Solution

main.tf

@@ -1,3 +1,53 @@
 # 1. Deploy an S3 storage bucket 
 
+resource "aws_s3_bucket" "mb" {
+  bucket = "my-tf-test-bucket-mate"
+
+  tags = {
+    Name        = "My bucket"
+    Environment = "Dev"
+  }
+}
 # 2. Confugure bucket policy to allow grafana iam role to use storage 
+
+
+data "aws_iam_policy_document" "grafana_s3_access" {
+  statement {
+    sid = "AllowListBucket"
+    principals {
+      type        = "AWS"
+      identifiers = [var.grafana_iam_role_arn]
+    }
+
+    actions = [
+      "s3:ListBucket",
+    ]
+
+    resources = [
+      aws_s3_bucket.mb.arn,
+    ]
+  }
+
+  statement {
+    sid = "AllowGetPutObjects"
+    principals {
+      type        = "AWS"
+      identifiers = [var.grafana_iam_role_arn]
+    }
+
+    actions = [
+      "s3:GetObject",
+      "s3:PutObject",
+    ]
+
+    resources = [
+      "${aws_s3_bucket.mb.arn}/*",
+    ]
+  }
+}
+
+
+resource "aws_s3_bucket_policy" "grafana" {
+  bucket = aws_s3_bucket.mb.id
+  policy = data.aws_iam_policy_document.grafana_s3_access.json
+}

outputs.tf

@@ -1,4 +1,4 @@
 output "bucket_name" {
-    value = aws_s3_bucket.grafana_backups.bucket
+    value = aws_s3_bucket.mb.bucket
     sensitive = false
 }

terraform.tfvars

@@ -1 +1 @@
-grafana_iam_role_arn = ""
+grafana_iam_role_arn = "arn:aws:iam::794250697857:role/grafana-role-asume-policy"

tfplan.json

@@ -0,0 +1 @@
+{"format_version":"1.2","terraform_version":"1.12.2","variables":{"grafana_iam_role_arn":{"value":"arn:aws:iam::794250697857:role/grafana-role-asume-policy"}},"planned_values":{"outputs":{"bucket_name":{"sensitive":false,"type":"string","value":"my-tf-test-bucket"}},"root_module":{"resources":[{"address":"aws_s3_bucket.mb","mode":"managed","type":"aws_s3_bucket","name":"mb","provider_name":"registry.terraform.io/hashicorp/aws","schema_version":0,"values":{"bucket":"my-tf-test-bucket","force_destroy":false,"tags":{"Environment":"Dev","Name":"My bucket"},"tags_all":{"Environment":"Dev","Name":"My 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5.0"}},"root_module":{"outputs":{"bucket_name":{"expression":{"references":["aws_s3_bucket.mb.bucket","aws_s3_bucket.mb"]}}},"resources":[{"address":"aws_s3_bucket.mb","mode":"managed","type":"aws_s3_bucket","name":"mb","provider_config_key":"aws","expressions":{"bucket":{"constant_value":"my-tf-test-bucket"},"tags":{"constant_value":{"Environment":"Dev","Name":"My 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