构建ranger-usersync报错"KeyError: 'ranger.usersync.ldap.ldapbindpassword'"

ranger-usersync使用ldap时候必须配置配置密码,如下ldap访问无需密码采用的匿名访问方式（使用LDAP admin软件访问时候如果填写密码会报错）。

# ldap bind password for the bind dn specified above
# please ensure read access to this file  is limited to root, to protect the password
# Must specify a value if SYNC_SOURCE is ldap
# unless anonymous search is allowed by the directory on users and group
SYNC_LDAP_BIND_PASSWORD =

报错如下：

[ranger@ranger ranger-2.6.0-usersync]$ ./setup.sh
INFO: moving [/opt/ranger-2.6.0-usersync/usersync/conf/java_home.sh] to [/opt/ranger-2.6.0-usersync/usersync/conf/.java_home.sh.21012026164731] .......
Direct Key not found:ranger_base_dir
Direct Key not found:rangerUsersync_password
Direct Key not found:hadoop_conf
Direct Key not found:USERSYNC_PID_DIR_PATH
Direct Key not found:SYNC_GROUP_USER_MAP_SYNC_ENABLED
Traceback (most recent call last):
  File "./setup.py", line 625, in <module>
    main()
  File "./setup.py", line 436, in main
    modifiedInstallProps = convertInstallPropsToXML(installProps)
  File "./setup.py", line 269, in convertInstallPropsToXML
    ldapPass = ret[SYNC_LDAP_BIND_PASSWORD_KEY]
KeyError: 'ranger.usersync.ldap.ldapbindpassword'

可以修改setup.py略过校验
找到此行，注释即可# password_validation(ldapPass, SYNC_LDAP_BIND_PASSWORD_KEY)

其实，这个校验也比较简单，就是不能为空if password：

def password_validation(password, userType):
    if password:
        if re.search("[\\\`'\"]", password):
            print("[E] " + userType + " property contains one of the unsupported special characters like \" ' \ `")
            sys.exit(1)
        else:
            print("[I] " + userType + " property is verified.")
    else:
        print("[E] Blank password is not allowed for property " + userType + ",please enter valid password.")
        sys.exit(1)