在一台测试服务器测试Python脚本时，执行Python脚本时报如下错误：
主要错误信息为“operation the sql fail!1045 (28000): Access denied for user 'root'@'127.0.0.1' (using password: YES)”。 部分测试脚本如下所示，如下所，mysql.connector.connect的host为127.0.0.1 其它账号信息做了脱敏处理.
def record_server_info():
try:
server_ip = get_host_ip();
server_name= str.strip(get_host_name());
server_system=platform.system();
linux_dis =platform.linux_distribution();
os_version =''
os_version = ' '.join(linux_dis)
os_bitinfo = platform.architecture()
os_bit =os_bitinfo[0][0:2]
processor = str.strip(commands.getoutput("cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c"))
cpu_slot= commands.getoutput("cat /proc/cpuinfo | grep 'model name' | sort | uniq | wc -l");
cpu_core = multiprocessing.cpu_count();
processor_core =int(cpu_core)/int(cpu_slot);
memory = get_physical_memory()
disk_space = get_disk_info()["capacity"]/1024/1024;
dbcon = mysql.connector.connect(
host='127.0.0.1',
user='root',
passwd='123456',
database='mysql'
)
cursor = dbcon.cursor()
sql_tex =( "insert into db_server_info("
"factory_cd ,"
"server_name ,"
"server_ip ,"
"server_type ,"
"server_system ,"
"is_production ,"
"os_version ,"
"os_patch ,"
"os_bit ,"
"processors ,"
"cpu_slot ,"
"processors_core ,"
"memory ,"
"disk_space ,"
"server_purpose) "
"values(%(factory_cd)s,%(server_name)s,%(server_ip)s,%(server_type)s,%(server_system)s,%(is_production)s,%(os_version)s,%(os_patch)s,%(os_bit)s,%(processors)s,%(cpu_slot)s,%(processors_core)s,%(memory)s,%(disk_space)s,%(server_purpose)s)")
data={'factory_cd':factory_cd, 'server_name':server_name, 'server_ip':server_ip,"server_type":server_type,"server_system":server_system,"is_production":is_productin,"os_version":os_version, "os_patch":'',"os_bit":int(os_bit), "processors":processor,"cpu_slot":cpu_slot, "processors_core":processor_core,"memory":memory,"disk_space":disk_space,"server_purpose":''}
cursor.execute('truncate table db_server_info')
dbcon.commit()
cursor.execute(sql_tex, data)
dbcon.commit()
except mysql.connector.Error as e:
print('operation the sql fail!{0}'.format(e))
finally:
cursor.close;
dbcon.close;
mysql -u root -p 测试登录MySQ发现没有问题，但是一检查发现，如果不指定host的情况下，当前用户为root@localhost，而root@'127.0.0.1'的密码为空。
mysql> select current_user();
+----------------+
| current_user() |
+----------------+
| root@localhost |
+----------------+
1 row in set (0.00 sec)
mysql> show grants for root@'localhost';
+---------------------------------------------------------------------------------------------------------------------------+
| Grants for root@localhost |
+---------------------------------------------------------------------------------------------------------------------------+
| GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' IDENTIFIED BY PASSWORD '*9B67EF98D94F2B81011D6D2CEDE4' WITH GRANT OPTION|
| GRANT PROXY ON ''@'' TO 'root'@'localhost' WITH GRANT OPTION |
+---------------------------------------------------------------------------------------------------------------------------+
2 rows in set (0.00 sec)
mysql> show grants for root@'127.0.0.1';
+---------------------------------------------------------------------+
| Grants for root@127.0.0.1 |
+---------------------------------------------------------------------+
| GRANT ALL PRIVILEGES ON *.* TO 'root'@'127.0.0.1' WITH GRANT OPTION |
+---------------------------------------------------------------------+
1 row in set (0.00 sec)
mysql>
立即检查my.cnf的配置，发现可能某次测试时，设置了参数 skip-name-resolve， 后面忘记取消了。由于启动mysqld时使用了'--skip-name-resolve'参数，此种情况下由于不做域名解析，127.0.0.1和localhost对mysql数据库来讲，是不同的主机，而root@'127.0.0.1'为空密码，所以Python脚本执行时，访问MySQL报错“(28000): Access denied for user 'root'@'127.0.0.1' (using password: YES)”
