In this Splunk tutorial we are going to learn about the Alerts in the Splunk. How to create an Alert, Types of Alert, the workflow of Alert, Comparison between different types of Alert, Real time Alert, Scheduled Alert, Rolling time Window trigging.
Alerts occur when particular criteria are met for the search results. When alerts activate, we can use the warning actions to respond. It is used to monitor specific events and respond to them. It includes facts, instructions, and warning action scenarios for use.
The alerting workflow
Alerts combine a saved search, type and trigger configurations, and action alerts. Here are some details of how the various portions of an alert work together.
Search: What would we like to have a track of?
Start by searching for the events that we wish to track. Save as Alert the search.
Alert type: How often do we want to check for events?
The alert uses the search we save to check for events. Set the type of alert to configure how often the search will run. Use a scheduled alert to check for the events regularly. We can also use an actual-time alert for continuous monitoring of events.
Alert trigger conditions and throttling in the Splunk platform: How often do we want to trigger an alert?
An alert doesn't have to trigger each time the search results are generated-set conditions to manage trigger when the alert triggers. We can also throttle an alert to control how quickly following an initial alert can trigger the next alert.
Alert Action: What happens in the Splunk environment when the alert triggers?
When an alert triggers, one or more alert actions may be initialized. An alert action can notify us of a triggered alert and can help us get started to respond. We may customize the frequency and type of warning action.
Two types of alerts exist, scheduled and in real-time. Definitions of type of alert are based on the timing of the search alert. We can customize timing, activation, and other actions for either type of alarm according to the scenario.
Alert type comparison
Here is a comparison of the alerts in schedule and in real-time.
Alert type and triggering scenarios
Once we select a scheduled or real-time alert, we can configure how the alert will trigger outcomes. Depending on the events we are monitoring, we may need a real-time alert that triggers with each result or a scheduled alert that triggers only if results meet certain conditions. The following scenarios show various use cases for alert and trigger types.
Use a scheduled alert to search for events regularly, and monitor if they meet specific conditions. If immediate or real-time monitoring is not a priority, a scheduled alert is useful.
Real-time alerts constantly scan for incidents. In circumstances where immediate monitoring and responses are relevant, they can be useful. We can use real-time warnings that occur once per outcome or only if those conditions are met within a limited time span of rolling.
A real-time alert with a triggering condition is sometimes referred to as an "alert per outcome" Use this type of alert and trigger to search for events continuously and get notifications when events occur.
Caution: Use with caution per-outcome triggering in a high-availability deployment. If a peer is not available, a search in real-time does not warn that the search may be incomplete. For this deployment, it is recommended that a scheduled alert be used.
Here are a few examples of using an actual-time alarm with triggering per-result.
Rolling time window triggering
A real-time alert that triggers a rolling time window is sometimes called a "rolling window alert." This form of alarm and activation is useful when a specific time period is an important part of the sequence of events we are tracking in real-time.
Here are some examples of using an actual-time warning to activate the rolling time window.
Create real-time alerts in Splunk Web
We use a real-time alert to monitor events or patterns of events as they occur. We can create real-time alerts with triggering of per-result or rolling time window. Real-time alerts can be expensive in terms of computing resources, so consider using a scheduled alert when possible.
Create a real-time alert with per-result triggering
Real-time alerts with triggering per-output are sometimes referred to as per-outcome alerts. This type of alert and trigger uses a continuous real-time search to search for events. Any outcome of the search activates the warning.
Note: If we have a high-availability deployment at Splunk Enterprise, use cautiously per-result triggering. If a peer is not available, a search in real-time does not warn that the search may be incomplete. Use a scheduled alert to avoid the issue.
Follow these steps to generate an actual time warning with triggering per-result.