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GTM
What Is GTM?
GTM lists the DNS services defined on TR7 in the Left Monitor Panel together with their statuses and the value of a selected GTM metric. Every row is a DNS service; the colored strip on the left of the row shows the status of the service and the column on the right shows the value of the selected metric. When a row is clicked, the Dashboard tab of that service opens on the main screen.
By default the category shows the total of the DNS Query Rate metric over the last one day in the Total queries column and refreshes the values every 5 seconds; thus the list shows how many queries each DNS service has answered. The list is filtered by name and by status. The selected category, the filters and the view settings are stored per user; when the session is opened again, the panel comes in the same state.
DNS Services
Scope
All the DNS services defined on TR7 are listed
7
Statuses
OK, Error, Absent, Forwarder error, Forwarder absent, Host is off, vDevice is off
2
Filter Tabs
Name, Status
5s
Refresh
The default refresh interval; 10s, 30s and 60s are also selected
Accessing the Screen
- Left Monitor Panel is opened.
- GTM is selected from the category tabs at the top left.
- The DNS services defined on TR7 are listed.
- The service to be monitored is clicked; the screen opens with the Dashboard tab that carries the name of the service.
If GTM is not seen in the category list, the user does not have the GTM authorization or the category has been removed with the Edit Tabs arrangement in the category list; a removed category is added again from the same arrangement.
The GTM Screen
The GTM Screen
At the top part of the screen there are the category selector and the toolbar, below them the status strip, the search box and the DNS service table, and at the very bottom the metric information row and the total strip. By default the table opens with the following columns:
| Column | Description |
|---|---|
| The status strip | The colored strip on the left of the row shows the status of the DNS service; the colors are the same as the colors in the status strip. When it is hovered over, the status name is displayed. |
| GTM | The name of the DNS service. Long names are shortened; when they are hovered over, the full name is displayed. |
| Total queries | The total number of the queries the DNS service has answered (DNS Query Rate, Total queries). In the services that have no measurement - is displayed. |
The Total queries column belongs to the default Primary Metric value; when another metric is selected in the View Settings window, the columns of that metric come in place of this column. When a metric cell is hovered over, the name of the service, the metric, the period and the value are displayed. When the value changes, an arrow of two seconds appears in the metric cell, and when the status changes, in the name cell.
By default the table is sorted by name from A to Z. The sorting is changed by clicking a column header: the first click on a column that is not sorted sorts the name and status strip columns from the smallest to the largest and the metric columns from the largest to the smallest; a second click on the same column reverses the order and a third click removes the sorting. In the table one navigates between the rows with the ↑ and ↓ keys; the selected row opens half a second later and the Enter key opens the row immediately. The ← and → keys pass to the previous or the next category.
When a row is clicked, the Dashboard tab that carries the name of the service opens on the main screen; the Dashboard comes with the Display Period value in the panel.
The Category Selector
Which object group the panel will list is selected. When the label or the arrow next to it is clicked, the category list opens; the default order is Load Balancer vServices, WAF-Protected vServices, AGS-Enabled vServices, Bot/DDoS Protected vServices, Backend Services, Backend Service Groups, GTM, Interfaces and Route Tables & L4 DDoS. The categories for which the user has no authorization are not displayed in the list.
With the Edit Tabs button in the list, the categories are reordered by dragging, are added with Add Tab and are edited or deleted with the buttons on the right of the row. The changes are saved with the check mark; Discard changes undoes the changes made and Reset to Defaults returns to the default category list.
GTM List
By clicking the GTM list button, the DNS service listing screen opens on the main screen. While the listing screen is open, the button is displayed as active.
Search
The Search button shows or hides the search box above the table. The search is made only in the name of the DNS service and the table is filtered as it is typed. The cross mark in the box clears the search; the Esc key or clicking the button again hides the box and clears the search. Whether the box is open or closed is stored per user; by default it is open.
Filter
By clicking the Filter button, the Filter window opens. While a filter is active, a dot appears on the button and the tooltip of the button writes how many DNS services are shown in the form Showing X of Y.
View Settings
By clicking the Settings button, the View Settings window opens.
Collapse
The Collapse button collapses the panel. The collapsed panel turns into a narrow icon strip: every category is shown with an icon and the small status dots below it. When the icon is hovered over, the category name and the status distribution are displayed; when the icon is clicked, the panel expands again with that category. The width of the panel is changed by dragging its right edge and is stored per user.
The Metric Information Row
It shows the selected metric of the table, its calculation type and its period; by default it writes DNS Query Rate — Total queries, last 1 day(s). By clicking the row, the View Settings window opens. While the data is loading, the settings icon in the row turns; the ring around the icon shows the time remaining until the next refresh.
The total strip below it gives the total of the rows that are visible in the table at that moment (with the filter and the search applied): in the default metric, Σ Total queries. In the metrics that cannot be added up, such as a percentage or a ratio, the average (x̄) is shown instead of the total.
