Alerting: Use stable identifier of a group when export to HCL (#90196)

* change the rule-group to be hashed when exporting to HCL

Signed-off-by: Aviv Guiser <avivguiser@gmail.com>

---------

Signed-off-by: Aviv Guiser <avivguiser@gmail.com>

pkg/services/ngalert/api/api_provisioning.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"hash/fnv"
 	"net/http"
 	"strings"
 
@@ -587,11 +588,15 @@ func exportResponse(c *contextmodel.ReqContext, body definitions.AlertingFileExp
 func exportHcl(download bool, body definitions.AlertingFileExport) response.Response {
 	resources := make([]hcl.Resource, 0, len(body.Groups)+len(body.ContactPoints)+len(body.Policies)+len(body.MuteTimings))
 	convertToResources := func() error {
-		for idx, group := range body.Groups {
+		for _, group := range body.Groups {
 			gr := group
+			sum := fnv.New64()
+			_, _ = sum.Write([]byte(gr.Name))
+			_, _ = sum.Write([]byte(gr.FolderUID))
+			hash := sum.Sum64()
 			resources = append(resources, hcl.Resource{
 				Type: "grafana_rule_group",
-				Name: fmt.Sprintf("rule_group_%04d", idx),
+				Name: fmt.Sprintf("rule_group_%016x", hash),
 				Body: &gr,
 			})
 		}

pkg/services/ngalert/api/api_provisioning_test.go

@@ -760,7 +760,7 @@ func TestProvisioningApi(t *testing.T) {
 				insertRule(t, sut, rule1)
 				insertRule(t, sut, createTestAlertRule("rule2", 1))
 
-				expectedResponse := `resource "grafana_rule_group" "rule_group_0000" {
+				expectedResponse := `resource "grafana_rule_group" "rule_group_cc0954af8a53fa18" {
   org_id           = 1
   name             = "my-cool-group"
   folder_uid       = "folder-uid"

pkg/services/ngalert/api/test-data/post-rulegroup-101-export.hcl

@@ -1,4 +1,4 @@
-resource "grafana_rule_group" "rule_group_0000" {
+resource "grafana_rule_group" "rule_group_d3e8424bfbf66bc3" {
   org_id           = 1
   name             = "group101"
   folder_uid       = "e4584834-1a87-4dff-8913-8a4748dfca79"