Manage alerts with Alertmanager in KubeSphere

KubeSphere has been using Prometheus as its monitoring service’s backend from the first release. Starting from v3.0, KubeSphere adds Alertmanager to its monitoring stack to manage alerts sent from Prometheus as well as other components such as kube-events and kube-auditing.

Starting from v3.0, KubeSphere adds popular alert rules in the open source community to its Prometheus offering as builtin alert rules. And by default Prometheus in KubeSphere v3.0 evaluates these builtin alert rules continuously and then sends alerts to Alertmanager.

Alertmanager can be used to manage alerts sent from sources other than Prometheus. In KubeSphere v3.0 and above, user can use it to manage alerts triggered by K8s events. For more details, please refer to

Generally, to receive notifications for Alertmanager alerts, users have to edit Alertmanager’s configuration files manually to configure receiver settings such as Email and Slack.

This is not convenient for K8s users and it breaks the multi-tenant principle/architecture of KubeSphere. More specifically, alerts triggered by workloads in different namespaces belonging to different users might be sent to the same user.

For more details about using Notification Manager to receive Alertmanager Notifications, please refer to Notification Manager