The Status Strip
The strip below the toolbar shows the number of the DNS services in the list by status; there is a box for every status that has a DNS service at that moment. The boxes are counted according to the other filters; the search and the Status filter do not change the numbers, so all the statuses continue to be seen on the strip.
| Status | Color | Meaning |
|---|---|---|
| OK | Green | The service is running. |
| Error | Red | The service exists but is not running. |
| Absent | Red | The service has not been created on the device yet. |
| Forwarder error | Red | The service is running but the DNS Forwarder component it is bound to is not running. |
| Forwarder absent | Red | The service is running but the DNS Forwarder component it is bound to has not been created. |
| Host is off | Gray | There is no connection with the device. |
| vDevice is off | Gray | The vDevice the service is bound to cannot be reached. |
The panel shows only the status on the device that is connected to; in a cluster setup the statuses of the devices are displayed separately on the listing screen. For the details of the statuses see DNS Service Listing Screen.
When a box is clicked, that status is added to the Status filter in the Filter window and the table shows only the DNS services in that status; when it is clicked again, the status is removed from the filter. More than one box can be selected and the selected boxes are displayed highlighted. The strip is hidden with the Show status bar option in the View Settings window.
The Filter Window
In the window that opens by clicking the Filter button, the DNS services in the table are filtered according to the values in the tabs.
The Filter Window
In the header of every tab the number of values in that tab is written, and next to every value the number of DNS services that have that value. When no value is selected in a tab, that tab does not filter the list. When more than one value is selected in a tab, the DNS services that match any one of them are listed, and when a selection is made in different tabs, the DNS services that match the condition of all the tabs are listed.
Tabs
INFO
Name Default: All
The names of the DNS services are listed; the selected services are shown in the table.
INFO
Status Default: All
It is filtered by service status; the statuses in the list are listed as labels with the colors in the status strip. Clicking a box in the status strip also changes the selection in this tab.
Window Controls
INFO
Select All
The Select all button selects all the values displayed in the tab; while all the values are selected, the button becomes Deselect all and removes the selection.
INFO
Search
In the Name tab the values are filtered according to the text typed in the search box; Select all is applied only to the filtered values. In the other tabs there is no search box.
INFO
Save
By clicking the Save button, the selected filters are applied and stored per user. If the window is closed without the Save button being clicked, the selections made are not applied.
The View Settings Window
In the window that opens by clicking the Settings button or the metric information row, which metric the table will show, its sorting and its refresh period are set.
The View Settings Window
The settings are stored per category and per user; a setting made for GTM does not affect the other categories.
Metrics
INFO
View Type Default: Basic
The view of the list is selected:
- Basic: the DNS services are listed as a table with the columns of the selected metric.
- Advanced: every DNS service is shown as a card; on the card there are at most five additional metrics together with the Primary Metric. In this view the Additional Metrics field in which the additional metrics are selected is added to the window.
INFO
Primary Metric Default: DNS Query Rate, Total queries
The metric to be shown in the table and the calculation type are selected. In the first box the GTM metrics of the DNS services are listed; these metrics are the panels on the Dashboard screen of the service. The Static group contains the information that does not depend on time:
- Counts: the number of domain names (Domains) and records (Records) in the service.
- Frontend: the first address and port the service listens on; if there is more than one address, the number of the remaining addresses is added as
+N. - Cache TTL: the cache period; if the cache is off it stays empty.
- Route table: the route table the service is bound to.
In the second box it is selected how the selected metric will be calculated. For DNS Query Rate the options are Last q/s, Avg. q/s, Max. q/s and Total queries.
Sorting & Appearance
INFO
Sort By Default: Name
The sorting criterion of the table is selected: Default Order, Name, Status or one of the columns of the selected metric.
INFO
Ascending Default: Checked
While it is checked, the sorting is made from the smallest to the largest (from A to Z), and while it is not checked, from the largest to the smallest.
INFO
Group by Status Default: Not checked
When it is selected, the DNS services are grouped by their statuses; the groups are arranged in the order Host is off and vDevice is off, Absent and Forwarder absent, Error and Forwarder error, OK. At the beginning of every group the status name and the number of DNS services are written; by clicking the group header, the group is opened or closed.
Data Refresh
INFO
Display Period Default: Last 1 day(s)
The period over which the metric value will be calculated is selected. The ready options are 1 minute, 5 minutes, 15 minutes, 30 minutes, 1 hour, 6 hours, 12 hours, 1 day, 1 week, 1 month, 3 months and 1 year; the period is also entered manually. The field is not displayed when no time-dependent metric is selected in the saved setting and in the window (e.g. when a metric is selected only from the Static group). The Dashboard that opens when a row is clicked comes with this period.
INFO
Refresh Interval Default: 5s
The refresh interval of the values in the table is selected: 5s, 10s, 30s, 60s.
INFO
Accept
By clicking the Accept button, the settings are saved and the table is refreshed with the new settings.
