"Host 'xxxx is not allowed to connect to this MySQL server" 通过 Ambari 安装 Ranger 数据库时
"Host 'xxxx is not allowed to connect to this MySQL server" when installing Ranger DBs via Ambari
尝试在 3 个 centos7 节点上安装 HDP 集群（用于测试/评估目的），当我被要求为 Ranger 和 Ranger KMS 配置数据库时遇到错误。
当 运行Ambari 对自动数据库和数据库用户设置进行连接测试时，看到错误表明节点无法连接。
2019-07-18 16:22:02,448 - Check db_connection_check was unsuccessful. Exit code: 1. Message: ERROR: Unable to connect to the DB. Please check DB connection properties. java.sql.SQLException: null, message from server: "Host 'HW02.co.local' is not allowed to connect to this MySQL server"
Traceback (most recent call last): File "/var/lib/ambari-agent/cache/custom_actions/scripts/check_host.py", line 546, in <module> CheckHost().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/custom_actions/scripts/check_host.py", line 207, in actionexecute raise Fail(error_message) resource_management.core.exceptions.Fail: Check db_connection_check was unsuccessful. Exit code: 1. Message: ERROR: Unable to connect to the DB. Please check DB connection properties. java.sql.SQLException: null, message from server: "Host 'HW02.co.local' is not allowed to connect to this MySQL server"
我在数据节点上有一个新安装的 MySQL 服务器，可以 运行
mysql -u root -p -h localhost`
但出现
的错误
mysql -u root -p -h <some remote cluster node>`
投掷
ERROR 2003 (HY000): Can't connect to MySQL server on '' (111)
mysql 配置文件看起来绑定到所有接口...
[root@HW03 ~]# cat /etc/my.cnf
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html
[mysqld]
#
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
#
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
#
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
bind-address=0.0.0.0
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# Recommended in standard MySQL setup
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
所以不确定是什么问题。
在 MySQL 或 DBA 方面不是很有经验。对此有任何调试建议或修复吗？
根据 Hortonworks community forums 的回答，Ambari 连接测试最终得以通过：
在 mysql 服务器上，运行...
[root@HW03 ~]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 51
Server version: 5.6.44 MySQL Community Server (GPL)
Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> use mysql;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
mysql> use mysql;
Database changed
mysql>
mysql> CREATE USER 'root'@'%' IDENTIFIED BY '<root's password, THIS IS NOT LITERAL>';
Query OK, 0 rows affected (0.00 sec)
mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' WITH GRANT OPTION;
Query OK, 0 rows affected (0.00 sec)
mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)
mysql> exit
Bye
现在可以看到...
虽然，仍然没有解决无法从其他远程主机访问 mysql 的问题，即。仍然出现错误
mysql -u root -p -h <some remote cluster node>`
ERROR 2003 (HY000): Can't connect to MySQL server on '' (111)
尝试在 3 个 centos7 节点上安装 HDP 集群（用于测试/评估目的），当我被要求为 Ranger 和 Ranger KMS 配置数据库时遇到错误。
当 运行Ambari 对自动数据库和数据库用户设置进行连接测试时，看到错误表明节点无法连接。
2019-07-18 16:22:02,448 - Check db_connection_check was unsuccessful. Exit code: 1. Message: ERROR: Unable to connect to the DB. Please check DB connection properties. java.sql.SQLException: null, message from server: "Host 'HW02.co.local' is not allowed to connect to this MySQL server"
Traceback (most recent call last): File "/var/lib/ambari-agent/cache/custom_actions/scripts/check_host.py", line 546, in <module> CheckHost().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/custom_actions/scripts/check_host.py", line 207, in actionexecute raise Fail(error_message) resource_management.core.exceptions.Fail: Check db_connection_check was unsuccessful. Exit code: 1. Message: ERROR: Unable to connect to the DB. Please check DB connection properties. java.sql.SQLException: null, message from server: "Host 'HW02.co.local' is not allowed to connect to this MySQL server"
我在数据节点上有一个新安装的 MySQL 服务器，可以 运行
mysql -u root -p -h localhost`
但出现
的错误mysql -u root -p -h <some remote cluster node>`
投掷
ERROR 2003 (HY000): Can't connect to MySQL server on '' (111)
mysql 配置文件看起来绑定到所有接口...
[root@HW03 ~]# cat /etc/my.cnf
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html
[mysqld]
#
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
#
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
#
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
bind-address=0.0.0.0
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# Recommended in standard MySQL setup
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
所以不确定是什么问题。
在 MySQL 或 DBA 方面不是很有经验。对此有任何调试建议或修复吗？
根据 Hortonworks community forums 的回答，Ambari 连接测试最终得以通过：
在 mysql 服务器上，运行...
[root@HW03 ~]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 51
Server version: 5.6.44 MySQL Community Server (GPL)
Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> use mysql;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
mysql> use mysql;
Database changed
mysql>
mysql> CREATE USER 'root'@'%' IDENTIFIED BY '<root's password, THIS IS NOT LITERAL>';
Query OK, 0 rows affected (0.00 sec)
mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' WITH GRANT OPTION;
Query OK, 0 rows affected (0.00 sec)
mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)
mysql> exit
Bye
现在可以看到...
虽然，仍然没有解决无法从其他远程主机访问 mysql 的问题，即。仍然出现错误
mysql -u root -p -h <some remote cluster node>`
ERROR 2003 (HY000): Can't connect to MySQL server on '' (111)