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AWS Utils

Utilities and resources to build and deploy Gigigo projects on Amazon Web Services.

CloudFormation

project-env-2az-vpc.template & project-env-3az-vpc.template

Enter <Project>-<Env>-VPC as stack name, where:

  • <Project> matchs the ProjectName parameter value
  • <Env> matchs the Environment parameter value

Lambda

ecs_manage_services.py

Function to start and stop in a scheduled way all services belonging to an ECS cluster set through the ECS_CLUSTER environment variable.

When a start action is performed the service is scaled out to 1 service task, and in the same way, when a stop action is performed the service is scaled in to 0 service tasks.

IAM Role

Create an AWS IAM role, for example called ECS_Manage, with at least the following permission policies:

  • ECS-ManageServices-<YYYYMMDD> inline policy with the following JSON:

    {
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "Stmt1430150596000",
            "Effect": "Allow",
            "Action": [
                "ecs:ListServices",
                "ecs:DescribeServices",
                "ecs:UpdateService"
            ],
            "Resource": [
                "*"
            ]
        }
    ]
}

  • AWSLambdaBasicExecutionRole managed policy

And attach it to the Lambda function.

Environment variables

This function requires the following environment variable to be set for its correct execution:

  • ECS_CLUSTER => Cluster name whose services are to be started

Namely:

ECS_CLUSTER=<ecs_cluster_name>

Usage

The proper tags must be added to the ECS services in order to perform the start and/or stop actions based on the schedule set as the value of each tag.

The name of the tag is the action and the value is a cron expression, including numbers, ranges and enumerations. Some examples are:

Tag Name Tag Value Description
startService 30 6 1-5 Start the service at 6:30 UTC on business days
startService 0 7 1-7 Start the service at 7:00 UTC every day of the week
stopService 30 17 1-5 Stop the service at 17:30 UTC on business days
stopService 0 0 2-6 Stop the service at 0:00 UTC on business days

ecs_stop_services.py

Function to stop all services belonging to an ECS cluster set through the ECS_CLUSTER environment variable, scaling in each of them to 0 service tasks.

IAM Role

Create an AWS IAM role, for example called ECS_Manage, with at least the following permission policies:

  • ECS-ManageServices-<YYYYMMDD> inline policy with the following JSON:

    {
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "Stmt1430150596000",
            "Effect": "Allow",
            "Action": [
                "ecs:ListServices",
                "ecs:UpdateService"
            ],
            "Resource": [
                "*"
            ]
        }
    ]
}

  • AWSLambdaBasicExecutionRole managed policy

And attach it to the Lambda function.

Environment variables

This function requires the following environment variables to be set for its correct execution:

  • ECS_CLUSTER => Cluster name whose services are to be stopped
  • EXCLUDED_SERVICES => List of services to be excluded from being stopped

Namely:

ECS_CLUSTER=<ecs_cluster_name>
EXCLUDED_SERVICES=<ecs_service_1> <ecs_service_2> <ecs_service_3> ...

ecs_start_services.py

Function to start all services belonging to an ECS cluster set through the ECS_CLUSTER environment variable, scaling out each of them to 1 service tasks.

IAM Role

Create an AWS IAM role, for example called ECS_Manage, with at least the following permission policies:

  • ECS-ManageServices-<YYYYMMDD> inline policy with the following JSON:

    {
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "Stmt1430150596000",
            "Effect": "Allow",
            "Action": [
                "ecs:ListServices",
                "ecs:UpdateService"
            ],
            "Resource": [
                "*"
            ]
        }
    ]
}

  • AWSLambdaBasicExecutionRole managed policy

And attach it to the Lambda function.

Environment variables

This function requires the following environment variable to be set for its correct execution:

  • ECS_CLUSTER => Cluster name whose services are to be started

Namely:

ECS_CLUSTER=<ecs_cluster_name>

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