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cnm_responder-lambda.tf
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cnm_responder-lambda.tf
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# AWS Lambda function
resource "aws_lambda_function" "aws_lambda_cnm_responder" {
filename = "${path.module}/cnm_responder.zip"
function_name = "${var.prefix}-cnm-responder"
role = aws_iam_role.aws_lambda_execution_role.arn
handler = "cnm_responder.cnm_handler"
runtime = "python3.12"
source_code_hash = filebase64sha256("${path.module}/cnm_responder.zip")
timeout = 300
vpc_config {
subnet_ids = data.aws_subnets.private_application_subnets.ids
security_group_ids = data.aws_security_groups.vpc_default_sg.ids
}
file_system_config {
arn = data.aws_efs_access_point.fsap_cnm.arn
local_mount_path = "/mnt/data"
}
}
resource "aws_lambda_permission" "aws_lambda_cnm_responder_sns" {
statement_id = "AllowExecutionFromSNS"
action = "lambda:InvokeFunction"
function_name = aws_lambda_function.aws_lambda_cnm_responder.function_name
principal = "sns.amazonaws.com"
source_arn = data.aws_sns_topic.cnm_response.arn
}
# CNM Response topic subscription
resource "aws_sns_topic_subscription" "sns-topic" {
topic_arn = data.aws_sns_topic.cnm_response.arn
protocol = "lambda"
endpoint = aws_lambda_function.aws_lambda_cnm_responder.arn
}
# AWS Lambda role and policy
resource "aws_iam_role" "aws_lambda_execution_role" {
name = "${var.prefix}-lambda-cnm-responder-execution-role"
assume_role_policy = jsonencode({
"Version" : "2012-10-17",
"Statement" : [
{
"Effect" : "Allow",
"Principal" : {
"Service" : "lambda.amazonaws.com"
},
"Action" : "sts:AssumeRole"
}
]
})
permissions_boundary = "arn:aws:iam::${local.account_id}:policy/NGAPShRoleBoundary"
}
resource "aws_iam_role_policy_attachment" "aws_lambda_execution_role_policy_attach" {
role = aws_iam_role.aws_lambda_execution_role.name
policy_arn = aws_iam_policy.aws_lambda_execution_policy.arn
}
resource "aws_iam_policy" "aws_lambda_execution_policy" {
name = "${var.prefix}-lambda-cnm-responder-execution-policy"
description = "Write to CloudWatch logs, list and delete from S3."
policy = jsonencode({
"Version" : "2012-10-17",
"Statement" : [
{
"Sid" : "AllowCreatePutLogs",
"Effect" : "Allow",
"Action" : [
"logs:CreateLogGroup",
"logs:CreateLogStream",
"logs:PutLogEvents"
],
"Resource" : "arn:aws:logs:*:*:*"
},
{
"Sid" : "AllowVPCAccess",
"Effect" : "Allow",
"Action" : [
"ec2:CreateNetworkInterface"
],
"Resource" : concat([for subnet in data.aws_subnet.private_application_subnet : subnet.arn], ["arn:aws:ec2:${var.aws_region}:${local.account_id}:*/*"])
},
{
"Sid" : "AllowVPCDelete",
"Effect" : "Allow",
"Action" : [
"ec2:DeleteNetworkInterface"
],
"Resource" : "arn:aws:ec2:${var.aws_region}:${local.account_id}:*/*"
},
{
"Sid" : "AllowVPCDescribe",
"Effect" : "Allow",
"Action" : [
"ec2:DescribeNetworkInterfaces",
],
"Resource" : "*"
},
{
"Sid" : "AllowEFSAccess",
"Effect" : "Allow",
"Action" : [
"elasticfilesystem:ClientMount",
"elasticfilesystem:ClientWrite",
"elasticfilesystem:DescribeMountTargets"
],
"Resource" : "${data.aws_efs_access_point.fsap_cnm.file_system_arn}"
"Condition" : {
"StringEquals" : {
"elasticfilesystem:AccessPointArn" : "${data.aws_efs_access_point.fsap_cnm.arn}"
}
}
},
{
"Sid" : "AllowListBucket",
"Effect" : "Allow",
"Action" : [
"s3:ListBucket"
],
"Resource" : "${data.aws_s3_bucket.l2p_granules.arn}"
},
{
"Sid" : "AllowGetDeleteObject",
"Effect" : "Allow",
"Action" : [
"s3:DeleteObject"
],
"Resource" : "${data.aws_s3_bucket.l2p_granules.arn}/*"
},
{
"Sid" : "DescribeParameters",
"Effect" : "Allow",
"Action" : "ssm:DescribeParameters",
"Resource" : "*"
},
{
"Sid" : "GetParameter",
"Effect" : "Allow",
"Action" : [
"ssm:GetParameter*"
],
"Resource" : "${data.aws_ssm_parameter.edl_token.arn}"
},
{
"Sid" : "DecryptKey",
"Effect" : "Allow",
"Action" : [
"kms:DescribeKey",
"kms:Decrypt"
],
"Resource" : "${data.aws_kms_key.ssm_key.arn}"
},
{
"Sid" : "AllowPublishToTopic",
"Effect" : "Allow",
"Action" : [
"sns:Publish"
],
"Resource" : "${data.aws_sns_topic.batch_job_failure.arn}"
},
{
"Sid" : "AllowListTopics",
"Effect" : "Allow",
"Action" : [
"sns:ListTopics"
],
"Resource" : "*"
}
]
})
}