feat: add infra's terraform configs (#164)

* feat: add infra's terraform configs

* feat: add databases for openobserve - multi clusters

* fix: openobserve's db name

infra/minio/tf-s3-backend/tf-s3-backend.tf

@@ -0,0 +1,64 @@
+# https://developer.hashicorp.com/terraform/language/settings/backends/s3
+resource "minio_s3_bucket" "tf-s3-backend" {
+  bucket = "tf-s3-backend"
+  acl    = "private"
+}
+
+resource "minio_iam_user" "tf-s3-backend" {
+  name          = "tf-s3-backend"
+  force_destroy = true
+  tags = {
+    env       = "prod"
+    managedBy = "terraform"
+  }
+}
+
+resource "minio_iam_policy" "tf-s3-backend" {
+  name   = "tf-s3-backend"
+  policy = <<EOF
+{
+  "Version": "2012-10-17",
+  "Statement": [
+    {
+      "Effect": "Allow",
+      "Action": "s3:ListBucket",
+      "Resource": "arn:aws:s3:::tf-s3-backend"
+    },
+    {
+      "Effect": "Allow",
+      "Action": ["s3:GetObject", "s3:PutObject", "s3:DeleteObject"],
+      "Resource": "arn:aws:s3:::tf-s3-backend/*"
+    }
+  ]
+}
+EOF
+}
+
+resource "minio_iam_user_policy_attachment" "tf-s3-backend-1" {
+  user_name   = minio_iam_user.tf-s3-backend.id
+  policy_name = minio_iam_policy.tf-s3-backend.id
+}
+
+resource "minio_iam_service_account" "tf-s3-backend" {
+  target_user = minio_iam_user.tf-s3-backend.name
+}
+
+
+# ======================================================
+
+output "tf-s3-backend_id" {
+  value = minio_s3_bucket.tf-s3-backend.id
+}
+
+output "tf-s3-backend_url" {
+  value = minio_s3_bucket.tf-s3-backend.bucket_domain_name
+}
+
+output "tf-s3-backend_accesskey" {
+  value = minio_iam_service_account.tf-s3-backend.access_key
+}
+
+output "tf-s3-backend_secretkey" {
+  value     = minio_iam_service_account.tf-s3-backend.secret_key
+  sensitive = true
+}