Alerting: Add TLS, QoS and retain options to the MQTT receiver (#92331)

docs/sources/administration/provisioning/index.md

@@ -506,15 +506,26 @@ The following sections detail the supported settings and secure settings for eac
 
 #### Alert notification `MQTT`
 
+| Name          | Secure setting |
+| ------------- | -------------- |
+| brokerUrl     |                |
+| clientId      |                |
+| topic         |                |
+| messageFormat |                |
+| username      |                |
+| password      | yes            |
+| retain        |                |
+| qos           |                |
+| tlsConfig     |                |
+
+##### TLS config
+
 | Name               | Secure setting |
 | ------------------ | -------------- |
-| brokerUrl          |                |
-| clientId           |                |
-| topic              |                |
-| messageFormat      |
-| username           |                |
-| password           | yes            |
 | insecureSkipVerify |                |
+| clientCertificate  | yes            |
+| clientKey          | yes            |
+| caCertificate      | yes            |
 
 #### Alert notification `pagerduty`
 

docs/sources/alerting/set-up/provision-alerting-resources/file-provisioning/index.md

@@ -362,8 +362,20 @@ settings:
   username: grafana
   # <string>
   password: password1
+  # <string>
+  qos: 0
   # <bool>
-  insecureSkipVerify: false
+  retain: false
+  # <map>
+  tlsConfig:
+    # <bool>
+    insecureSkipVerify: false
+    # <string>
+    clientCertificate: certificate in PEM format
+    # <string>
+    clientKey: key in PEM format
+    # <string>
+    caCertificate: CA certificate in PEM format
 ```
 
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