Updates Grafana installation docs to latest state

doc/110-Installation/40-Grafana-Integration.md

@@ -11,8 +11,46 @@ To use Icinga for Windows Grafana Dashboards, you require the following componen
 * [Icinga Web Grafana Module](https://github.com/Mikesch-mp/icingaweb2-module-grafana)
 * [Icinga InfluxDB 2 Writer Feature enabled](https://icinga.com/docs/icinga-2/latest/doc/09-object-types/#influxdb2writer)
 
+Please note that dashboards might also work with older Grafana versions (like version 8.x or 7.x), but wasn't tested with those versions.
+
 ## Installation
 
+### Install Grafana Dashboards
+
+Each plugin repository ships with a bunch of `.json` files, containing the configuration for the Grafana dashboards. These are located inside `config/grafana/dashboards/`.
+
+To `Import` these dashboards, you simply have to navigate to `Dashboards` -> `Import` inside Grafana
+
+![Import Dashboards](../images/05_installation/01_grafana/01_import_dashboard.png)
+
+On the section `Import via panel json`, copy the content of the `.json` file you wish to import or select the file to import. Repeat this process for each single file. There is currently no option to import multiple files at once.
+
+### Update Dashboard Configuration
+
+Last but not least, we require to update each Grafana dashboard to properly use your `InfluxDB 2` `Bucket` for the monitoring data collected by `Icinga`, unless your default Icinga monitoring bucket is called `icinga2`.
+
+To do so, open the dashboard you want to `edit` and hit the settings icon ![Import Dashboards](../images/05_installation/01_grafana/02_settings_icon.png) on the top right of the window.
+
+Now on the left side, click on `Variables` and search for the variable `influxbucket` on the right side. Click on the table entry with the name `influxbucket` and modify the `Constant options` `Value` with the name of the `InfluxDB 2` `Bucket`, your `Icinga` is writing monitoring metrics into.
+
+### Set InfluxDB Backend as default
+
+In case you are running multiple backends or require to save a certain backend as default, you can simply update each dashboard by selecting the correct InfluxDB backend for the variable `InfluxDB DataSource`.
+
+Once selected, head over to the save icon ![Save Icon](../images/05_installation/01_grafana/04_save_icon.png) on the top right side, click on it and afterwards select the checkbox `Save current variable values as dashboard default` and click on `Save`.
+
+![Save Dashboard](../images/05_installation/01_grafana/05_save_dashboard.png)
+
+Once done, this backend will be used whenever you load the dashboard. This is especially required for the below Icinga Web integration, ensuring that information can be fetched.
+
+### Updating Dashboards
+
+We do not recommend to manually modify or change on how the dashboards display metrics or extend them. You can use our dashboards as templates or provide pull requests/feature request on the component repositories.
+
+Icinga will provide frequent updates for the dashboards, which will overwrite your manual changes.
+
+To update new provided dashboards, you will have to delete the dashboard and import it again as described above.
+
 ### Install Icinga Web Module
 
 By default, you have to install the [Icinga Web Grafana Module](https://github.com/Mikesch-mp/icingaweb2-module-grafana) into
@@ -37,13 +75,13 @@ You can either edit the configuration for the module within Icinga Web or edit t
 ```
 [grafana]
 host = "grafana.example.com:3000"
-protocol = "https"
+protocol = "http"
 timerangeAll = "1w/w"
 defaultdashboarduid = "QsPVl5W4z"
 defaultdashboardpanelid = "1"
 shadows = "0"
 theme = "dark"
-datasource = "<influxdb source>"
+datasource = "influxdb"
 accessmode = "iframe"
 debug = "0"
 defaultdashboard = "windows-plugins-web"
@@ -51,10 +89,10 @@ defaultorgid = "1"
 ssl_verifypeer = "0"
 ssl_verifyhost = "0"
 custvardisable = ""
-timerange = "3h"
+timerange = "1h"
 ```
 
-Please update the fields `host`, `datasource` and possibly `custvardisable` accordingly. The `defaultdashboarduid` with value `QsPVl5W4z` is the Icinga for Windows Base-Template, while the `defaultdashboard` with `windows-plugins-web` is the name.
+Please update the field `host` accordingly. The `defaultdashboarduid` with value `QsPVl5W4z` is the Icinga for Windows `Windows-Plugins-Web`-Template id, while the `defaultdashboard` with `windows-plugins-web` is the name.
 
 ### Install Icinga for Windows Graphs
 
@@ -68,24 +106,6 @@ The default location is
 /etc/icingaweb2/modules/grafana/graphs.ini
 ```
 
-### Install Grafana Dashboards
-
-Each plugin repository ships with a bunch of `.json` files, containing the configuration for the Grafana dashboards. These are located inside `config/grafana/dashboards/`.
-
-To `Import` these dashboards, you simply have to navigate to `Dashboards` -> `Import` inside Grafana
-
-![Import Dashboards](../images/05_installation/01_grafana/01_import_dashboard.png)
-
-On the section `Import via panel json`, copy the content of the `.json` file you wish to import. Repeat this process for each single file. There is currently no option to import multiple files at onces.
-
-### Update Dashboard Configuration
-
-Last but not least, we require to update each Grafana dashboard to properly use your `InfluxDB 2` `Bucket` for the monitoring data collected by `Icinga`.
-
-To do so, open the dashboard you want to `edit` and hit the settings icon ![Import Dashboards](../images/05_installation/01_grafana/02_settings_icon.png) on the top right of the window.
-
-Now on the left side, click on `Variables` and search for the variable `influxbucket` on the right side. Click on the table entry with the name `influxbucket` and modify the `Constant options` `Value` with the name of the `InfluxDB 2` `Bucket`, your `Icinga` is writing monitoring metrics into.
-
 ### Overview
 
 Once all above steps are successfully completed, you can have a look on your Grafana dashboards