Setup s3 access at ec2 level

terraform/argocd.tf

@@ -19,10 +19,6 @@ resource "aws_secretsmanager_secret_version" "dumpnet" {
       talosconfig           = data.talos_client_configuration.this.talos_config
       kubeconfig            = talos_cluster_kubeconfig.this.kubeconfig_raw
     }
-    fluentbit = {
-      aws_access_key_id     = aws_iam_access_key.fluentbit.id
-      aws_secret_access_key = aws_iam_access_key.fluentbit.secret
-    }
   })
 }
 

terraform/iam.tf

@@ -0,0 +1,41 @@
+# IAM role for the EC2 node
+# Grants the node (and all pods on it) access to AWS services via instance metadata.
+# Add policies here as new services need AWS access.
+
+resource "aws_iam_role" "node" {
+  name = "${var.cluster_name}-node"
+
+  assume_role_policy = jsonencode({
+    Version = "2012-10-17"
+    Statement = [{
+      Effect    = "Allow"
+      Principal = { Service = "ec2.amazonaws.com" }
+      Action    = "sts:AssumeRole"
+    }]
+  })
+}
+
+resource "aws_iam_instance_profile" "node" {
+  name = "${var.cluster_name}-node"
+  role = aws_iam_role.node.name
+}
+
+# S3 access for fluent-bit log shipping
+resource "aws_iam_role_policy" "node_s3_logs" {
+  name = "s3-logs-write"
+  role = aws_iam_role.node.id
+
+  policy = jsonencode({
+    Version = "2012-10-17"
+    Statement = [
+      {
+        Effect   = "Allow"
+        Action   = ["s3:PutObject", "s3:GetObject", "s3:ListBucket"]
+        Resource = [
+          aws_s3_bucket.logs.arn,
+          "${aws_s3_bucket.logs.arn}/*"
+        ]
+      }
+    ]
+  })
+}

terraform/logging.tf

@@ -60,31 +60,6 @@ resource "aws_athena_workgroup" "logs" {
   }
 }
 
-# IAM user for fluent-bit to write to S3
-resource "aws_iam_user" "fluentbit" {
-  name = "${var.cluster_name}-fluentbit"
-}
-
-resource "aws_iam_access_key" "fluentbit" {
-  user = aws_iam_user.fluentbit.name
-}
-
-resource "aws_iam_user_policy" "fluentbit" {
-  name = "fluentbit-s3-write"
-  user = aws_iam_user.fluentbit.name
-
-  policy = jsonencode({
-    Version = "2012-10-17"
-    Statement = [
-      {
-        Effect   = "Allow"
-        Action   = ["s3:PutObject"]
-        Resource = "${aws_s3_bucket.logs.arn}/*"
-      }
-    ]
-  })
-}
-
 output "logs_bucket" {
   value = aws_s3_bucket.logs.bucket
 }

terraform/main.tf

@@ -64,8 +64,9 @@ resource "aws_eip_association" "controlplane" {
 
 # Launch control plane instance
 resource "aws_instance" "controlplane" {
-  ami           = var.ami_id
-  instance_type = var.instance_type
+  ami                  = var.ami_id
+  instance_type        = var.instance_type
+  iam_instance_profile = aws_iam_instance_profile.node.name
 
   network_interface {
     network_interface_id = aws_network_interface.controlplane.id