docs(alerting): rewrite alert docs

docs/sources/alerting/alerting.md

@@ -8,104 +8,21 @@ page_keywords: alerting, grafana, plugins, documentation
 
 > Alerting is still in very early development. Please be aware.
 
-The roadmap for alerting is described in [issue #2209](https://github.com/grafana/grafana/issues/2209#issuecomment-210077445) and the current state can be found at this page.
+The roadmap for alerting in Grafana have been changing rapidly during last 2-3 months. So make sure you follow the disucssion in the [alerting issue](https://github.com/grafana/grafana/issues/2209).
 
 ## Introduction
 
-So far Grafana does only support saving alering rules but not execute it. This means that you have to export them from grafana using the api and import them into your monitoring tool of choice. The current defintion of an alert rule looks like this:
+> Alerting is turned off by default and have to be enabled in the config file.
 
-``` go
-type AlertRule struct {
-  Id           int64  `json:"id"`
-  OrgId        int64  `json:"-"`
-  DashboardId  int64  `json:"dashboardId"`
-  PanelId      int64  `json:"panelId"`
-  Query        string `json:"query"`
-  QueryRefId   string `json:"queryRefId"`
-  WarnLevel    int64  `json:"warnLevel"`
-  CritLevel    int64  `json:"critLevel"`
-  WarnOperator string `json:"warnOperator"`
-  CritOperator string `json:"critOperator"`
-  Interval     string `json:"interval"`
-  Title        string `json:"title"`
-  Description  string `json:"description"`
-  QueryRange   string `json:"queryRange"`
-  Aggregator   string `json:"aggregator"`
-  State        string `json:"state"`
-}
-```
+Grafana lets you define alert rules based on metrics queries on dashboards. Every alert is connected to a panel and when ever the query for the panel is updated the alerting rule is also updated.
+So far only the graph panel supports alerting. To enable alerting for a panel go to the alerting tab and press 'Create alert' button.
 
-Most of these properties might require some extra explaination.
+## Alert status page
 
-Query: json representation of the query used by grafana. Differes depending on datasource.
-QueryRange: The time range for which the query should look back.
-Aggregator: How the result should be reduced into a single value. ex avg, sum, min, max
-State: Current state of the alert OK, WARN, CRITICAL, ACKNOWLEGED.
+You can overview all your current alerts on the alert stats page at /alerting
 
-You can configure these settings in the Alerting tab on graph panels in edit mode. When the dashboard is saved the alert is created or updated based on the dashboard. If you wish to delete an alert you simply set the query to '- select query -' in the alerting tab and save the dashboard.
+## Alert notifications
 
-## Api
+When an alert is triggered it goes to the notification handler who takes care of sending emails or push data as webhooks.
+The alert notifications can be configured on /alerting/notifications
 
-### Alert rules
-
-``` url
-GET /api/alerts/rules
-```
-
-``` http
-state //array of strings *optional*
-dashboardId //int *optional*
-panelId //int *optional*
-
-Result
-[]AlertRule
-```
-
-``` http
-GET /api/alerts/rules/:alertId
-
-Result AlertRule
-```
-
-### Alert state
-
-``` http
-GET /api/alerts/rulres/:alertId/states
-
-Result
-[
-  {
-    alertId: int,
-    newState: OK, WARN, CRITICAL, ACKNOWLEGED,
-    created: timestamp,
-    info: description of what might have caused the changed alert state
-  }
-]
-```
-
-``` http
-PUT /api/alerts/rulres/:alertId/state
-Request
-{
-  alertId: alertid,
-  newState: OK, WARN, CRITICAL, ACKNOWLEGED,
-  info: description of what might have caused the changed alert state
-}
-```
-
-### Alert rule changes
-``` http
-GET /api/alerts/changes
-limit //array of strings *optional*
-sinceId //int *optional*
-
-Result
-[
-  {
-    id: incrementing id,
-    alertId: alertId,
-    type: CREATED/UPDATED/DELETED,
-    created: timestamp,
-  }
-]
-```