Epsagon alerts support many use cases: Kubernetes metrics, application performance metrics, and application exceptions.

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Exception alerts

Exception alerts are collected from the tracing libraries and available only for traced services and code

Manage your alert rules

• To manage your alert rules, go to Alerts
• To create a new alert rule, click Create New Alert.
  To set up an alert for exceptions, go to the alerts page, and create a new "simple" alert. In the alert type - choose Exception.

Lambda Events

Lambda event alerts are triggered for each Lambda invocation event of specific types.

• Select event types to trigger the alert. Support events types are: Timeout, Out of Memory, Code Exception (available for traced functions), Function Error (identified by CloudWatch logs), Insight (function is close to the time limit or memory limit).
• Filter which Lambda functions will trigger the alert by Application, specific Functions or AWS Accounts.

Lambda Metric

Lambda metric alerts are triggered whenever Lambda invocations cross a specific threshold over time. For example, when the average number of invocations ending in timeout is greater than 10 invocations for a period of 15 minutes.

To create a Lambda metric alert:

• Select an aggregation function
• Select the invocation event on which to base the metric
• Select an operator and the threshold value
• Select the timeframe in which to check the metric value before triggering the alert

Trace Metrics Alerts

Trace metric alerts trigger when a check on trace data is met. For example, when the average duration of putting items in a specific DynamoDB is longer than 2 seconds.

To create a trace metric alert:

• Select an aggregation function
• Choose filters to narrow down the metric. For example, filter traces by a Kafka stream name, or Kubernetes cluster.

Also, you need to create a threshold for your alert:

• Frequency - How often the alert rule should be checked.
• Evaluate For - For how long the threshold is checked. The threshold must be met for this amount of time in order to make the alert fire.

Select the conditions for your alert:

• Reducer - Choose a reducing function for your query results.
• Query - Choose what query to apply these conditions for.
• From, To - Choose a timeframe for the alert's evaluation.
• Operator - For comparison to the threshold.
• Threshold - Your selected threshold.

Epsagon Metrics Alerts

"Epsagon Metrics" alerts let you configure alerts based on metrics collected by your Prometheus. See our Kubernetes integration page for further info.

To create an "Epsagon Metrics" alert:

• Select the metric you want to alert for.
• Select an aggregation for the metric.
• Filter the metric by specific filters.

See trace metrics alerts for threshold information.

Cloudwatch Metric Alerts

Cloudwatch metrics alerts trigger when a Cloudwatch metric crosses a given threshold.

To create a Cloudwatch metric alert:

• Select a namespace, and a stat to alert for.
• Choose the dimensions to alert for. For example, a specific API, or all APIs.

Also, you need to create a threshold for your alert:

• Frequency - How often the alert rule should be checked.
• Evaluate For - For how long the threshold is checked. The threshold must be met for this amount of time in order to make the alert fire.

Select the conditions for your alert: