diff options
Diffstat (limited to 'terraform')
| -rw-r--r-- | terraform/events.tf | 91 | ||||
| -rw-r--r-- | terraform/iam.tf | 158 | ||||
| -rw-r--r-- | terraform/lambda.tf | 83 | ||||
| -rw-r--r-- | terraform/main.tf | 26 | ||||
| -rw-r--r-- | terraform/s3.tf | 14 | ||||
| -rw-r--r-- | terraform/vars.tf | 33 |
6 files changed, 405 insertions, 0 deletions
diff --git a/terraform/events.tf b/terraform/events.tf new file mode 100644 index 0000000..263141f --- /dev/null +++ b/terraform/events.tf @@ -0,0 +1,91 @@ +resource "random_string" "eventbridge_suffix" { + length = 8 + special = false + upper = false +} + +resource "random_string" "s3_ingestion_suffix" { + length = 8 + special = false + upper = false +} + +resource "random_string" "s3_transform_suffix" { + length = 8 + special = false + upper = false +} + +resource "aws_cloudwatch_event_rule" "lambda_trigger" { + name = "lambda-scheduled-trigger" + description = "Schedule to trigger the Lambda function" + schedule_expression = "rate(30 minutes)" +} + +resource "aws_cloudwatch_event_target" "extract_lambda_cw_event" { + rule = aws_cloudwatch_event_rule.lambda_trigger.name + target_id = "TargetFunctionV1" + arn = aws_lambda_function.extract_lambda.arn #replaced lambda name placeholder + depends_on = [aws_lambda_permission.allow_eventbridge] +} + +resource "aws_lambda_permission" "allow_eventbridge" { + statement_id = "AllowExecutionFromEventBridge${random_string.eventbridge_suffix.result}" + action = "lambda:InvokeFunction" + function_name = aws_lambda_function.extract_lambda.function_name + principal = "events.amazonaws.com" + source_arn = aws_cloudwatch_event_rule.lambda_trigger.arn + + lifecycle { + replace_triggered_by = [random_string.eventbridge_suffix] + } +} + +# below is step function 1 +resource "aws_lambda_permission" "allow_s3_ingestion" { + statement_id = "AllowS3InvokeLambdaTransform${random_string.s3_ingestion_suffix.result}" + action = "lambda:InvokeFunction" + function_name = aws_lambda_function.transform_lambda.function_name #replaced lambda name placeholder + principal = "s3.amazonaws.com" + source_arn = aws_s3_bucket.extract_bucket.arn #replaced bucket name placeholder + + lifecycle { + replace_triggered_by = [random_string.s3_ingestion_suffix] + } +} + + +resource "aws_s3_bucket_notification" "extract_bucket_notification" { + bucket = aws_s3_bucket.extract_bucket.id #replaced bucket name placeholder + + lambda_function { + events = ["s3:ObjectCreated:*"] + lambda_function_arn = aws_lambda_function.transform_lambda.arn #replaced lambda name placeholder + } + + depends_on = [aws_lambda_permission.allow_s3_ingestion] +} + +resource "aws_lambda_permission" "allow_s3_transform_bucket" { + statement_id = "AllowS3InvokeLambdaTransform${random_string.s3_transform_suffix.result}" + action = "lambda:InvokeFunction" + function_name = aws_lambda_function.transform_lambda.function_name #replaced lambda name placeholder + principal = "s3.amazonaws.com" + source_arn = aws_s3_bucket.transform_bucket.arn #replaced bucket name placeholder + + lifecycle { + replace_triggered_by = [random_string.s3_transform_suffix] + } +} + + +resource "aws_s3_bucket_notification" "transform_bucket_notification" { + bucket = aws_s3_bucket.transform_bucket.id #replaced bucket name placeholder + + lambda_function { + events = ["s3:ObjectCreated:*"] + lambda_function_arn = aws_lambda_function.transform_lambda.arn #replaced lambda name placeholder + } + + depends_on = [aws_lambda_permission.allow_s3_transform_bucket] +} diff --git a/terraform/iam.tf b/terraform/iam.tf new file mode 100644 index 0000000..0e5fa6d --- /dev/null +++ b/terraform/iam.tf @@ -0,0 +1,158 @@ +# Description: This file contains the IAM roles and policies for the lambda functions +######################################################################## +# IAM MULTI-ROLE SETUP +######################################################################## + +# DEFINE MULTI-SERVICE ROLE (lambda, s3, cloudwatch, events) +resource "aws_iam_role" "multi_service_role" { + name = "multi_service_role" + + assume_role_policy = jsonencode({ + Version = "2012-10-17" + Statement = [ + { + Action = "sts:AssumeRole" + Effect = "Allow" + Principal = { + Service = [ + "lambda.amazonaws.com", + "scheduler.amazonaws.com" + ] + } + } + ] + }) +} + + +######################################################################## +# S3 SETUP +# Description: allows allows retention/tagging/access control settings +# Lambda IAM Policy for S3 Write +######################################################################## + +# S3 DEFINE POLICY +data "aws_iam_policy_document" "s3_data_policy_doc" { + statement { + actions = [ + "s3:PutObject", + "s3:PutObjectRetention", + "s3:PutObjectTagging", + "s3:PutObjectAcl" + ] + resources = [ + "${aws_s3_bucket.extract_bucket.arn}/*", + "${aws_s3_bucket.transform_bucket.arn}/*", + "${aws_s3_bucket.lambda_code_bucket.arn}/*", + ] + } +} + + +######################################################################## +# LAMBDA SETUP +# Description: Allows Lambda permission to write to Cloudwatch logs +######################################################################## + +resource "aws_iam_policy" "lambda_execution_policy" { + name = "lambda_execution_policy" + path = "/" + description = "IAM policy for Lambda execution" + + policy = jsonencode({ + Version = "2012-10-17" + Statement = [ + { + Effect = "Allow" + Action = [ + "lambda:InvokeFunction", + "lambda:GetFunction" + ] + Resource = "*" + } + ] + } + ) +} + +######################################################################## +# CLOUDWATCH SETUP +# Description: Give permission for Lambda to write to CloudWatch logs +######################################################################## + +data "aws_iam_policy_document" "cw_document" { + statement { + actions = ["logs:CreateLogGroup"] + resources = [ + "arn:aws:logs:${data.aws_region.current.name}:${data.aws_caller_identity.current.account_id}:*" + ] + } + + statement { + actions = [ + "logs:CreateLogStream", + "logs:CreateLogGroup", + "logs:PutLogEvents" + ] + resources = [ + "arn:aws:logs:${data.aws_region.current.name}:${data.aws_caller_identity.current.account_id}:log-group:/aws/lambda/*" + ] + } +} + +resource "aws_iam_policy" "cw_policy" { + name = "cw_policy" + policy = data.aws_iam_policy_document.cw_document.json +} + +######################################################################## +# POLICY WRITE & ATTACH +######################################################################## + +# S3 WRITE POLICY +resource "aws_iam_policy" "s3_write_policy" { + policy = data.aws_iam_policy_document.s3_data_policy_doc.json +} + +resource "aws_iam_role_policy_attachment" "s3_attachment" { + role = aws_iam_role.multi_service_role.name + policy_arn = aws_iam_policy.s3_write_policy.arn +} + +resource "aws_iam_role_policy_attachment" "lambda_attachment" { + role = aws_iam_role.multi_service_role.name + policy_arn = aws_iam_policy.lambda_execution_policy.arn +} + +resource "aws_iam_role_policy_attachment" "cw_attachment" { + role = aws_iam_role.multi_service_role.name + policy_arn = aws_iam_policy.cw_policy.arn +} + +################### +# EVENTS POLICIES # +################### + +data "aws_iam_policy_document" "cloudwatch_events_policy" { + statement { + actions = [ + "events:PutRule", + "events:PutTargets", + "events:RemoveTargets", + "events:DeleteRule", + "events:PutEvents" + ] + resources = ["*"] + effect = "Allow" + } +} + +resource "aws_iam_policy" "cloudwatch_events_policy" { + name = "cloudwatch_events_policy" + policy = data.aws_iam_policy_document.cloudwatch_events_policy.json +} + +resource "aws_iam_role_policy_attachment" "cloudwatch_events_attachment" { + role = aws_iam_role.multi_service_role.name + policy_arn = aws_iam_policy.cloudwatch_events_policy.arn +} diff --git a/terraform/lambda.tf b/terraform/lambda.tf new file mode 100644 index 0000000..72d1306 --- /dev/null +++ b/terraform/lambda.tf @@ -0,0 +1,83 @@ +# Extract Lambda Function +data "archive_file" "extract_lambda_zip" { + type = "zip" + source_file = "${path.module}/../src/extract_lambda.py" + output_path = "${path.module}/../extract_function.zip" +} +resource "aws_s3_object" "extract_lambda_code" { + bucket = aws_s3_bucket.lambda_code_bucket.bucket + key = "${var.extract_lambda_name}/extract_function.zip" + source = data.archive_file.extract_lambda_zip.output_path + etag = filemd5(data.archive_file.extract_lambda_zip.output_path) +} + +resource "aws_lambda_function" "extract_lambda" { + function_name = var.extract_lambda_name + s3_bucket = aws_s3_bucket.lambda_code_bucket.bucket + s3_key = aws_s3_object.extract_lambda_code.key + role = aws_iam_role.multi_service_role.arn + handler = "extract_lambda.extract" + runtime = "python3.11" + + lifecycle { + create_before_destroy = true + } + + depends_on = [aws_s3_object.extract_lambda_code] +} + +# Transform Lambda Function +data "archive_file" "transform_lambda_zip" { + type = "zip" + source_file = "${path.module}/../src/transform_lambda.py" + output_path = "${path.module}/../transform_function.zip" +} +resource "aws_s3_object" "transform_lambda_code" { + bucket = aws_s3_bucket.lambda_code_bucket.bucket + key = "${var.transform_lambda_name}/transform_function.zip" + source = data.archive_file.transform_lambda_zip.output_path + etag = filemd5(data.archive_file.transform_lambda_zip.output_path) +} + +resource "aws_lambda_function" "transform_lambda" { + function_name = var.transform_lambda_name + s3_bucket = aws_s3_bucket.lambda_code_bucket.bucket + s3_key = aws_s3_object.transform_lambda_code.key + role = aws_iam_role.multi_service_role.arn + handler = "transform_lambda.transform" + runtime = "python3.11" + + lifecycle { + create_before_destroy = true + } + + depends_on = [aws_s3_object.transform_lambda_code] +} + +# Load Lambda Function +data "archive_file" "load_lambda_zip" { + type = "zip" + source_file = "${path.module}/../src/load_lambda.py" + output_path = "${path.module}/../load_function.zip" +} +resource "aws_s3_object" "load_lambda_code" { + bucket = aws_s3_bucket.lambda_code_bucket.bucket + key = "${var.load_lambda_name}/load_function.zip" + source = data.archive_file.load_lambda_zip.output_path + etag = filemd5(data.archive_file.load_lambda_zip.output_path) +} + +resource "aws_lambda_function" "load_lambda" { + function_name = var.load_lambda_name + s3_bucket = aws_s3_bucket.lambda_code_bucket.bucket + s3_key = aws_s3_object.load_lambda_code.key + role = aws_iam_role.multi_service_role.arn + handler = "load_lambda.load" + runtime = "python3.11" + + lifecycle { + create_before_destroy = true + } + + depends_on = [aws_s3_object.load_lambda_code] +} diff --git a/terraform/main.tf b/terraform/main.tf new file mode 100644 index 0000000..3b06701 --- /dev/null +++ b/terraform/main.tf @@ -0,0 +1,26 @@ +terraform { + required_providers { + aws = { + source = "hashicorp/aws" + version = "~>5.0" + } + } + backend "s3" { + bucket = "bentley-project-secrets" + key = "bentley-project/terraform.tfstate" + region = "eu-west-2" + } +} + +provider "aws" { + region = "eu-west-2" + default_tags { + tags = { + ProjectName = "Terrific-Totes" + Team = "Team-Bentley" + Environment = "Dev" + GitHubRepo = "de-project-bentley" + ManagedBy = "Terraform" + } + } +} diff --git a/terraform/s3.tf b/terraform/s3.tf new file mode 100644 index 0000000..d5cdee3 --- /dev/null +++ b/terraform/s3.tf @@ -0,0 +1,14 @@ +### EXTRACT BUCKET SET-UP +resource "aws_s3_bucket" "extract_bucket" { + bucket_prefix = "${var.s3_extract_bucket_name}-" +} + +### TRANSFORM BUCKET SET-UP +resource "aws_s3_bucket" "transform_bucket" { + bucket_prefix = "${var.s3_transform_bucket_name}-" +} + +### LAMBDA BUCKET +resource "aws_s3_bucket" "lambda_code_bucket" { + bucket_prefix = "${var.s3_code_bucket_name}-" +} diff --git a/terraform/vars.tf b/terraform/vars.tf new file mode 100644 index 0000000..84824ce --- /dev/null +++ b/terraform/vars.tf @@ -0,0 +1,33 @@ +variable "s3_extract_bucket_name" { + type = string + default = "extract-bucket" +} + +variable "s3_transform_bucket_name" { + type = string + default = "transform-bucket" +} + +variable "s3_code_bucket_name" { + type = string + default = "lambda-bucket" +} + +variable "extract_lambda_name" { + type = string + default = "extract-lambda" +} + +variable "transform_lambda_name" { + type = string + default = "transform-lambda" +} + +variable "load_lambda_name" { + type = string + default = "load-lambda" +} + +data "aws_caller_identity" "current" {} + +data "aws_region" "current" {} |