java通过证书访问etcd的实现步骤
作者:amadeus_liu2
Etcd提供了多种语言的客户端库,本文主要介绍了java通过证书访问etcd的实现步骤,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友们下面随着小编来一起学习学习吧
一、首先,要使用cfssl生成etcd证书相关的文件(ca.pem server.pem server-key.pem ),然后把server-key.pem进行转换:
openssl pkcs8 -topk8 -nocrypt -in server-key.pem -out server.key
二、带证书启动etcd
./etcd --name infra0 --cert-file=/root/server.pem --key-file=/root/server-key.pem --advertise-client-urls=https://0.0.0.0:2379 --listen-client-urls=https://0.0.0.0:2379
可通过etcdctl 进行连接验证
./etcdctl --cacert=/root/ca.pem --cert=/root/server.pem --key=/root/server-key.pem --endpoints="https://10.180.23.10:2379" get Elon
三、在java项目中添加相关依赖,完整依赖类似如下:
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>org.example</groupId> <artifactId>springbootetcd3</artifactId> <version>1.0-SNAPSHOT</version> <properties> <maven.compiler.source>8</maven.compiler.source> <maven.compiler.target>8</maven.compiler.target> </properties> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.6.6</version> <relativePath/> <!-- lookup parent from repository --> </parent> <dependencies> <dependency> <groupId>io.etcd</groupId> <artifactId>jetcd-core</artifactId> <version>0.7.7</version> </dependency> <!-- https://mvnrepository.com/artifact/com.coreos/jetcd-core --> <!-- <dependency> <groupId>com.coreos</groupId> <artifactId>jetcd-core</artifactId> <version>0.0.2</version> </dependency>--> <!-- <dependency> <groupId>io.etcd</groupId> <artifactId>jetcd-core</artifactId> <version>0.5.0</version> </dependency>--> <!-- <dependency> <groupId>io.grpc</groupId> <artifactId>grpc-netty-shaded</artifactId> <version>1.50.0</version> </dependency>--> <!-- https://mvnrepository.com/artifact/io.netty/netty-all --> <dependency> <groupId>io.netty</groupId> <artifactId>netty-all</artifactId> <version>4.1.90.Final</version> </dependency> <!-- https://mvnrepository.com/artifact/io.netty/netty-tcnative --> <dependency> <groupId>io.netty</groupId> <artifactId>netty-tcnative</artifactId> <version>2.0.65.Final</version> </dependency> <!-- https://mvnrepository.com/artifact/io.netty/netty-tcnative-boringssl-static --> <dependency> <groupId>io.netty</groupId> <artifactId>netty-tcnative-boringssl-static</artifactId> <version>2.0.65.Final</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> </dependencies> </project>
四、创建客户端,访问etcd
package cn.edu.tju; import io.etcd.jetcd.ByteSequence; import io.etcd.jetcd.Client; import io.etcd.jetcd.KV; import io.etcd.jetcd.api.PutResponse; import io.grpc.netty.GrpcSslContexts; import io.netty.handler.ssl.SslContext; import java.io.File; import java.io.IOException; import java.util.concurrent.CompletableFuture; import java.util.concurrent.ExecutionException; public class EtcdExample { public static void main(String[] args) throws IOException, ExecutionException, InterruptedException { File cert = new File("d:\\ca.pem"); File keyCertChainFile = new File("d:\\server.pem"); File keyFile = new File("d:\\server.key"); SslContext context = GrpcSslContexts.forClient() .trustManager(cert) .keyManager(keyCertChainFile, keyFile) .build(); Client client = Client.builder() .endpoints("https://xx.xx.xx.xx:2379") .sslContext(context) .build(); ByteSequence key = ByteSequence.from("Elon".getBytes()); ByteSequence value = ByteSequence.from("Musk".getBytes()); // put the key-value client.getKVClient().put(key,value).get(); System.out.println("ok"); } }
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