docker Remote API and the IMAGE parameter of docker run.

When a new task starts, the Amazon ECS container agent pulls the latest version of the specified image and tag for the container to use. However, subsequent updates to a repository image are not propagated to already running tasks.

Images in Amazon ECR repositories can be specified by either using the full registry/repository:tag or registry/repository@digest. For example, 012345678910.dkr.ecr.<region-name>.amazonaws.com/<repository-name>:latest or 012345678910.dkr.ecr.<region-name>.amazonaws.com/<repository-name>@sha256:94afd1f2e64d908bc90dbca0035a5b567EXAMPLE.

Images in official repositories on Docker Hub use a single name (for example, ubuntu or mongo).

Images in other repositories on Docker Hub are qualified with an organization name (for example, amazon/amazon-ecs-agent).

Images in other online repositories are qualified further by a domain name (for example, quay.io/assemblyline/ubuntu).

For more info, see Container Definition.

Makefile Targets

Available targets:

  help                                Help screen
  help/all                            Display help for all targets
  help/short                          This help short screen

Requirements

Name	Version
terraform	>= 0.12
aws	>= 2.0
local	>= 1.3
null	>= 2.0
template	>= 2.0

Providers

Name	Version
aws	>= 2.0

Inputs

Name	Description	Type	Default	Required
alb_security_group	Security group of the ALB	`string`	`""`	no
assign_public_ip	Assign a public IP address to the ENI (Fargate launch type only). Valid values are `true` or `false`. Default `false`	`bool`	`false`	no
attributes	Additional attributes (_e.g._ "1")	`list(string)`	`[]`	no
capacity_provider_strategies	The capacity provider strategies to use for the service. See `capacity_provider_strategy` configuration block: https://www.terraform.io/docs/providers/aws/r/ecs_service.html#capacity_provider_strategy	list(object({ capacity_provider = string weight = number base = number }))	`[]`	no
container_definition_json	A string containing a JSON-encoded array of container definitions (`"[{ "name": "container1", ... }, { "name": "container2", ... }]"`). See https://docs.aws.amazon.com/AmazonECS/latest/APIReference/API_ContainerDefinition.html, https://github.com/cloudposse/terraform-aws-ecs-container-definition, or https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/ecs_task_definition#container_definitions	`string`	n/a	yes
container_port	The port on the container to allow via the ingress security group	`number`	`80`	no
delimiter	Delimiter between `namespace`, `stage`, `name` and `attributes`	`string`	`"-"`	no
deployment_controller_type	Type of deployment controller. Valid values are `CODE_DEPLOY` and `ECS`	`string`	`"ECS"`	no
deployment_maximum_percent	The upper limit of the number of tasks (as a percentage of `desired_count`) that can be running in a service during a deployment	`number`	`200`	no
deployment_minimum_healthy_percent	The lower limit (as a percentage of `desired_count`) of the number of tasks that must remain running and healthy in a service during a deployment	`number`	`100`	no
desired_count	The number of instances of the task definition to place and keep running	`number`	`1`	no
ecs_cluster_arn	The ARN of the ECS cluster where service will be provisioned	`string`	n/a	yes
ecs_load_balancers	A list of load balancer config objects for the ECS service; see `load_balancer` docs https://www.terraform.io/docs/providers/aws/r/ecs_service.html	list(object({ container_name = string container_port = number elb_name = string target_group_arn = string }))	`[]`	no
enable_all_egress_rule	A flag to enable/disable adding the all ports egress rule to the ECS security group	`bool`	`true`	no
enable_ecs_managed_tags	Specifies whether to enable Amazon ECS managed tags for the tasks within the service	`bool`	`false`	no
enable_icmp_rule	Specifies whether to enable ICMP on the security group	`bool`	`true`	no
enabled	Set to false to prevent the module from creating any resources	`bool`	`true`	no
environment	Environment, e.g. 'prod', 'staging', 'dev', 'pre-prod', 'UAT'	`string`	`""`	no
health_check_grace_period_seconds	Seconds to ignore failing load balancer health checks on newly instantiated tasks to prevent premature shutdown, up to 7200. Only valid for services configured to use load balancers	`number`	`0`	no
ignore_changes_task_definition	Whether to ignore changes in container definition and task definition in the ECS service	`bool`	`true`	no
launch_type	The launch type on which to run your service. Valid values are `EC2` and `FARGATE`	`string`	`"FARGATE"`	no
name	Name of the application	`string`	n/a	yes
namespace	Namespace (e.g. `eg` or `cp`)	`string`	`""`	no
network_mode	The network mode to use for the task. This is required to be `awsvpc` for `FARGATE` `launch_type`	`string`	`"awsvpc"`	no
nlb_cidr_blocks	A list of CIDR blocks to add to the ingress rule for the NLB container port	`list(string)`	`[]`	no
nlb_container_port	The port on the container to allow via the ingress security group	`number`	`80`	no
ordered_placement_strategy	Service level strategy rules that are taken into consideration during task placement. List from top to bottom in order of precedence. The maximum number of ordered_placement_strategy blocks is 5. See `ordered_placement_strategy` docs https://www.terraform.io/docs/providers/aws/r/ecs_service.html#ordered_placement_strategy-1	list(object({ type = string field = string }))	`[]`	no
permissions_boundary	A permissions boundary ARN to apply to the 3 roles that are created.	`string`	`""`	no
platform_version	The platform version on which to run your service. Only applicable for launch_type set to FARGATE. More information about Fargate platform versions can be found in the AWS ECS User Guide.	`string`	`"LATEST"`	no
propagate_tags	Specifies whether to propagate the tags from the task definition or the service to the tasks. The valid values are SERVICE and TASK_DEFINITION	`string`	`null`	no
proxy_configuration	The proxy configuration details for the App Mesh proxy. See `proxy_configuration` docs https://www.terraform.io/docs/providers/aws/r/ecs_task_definition.html#proxy-configuration-arguments	object({ type = string container_name = string properties = map(string) })	`null`	no
scheduling_strategy	The scheduling strategy to use for the service. The valid values are REPLICA and DAEMON. Note that Fargate tasks do not support the DAEMON scheduling strategy.	`string`	`"REPLICA"`	no
security_group_ids	Security group IDs to allow in Service `network_configuration`	`list(string)`	`[]`	no
service_placement_constraints	The rules that are taken into consideration during task placement. Maximum number of placement_constraints is 10. See `placement_constraints` docs https://www.terraform.io/docs/providers/aws/r/ecs_service.html#placement_constraints-1	list(object({ type = string expression = string }))	`[]`	no
service_registries	The service discovery registries for the service. The maximum number of service_registries blocks is 1. The currently supported service registry is Amazon Route 53 Auto Naming Service - `aws_service_discovery_service`; see `service_registries` docs https://www.terraform.io/docs/providers/aws/r/ecs_service.html#service_registries-1	list(object({ registry_arn = string port = number container_name = string container_port = number }))	`[]`	no
stage	Stage (e.g. `prod`, `dev`, `staging`)	`string`	`""`	no
subnet_ids	Subnet IDs	`list(string)`	n/a	yes
tags	Additional tags (_e.g._ { BusinessUnit : ABC })	`map(string)`	`{}`	no
task_cpu	The number of CPU units used by the task. If using `FARGATE` launch type `task_cpu` must match supported memory values (https://docs.aws.amazon.com/AmazonECS/latest/developerguide/task_definition_parameters.html#task_size)	`number`	`256`	no
task_exec_role_arn	The ARN of IAM role that allows the ECS/Fargate agent to make calls to the ECS API on your behalf	`string`	`""`	no
task_memory	The amount of memory (in MiB) used by the task. If using Fargate launch type `task_memory` must match supported cpu value (https://docs.aws.amazon.com/AmazonECS/latest/developerguide/task_definition_parameters.html#task_size)	`number`	`512`	no
task_placement_constraints	A set of placement constraints rules that are taken into consideration during task placement. Maximum number of placement_constraints is 10. See `placement_constraints` docs https://www.terraform.io/docs/providers/aws/r/ecs_task_definition.html#placement-constraints-arguments	list(object({ type = string expression = string }))	`[]`	no
task_role_arn	The ARN of IAM role that allows your Amazon ECS container task to make calls to other AWS services	`string`	`""`	no
use_alb_security_group	A flag to enable/disable adding the ingress rule to the ALB security group	`bool`	`false`	no
use_nlb_cidr_blocks	A flag to enable/disable adding the NLB ingress rule to the security group	`bool`	`false`	no
use_old_arn	A flag to enable/disable tagging the ecs resources that require the new arn format	`bool`	`false`	no
volumes	Task volume definitions as list of configuration objects	list(object({ host_path = string name = string docker_volume_configuration = list(object({ autoprovision = bool driver = string driver_opts = map(string) labels = map(string) scope = string })) efs_volume_configuration = list(object({ file_system_id = string root_directory = string transit_encryption = string transit_encryption_port = string authorization_config = list(object({ access_point_id = string iam = string })) })) }))	`[]`	no
vpc_id	The VPC ID where resources are created	`string`	n/a	yes

