1 files changed, 128 insertions, 0 deletions
diff --git a/terraform/iam.tf b/terraform/iam.tf
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+# 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" "bentley_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",
+            "states.amazonaws.com",
+            "events.amazonaws.com",
+            "s3.amazonaws.com"
+          ]
+        }
+      }
+    ]
+  })
+}
+
+
+
+########################################################################
+# S3 SETUP                                                        
+# Description: allows allows retention/tagging/access control settings
+# Lambda IAM Policy for S3 Write
+########################################################################
+
+# S3 DEFINE POLICY
+resource "aws_iam_policy" "s3_access_policy" {
+  name        = "s3_access_policy"
+  path        = "/"
+  description = "IAM policy for S3 access"
+
+  policy = jsonencode({
+    Version = "2012-10-17"
+    Statement = [
+      {
+        Effect = "Allow"
+        Action = [
+          "s3:PutObject",
+          "s3:GetObject",
+          "s3:ListBucket"
+        ]
+        resources = [
+          "${aws_s3_bucket.extract_bucket.arn}/*",
+          "${aws_s3_bucket.transform_bucket.arn}/*",
+          "${aws_s3_bucket.lambda_bucket.arn}/*"
+          ]
+        }
+      ] 
+    }
+  )
+}
+
+########################################################################
+# LAMBDA SETUP
+# Description: Allows Lambda permission to write to Cloudwatch logs
+########################################################################
+
+resource "aws_iam_policy" "lambda_execution_policy" {
+  name = "lambda_execution_policy"
+  path = "/"
+  description = "IAM policy for Lambda execution"
+
+  policy = jsonencode({
+    Version = "2012-10-17"
+    Statement = [
+        {
+        Effect = "Allow"
+        Action = [
+          "lambda:InvokeFunction",
+          "lambda:GetFunction"
+        ]
+        Resource = "*"
+        }
+      ]
+    }
+  )
+}
+
+########################################################################
+# CLOUDWATCH SETUP
+# Description: Give permission for Lambda to write to CloudWatch logs
+########################################################################
+
+data "aws_iam_policy_document" "cw_document" {
+  statement {
+    actions = ["logs:CreateLogGroup"]
+    resources = [
+      "arn:aws:logs:${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/*"
+      ]
+  }
+}
+
+########################################################################
+# POLICY WRITE & ATTACH
+########################################################################
+
+# S3 WRITE POLICY
+resource "aws_iam_policy" "s3_write_policy" {
+  policy = data.aws_iam_policy_document.s3_data_policy_doc.json
+}
+
+# S3 ATTACH POLICY
+resource "aws_iam_role_policy_attachment" "lambda_s3_policy_attachment" {
+  role       = aws_iam_role.lambda_role.name
+  policy_arn = aws_iam_policy.s3_write_policy.arn
+}
+\ No newline at end of file