ambari 安裝HDP3.0.1後，啓動服務的問題記錄

HDP的ambari集成安裝工具真的是比ClouderaManager差上那麼一點兒，不說安裝的時候就麻煩，即便軟件安裝包已成功安裝，也不意味着能夠正常使用了，啓動HDP集羣過程當中還會有很多的錯誤！

1、啓動服務時，出現若干循環符號連接錯誤，好比下面是啓動ranger時發生的其中一個錯誤信息：

    setup_tagsync(upgrade_type=upgrade_type)
  File "/var/lib/ambari-agent/cache/stacks/HDP/3.0/services/RANGER/package/scripts/setup_ranger_xml.py", line 515, in setup_tagsync
    create_parents = True
  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 177, in action_create
 raise Fail("Applying %s failed, looped symbolic links found while resolving %s" % (self.resource, path))
resource_management.core.exceptions.Fail: Applying Directory['/usr/hdp/current/ranger-tagsync/conf'] failed, looped symbolic links found while resolving /usr/hdp/current/ranger-tagsync/conf

解決辦法，刪掉錯誤的符號連接，創建正確的連接：

cd /usr/hdp/current/ranger-tagsync
unlink conf
ln -s /etc/ranger-tagsync/3.0.0.0-1634/0 conf

2、權限錯誤: Permission denied，詳見下面log信息

stderr:   /var/lib/ambari-agent/data/errors-919.txt

Traceback (most recent call last):
  File "/var/lib/ambari-agent/cache/stacks/HDP/3.0/services/RANGER/package/scripts/ranger_admin.py", line 236, in <module>
    RangerAdmin().execute()
  File "/usr/lib/ambari-agent/lib/resource_management/libraries/script/script.py", line 351, in execute
    method(env)
  File "/usr/lib/ambari-agent/lib/resource_management/libraries/script/script.py", line 968, in restart
    self.stop(env, upgrade_type=upgrade_type)
  File "/var/lib/ambari-agent/cache/stacks/HDP/3.0/services/RANGER/package/scripts/ranger_admin.py", line 61, in stop
    Execute(format('{params.ranger_stop}'), environment={'JAVA_HOME': params.java_home}, user=params.unix_user)
  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 '/usr/hdp/current/ranger-admin/ews/ranger-admin-services.sh stop' returned 126. -bash: /usr/hdp/current/ranger-admin/ews/ranger-admin-services.sh: Permission denied

解決辦法，添加執行權限：

chmod a+x ranger-admin-services.sh