问题导读
1.如何生成zookeeper.keytab?
2. zookeeper 配置文件需修改哪些内容?
3.ZooKeeper Client配置 keytab需要哪些步骤?
安装 hadoop 集群,集群包括三个节点,每个节点的ip、主机名和部署的组件分配如下:
- 192.168.56.121 cdh1 NameNode、Hive、ResourceManager、HBase、impala-state-store、impala-catalog、Kerberos Server、zookeeper-server
- 192.168.56.122 cdh2 DataNode、SSNameNode、NodeManager、HBase、impala-server、zookeeper-server
- 192.168.56.123 cdh3 DataNode、HBase、NodeManager、impala-server、zookeeper-server
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1. 配置 ZooKeeper Server1.1 生成 keytab在 cdh1 节点,即 KDC server 节点上执行下面命令: - $ cd /var/kerberos/krb5kdc/
-
- kadmin.local -q "addprinc -randkey zookeeper/cdh1@JAVACHEN.COM "
- kadmin.local -q "addprinc -randkey zookeeper/cdh2@JAVACHEN.COM "
- kadmin.local -q "addprinc -randkey zookeeper/cdh3@JAVACHEN.COM "
-
- kadmin.local -q "xst -k zookeeper.keytab zookeeper/cdh1@JAVACHEN.COM "
- kadmin.local -q "xst -k zookeeper.keytab zookeeper/cdh2@JAVACHEN.COM "
- kadmin.local -q "xst -k zookeeper.keytab zookeeper/cdh3@JAVACHEN.COM "
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拷贝 zookeeper.keytab 文件到其他节点的 /etc/zookeeper/conf 目录: - $ scp zookeeper.keytab cdh1:/etc/zookeeper/conf
- $ scp zookeeper.keytab cdh2:/etc/zookeeper/conf
- $ scp zookeeper.keytab cdh3:/etc/zookeeper/conf
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并设置权限,分别在 cdh1、cdh2、cdh3 上执行: - $ ssh cdh1 "cd /etc/zookeeper/conf/;chown zookeeper:hadoop zookeeper.keytab ;chmod 400 *.keytab"
- $ ssh cdh2 "cd /etc/zookeeper/conf/;chown zookeeper:hadoop zookeeper.keytab ;chmod 400 *.keytab"
- $ ssh cdh3 "cd /etc/zookeeper/conf/;chown zookeeper:hadoop zookeeper.keytab ;chmod 400 *.keytab"
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由于 keytab 相当于有了永久凭证,不需要提供密码(如果修改 kdc 中的 principal 的密码,则该 keytab 就会失效),所以其他用户如果对该文件有读权限,就可以冒充 keytab 中指定的用户身份访问 hadoop,所以 keytab 文件需要确保只对 owner 有读权限(0400) 1.2 修改 zookeeper 配置文件在 cdh1 节点上修改 /etc/zookeeper/conf/zoo.cfg 文件,添加下面内容: - authProvider.1=org.apache.zookeeper.server.auth.SASLAuthenticationProvider
- jaasLoginRenew=3600000
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将修改的上面文件同步到其他节点:cdh2、cdh3: - $ scp /etc/zookeeper/conf/zoo.cfg cdh2:/etc/zookeeper/conf/zoo.cfg
- $ scp /etc/zookeeper/conf/zoo.cfg cdh3:/etc/zookeeper/conf/zoo.cfg
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1.3 创建 JAAS 配置文件在 cdh1 的配置文件目录创建 jaas.conf 文件,内容如下: - Server {
- com.sun.security.auth.module.Krb5LoginModule required
- useKeyTab=true
- keyTab="/etc/zookeeper/conf/zookeeper.keytab"
- storeKey=true
- useTicketCache=false
- principal="zookeeper/cdh1@JAVACHEN.COM";
- };
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同样,在 cdh2 和 cdh3 节点也创建该文件,注意每个节点的 principal 有所不同。 然后,在 /etc/zookeeper/conf/ 目录创建 java.env,内容如下: - export JVMFLAGS="-Djava.security.auth.login.config=/etc/zookeeper/conf/jaas.conf"
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并将该文件同步到其他节点: - $ scp /etc/zookeeper/conf/java.env cdh2:/etc/zookeeper/conf/java.env
