安全模式下配置Hadoop身份验证

在安全模式下配置Hadoop身份验证需要完成以下步骤：

生成Kerberos认证相关的密钥和凭据：

kdb5_util create -s
ktadd -k /etc/security/keytabs/nn.service.keytab nn/hostname@REALM
ktadd -k /etc/security/keytabs/dn.service.keytab dn/hostname@REALM
ktadd -k /etc/security/keytabs/jhs.service.keytab jhs/hostname@REALM
ktadd -k /etc/security/keytabs/rm.service.keytab rm/hostname@REALM
ktadd -k /etc/security/keytabs/nm.service.keytab nm/hostname@REALM
ktadd -k /etc/security/keytabs/spnego.service.keytab HTTP/hostname@REALM

配置Kerberos客户端：

vi /etc/krb5.conf
[libdefaults]
default_realm = REALM
dns_lookup_realm = false
dns_lookup_kdc = false
ticket_lifetime = 86400
renew_lifetime = 604800
forwardable = true
default_tgs_enctypes = aes256-cts-hmac-sha1-96 rc4-hmac des-cbc-crc des-cbc-md5
default_tkt_enctypes = aes256-cts-hmac-sha1-96 rc4-hmac des-cbc-crc des-cbc-md5
permitted_enctypes = aes256-cts-hmac-sha1-96 rc4-hmac des-cbc-crc des-cbc-md5
udp_preference_limit = 1
[realms]
REALM = {
kdc = kdc-hostname:88
admin_server = kdc-hostname:749
}
[domain_realm]
.hostname = REALM
hostname = REALM

配置Hadoop客户端：

vi $HADOOP_HOME/etc/hadoop/core-site.xml
<configuration>
<property>
<name>hadoop.security.authentication</name>
<value>kerberos</value>
</property>
<property>
<name>hadoop.security.authorization</name>
<value>true</value>
</property>
<property>
<name>hadoop.security.auth_to_local</name>
<value>RULE:[2:$1@$0](.*@REALM)s/@.*//DEFAULT/</value>
</property>
</configuration>
vi $HADOOP_HOME/etc/hadoop/hdfs-site.xml
<configuration>
<property>
<name>dfs.namenode.kerberos.principal</name>
<value>nn/hostname@REALM</value>
</property>
<property>
<name>dfs.namenode.keytab.file</name>
<value>/etc/security/keytabs/nn.service.keytab</value>
</property>
<property>
<name>dfs.datanode.kerberos.principal</name>
<value>dn/hostname@REALM</value>
</property>
<property>
<name>dfs.datanode.keytab.file</name>
<value>/etc/security/keytabs/dn.service.keytab</value>
</property>
</configuration>
vi $HADOOP_HOME/etc/hadoop/yarn-site.xml
<configuration>
<property>
<name>yarn.resourcemanager.keytab</name>
<value>/etc/security/keytabs/rm.service.keytab</value>
</property>
<property>
<name>yarn.resourcemanager.principal</name>
<value>rm/hostname@REALM</value>
</property>
<property>
<name>yarn.nodemanager.keytab</name>
<value>/etc/security/keytabs/nm.service.keytab</value>
</property>
<property>
<name>yarn.nodemanager.principal</name>
<value>nm/hostname@REALM</value>
</property>
</configuration>
vi $HADOOP_HOME/etc/hadoop/mapred-site.xml
<configuration>
<property>
<name>mapreduce.jobhistory.keytab</name>
<value>/etc/security/keytabs/jhs.service.keytab</value>
</property>
<property>
<name>mapreduce.jobhistory.principal</name>
<value>jhs/hostname@REALM</value>
</property>
</configuration>

启动Kerberos并检查是否成功：

kadmin.local
start

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