Spring Boot Starter Actuator Frequently Asked Questions About Boot Starter Actual

Spring Boot Starter Actuator Common Questions Answers Question 1: What is Spring Boot Starter Actuator? Spring Boot Starter Actuator is a module for monitoring and managing Spring Boot applications.It provides a large number of built -in endpoints (Endpoints) to view various indicators, health status, configuration information, and perform some management tasks of the application. Question 2: How to add Spring Boot Starter Actuator? To use the Spring Boot Starter Actuator, you need to add the following dependencies to the pom.xml file of the project: <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> Question 3: How to enable the endpoint of Actuator? By default, Spring Boot Starter Actuator automatically enables a set of commonly used endpoints, such as/actuator/health,/actuator/info, etc.To customize the endpoint, you can add the following configuration in the Application.properties (or Application.yml) file: properties management.endpoints.web.exposure.include=health,info The above configuration will be enabled by the/actuator/health and/actuator/info endpoint. Question 4: How to protect the sensitive Actuator endpoint? The information returned by some Actuator endpoints may contain sensitive data. In order to protect this information, you can configure security certification. First, add Spring Security dependence: <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-security</artifactId> </dependency> Then, add the following configuration to the Application.properties (or Application.yml) file to enable security certification: properties spring.security.user.name=admin spring.security.user.password=admin_password The above configuration will create a simple security certification with a user name Admin and password Admin_password. Question 5: How to customize the path of Actuator endpoint? By default, the path of the Actuator endpoint is based on/actuator as a prefix.If you want to customize the path of the endpoint, you can add the following configuration in the Application.properties (or Application.yml) file: properties management.endpoints.web.base-path=/custom/actuator The above configuration will change the basic path of the Actuator endpoint to/Custom/Actuator. Question 6: What are the commonly used Actuator endpoints? Spring Boot provides many commonly used Actuator endpoints, including but not limited to the following: - /Actuator /Health: Show the health state of the application. - /Actuator /Info: Display the information of the application. - /Actuator /Metrics: Display various indicators of the application, such as memory use, HTTP request number, and so on. - /Actuator /MAPPINGS: Show the current URL mapping relationship. - /Actuator /ENV: Show the environment variables of the application. Question 7: How to customize the return content of the endpoint of Actuator? You can write the return content of the defined endpoint by writing the custom endpoint.First, create a custom class that inherits from Endpoint, and then cover the corresponding method to return the customized information. The following is an example: @Component public class CustomEndpoint implements Endpoint<Map<String, Object>> { @Override public String getId() { return "customEndpoint"; } @Override public boolean isEnabled() { return true; } @Override public boolean isSensitive() { return true; } @Override public Map<String, Object> invoke() { Map<String, Object> customInfo = new HashMap<>(); customInfo.put("message", "This is a custom endpoint"); // Add other custom information return customInfo; } } The above code creates a customized endpoint called CUSTENDPOINT, which returns a MAP object containing custom information. Question 8: How to access the customized Actuator endpoint? The path of the self -defined Actuator endpoint can be accessed according to the configuration, such as the `/custom/actuator/CustomEndpoint`.The access to this path will return a customized endpoint information. Question 9: How to open remote shell support? To open remote shell support, you can add the following dependencies: <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-remote-shell</artifactId> </dependency> Use remote shell to connect to the application through SSH and perform some management tasks. The above is the answer to the common questions of Spring Boot Starter Actuator.By using the Spring Boot Starter Actuator, developers can easily monitor and manage the Spring Boot application and provide many useful functions and endpoints.