Outputs

Name	Description
ecs_exec_role_policy_id	The ECS service role policy ID, in the form of `role_name:role_policy_name`
ecs_exec_role_policy_name	ECS service role name
service_name	ECS Service name
service_role_arn	ECS Service role ARN
service_security_group_id	Security Group ID of the ECS task
task_definition_family	ECS task definition family
task_definition_revision	ECS task definition revision
task_exec_role_arn	ECS Task exec role ARN
task_exec_role_name	ECS Task role name
task_role_arn	ECS Task role ARN
task_role_id	ECS Task role id
task_role_name	ECS Task role name

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Related Projects

Check out these related projects.

terraform-aws-alb - Terraform module to provision a standard ALB for HTTP/HTTP traffic
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terraform-aws-codebuild - Terraform Module to easily leverage AWS CodeBuild for Continuous Integration
terraform-aws-ecr - Terraform Module to manage Docker Container Registries on AWS ECR
terraform-aws-ecs-web-app - Terraform module that implements a web app on ECS and supporting AWS resources
terraform-aws-ecs-codepipeline - Terraform Module for CI/CD with AWS Code Pipeline and Code Build for ECS
terraform-aws-ecs-cloudwatch-sns-alarms - Terraform module to create CloudWatch Alarms on ECS Service level metrics
terraform-aws-ecs-container-definition - Terraform module to generate well-formed JSON documents that are passed to the aws_ecs_task_definition Terraform resource
terraform-aws-lb-s3-bucket - Terraform module to provision an S3 bucket with built in IAM policy to allow AWS Load Balancers to ship access logs.

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Copyright

License

See LICENSE for full details.

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

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Contributors

Erik Osterman	Igor Rodionov	Andriy Knysh	Sarkis Varozian	Chris Weyl

Name		Name	Last commit message	Last commit date
Latest commit History 53 Commits
.github		.github
docs		docs
examples/complete		examples/complete
test		test
.gitignore		.gitignore
LICENSE		LICENSE
Makefile		Makefile
README.md		README.md
README.yaml		README.yaml
main.tf		main.tf
outputs.tf		outputs.tf
variables.tf		variables.tf
versions.tf		versions.tf

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