java api访问kerberos认证的hbase

去集群机器上拷贝4个文件：

• core-site.xml (hadoop核心配置)
• hbase-site.xml (hbase配置)
• emr.keytab (kerberos密钥信息)
• krb5.conf (kerberos认证服务器信息)

java代码

import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
import org.apache.hadoop.security.UserGroupInformation;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Lazy;

import java.io.IOException;

@ConfigurationProperties(prefix = "spring.hbase")
@Configuration
@Data
@Slf4j
public class HbaseConfiguration {
    private String kerberosKeytab;

    private String kerberosUserName;

    private String kerberosConf;

    private String coreSitePath;

    private String hbaseSitePath;

    public org.apache.hadoop.conf.Configuration configuration() throws IOException {
        org.apache.hadoop.conf.Configuration conf = HBaseConfiguration.create();
        System.setProperty("java.security.krb5.conf", kerberosConf);
        System.setProperty("sun.security.krb5.debug", "true");
        conf.set("hadoop.security.authentication", "kerberos");

        conf.addResource(new Path(coreSitePath));
        conf.addResource(new Path(hbaseSitePath));

        UserGroupInformation.setConfiguration(conf);
        UserGroupInformation.loginUserFromKeytab(kerberosUserName, kerberosKeytab);

        return conf;
    }

    @Bean
    @Lazy
    public Admin admin() {
        Admin admin = null;
        try {
            Connection connection = ConnectionFactory.createConnection(configuration());
            admin = connection.getAdmin();
        } catch (IOException e) {
            log.error("hbase admin init error:".concat(e.getMessage()), e);
        }
        return admin;
    }
}

配置文件

spring:
  hbase:
    kerberosKeytab: /home/kerberos/emr-test.keytab
    kerberosUserName: hadoop/10.16.0.74@EMR-G2RIQ4HC
    kerberosConf: /home/kerberos/krb5-test.conf
    coreSitePath: /home/kerberos/core-site-test.xml
    hbaseSitePath: /home/kerberos/hbase-site-test.xml

这里注意下，kerberosUserName属性里是hbase-site.xml里边的hbase.master.hostname与hbase.master.kerberos.principal组合起来的值，不要搞错

pom.xml配置，把resource目录下的kerberos文件移动到指定目录，方便在dockerfile文件操作打包镜像，不要直接使用resource下边的文件，程序很容易识别不到，避免出错，少踩坑

    <build>
        <finalName>${project.name}</finalName>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <excludes>
                    <exclude>kerberos/</exclude>
                </excludes>
                <filtering>true</filtering>
            </resource>
        </resources>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <!--资源管理插件-->
                <artifactId>maven-resources-plugin</artifactId>
                <executions>
                    <execution>
                        <id>copy-resources</id>
                        <phase>package</phase>
                        <goals>
                            <goal>copy-resources</goal>
                        </goals>
                        <configuration>
                            <resources>
                                <resource>
                                    <!--源文件目录-->
                                    <directory>src/main/resources/kerberos</directory>
                                </resource>
                            </resources>
                            <!--输出的资源目录-->
                            <outputDirectory>${project.build.directory}/kerberos</outputDirectory>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

备注：有的人不喜欢用这种xml方式，喜欢用最简配置去搞，从xml里边获取部分参数，直接在代码里边写，这种也没有问题，缺点的话可能缺少某些配置需要重复去测试，浪费时间

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