20th Chapter Springboot + Consul (1)

Consul specific installation and Operation View Blog's Consul series.

First, start consul

(1 server+1 client, convenience, client using this machine): View: http://www.cnblogs.com/java-zhao/p/5375132.html

1. Turn on the virtual machine and switch to the node configured in Vagrantfile

• Vagrant up
• Vagrant SSH n110

2. Start Server (n110)

• Consul Agent -server-bootstrap-expect=1 -data-dir=/tmp/consul-node=server-110-bind=192.168.21.110-dc= ZJGDC1 -client 0.0.0.0-ui

Description:-client 0 0 0 0-ui--> enables clients to access the server-side consul UI directly through a URL

3. Start Client (local)

• Consul AGENT-DATA-DIR=/TMP/CONSUL-NODE=CLIENT-MY-BIND=XXX-DC=ZJGDC1

Description: XXX stands for native IP

4. Client Joins server

• Consul Join 192.168.21.110

Second, the Java part

1, Pom.xml

<!--consul-client -        <Dependency>            <groupId>Com.orbitz.consul</groupId>            <Artifactid>Consul-client</Artifactid>            <version>0.10.0</version>        </Dependency>        <!--Consul Required Packages -        <Dependency>            <groupId>Org.glassfish.jersey.core</groupId>            <Artifactid>Jersey-client</Artifactid>            <version>2.22.2</version>        </Dependency>

Description: There are two Java clients for consul: Consul-client and Consul-api.

Consul-client's github address: https://github.com/OrbitzWorldwide/consul-client

2, Consulservice

 PackageCom.xxx.firstboot.service;Importjava.net.MalformedURLException;ImportJava.net.URI;Importjava.util.List;ImportOrg.springframework.stereotype.Service;Importcom.orbitz.consul.AgentClient;ImportCom.orbitz.consul.Consul;Importcom.orbitz.consul.HealthClient;Importcom.orbitz.consul.KeyValueClient;//import com.orbitz.consul.NotRegisteredException;Importcom.orbitz.consul.StatusClient;Importcom.orbitz.consul.model.health.ServiceHealth; @Service Public classConsulservice {/*** Registration Service * and Health check of the service * ServiceName only * serviceId: no effect found*/     Public voidRegisterservice (String serviceName, String serviceId) {Consul Consul= Consul.builder (). build ();//Establishing consul InstancesAgentclient agentclient = Consul.agentclient ();//Establish Agentclient                Try {            /*** Note that the registration interface: * Need to provide a health check of the service URL, and how often to access the service (here is 3s)*/Agentclient.register (8080, uri.create ("Http://localhost:8080/health"). Tourl (), 3, ServiceName, serviceId, "Dev"); } Catch(malformedurlexception e) {e.printstacktrace (); }//try {//Agentclient.pass (serviceId);//Health Check//} catch (Notregisteredexception e) {//e.printstacktrace ();//        }    }        /*** Discovery of available Services*/     PublicList<servicehealth>Findhealthyservice (String servicename) {Consul Consul=Consul.builder (). build (); Healthclient healthclient= Consul.healthclient ();//access to all healthy services        returnHealthclient.gethealthyserviceinstances (servicename). GetResponse ();//finding nodes in the passing State    }        /*** Storage kv*/     Public voidstorekv (string key, String value) {Consul Consul=Consul.builder (). build (); Keyvalueclient kvclient=consul.keyvalueclient (); Kvclient.putvalue (key, value);//Storage kv    }        /*** Get value based on key*/     Publicstring getkv (String key) {Consul Consul=Consul.builder (). build (); Keyvalueclient kvclient=consul.keyvalueclient (); returnkvclient.getvalueasstring (key). get (); }        /*** Identify the nodes that are consistent (should be all server nodes in the same DC)*/     PublicList<string>findraftpeers () {statusclient statusclient=Consul.builder (). Build (). Statusclient (); returnstatusclient.getpeers (); }        /*** Get leader*/     PublicString Findraftleader () {statusclient statusclient=Consul.builder (). Build (). Statusclient (); returnStatusclient.getleader (); }    }

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Lists the common APIs.

