我已经设置了一个有效的HA Hadoop集群。但是在添加Kerberos身份验证后,datanode无法连接到namenode。
验证Namenode服务器是否成功启动并且没有记录错误。我使用用户' hduser'
启动所有服务$ sudo netstat -tuplen
...
tcp 0 0 10.28.94.150:8019 0.0.0.0:* LISTEN 1001 20218 1518/java
tcp 0 0 10.28.94.150:50070 0.0.0.0:* LISTEN 1001 20207 1447/java
tcp 0 0 10.28.94.150:9000 0.0.0.0:* LISTEN 1001 20235 1447/java
的Datanode
以root身份启动datanode,使用jsvc将服务绑定到特权端口(参见。 Secure Datanode)
$ sudo -E sbin/hadoop-daemon.sh start datanode
starting datanode, logging to /opt/hadoop-2.7.3/logs//hadoop-hduser-datanode-STWHDDN01.out
收到datanode无法连接到namenodes的错误:
...
2018-01-08 09:25:40,051 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: dnUserName = hduser
2018-01-08 09:25:40,052 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: supergroup = supergroup
2018-01-08 09:25:40,114 INFO org.apache.hadoop.ipc.CallQueueManager: Using callQueue class java.util.concurrent.LinkedBlockingQueue
2018-01-08 09:25:40,125 INFO org.apache.hadoop.ipc.Server: Starting Socket Reader #1 for port 50020
2018-01-08 09:25:40,152 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Opened IPC server at /0.0.0.0:50020
2018-01-08 09:25:40,219 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Refresh request received for nameservices: ha-cluster
2018-01-08 09:25:41,189 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Starting BPOfferServices for nameservices: ha-cluster
2018-01-08 09:25:41,226 INFO org.apache.hadoop.ipc.Server: IPC Server Responder: starting
2018-01-08 09:25:41,227 INFO org.apache.hadoop.ipc.Server: IPC Server listener on 50020: starting
2018-01-08 09:25:42,297 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: STWHDRM02/10.28.94.151:9000. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2018-01-08 09:25:42,300 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: STWHDRM01/10.28.94.150:9000. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
datanode hdfs-site.xml(摘录):
<property>
<name>dfs.block.access.token.enable</name>
<value>true</value>
</property>
<property>
<name>dfs.datanode.keytab.file</name>
<value>/opt/hadoop/etc/hadoop/hdfs.keytab</value>
</property>
<property>
<name>dfs.datanode.kerberos.principal</name>
<value>hduser/_HOST@FDATA.COM</value>
</property>
<property>
<name>dfs.datanode.address</name>
<value>0.0.0.0:1004</value>
</property>
<property>
<name>dfs.datanode.http.address</name>
<value>0.0.0.0:1006</value>
</property>
<property>
<name>dfs.datanode.data.dir.perm</name>
<value>700</value>
</property>
我在hadoop-env.sh中设置了HADOOP_SECURE_DN_USER = hduser和JSVC_HOME
datanode上的 hdfs.keytab:
$ klist -ke etc/hadoop/hdfs.keytab Keytab name: FILE:etc/hadoop/hdfs.keytab
KVNO Principal
---- --------------------------------------------------------------------------
1 hduser/stwhddn01@FDATA.COM (aes256-cts-hmac-sha1-96)
1 hduser/stwhddn01@FDATA.COM (aes128-cts-hmac-sha1-96)
1 hduser/stwhddn01@FDATA.COM (des3-cbc-sha1)
1 hduser/stwhddn01@FDATA.COM (arcfour-hmac)
1 hduser/stwhddn01@FDATA.COM (des-hmac-sha1)
1 hduser/stwhddn01@FDATA.COM (des-cbc-md5)
1 HTTP/stwhddn01@FDATA.COM (aes256-cts-hmac-sha1-96)
1 HTTP/stwhddn01@FDATA.COM (aes128-cts-hmac-sha1-96)
1 HTTP/stwhddn01@FDATA.COM (des3-cbc-sha1)
1 HTTP/stwhddn01@FDATA.COM (arcfour-hmac)
1 HTTP/stwhddn01@FDATA.COM (des-hmac-sha1)
1 HTTP/stwhddn01@FDATA.COM (des-cbc-md5)
操作系统:Centos 7 我以root用户身份运行datanode时,它不会使用kerberos进行身份验证。
有什么想法吗?
答案 0 :(得分:1)
我发现了问题。需要更改/ etc / hosts才能将127.0.0.1映射到localhost。
在
127.0.0.1 STWHDDD01
127.0.0.1 localhost
...
在
127.0.0.1 localhost
...
我仍然想知道为什么旧映射在没有Kerberos身份验证的情况下工作。