Alerting: Store sensitive settings encrypted for OpsGenie notifier (#27074)

* encrypt OpsGenie API key

* make whitespace consistent

* update docs

docs/sources/administration/provisioning.md

@@ -511,12 +511,12 @@ The following sections detail the supported settings and secure settings for eac
 
 #### Alert notification `opsgenie`
 
-| Name             |
-| ---------------- |
-| apiKey           |
-| apiUrl           |
-| autoClose        |
-| overridePriority |
+| Name             | Secure setting |
+| ---------------- | - |
+| apiKey           | yes |
+| apiUrl           | |
+| autoClose        | |
+| overridePriority | |
 
 #### Alert notification `telegram`
 

pkg/services/alerting/notifiers/opsgenie.go

@@ -21,8 +21,21 @@ func init() {
 		OptionsTemplate: `
 		<h3 class="page-heading">OpsGenie settings</h3>
 		<div class="gf-form">
-        <span class="gf-form-label width-14">API Key</span>
-        <input type="text" required class="gf-form-input max-width-22" ng-model="ctrl.model.settings.apiKey" placeholder="OpsGenie API Key"></input>
+			<label class="gf-form-label max-width-14">API Key</label>
+			<div class="gf-form gf-form--grow" ng-if="!ctrl.model.secureFields.apiKey">
+				<input type="text"
+					required
+					class="gf-form-input max-width-22"
+					ng-init="ctrl.model.secureSettings.apiKey = ctrl.model.settings.apiKey || null; ctrl.model.settings.apiKey = null;"
+					ng-model="ctrl.model.secureSettings.apiKey"
+					placeholder="OpsGenie API Key"
+					data-placement="right">
+				</input>
+			</div>
+			<div class="gf-form" ng-if="ctrl.model.secureFields.apiKey">
+			  <input type="text" class="gf-form-input max-width-18" disabled="disabled" value="configured" />
+			  <a class="btn btn-secondary gf-form-btn" href="#" ng-click="ctrl.model.secureFields.apiKey = false">reset</a>
+			</div>
 		</div>
 		<div class="gf-form">
 			<span class="gf-form-label width-14">Alert API Url</span>
@@ -87,7 +100,7 @@ var (
 func NewOpsGenieNotifier(model *models.AlertNotification) (alerting.Notifier, error) {
 	autoClose := model.Settings.Get("autoClose").MustBool(true)
 	overridePriority := model.Settings.Get("overridePriority").MustBool(true)
-	apiKey := model.Settings.Get("apiKey").MustString()
+	apiKey := model.DecryptedValue("apiKey", model.Settings.Get("apiKey").MustString())
 	apiURL := model.Settings.Get("apiUrl").MustString()
 	if apiKey == "" {
 		return nil, alerting.ValidationError{Reason: "Could not find api key property in settings"}