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Elastic Docs ›Kibana Guide [8.10] ›Stack Monitoring

Kibana alerts

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Kibana alerts

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The Elastic Stack monitoring features provide Alerting rules out-of-the box to notify you of potential issues in the Elastic Stack. These rules are preconfigured based on the best practices recommended by Elastic. However, you can tailor them to meet your specific needs.

Kibana alerting notifications in Stack Monitoring

When you open Stack Monitoring for the first time, you will be asked to acknowledge the creation of these default rules. They are initially configured to detect and notify on various conditions across your monitored clusters. You can view notifications for: Cluster health, Resource utilization, and Errors and exceptions for Elasticsearch in real time.

The default Watcher based "cluster alerts" for Stack Monitoring have been recreated as rules in Kibana alerting features. For this reason, the existing Watcher email action monitoring.cluster_alerts.email_notifications.email_address no longer works. The default action for all Stack Monitoring rules is to write to Kibana logs and display a notification in the UI.

To review and modify existing Stack Monitoring rules, click Enter setup mode on the Cluster overview page. Alternatively, to manage all rules, including create and delete functionality go to Stack Management > Rules.

CPU usage threshold

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This rule checks for Elasticsearch nodes that run a consistently high CPU load. By default, the condition is set at 85% or more averaged over the last 5 minutes. The default rule checks on a schedule time of 1 minute with a re-notify interval of 1 day.

Disk usage threshold

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This rule checks for Elasticsearch nodes that are nearly at disk capacity. By default, the condition is set at 80% or more averaged over the last 5 minutes. The default rule checks on a schedule time of 1 minute with a re-notify interval of 1 day.

JVM memory threshold

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This rule checks for Elasticsearch nodes that use a high amount of JVM memory. By default, the condition is set at 85% or more averaged over the last 5 minutes. The default rule checks on a schedule time of 1 minute with a re-notify interval of 1 day.

Missing monitoring data

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This rule checks for Elasticsearch nodes that stop sending monitoring data. By default, the condition is set to missing for 15 minutes looking back 1 day. The default rule checks on a schedule time of 1 minute with a re-notify interval of 6 hours.

Thread pool rejections (search/write)

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This rule checks for Elasticsearch nodes that experience thread pool rejections. By default, the condition is set at 300 or more over the last 5 minutes. The default rule checks on a schedule time of 1 minute with a re-notify interval of 1 day. Thresholds can be set independently for search and write type rejections.

CCR read exceptions

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This rule checks for read exceptions on any of the replicated Elasticsearch clusters. The condition is met if 1 or more read exceptions are detected in the last hour. The default rule checks on a schedule time of 1 minute with a re-notify interval of 6 hours.

Large shard size

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This rule checks for a large average shard size (across associated primaries) on any of the specified data views in an Elasticsearch cluster. The condition is met if an index’s average shard size is 55gb or higher in the last 5 minutes. The default rule matches the pattern of -.* by running checks on a schedule time of 1 minute with a re-notify interval of 12 hours.

Cluster alerting

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These rules check the current status of your Elastic Stack. You can drill down into the metrics to view more information about your cluster and specific nodes, instances, and indices.

An action is triggered if any of the following conditions are met within the last minute:

  • Elasticsearch cluster health status is yellow (missing at least one replica) or red (missing at least one primary).
  • Elasticsearch version mismatch. You have Elasticsearch nodes with different versions in the same cluster.
  • Kibana version mismatch. You have Kibana instances with different versions running against the same Elasticsearch cluster.
  • Logstash version mismatch. You have Logstash nodes with different versions reporting stats to the same monitoring cluster.
  • Elasticsearch nodes changed. You have Elasticsearch nodes that were recently added or removed.

  • Elasticsearch license expiration. The cluster’s license is about to expire.

    If you do not preserve the data directory when upgrading a Kibana or Logstash node, the instance is assigned a new persistent UUID and shows up as a new instance.

  • Subscription license expiration. When the expiration date approaches, you will get notifications with a severity level relative to how soon the expiration date is:

    • 60 days: Informational alert
    • 30 days: Low-level alert
    • 15 days: Medium-level alert

    • 7 days: Severe-level alert

      The 60-day and 30-day thresholds are skipped for Trial licenses, which are only valid for 30 days.

Alerts and rules

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Create default rules

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This option can be used to create default rules in this Kibana space. This is useful for scenarios when you didn’t choose to create these default rules initially or anytime later if the rules were accidentally deleted.

Some action types are subscription features, while others are free. For a comparison of the Elastic subscription levels, see the alerting section of the Subscriptions page.

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