CentOS5/6/7系统下搭建安装Amabari大数据集群时出现SSLError: Failed to connect. Please check openssl library versions.错误的解决办法（图文详解）

　　不多说，直接上干货！

==========================
Creating target directory...
==========================

Command start time -- ::

Connection to cetc12 closed.
SSH command execution finished
host=cetc12, exitcode=
Command end time -- ::

==========================
Copying ambari sudo script...
==========================

Command start time -- ::

scp /var/lib/ambari-server/ambari-sudo.sh
host=cetc12, exitcode=
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Copying common functions script...
==========================

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scp /usr/lib/ambari-server/lib/ambari_commons
host=cetc12, exitcode=
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==========================
Copying create-python-wrap script...
==========================

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scp /var/lib/ambari-server/create-python-wrap.sh
host=cetc12, exitcode=
Command end time -- ::

==========================
Copying OS type check script...
==========================

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scp /usr/lib/ambari-server/lib/ambari_server/os_check_type.py
host=cetc12, exitcode=
Command end time -- ::

==========================
Running create-python-wrap script...
==========================

Command start time -- ::

Connection to cetc12 closed.
SSH command execution finished
host=cetc12, exitcode=
Command end time -- ::

==========================
Running OS type check...
==========================

Command start time -- ::
Cluster primary/cluster OS family is redhat7 and local/current OS family is redhat7

Connection to cetc12 closed.
SSH command execution finished
host=cetc12, exitcode=
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==========================
Checking 'sudo' package on remote host...
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Connection to cetc12 closed.
SSH command execution finished
host=cetc12, exitcode=
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==========================
Copying repo file to 'tmp' folder...
==========================

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scp /etc/yum.repos.d/ambari.repo
host=cetc12, exitcode=
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==========================
Moving file to repo dir...
==========================

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Connection to cetc12 closed.
SSH command execution finished
host=cetc12, exitcode=
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==========================
Changing permissions for ambari.repo...
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Command start time -- ::

Connection to cetc12 closed.
SSH command execution finished
host=cetc12, exitcode=
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==========================
Copying setup script file...
==========================

Command start time -- ::

scp /usr/lib/ambari-server/lib/ambari_server/setupAgent.py
host=cetc12, exitcode=
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==========================
Running setup agent script...
==========================

