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jitprovisioner.tf
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jitprovisioner.tf
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resource "aws_lb_listener_rule" "jitprovisioner" {
listener_arn = var.alb_listener.arn
priority = 100
action {
type = "forward"
target_group_arn = aws_lb_target_group.jitprovisioner.arn
}
condition {
host_header {
values = [var.base_domain]
}
}
}
resource "aws_lb_target_group_attachment" "jitprovisioner" {
target_group_arn = aws_lb_target_group.jitprovisioner.arn
target_id = aws_lambda_function.jitprovisioner.arn
depends_on = [aws_lambda_permission.jitprovisioner]
}
resource "aws_lambda_permission" "jitprovisioner" {
action = "lambda:InvokeFunction"
function_name = aws_lambda_function.jitprovisioner.arn
principal = "elasticloadbalancing.amazonaws.com"
source_arn = aws_lb_target_group.jitprovisioner.arn
}
resource "aws_lb_target_group" "jitprovisioner" {
name = "${local.full_name}-lambda"
target_type = "lambda"
lambda_multi_value_headers_enabled = true
}
data "aws_iam_policy_document" "lambda_assume_role" {
statement {
actions = ["sts:AssumeRole"]
principals {
type = "Service"
identifiers = ["lambda.amazonaws.com"]
}
}
}
resource "aws_iam_role" "jitprovisioner" {
name = "${var.prefix}-lambda"
assume_role_policy = data.aws_iam_policy_document.lambda_assume_role.json
}
resource "aws_iam_role_policy_attachment" "jitprovisioner-ecr" {
role = aws_iam_role.jitprovisioner.name
policy_arn = "arn:aws:iam::aws:policy/AmazonEKSFargatePodExecutionRolePolicy"
}
resource "aws_iam_role_policy_attachment" "jitprovisioner-vpc" {
role = aws_iam_role.jitprovisioner.name
policy_arn = "arn:aws:iam::aws:policy/service-role/AWSLambdaVPCAccessExecutionRole"
}
resource "aws_iam_policy" "jitprovisioner" {
name = "${var.prefix}-jitprovisioner"
policy = data.aws_iam_policy_document.jitprovisioner.json
}
data "aws_iam_policy_document" "jitprovisioner" {
statement {
actions = [
"dynamodb:BatchGetItem",
"dynamodb:BatchWriteItem",
"dynamodb:ConditionCheckItem",
"dynamodb:PutItem",
"dynamodb:DescribeTable",
"dynamodb:DeleteItem",
"dynamodb:GetItem",
"dynamodb:Scan",
"dynamodb:Query",
"dynamodb:UpdateItem",
]
resources = [var.dynamodb_table.arn, "${var.dynamodb_table.arn}/*"]
}
statement {
actions = [ #tfsec:ignore:aws-iam-no-policy-wildcards
"kms:Encrypt*",
"kms:Decrypt*",
"kms:ReEncrypt*",
"kms:GenerateDataKey*",
"kms:Describe*"
]
resources = [var.kms_key.arn, var.mysql_secret_kms.arn]
}
statement {
actions = ["states:StartExecution"]
resources = [aws_sfn_state_machine.main.arn]
}
statement {
actions = ["states:DescribeExecution"]
resources = ["*"]
}
statement {
actions = [
"secretsmanager:GetResourcePolicy",
"secretsmanager:GetSecretValue",
"secretsmanager:DescribeSecret",
"secretsmanager:ListSecretVersionIds"
]
resources = [var.mysql_secret.arn]
}
statement {
actions = ["secretsmanager:ListSecrets"]
resources = ["*"]
