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CircleCI Graceful Shutdown
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| # resource "aws_sqs_queue" "circleci_graceful_termination_autoscale" { | |
| # name = "circleci_graceful_termination_autoscale" | |
| # } | |
| resource "aws_lambda_permission" "with_sns" { | |
| statement_id = "AllowExecutionFromSNS" | |
| action = "lambda:InvokeFunction" | |
| function_name = "${aws_lambda_function.circleci_graceful_shutdown.function_name}" | |
| principal = "sns.amazonaws.com" | |
| source_arn = "${aws_sns_topic.circleci_graceful_termination_autoscale.arn}" | |
| } | |
| resource "aws_sns_topic" "circleci_graceful_termination_autoscale" { | |
| name = "circleci_graceful_termination_autoscale" | |
| } | |
| resource "aws_iam_role" "circleci_autoscaling_role" { | |
| name = "circleci_autoscaling_role" | |
| assume_role_policy = <<EOF | |
| { | |
| "Version": "2012-10-17", | |
| "Statement": [ | |
| { | |
| "Sid": "", | |
| "Effect": "Allow", | |
| "Principal": { | |
| "Service": ["autoscaling.amazonaws.com","lambda.amazonaws.com"] | |
| }, | |
| "Action": "sts:AssumeRole" | |
| } | |
| ] | |
| } | |
| EOF | |
| } | |
| resource "aws_iam_role_policy" "lifecycle_hook_autoscaling_policy" { | |
| name = "lifecycle_hook_autoscaling_policy" | |
| role = "${aws_iam_role.circleci_autoscaling_role.id}" | |
| policy = <<EOF | |
| { | |
| "Version": "2012-10-17", | |
| "Statement": [ | |
| { | |
| "Sid": "Stmt1436380187000", | |
| "Effect": "Allow", | |
| "Action": [ | |
| "sns:Publish" | |
| ], | |
| "Resource": [ | |
| "*" | |
| ] | |
| } | |
| ] | |
| } | |
| EOF | |
| } | |
| resource "aws_autoscaling_lifecycle_hook" "graceful_shutdown_asg_hook" { | |
| name = "graceful_shutdown_asg" | |
| autoscaling_group_name = "${aws_autoscaling_group.clients_asg[0].name}" | |
| default_result = "CONTINUE" | |
| heartbeat_timeout = 3600 | |
| lifecycle_transition = "autoscaling:EC2_INSTANCE_TERMINATING" | |
| notification_target_arn = "${aws_sns_topic.circleci_graceful_termination_autoscale.arn}" | |
| role_arn = "${aws_iam_role.circleci_autoscaling_role.arn}" | |
| } | |
| // Schedule Lifecycle Action | |
| resource "aws_autoscaling_schedule" "graceful_shutdown_action" { | |
| scheduled_action_name = "Nomad Graceful Shutdown Action" | |
| min_size = 0 | |
| max_size = 1 | |
| desired_capacity = 0 | |
| start_time = "2020-07-28T18:00:00Z" | |
| end_time = "2025-07-28T18:00:00Z" | |
| recurrence = "0 0 * * Fri" | |
| autoscaling_group_name = "${aws_autoscaling_group.clients_asg[0].name}" | |
| } | |
| resource "aws_lambda_function" "circleci_graceful_shutdown" { | |
| filename = "${path.root}/files/circleci-nomad-autoscaling.zip" | |
| function_name = "circleci-graceful-shutdown" | |
| role = "${aws_iam_role.circleci_autoscaling_role.arn}" | |
| handler = "index.handler" | |
| # The filebase64sha256() function is available in Terraform 0.11.12 and later | |
| # For Terraform 0.11.11 and earlier, use the base64sha256() function and the file() function: | |
| # source_code_hash = "${base64sha256(file("circleci-nomad-autoscaling.zip"))}" | |
| source_code_hash = "${filebase64sha256("${path.root}/files/circleci-nomad-autoscaling.zip")}" | |
| runtime = "nodejs12.x" | |
| environment { | |
| variables = { | |
| s3_bucket = "circleci-bucket" | |
| region = "us-east-2" | |
| } | |
| } | |
| } | |
| resource "aws_sns_topic_subscription" "circleci_graceful_termination_subscription" { | |
| topic_arn = "${aws_sns_topic.circleci_graceful_termination_autoscale.arn}" | |
| protocol = "lambda" | |
| endpoint = "${aws_lambda_function.circleci_graceful_shutdown.arn}" | |
| } | |
| output "sns_topic_arn" { | |
| value = "${aws_sns_topic.circleci_graceful_termination_autoscale.arn}" | |
| } |
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