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panic-button-on.tf
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panic-button-on.tf
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resource "aws_iam_role" "panic_button_on_execution" {
name = "${var.resource_names.prefix}${var.resource_names.separator}panic-button-on"
description = "Role for executing the bastion panic button switch off"
assume_role_policy = data.aws_iam_policy_document.panic_button_on_assume_role.json
force_detach_policies = true
tags = var.tags
}
data "aws_iam_policy_document" "panic_button_on_assume_role" {
statement {
actions = [
"sts:AssumeRole",
]
effect = "Allow"
principals {
identifiers = ["lambda.amazonaws.com"]
type = "Service"
}
}
}
data "aws_iam_policy_document" "panic_button_on" {
statement {
sid = "UpdateASG"
actions = ["autoscaling:UpdateAutoScalingGroup", "autoscaling:BatchDeleteScheduledAction"]
resources = [local.auto_scaling_group.arn]
effect = "Allow"
}
statement {
sid = "DescribeASG"
actions = ["autoscaling:DescribeScheduledActions"]
resources = ["*"]
effect = "Allow"
}
}
resource "aws_iam_policy" "panic_button_on" {
name = "${var.resource_names.prefix}${var.resource_names.separator}switch-on"
policy = data.aws_iam_policy_document.panic_button_on.json
tags = var.tags
}
resource "aws_iam_role_policy_attachment" "panic_button_on" {
role = aws_iam_role.panic_button_on_execution.name
policy_arn = aws_iam_policy.panic_button_on.arn
}
resource "aws_iam_role_policy_attachment" "panic_button_on_basic_execution" {
policy_arn = "arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole"
role = aws_iam_role.panic_button_on_execution.id
}
resource "aws_iam_role_policy_attachment" "panic_button_on_x_ray" {
policy_arn = "arn:aws:iam::aws:policy/AWSXRayDaemonWriteAccess"
role = aws_iam_role.panic_button_on_execution.id
}
data "archive_file" "panic_button_on_package" {
type = "zip"
source_file = local.panic_button_switch_on_lambda_source
output_path = "${path.root}/builds/${local.panic_button_switch_on_lambda_source_file_name}.zip"
}
resource "aws_lambda_function" "panic_button_on" {
architectures = ["arm64"]
description = "Start all bastion hosts immediately"
filename = data.archive_file.panic_button_on_package.output_path
source_code_hash = data.archive_file.panic_button_on_package.output_base64sha256
function_name = local.panic_button_switch_on_lambda_name
handler = "panic_button_switch_on.handler"
timeout = 30
memory_size = 256
package_type = "Zip"
publish = true
role = aws_iam_role.panic_button_on_execution.arn
runtime = "python3.9"
environment {
variables = {
AUTO_SCALING_GROUP_NAME = local.auto_scaling_group.name
AUTO_SCALING_GROUP_MIN_SIZE = local.auto_scaling_group.min_size
AUTO_SCALING_GROUP_MAX_SIZE = local.auto_scaling_group.max_size
AUTO_SCALING_GROUP_DESIRED_CAPACITY = local.auto_scaling_group.desired_capacity
LOG_LEVEL = "info"
}
}
tracing_config {
mode = "Active"
}
tags = var.tags
# otherwise the Lambda auto-creates the group which conflicts with Terraform
depends_on = [aws_cloudwatch_log_group.panic_button_on]
}
resource "aws_cloudwatch_log_group" "panic_button_on" {
name = "/aws/lambda/${local.panic_button_switch_on_lambda_name}"
retention_in_days = 3
kms_key_id = var.kms_key_arn
tags = var.tags
}