020-spring Boot Monitoring and metrics

I. Overview

Use actuator to view monitoring and metrics information by configuration

Second, use 2.1, build Web projects, add Pom

        < Dependency >            < groupId >org.springframework.boot</groupId>            <  Artifactid>spring-boot-starter-web</artifactid>        </dependency>

Start the project, view the log, and find the access address as follows

2.2, increase the pom dependence of actuator

        < Dependency >            < groupId >org.springframework.boot</groupId>            <  Artifactid>spring-boot-actuator</artifactid>        </ Dependency >

Start the project, view the log, and find the access address as follows

　　

As you can see, the accessible address has increased

Third, detailed

We recommend installing the Jsonview plugin for easy viewing of JSON

3.1. Add configuration

Close permission limit, application.properties

Management.security.enabled=false

3.2. Visit the following URL

The key feature of Spring Boot actuator is that it provides many WEB interfaces in the application to understand the internal state of the application as it runs. Actuator provides the following interfaces, which can be divided into three main categories: Configuration interfaces, metric interfaces, and other interfaces, as shown in the following table.

http Method	Path		Description	authentication
GET	/auditevents		Audit events	True
GET	/autoconfig	Configuration	View the usage of automatic configuration Provides an automated configuration report that records which automatic configuration conditions have passed and which failed	True
GET	/configprops	Configuration	View configuration properties, including default configuration Describes how configuration properties (including default values) are injected into a bean	True
GET	/beans	Configuration	View a list of beans and their relationships Describe all the beans in the application context, and their relationships	True
GET	/dump		Print line stacks, get snapshot of thread activity	True
GET	/env	Configuration	View all environment variables	True
GET	/env/{name}	Configuration	Get specific environment property values by name	True
GET	/health	Configuration	View the app health metrics, which are provided by the Healthindicator implementation class Including: Cassandra, Composite, Couchbase, DataSource, DiskSpace, Elasticsearch, Jms, Ldap, Mail, Mongo, Ordered, Rabbit, Redis, SOLR	False
GET	/heapdump			True
GET	/info	Configuration	View application information, which is provided by the attributes that begin with info	False
GET	/loggers			True
GET	/loggers/{name}			True
POST	/loggers/{name}			True
GET	/mappings		View all URL mappings and mappings between them and the controller (including actuator endpoints)	True
GET	/metrics	Measure	Report various application metrics, such as memory usage and HTTP request count	True
GET	/metrics/{name}	Measure	Report application metrics for the specified name	True
POST	/shutdown		To close the app, ask Endpoints.shutdown.enabled to set to True	True
GET	/trace		View basic tracking information, providing basic HTTP request tracking information (timestamp, HTTP prime)	True

3.3. Source view

Under Org.springframework.boot.actuate.endpoint in the Spring-boot-actuator-1.5.9.release.jar package, look at the specific class implementation,

You can set whether an item is displayed

Endpoints.beans.enabled=false

View the code here endpoints, all inherited from Abstractendpoint, where Abstractendpoint contains attributes as follows

Sensitive sensitive information  enabled

3.3.1, Org.springframework.boot.actuate.health

Extensions are supported in addition to the previously supported health checks. Healthindicator

Steps:

1 "Implement Healthindicator interface, implement logic, and incorporate into spring container management

@Component  Public class Implements healthindicator {    @Override    Public Health Health  () {        //  Return Health.down (). Withdetail ("Error", "Spring Test Error"). Build ();        return Health.up (). Withdetail ("Success", "Spring Test Success"). Build ();}    }

3.3.2, Info

configurations that begin with info in all the loaded profiles can be displayed here, as

Info.name=myinfoinfo.version=1.0.0info.datasource.url=jdbc:mysql://  127.0.0.1:3306/springboot

Git information is also displayed git.properties

Git.branch=master

Shown below

"Jdbc:mysql://127.0.0.1:3306/springboot""root" "Root" "Com.mysql.jdbc.Driver"  "MyInfo""1.0.0" "Master" }}

3.3.3, metrics viewing metric information

Counterservice: Count service, can be used directly

See the number of user/home visits above

    @Autowired    private  counterservice counterservice;//introduced    @GetMapping ("/user /home"    )public string (@RequestParam (" Error ") string error) {        Counterservice.increment("User.home.request.count");//Buried        point if(error.equals ("Test ")) {            thrownew  nullpointerexception ();        }         return "Home";    }

View Now: Http://127.0.0.1:8080/metrics

Gaugeservice: Used to count a value to see the value of a monitoring point

    @Autowired    private  gaugeservice gaugeservice;    @GetMapping ("/user/create")    public String Create (int age  ) {        Gaugeservice.submit ("User.create.age", age);         return "Create";    }

View Now: Http://127.0.0.1:8080/metrics

3.3.4, monitoring information output other locations

1. Add the configuration class as follows

@Configuration  Public class exportconfiguration {    @Bean    @ExportMetricWriter    public  metricwriter Createmetricwriter (Mbeanexporter exporter) {        returnnew  Jmxmetricwriter ( exporter);}    }

View Metricwriter supports the following types of support, or you can define your own

　　

JMX is used here.

Iv. Use of JDK tools

View JMX mode JDK with three types under Bin, JConsole, JMC, JVISUALVM

Jconsole Way

　　

JVISUALVM Way

Note JVISUALVM default does not support Mbean,jconsole, etc. need to install their own plug-in, the tool → plug-in installation of plug-ins

　　

JMC Way

　　

Note: These three tools are not only able to view the Mbean, other information can also be viewed, and the page content view consistent.

Not related to Jmx configured above, configuring JMX only adds Metricwriter entries

020-spring Boot Monitoring and metrics