Command start time -- ::
("INFO 2018-07-26 13:17:06,791 HeartbeatHandlers.py:116 - Stop event received
INFO -- ::, NetUtil.py: - Stop event received
INFO -- ::, ExitHelper.py: - Performing cleanup before exiting...
INFO -- ::, ExitHelper.py: - Cleanup finished, exiting with code:
INFO -- ::, main.py: - Agent died gracefully, exiting.
INFO -- ::, ExitHelper.py: - Performing cleanup before exiting...
INFO -- ::, main.py: - loglevel=logging.INFO
INFO -- ::, main.py: - loglevel=logging.INFO
INFO -- ::, main.py: - loglevel=logging.INFO
INFO -- ::, DataCleaner.py: - Data cleanup thread started
INFO -- ::, DataCleaner.py: - Data cleanup started
INFO -- ::, DataCleaner.py: - Data cleanup finished
INFO -- ::, hostname.py: - agent:hostname_script configuration not defined thus read hostname 'cetc12' using socket.getfqdn().
INFO -- ::, PingPortListener.py: - Ping port listener started on port:
INFO -- ::, main.py: - Connecting to Ambari server at https://cetc13:8440 (172.10.10.173)
INFO -- ::, NetUtil.py: - Connecting to https://cetc13:8440/ca
ERROR -- ::, NetUtil.py: - EOF occurred in violation of protocol (_ssl.c:)
ERROR -- ::, NetUtil.py: - SSLError: Failed to connect. Please check openssl library versions.
Refer to: https://bugzilla.redhat.com/show_bug.cgi?id=1022468 for more details.
WARNING -- ::, NetUtil.py: - Server at https://cetc13:8440 is not reachable, sleeping for 10 seconds...
", None)
("INFO 2018-07-26 13:17:06,791 HeartbeatHandlers.py:116 - Stop event received
INFO -- ::, NetUtil.py: - Stop event received
INFO -- ::, ExitHelper.py: - Performing cleanup before exiting...
INFO -- ::, ExitHelper.py: - Cleanup finished, exiting with code:
INFO -- ::, main.py: - Agent died gracefully, exiting.
INFO -- ::, ExitHelper.py: - Performing cleanup before exiting...
INFO -- ::, main.py: - loglevel=logging.INFO
INFO -- ::, main.py: - loglevel=logging.INFO
INFO -- ::, main.py: - loglevel=logging.INFO
INFO -- ::, DataCleaner.py: - Data cleanup thread started
INFO -- ::, DataCleaner.py: - Data cleanup started
INFO -- ::, DataCleaner.py: - Data cleanup finished
INFO -- ::, hostname.py: - agent:hostname_script configuration not defined thus read hostname 'cetc12' using socket.getfqdn().
INFO -- ::, PingPortListener.py: - Ping port listener started on port:
INFO -- ::, main.py: - Connecting to Ambari server at https://cetc13:8440 (172.10.10.173)
INFO -- ::, NetUtil.py: - Connecting to https://cetc13:8440/ca
ERROR -- ::, NetUtil.py: - EOF occurred in violation of protocol (_ssl.c:)
ERROR -- ::, NetUtil.py: - SSLError: Failed to connect. Please check openssl library versions.
Refer to: https://bugzilla.redhat.com/show_bug.cgi?id=1022468 for more details.
WARNING -- ::, NetUtil.py: - Server at https://cetc13:8440 is not reachable, sleeping for 10 seconds...
", None)

Connection to cetc12 closed.
SSH command execution finished
host=cetc12, exitcode=
Command end time -- ::

Registering with the server...
Registration with the server failed.

[root@cetc15 lib64]# rpm -qa | grep openssl
openssl-libs-1.0.2k-.el7.x86_64
xmlsec1-openssl-1.2.-.el7_4.x86_64
openssl-1.0.2k-.el7.x86_64

　　解决办法1：

地址：http://stackoverflow.com/questions/38423925/ambari-confirm-hosts-step-fails-registration-with-the-server-failed

说明：中文和英文操作系统版本问题，中文操作系统出错，英文则成功；

Hey,thank both of you.i got it.The character in China is UTF8,and Ambari is ascii.And Python 2.6 for UTF8 has a bug.

和

I think this is because I set a non-English language (i.e,. Trad. Chinese) as a default language when I installed CentOs 7. It would encounter a charset problem (UTF-8<->ascii) when confirming hosts. After changing the default language to English, This problem has been solved.

解决方法是将系统的默认语言改成英语。

　　解决办法2：

最有效的方式就是关闭 openssl 的检查

sed -i 's/verify=platform_default/verify=disable/' /etc/python/cert-verification.cfg

source /etc/python/cert-verification.cfg

 　　解决办法3：

若还是不能注册ambari-agent,使用下面介绍的方式。

　　如果上面方式还不能注册，说明jdk版本不通过，使用默认oracle啊jdk，博主是（centos7.3，所以选择jdk1.8）

（1）先停掉：ambari-server stop；

（2）卸载掉所有节点agent:rpm -qa | grep ambari-agent 得到对应版本，使用rpm -e ambari-agent-XXX卸载；

（3）启动setup：ambari-server setup，配置你的东西，直到选择jdk如下图：

　　　　这里，选择3

　　　　然后，yum -y install ambari-agent

等下载安装完成，继续后续步骤。直到结束

（4）启动ambari：ambari-server start

（5）配置ambari即可正常注册ambari-agent

　　　　解决办法4：

　　　　最终解决办法：

　　见

https://community.hortonworks.com/questions/121978/openssl-compatibility.html?childToView=138080#answer-138080

　　改为

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