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This article mainly introduces "how to use Nacos components in SpringBoot2" related knowledge, Xiaobian through the actual case to show you the operation process, the method of operation is simple and fast, practical, I hope that this "how to use Nacos components in SpringBoot2" article can help you solve the problem.

A brief introduction to the basis of Nacos 1. Concept introduction

Nacos is to build a "service"-centric modern application architecture, such as micro-service paradigm, cloud native paradigm and other service infrastructure. Focus on discovering, configuring, and managing microservices. Nacos provides a set of easy-to-use features to help developers quickly implement dynamic service discovery, service configuration, service metadata and traffic management. Agile build, deliver, and manage micro-service platforms.

2. Key characteristics

Dynamic configuration service

Service discovery and service health monitoring

Dynamic DNS service

Service and its metadata management

3. Interpretation of professional terms

Namespace

Used for configuration isolation at tenant granularity. The same configuration of Group or Data ID can exist under different namespaces.

Configuration set

A collection of related or unrelated configuration items is called a configuration set. In a system, a configuration file is usually a configuration set, which contains the configuration of all aspects of the system.

Configuration set ID

The ID of a configuration set in Nacos. The configuration set ID is one of the dimensions that the organization divides into configurations. DataID is typically used to organize the configuration set of partitioned systems.

Configuration grouping

In Nacos, a set of configuration sets that are one of the dimensions of organizational configuration. Group configuration sets with a meaningful string to distinguish between configuration sets with the same Data ID.

Configure Snapshot

Nacos's client SDK generates a snapshot of the configuration locally. When the client cannot connect to the Nacos Server, you can use the configuration snapshot to display the overall disaster recovery capability of the system.

Service registration

A database that stores service instances and service load balancing policies.

Service discovery

Use the service name to detect the address and metadata of the instance under the service, and provide it to the client for query through a predefined interface.

Meta data

Nacos data (such as configuration and service) description information, such as service version, weight, disaster recovery policy, load balancing policy, etc.

4. Nacos biosphere

Nacos seamlessly supports some mainstream open source framework ecology:

Spring Cloud micro-service framework

Dubbo RPC framework

Kubernetes container application

2. Build Nacos environment 1. Environment version

Here, a single Nacos service is built in the Windos environment.

Nacos version: the officially recommended stable version is 1.1.4.

Basic environment: JDK 1.8 destroy Maven 3.2.x

2. Download the environment package

Download the packaged file directly here, or you can download the source code and package it yourself.

Https://github.com/alibaba/nacos/releases

Download file: nacos-server-1.1.4.zip

3. Startup environment

Startup file address: nacos\ bin

Startup file: startup.cmd

Close file: shutdown.cmd

Log in after activation. The account password defaults to nacos/nacos. The effect of the home page is as follows:

Third, integrate SpringBoot2

Note: version 0.2.x.RELEASE corresponds to Spring Boot 2.x, and version 0.1.x.RELEASE corresponds to Spring Boot 1.x.

1. Create a new configuration

2. The core depends on com.alibaba.boot nacos-discovery-spring-boot-starter 0.2.3 com.alibaba.boot nacos-config-spring-boot-starter 0.2.33, Yml configuration file

Here, the project is registered with Nacos as a service.

Nacos: config: server-addr: 127.0.0.1 discovery 8848 discovery: server-addr: 127.0.0.1 purl 88484, startup class configuration

The startup class associates the dataId identity of the configuration center.

@ EnableSwagger2@SpringBootApplication@NacosPropertySource (dataId = "WARE_ID", autoRefreshed = true) public class Application7017 {public static void main (String [] args) {SpringApplication.run (Application7017.class,args);}} 5, core configuration class import com.alibaba.nacos.api.annotation.NacosInjected;import com.alibaba.nacos.api.exception.NacosException;import com.alibaba.nacos.api.naming.NamingService;import org.springframework.beans.factory.annotation.Value;import org.springframework.context.annotation.Configuration Import javax.annotation.PostConstruct;@Configurationpublic class NacosConfig {@ Value ("${server.port}") private int serverPort; @ Value ("${spring.application.name}") private String applicationName; @ NacosInjected private NamingService namingService; @ PostConstruct public void registerInstance () throws NacosException {namingService.registerInstance (applicationName, "127.0.0.1", serverPort);}}

Query the list of services after successful startup:

6. Basic API use case

Two basic uses are demonstrated here: the configuration content reading in step 1 above and the service list reading in step 4. Manage the test interface based on swagger2.

@ Api ("Nacos Interface Management") @ RestController@RequestMapping ("/ nacos") public class NacosController {@ NacosValue (value= "${MyName:null}", autoRefreshed = true) private String myName; @ NacosValue (value= "${project:null}", autoRefreshed = true) private String project; @ ApiOperation (value= "query configuration information") @ GetMapping (value= "/ info") public String info () {return myName+ ":" + project " } @ NacosInjected private NamingService namingService; @ ApiOperation (value= "query Service list") @ GetMapping (value= "/ getServerList") public List getServerList (@ RequestParam String serviceName) {try {return namingService.getAllInstances (serviceName);} catch (Exception e) {e.printStackTrace ();} return null }} this is the end of the introduction to "how to use Nacos components in SpringBoot2". Thank you for reading. If you want to know more about the industry, you can follow the industry information channel. The editor will update different knowledge points for you every day.

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