1，My.cnf中使用者名稱密碼無效

在azure雲上面，使用Zabbix監控mysql中，發現在/usr/local/mysql/my.cnf裡面設定的預設使用者名稱密碼無效，出不來資料，而且在zabbix伺服器上，使用zabbix_get也報錯failed，如下

[[email protected]_serv_121_12 ~]#/usr/local/zabbix/bin/zabbix_get -s 192.168.13.13 -p10050 -kmysql.status[Uptime]

/usr/local/mysql/bin/mysqladmin: connect toserver at 'localhost' failed

error: 'Access denied for user'adminuser'@'localhost' (using password: NO)'

[[email protected]_serv_121_12 ~]#

2，嘗試[client]無效

在/usr/local/mysql/my.cnf裡面新增所有客戶端都可以使用的[client]選項卡配額好mysql的使用者名稱密碼

[[email protected]_test_dbm2_3_13 mysql]# vim.my.cnf

[client]

MYSQL_USER=zabbix

password=ys_test0418

再去zabbix伺服器上，使用get來測試下，

[[email protected]_serv_121_12 ~]#

[[email protected]_serv_121_12 ~]#/usr/local/zabbix/bin/zabbix_get -s 192.168.13.13 -p10050 -kmysql.status[Uptime]

/usr/local/mysql/bin/mysqladmin: connect toserver at 'l27.0.0.1' failed

error: 'Unknown MySQL server host 'l27.0.0.1'(0)'

Check that mysqld is running on l27.0.0.1and that the port is 3317.

You can check this by doing 'telnetl27.0.0.1 3317'

[[email protected]_serv_121_12 ~]#

3，繼續嘗試mysqladmin本地除錯一下

Zabbix監控mysql是通過遠端呼叫mysql伺服器的本地的mysqladmin元件來獲取mysql資料庫資訊的，這樣只要在本地mysql伺服器除錯通過了，那麼就應ok了。先在本地免密碼登入除錯通過吧。

嘗試本地mysqladmin，無效：

[[email protected]_test_dbm2_3_13 zabbix]#/usr/local/mysql/bin/mysqladmin -hl27.0.0.1 -uzabbix -pys_test0418 -P3317 -S/usr/local/mysql/mysql.sock extended-status grep -w Com_update

Warning: Using a password on the commandline interface can be insecure.

Got error: Unknown MySQL server host'l27.0.0.1' (0)

嘗試本地mysql，無效：

[[email protected]_test_dbm2_3_13 zabbix]#/usr/local/mysql/bin/mysql -hl27.0.0.1 -uzabbix -pys_test0418 -P3317

Warning: Using a password on the commandline interface can be insecure.

ERROR 2005 (HY000): Unknown MySQL serverhost 'l27.0.0.1' (0)

[[email protected]_test_dbm2_3_13 zabbix]# mysql-hl27.0.0.1 -uzabbix -pys_test0418 -P3317

Warning: Using a password on the commandline interface can be insecure.

ERROR 2005 (HY000): Unknown MySQL server host'l27.0.0.1' (0)

[[email protected]_test_dbm2_3_13 zabbix]#mysql  -uzabbix -pys_test0418 -P3317

Warning: Using a password on the commandline interface can be insecure.

ERROR 1045 (28000): Access denied for user'zabbix'@'localhost' (using password: YES)

[[email protected]_test_dbm2_3_13 zabbix]#

問題在哪裡呢？

4，找到mysql元件識別的my.cnf所在的路徑

看來預設的/usr/local/mysql/my.cnf裡面的配置對於登入來說無效了，那麼我們需要去看下mysqladmin識別哪些my.cnf以及他們的路徑地址：

[[email protected]_test_dbm2_3_13 mysql]#mysqladmin --help  

……

Default options are read from the followingfiles in the given order:

/etc/my.cnf /etc/mysql/my.cnf/usr/local/mysql/etc/my.cnf ~/.my.cnf

……

[[email protected]_test_dbm2_3_13 mysql]#

再ll下看是否能找到這些配置檔案：

[[email protected]_test_dbm2_3_13 mysql]# ll/etc/my.cnf

ls: cannot access /etc/my.cnf: No such fileor directory

[[email protected]_test_dbm2_3_13 mysql]# ll/etc/mysql/my.cnf

ls: cannot access /etc/mysql/my.cnf: Nosuch file or directory

[[email protected]_test_dbm2_3_13 mysql]# ll/usr/local/mysql/etc/my.cnf

ls: cannot access/usr/local/mysql/etc/my.cnf: No such file or directory

[[email protected]_test_dbm2_3_13 mysql]# ll~/.my.cnf

ls: cannot access /root/.my.cnf: No suchfile or directory

[[email protected]_test_dbm2_3_13 mysql]# ll/usr/local/mysql/etc

ls: cannot access /usr/local/mysql/etc: Nosuch file or directory

[[email protected]_test_dbm2_3_13 mysql]#

一個也沒用找到，原來我的mysql是原始碼編譯的，編譯路徑是在/usr/local/mysql/my.cnf，但是mysqladmin不識別了。所以需要安裝提示準備一個新的my.cnf吧

5，準備新的my.cnf，OK

在mysqladmin識別的my.cnf路徑中（/etc/my.cnf /etc/mysql/my.cnf /usr/local/mysql/etc/my.cnf ~/.my.cnf ）選擇一個/usr/local/mysql/etc/my.cnf，然後新建並且在裡面錄製好使用者名稱密碼，然後除錯通過

然後去zabbix伺服器上驗證，可以獲取到mysql伺服器的資料資訊：

Bty：感謝網友木木指點