ambari2.7.4安装namenode HA 步骤及踩坑

hdfs界面点击action
点击enable namenode HA
输入namespace ID
选择安装位置
检查配置
执行命令（此处为一个坑）
安装所需组件
初始化JournalNodes文件夹

会有报错 Could not initialinze shared edits dir ，因为对应文件夹下不为空，查看网上解决方案为格式化namenode，我没管，直接点了next.
启动主节点组件
主节点执行hdfs zkfc -formatZK 在安装另外一个namenode节点执行hdfs namenode -boostrapStandby
然后下一步开始有几点坑

坑一：新加的namenode无法启动，报错8020端口连接不上没有active的namenode

2021-01-28 15:20:56,127 - Getting jmx metrics from NN failed. URL: http://aisino-slave01.test.com:50070/jmx?qry=Hadoop:service=NameNode,name=FSNamesystem
Traceback (most recent call last):
  File "/usr/lib/ambari-agent/lib/resource_management/libraries/functions/jmx.py", line 38, in get_value_from_jmx
    _, data, _ = get_user_call_output(cmd, user=run_user, quiet=False)
  File "/usr/lib/ambari-agent/lib/resource_management/libraries/functions/get_user_call_output.py", line 62, in get_user_call_output
    raise ExecutionFailed(err_msg, code, files_output[0], files_output[1])
ExecutionFailed: Execution of 'curl -s 'http://aisino-slave01.test.com:50070/jmx?qry=Hadoop:service=NameNode,name=FSNamesystem' 1>/tmp/tmpCiS8Ie 2>/tmp/tmpU6EWZq' returned 7. 

21/01/28 15:49:40 INFO ipc.Client: Retrying connect to server: aisino-slave01.test.com/10.70.12.104:8020. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=1, sleepTime=1000 MILLISECONDS)
Operation failed: Call From aisino-slave01.test.com/10.70.12.104 to aisino-slave01.test.com:8020 failed on connection exception: java.net.ConnectException: Connection refused; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused
2021-01-28 15:49:40,626 - call returned (255, '21/01/28 15:49:40 INFO ipc.Client: Retrying connect to server: aisino-slave01.test.com/10.70.12.104:8020. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=1, sleepTime=1000 MILLISECONDS)\nOperation failed: Call From aisino-slave01.test.com/10.70.12.104 to aisino-slave01.test.com:8020 failed on connection exception: java.net.ConnectException: Connection refused; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused')
2021-01-28 15:49:40,627 - NameNode HA states: active_namenodes = [], standby_namenodes = [(u'nn1', 'aisino-master.test.com:50070')], unknown_namenodes = [(u'nn2', 'aisino-slave01.test.com:50070')]
2021-01-28 15:49:40,627 - Will retry 3 time(s), caught exception: No active NameNode was found.. Sleeping for 5 sec(s)

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起初还查看日志

2021-01-28 15:19:45,675 ERROR namenode.NameNode (NameNode.java:main(1715)) - Failed to start namenode.
java.io.FileNotFoundException: /hadoop/hdfs/namenode/current/VERSION (Permission denied)
	at java.io.RandomAccessFile.open0(Native Method)
	at java.io.RandomAccessFile.open(RandomAccessFile.java:316)
	at java.io.RandomAccessFile.<init>(RandomAccessFile.java:243)
	at org.apache.hadoop.hdfs.server.common.StorageInfo.readPropertiesFile(StorageInfo.java:250)
	at org.apache.hadoop.hdfs.server.namenode.NNStorage.readProperties(NNStorage.java:660)
	at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverStorageDirs(FSImage.java:388)
	at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:227)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:1090)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:714)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:632)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:694)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:937)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:910)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1643)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1710)

chown hdfs:hadoop -R /hadoop/hdfs/

解决方法
第6步坑，关闭datanode 安全模式命令enter改为 leave，然后retry即可

坑二：ZKFAILOVERCONTROLLER 页面启动不了
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Traceback (most recent call last):
  File "/var/lib/ambari-agent/cache/stacks/HDP/3.0/services/HDFS/package/scripts/zkfc_slave.py", line 201, in <module>
    ZkfcSlave().execute()
  File "/usr/lib/ambari-agent/lib/resource_management/libraries/script/script.py", line 352, in execute
    method(env)
  File "/var/lib/ambari-agent/cache/stacks/HDP/3.0/services/HDFS/package/scripts/zkfc_slave.py", line 75, in start
    ZkfcSlaveDefault.start_static(env, upgrade_type)
  File "/var/lib/ambari-agent/cache/stacks/HDP/3.0/services/HDFS/package/scripts/zkfc_slave.py", line 100, in start_static
    create_log_dir=True
  File "/var/lib/ambari-agent/cache/stacks/HDP/3.0/services/HDFS/package/scripts/utils.py", line 261, in service
    Execute(daemon_cmd, not_if=process_id_exists_command, environment=hadoop_env_exports)
  File "/usr/lib/ambari-agent/lib/resource_management/core/base.py", line 166, in __init__
    self.env.run()
  File "/usr/lib/ambari-agent/lib/resource_management/core/environment.py", line 160, in run
    self.run_action(resource, action)
  File "/usr/lib/ambari-agent/lib/resource_management/core/environment.py", line 124, in run_action
    provider_action()
  File "/usr/lib/ambari-agent/lib/resource_management/core/providers/system.py", line 263, in action_run
    returns=self.resource.returns)
  File "/usr/lib/ambari-agent/lib/resource_management/core/shell.py", line 72, in inner
    result = function(command, **kwargs)
  File "/usr/lib/ambari-agent/lib/resource_management/core/shell.py", line 102, in checked_call
    tries=tries, try_sleep=try_sleep, timeout_kill_strategy=timeout_kill_strategy, returns=returns)
  File "/usr/lib/ambari-agent/lib/resource_management/core/shell.py", line 150, in _call_wrapper
    result = _call(command, **kwargs_copy)
  File "/usr/lib/ambari-agent/lib/resource_management/core/shell.py", line 314, in _call
    raise ExecutionFailed(err_msg, code, out, err)
resource_management.core.exceptions.ExecutionFailed: Execution of 'ambari-sudo.sh su hdfs -l -s /bin/bash -c 'ulimit -c unlimited ;  /usr/hdp/3.1.4.0-315/hadoop/bin/hdfs --config /usr/hdp/3.1.4.0-315/hadoop/conf --daemon start zkfc'' returned 1.

解决办法：
部署zkfc 节点执行

hdfs --daemon stop zkfc

zkfc已启动但是它好像识别不了不是页面启动的,然后retry

最后等待
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原文链接：https://blog.csdn.net/weixin_41772761/article/details/113348627