Alerting with Monitors
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You create monitors to set thresholds that trigger alerts to notify you about issues related to the resources in your network. For example, you can create a monitor to alert for node write latency for any of a multitude of protocols.
|Monitors and Alerting is available in Cloud Insights Standard Edition and higher.|
When the monitored threshold and conditions are reached or exceeded, Cloud Insights creates an alert. A Monitor can have a Warning threshold, a Critical threshold, or both.
Monitor or Performance Policy?
What’s the difference between a Performance Policy and a Monitor?
Policies allow you to set thresholds on "infrastructure" objects such as storage, VM, EC2, and ports. These policies trigger violations when thresholds are met or exceeded. Each violation can be investigated for troubleshooting. Policies are described in detail elsewhere in this documentation.
Monitors provide similar functionality for "integration" data such as those collected for Kubernetes, ONTAP advanced metrics, and Telegraf plugins, and alert when thresholds are crossed. With Monitors, you can set thresholds for Warning- or Critical-level alerts, or both.
Policies and Monitors are available under the Alerts menu.
Emails can be sent when a policy or monitor is triggered.
Creating a Monitor
In the example below, we will create a Monitor to give a Warning alert when Volume Node NFS Write Latency reaches or exceeds 200ms, and a Critical alert when it reaches or exceeds 400ms. We only want to be alerted when either threshold is exceeded for at least 15 continuous minutes.
Cloud Insights must be configured to collect integration data, and that data is being collected.
Create the Monitor
From the Cloud Insights menu, click Alerts > Manage Monitors
The Monitors list page is displayed, showing currently configured monitors.
To add a monitor, Click + Monitor. To modify an existing monitor, click the monitor name in the list.
The Monitor Configuration dialog is displayed.
In the drop-down, search for and choose an object type and metric to monitor, for example netapp_ontap_volume_node_nfs_write_latency.
You can set filters to narrow down which object attributes or metrics to monitor.
When working with integration data (Kubernetes, ONTAP Advanced Data, etc.), metric filtering removes the individual/unmatched data points from the plotted data series, unlike infrastructure data (storage, VM, ports etc.) where filters work on the aggregated value of the data series and potentially remove the entire object from the chart.
Define the Conditions of the Monitor.
After choosing the object and metric to monitor, set the Warning-level and/or Critical-level thresholds.
For the Warning level, enter 200. The dashed line indicating this Warning level displays in the example graph.
For the Critical level, enter 400. The dashed line indicating this Critical level displays in the example graph.
The graph displays historical data. The Warning and Critical level lines on the graph are a visual representation of the Monitor, so you can easily see when the Monitor might trigger an alert in each case.
For the occurence interval, choose Continuously for a period of 15 Minutes.
You can choose to trigger an alert the moment a threshold is breached, or wait until the threshold has been in continuous breach for a period of time. In our example, we do not want to be alerted every time the Total IOPS peaks above the Warning or Critical level, but only when a monitored object continuously exceeds one of these levels for at least 15 minutes.
Specify the email recipients for alert notifications. If desired, you can choose different recipients for warning or critical alerts.
If desired, you can add a description of the monitor.
Give the Monitor a meaningful name and click Save.
Your new monitor is added to the list of active Monitors.
The Monitor page lists the currently configured monitors, showing the following:
Object/metric being monitored
Conditions of the Monitor
You can choose to temporarily suspend monitoring of an object type by clicking the menu to the right of the monitor and selecting Pause. When you are ready to resume monitoring, click Resume.
You can copy a monitor by selecting Duplicate from the menu. You can then modify the new monitor and change the object/metric, filter, conditions, email recipients, etc.
If a monitor is no longer needed, you can delete it by selecting Delete from the menu.