Hands-On Microservices with Spring Boot and Spring Cloud

Setting up an alarm on the circuit breaker

To create an alarm on the circuit breaker, we need to create the alert and then add an alert list to the dashboard, where we can see what alert events have occurred over time.

Perform the following steps to create an alert for the circuit breaker:

1. In the Hands-on Dashboard, click on the header of the circuit breaker panel. A drop-down menu will appear.
2. Select the Edit menu option.
3. Select the Alert tab in the tab list to the left (shown as an alarm bell icon).
4. Click on the Create Alert button.
5. In the Evaluate every field, set the value to 10s.
6. In the For field, set the value to 0m.
7. In the Conditions section, specify the following values:
   • Set the WHEN field to max().
   • Set the OF field to query(A, ...