我正在尝试HDFS的Hadoop 2高可用性。我在用户hafence下的NameNode之间建立了无密码ssh连接。我验证了-并且有效。但是，使用此sshfence设置时，我正在关注(权限被拒绝)。
2014-01-20 12:54:47,101 INFO ha.NodeFencer (NodeFencer.java:fence(91)) - ====== Beginning Service Fencing Process... ======
2014-01-20 12:54:47,101 INFO ha.NodeFencer (NodeFencer.java:fence(94)) - Trying method 1/1: org.apache.hadoop.ha.SshFenceByTcpPort(hafence:22)
2014-01-20 12:54:47,101 WARN ha.SshFenceByTcpPort (SshFenceByTcpPort.java:tryFence(93)) - Unable to create SSH session
com.jcraft.jsch.JSchException: java.io.FileNotFoundException: /home/hafence/.ssh/id_rsa (Permission denied)
at com.jcraft.jsch.IdentityFile.newInstance(IdentityFile.java:98)
at com.jcraft.jsch.JSch.addIdentity(JSch.java:206)
at com.jcraft.jsch.JSch.addIdentity(JSch.java:192)
at org.apache.hadoop.ha.SshFenceByTcpPort.createSession(SshFenceByTcpPort.java:122)
at org.apache.hadoop.ha.SshFenceByTcpPort.tryFence(SshFenceByTcpPort.java:91)
at org.apache.hadoop.ha.NodeFencer.fence(NodeFencer.java:97)
at org.apache.hadoop.ha.ZKFailoverController.doFence(ZKFailoverController.java:521)
at org.apache.hadoop.ha.ZKFailoverController.fenceOldActive(ZKFailoverController.java:494)
at org.apache.hadoop.ha.ZKFailoverController.access$1100(ZKFailoverController.java:59)
at org.apache.hadoop.ha.ZKFailoverController$ElectorCallbacks.fenceOldActive(ZKFailoverController.java:837)
at org.apache.hadoop.ha.ActiveStandbyElector.fenceOldActive(ActiveStandbyElector.java:900)
at org.apache.hadoop.ha.ActiveStandbyElector.becomeActive(ActiveStandbyElector.java:799)
at org.apache.hadoop.ha.ActiveStandbyElector.processResult(ActiveStandbyElector.java:415)
at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:596)
at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:495)
Caused by: java.io.FileNotFoundException: /home/hafence/.ssh/id_rsa (Permission denied)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:138)
at java.io.FileInputStream.<init>(FileInputStream.java:97)
at com.jcraft.jsch.IdentityFile.newInstance(IdentityFile.java:83)
... 14 more
2014-01-20 12:54:47,102 WARN ha.NodeFencer (NodeFencer.java:fence(108)) - Fencing method org.apache.hadoop.ha.SshFenceByTcpPort(hafence:22) was unsuccessful.
2014-01-20 12:54:47,102 ERROR ha.NodeFencer (NodeFencer.java:fence(111)) - Unable to fence service by any configured method.
2014-01-20 12:54:47,102 WARN ha.ActiveStandbyElector (ActiveStandbyElector.java:becomeActive(807)) - Exception handling the winning of election
我的配置在hdfs-site.xml中如下所示:
<property>
<name>dfs.ha.fencing.methods</name>
<value>sshfence(hafence:22)</value>
</property>
<property>
<name>dfs.ha.fencing.ssh.private-key-files</name>
<value>/home/hafence/.ssh/id_rsa</value>
</property>
<property>
<name>dfs.ha.fencing.ssh.connect-timeout</name>
<value>30000</value>
</property>
<property>
<name>dfs.ha.automatic-failover.enabled</name>
<value>true</value>
</property>
为了使sshfence起作用，权限要求，用户等是什么？
最佳答案
由于hadoop是从RPM软件包安装的。我们使用hdfs用户(包括密码少了auth)进行sshfence，然后sshfence开始起作用。