1、Exhausted available authentication methods

ubuntu未啟用root使用者，或者啟用root使用者後未允許可遠端登入root 使用者

Let's consolidate everything in one post:

Default, Root user is locked in ubuntu/Linux.To unlock, first need to reset password. It asks for Password twice.

$ sudo passwd root
 Enter UNIX password:
 Retype UNIX password:
 

Unlock root user

$ sudo passwd -u root

Open /etc/ssh/sshd_config in an editor:

sudo nano /etc/ssh/sshd_config

In the file now look for PermitRootLogin without-password and replace it with this

PermitRootLogin yes

Restart SSH service

sudo service ssh restart

2、安裝失敗。 無法接收 Agent 發出的檢測訊號

/var/log/cloudera-scm-agent/

[22/Apr/2018 22:23:00 +0000] 17968 MainThread agent        ERROR    Failed to connect to previous supervisor.
Traceback (most recent call last):
  File "/usr/lib/cmf/agent/build/env/lib/python2.7/site-packages/cmf-5.14.2-py2.7.egg/cmf/agent.py", line 2136, in find_or_start_supervisor
    self.configure_supervisor_clients()
  File "/usr/lib/cmf/agent/build/env/lib/python2.7/site-packages/cmf-5.14.2-py2.7.egg/cmf/agent.py", line 2317, in configure_supervisor_clients
    supervisor_options.realize(args=["-c", os.path.join(self.supervisor_dir, "supervisord.conf")])
  File "/usr/lib/cmf/agent/build/env/lib/python2.7/site-packages/supervisor-3.0-py2.7.egg/supervisor/options.py", line 1599, in realize
    Options.realize(self, *arg, **kw)
  File "/usr/lib/cmf/agent/build/env/lib/python2.7/site-packages/supervisor-3.0-py2.7.egg/supervisor/options.py", line 333, in realize
    self.process_config()
 File "/usr/lib/cmf/agent/build/env/lib/python2.7/site-packages/supervisor-3.0-py2.7.egg/supervisor/options.py", line 341, in process_config
    self.process_config_file(do_usage)
  File "/usr/lib/cmf/agent/build/env/lib/python2.7/site-packages/supervisor-3.0-py2.7.egg/supervisor/options.py", line 376, in process_config_file
    self.usage(str(msg))
  File "/usr/lib/cmf/agent/build/env/lib/python2.7/site-packages/supervisor-3.0-py2.7.egg/supervisor/options.py", line 164, in usage
    self.exit(2)
SystemExit: 2


 

可能原因：

 Ensure that the host's hostname is configured properly.

 /etc/hosts下的ip配置必須採用FQDN

如果是centOS系統，檢視 /etc/hosts 和 /etc/sysconfig/network 下的配置是否一致

如果是ubuntu系統，檢視 /etc/hosts 和 /etc/hostname 下的配置是否一致

修改hostname後，重新修改root使用者的免密碼登入自身ssh localhost（需要？如果需要cdh還要知道登入root使用者的密碼幹嘛？）

cdh大概是因為在操作中使用ssh登入root使用者時查詢當前主機的主機名，發現它是lizhifeng-Lenovo-g400，

登入後的roo使用者模式為[email protected]，與以下設定的主機名稱相悖。

為什麼要求FQDN?因為FQDN就是把主機名配到域名中，作為域名的一部分。這樣就不會出現主機名配置不正確的問題

3、在安裝過程中，一直停在activating狀態

log日誌如下：

Monitor-HostMonitor throttling_logger ERROR    Failed to collect NTP metrics
Traceback (most recent call last):

安裝cdh前先安裝ntp

OSError: [Errno 2] No such file or directory
[23/Apr/2018 19:26:25 +0000] 2373 Monitor-HostMonitor throttling_logger ERROR    Timed out waiting for worker process collecting filesystem usage to complete. This may occur if the host has an NFS or other remote filesystem that is not responding to requests in a timely fashion. Current nodev filesystems: /run,/dev/shm,/run/lock,/sys/fs/cgroup,/run/user/108,/run/user/0,/run/user/1000,/run/cloudera-scm-agent/process
[23/Apr/2018 19:28:55 +0000] 2373 MainThread agent        INFO     Stopping agent...

[23/Apr/2018 20:43:37 +0000] 5921 Thread-13 https        ERROR    Failed to retrieve/stroe URL: http://master.cdh.com:7180/cmf/parcel/download/CDH-5.14.2-1.cdh5.14.2.p0.3-xenial.parcel.torrent -> /opt/cloudera/parcel-cache/CDH-5.14.2-1.cdh5.14.2.p0.3-xenial.parcel.torrent <urlopen error timed out>