Attention:

• The service does not need to pass IP when registering
• The URL and interval of the health check must be given when the service is registered. The URL is a service (to provide the service, you need to use Spring boot actuator, as follows:).

Add directly to the POMX.ML:

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

After restarting the app, visit Http://localhost:8080/health and get a JSON string with the following result:

{status: ' Up ', DiskSpace:-{status: ' Up ', Total:249769230336,free:182003318784,threshold:10485760},rabbit:-{status: "Up", Version: "3.6.1"},mongo:-{status: ' Up ', Version: ' 3.2.6 '},db:-{status: ' Up ', Mytestdbdatasource:-{status: ' Up ', D Atabase: "MySQL", Hello:1},mytestdb2datasource:-{status: "Up", Database: "MySQL", Hello:1},datasource:-{status: ' Up ', Database: "MySQL", Hello:1}},_links:-{self:-{href: "http://localhost:8080/health"}}}format online

Description:Status

• Up: The server is OK (as long as there is one component down, the server is down, so I need to start MONGO and RABBITMQ on the server, here I used the two components)
• Down: Server hangs

3, Consulcontroller

 PackageCom.xxx.firstboot.web;Importjava.util.List;Importorg.springframework.beans.factory.annotation.Autowired;Importorg.springframework.web.bind.annotation.PathVariable;Importorg.springframework.web.bind.annotation.RequestMapping;ImportOrg.springframework.web.bind.annotation.RequestMethod;ImportOrg.springframework.web.bind.annotation.RestController;ImportCom.orbitz.consul.model.health.ServiceHealth;ImportCom.xxx.firstboot.service.ConsulService;ImportIo.swagger.annotations.Api;Importio.swagger.annotations.ApiOperation; @Api ("Consul related APIs") @RestController @requestmapping ("/consul") Public classConsulcontroller {@AutowiredPrivateConsulservice Consulservice; /******************************* Service Registration and Discovery *******************************/@ApiOperation ("Registration Service") @RequestMapping (value= "/registerservice/{servicename}/{serviceid}", method=requestmethod.post) Public voidRegisterservice (@PathVariable ("ServiceName") String ServiceName, @PathVariable ("Serviceid"String serviceId) {consulservice.registerservice (serviceName, serviceId); } @ApiOperation ("Discovery Services") @RequestMapping (value= "/discoverservice/{servicename}", method=requestmethod.get) PublicList<servicehealth> Discoverservice (@PathVariable ("ServiceName") String serviceName) {returnConsulservice.findhealthyservice (serviceName); }        /*******************************kv*******************************/@ApiOperation ("Store KV") @RequestMapping (value= "/kv/{key}/{value}", method=requestmethod.post) Public voidSTOREKV (@PathVariable ("Key") String key, @PathVariable ("Value"String value) {CONSULSERVICE.STOREKV (key, value); } @ApiOperation ("Get KV") @RequestMapping (value= "/kv/{key}", method=requestmethod.get) PublicString getkv (@PathVariable ("Key") (String key) {returnconsulservice.getkv (key); }    /*******************************server*******************************/@ApiOperation ("Get all server nodes in the same DC") @RequestMapping (value= "/raftpeers", method=requestmethod.get) PublicList<string>findraftpeers () {returnconsulservice.findraftpeers (); } @ApiOperation ("Get Leader") @RequestMapping (value= "/leader", method=requestmethod.get) PublicString leader () {returnConsulservice.findraftleader (); }}

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4, test (through swagger test + through the Consul UI view results)

• Swagger:http://localhost:8080/swagger-ui.html
• Consul ui:http://192.168.21.110:8500/ui/

Shows everything the Consul UI has to show. Services, nodes, KV, Datacenter

20th Chapter Springboot + Consul (1)