enable creating alerts from json files in folder (#11)

grafana_alert/main.tf

@@ -0,0 +1,34 @@
+
+resource "grafana_rule_group" "alertrule" {
+  for_each = { for file in var.alertrule_files : file => jsondecode(file("${file}"))
+  }
+  name       = each.value.groups[0].name
+  folder_uid = var.folder # Folder specified in the json will be skipped since it does not contain UID.
+  # This solve the example for having to convert "1m" to integer seconds
+  interval_seconds = regex("^[0-9]*", each.value.groups[0].interval) * (regex("[m|h|s]$", each.value.groups[0].interval) == "m" ? 60 : (regex("[m|h|s]$", each.value.groups[0].interval) == "h" ? 1440 : 1))
+  dynamic "rule" {
+    for_each = each.value.groups[0].rules
+    content {
+      name           = rule.value.title
+      for            = rule.value.for
+      condition      = rule.value.condition
+      no_data_state  = rule.value.noDataState
+      annotations    = rule.value.annotations
+      exec_err_state = rule.value.execErrState
+      is_paused      = rule.value.isPaused
+      labels         = rule.value.labels
+      dynamic "data" {
+        for_each = rule.value.data
+        content {
+          datasource_uid = data.value.datasourceUid
+          ref_id         = data.value.refId
+          relative_time_range {
+            from = data.value.relativeTimeRange.from
+            to   = data.value.relativeTimeRange.to
+          }
+          model = jsonencode(data.value.model)
+        }
+      }
+    }
+  }
+}

grafana_alert/variables.tf

@@ -0,0 +1,9 @@
+variable "folder" {
+  description = "UID of the folder to create the alert rules in"
+  type        = string
+}
+
+variable "alertrule_files" {
+  description = "Path to the json files with alert rules"
+  type        = list(string)
+}

grafana_alert/versions.tf

@@ -0,0 +1,10 @@
+terraform {
+  required_version = ">= 1.3.0, < 1.6.0"
+
+  required_providers {
+    grafana = {
+      source  = "grafana/grafana"
+      version = ">= 2.9.0"
+    }
+  }
+}