- $ scp /etc/zookeeper/conf/java.env cdh3:/etc/zookeeper/conf/java.env
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1.4 重启服务依次重启,并观察日志: - /etc/init.d/zookeeper-server restart
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2. 配置 ZooKeeper Client2.1 生成 keytab在 cdh1 节点,即 KDC server 节点上执行下面命令: - $ cd /var/kerberos/krb5kdc/
- kadmin.local -q "addprinc -randkey zkcli/cdh1@JAVACHEN.COM "
- kadmin.local -q "addprinc -randkey zkcli/cdh2@JAVACHEN.COM "
- kadmin.local -q "addprinc -randkey zkcli/cdh3@JAVACHEN.COM "
-
- kadmin.local -q "xst -k zkcli.keytab zkcli/cdh1@JAVACHEN.COM "
- kadmin.local -q "xst -k zkcli.keytab zkcli/cdh2@JAVACHEN.COM "
- kadmin.local -q "xst -k zkcli.keytab zkcli/cdh3@JAVACHEN.COM "
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拷贝 zkcli.keytab 文件到其他节点的 /etc/zookeeper/conf 目录: - $ scp zkcli.keytab cdh1:/etc/zookeeper/conf
- $ scp zkcli.keytab cdh2:/etc/zookeeper/conf
- $ scp zkcli.keytab cdh3:/etc/zookeeper/conf
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并设置权限,分别在 cdh1、cdh2、cdh3 上执行: - $ ssh cdh1 "cd /etc/zookeeper/conf/;chown zookeeper:hadoop zkcli.keytab ;chmod 400 *.keytab"
- $ ssh cdh2 "cd /etc/zookeeper/conf/;chown zookeeper:hadoop zkcli.keytab ;chmod 400 *.keytab"
- $ ssh cdh3 "cd /etc/zookeeper/conf/;chown zookeeper:hadoop zkcli.keytab ;chmod 400 *.keytab"
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由于 keytab 相当于有了永久凭证,不需要提供密码(如果修改 kdc 中的 principal 的密码,则该 keytab 就会失效),所以其他用户如果对该文件有读权限,就可以冒充 keytab 中指定的用户身份访问 hadoop,所以 keytab 文件需要确保只对 owner 有读权限(0400) 2.2 创建 JAAS 配置文件在 cdh1 的配置文件目录 /etc/zookeeper/conf/ 创建 client-jaas.conf 文件,内容如下: - Client {
- com.sun.security.auth.module.Krb5LoginModule required
- useKeyTab=true
- keyTab="/etc/zookeeper/conf/zkcli.keytab"
- storeKey=true
- useTicketCache=false
- principal="zkcli@JAVACHEN.COM";
- };
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同步到其他节点: - $ scp client-jaas.conf cdh2:/etc/zookeeper/conf
- $ scp client-jaas.conf cdh3:/etc/zookeeper/conf
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然后,在 /etc/zookeeper/conf/ 目录创建或者修改 java.env,内容如下: - export CLIENT_JVMFLAGS="-Djava.security.auth.login.config=/etc/zookeeper/conf/client-jaas.conf"
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如果,zookeeper-client 和 zookeeper-server 安装在同一个节点上,则 java.env 中的 java.security.auth.login.config 参数会被覆盖,这一点从 zookeeper-client 命令启动日志可以看出来。
并将该文件同步到其他节点: - $ scp /etc/zookeeper/conf/java.env cdh2:/etc/zookeeper/conf/java.env
- $ scp /etc/zookeeper/conf/java.env cdh3:/etc/zookeeper/conf/java.env
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2.3 验证启动客户端: - $ zookeeper-client -server cdh1:2181
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创建一个 znode 节点: - k: cdh1:2181(CONNECTED) 0] create /znode1 sasl:zkcli@JAVACHEN.COM:cdwra
- Created /znode1
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验证该节点是否创建以及其 ACL: - [zk: cdh1:2181(CONNECTED) 1] getAcl /znode1
- 'world,'anyone
- : cdrwa
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