}
}
resource "aws_iam_role_policy_attachment" "jitprovisioner" {
role = aws_iam_role.jitprovisioner.name
policy_arn = aws_iam_policy.jitprovisioner.arn
}
resource "aws_lambda_function" "jitprovisioner" {
# If the file is not in the current working directory you will need to include a
# path.module in the filename.
image_uri = docker_registry_image.jitprovisioner.name
package_type = "Image"
function_name = "${var.prefix}-lambda"
role = aws_iam_role.jitprovisioner.arn
reserved_concurrent_executions = -1
kms_key_arn = var.kms_key.arn
timeout = 5
memory_size = 512
vpc_config {
security_group_ids = [aws_security_group.jitprovisioner.id]
subnet_ids = var.vpc.private_subnets
}
tracing_config {
mode = "Active"
}
environment {
variables = {
DYNAMODB_LIFECYCLE_TABLE = var.dynamodb_table.id
LIFECYCLE_SFN = aws_sfn_state_machine.main.arn
FLEET_BASE_URL = "${var.base_domain}"
AUTHORIZATION_PSK = random_password.authorization.result
MYSQL_SECRET = var.mysql_secret.arn
}
}
}
module "jitprovisioner-lambda-warmer" {
source = "Nuagic/lambda-warmer/aws"
version = "3.0.1"
function_name = aws_lambda_function.jitprovisioner.function_name
function_arn = aws_lambda_function.jitprovisioner.arn
# This just needs to have a request to parse.
input = <<EOINPUT
{
"requestContext": {
"elb": {
"targetGroupArn": "arn:aws:elasticloadbalancing:us-east-2:123456789012:targetgroup/lambda-279XGJDqGZ5rsrHC2Fjr/49e9d65c45c6791a"
}
},
"httpMethod": "GET",
"path": "/health",
"queryStringParameters": {
"query": "1234ABCD"
},
"multiValueHeaders": {
"accept": ["text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8"],
"accept-encoding": ["gzip"],
"accept-language": ["en-US,en;q=0.9"],
"connection": ["keep-alive"],
"host": ["lambda-alb-123578498.us-east-2.elb.amazonaws.com"],
"upgrade-insecure-requests": ["1"],
"user-agent": ["Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36"],
"x-amzn-trace-id": ["Root=1-5c536348-3d683b8b04734faae651f476"],
"x-forwarded-for": ["72.12.164.125"],
"x-forwarded-port": ["80"],
"x-forwarded-proto": ["http"],
"x-imforwards": ["20"]
},
"body": "",
"isBase64Encoded": false
}
EOINPUT
}
resource "random_password" "authorization" {
length = 16
special = false
}
output "jitprovisioner" {
value = aws_lambda_function.jitprovisioner
}
resource "random_uuid" "jitprovisioner" {
keepers = {
lambda = data.archive_file.jitprovisioner.output_sha
}
}
# Use the local to make the trigger work.
locals {
fleet_tag = "v4.37.0"
}
resource "null_resource" "standard-query-library" {
triggers = {
# Trick this to run if the file doesn't exist or if tag changes.
# In the case it doesn't exist, this will say it needs to apply twice,
# so not truly idempotent, but as close as null_resource allows.
file_exists = fileexists("${path.module}/lambda/standard-query-library.yml") ? local.fleet_tag : timestamp()
}
provisioner "local-exec" {
working_dir = "${path.module}/../../../"
command = "git archive fleet-${local.fleet_tag} docs/01-Using-Fleet/standard-query-library/standard-query-library.yml | tar -xO docs/01-Using-Fleet/standard-query-library/standard-query-library.yml > infrastructure/sandbox/JITProvisioner/lambda/standard-query-library.yml"
}
}
data "archive_file" "jitprovisioner" {
type = "zip"
output_path = "${path.module}/.jitprovisioner.zip"
source_dir = "${path.module}/lambda"
depends_on = [
null_resource.standard-query-library
]
}
resource "docker_registry_image" "jitprovisioner" {
name = "${aws_ecr_repository.main.repository_url}:${data.git_repository.main.branch}-${random_uuid.jitprovisioner.result}"
keep_remotely = true
build {
context = "${path.module}/lambda/"
pull_parent = true
platform = "linux/amd64"
}
depends_on = [
null_resource.standard-query-library
]
}
resource "aws_security_group" "jitprovisioner" {
name = local.full_name
vpc_id = var.vpc.vpc_id
description = local.full_name
egress {
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
ipv6_cidr_blocks = ["::/0"]
}
}