我在CentOS 7上安装了munin-node。用于监视系统资源的默认插件工作正常。我按照在线步骤启用了mysql_插件。但是，我遇到了以下错误：

> sudo munin-run --debug mysql_
# Skipping systemd properties simulation due to lack of permissions.
# Processing plugin configuration from /etc/munin/plugin-conf.d/00-default
# Processing plugin configuration from /etc/munin/plugin-conf.d/munin-node
# Processing plugin configuration from /etc/munin/plugin-conf.d/mysql
# Setting /rgid/ruid/ to /4257/498/
# Setting /egid/euid/ to /4257 4257/498/
# Setting up environment
# Environment mysqlpassword = password
# Environment mysqlconnection = DBI:mysql:information_schema;mysql_read_default_file=/etc/my.cnf
# Environment mysqluser = munin
# Environment mysqladmin = /usr/bin/mysqladmin
# About to run '/etc/munin/plugins/mysql_'
Unknown graph  at /etc/munin/plugins/mysql_ line 1805.

这似乎是插件代码本身的问题。有没有其他人遇到过类似的问题和/或有修复？

设置步骤

1. $ sudo yum install munin-node
2. $ sudo ln -s /usr/share/munin/plugins/mysql_ /etc/munin/plugins/mysql_
   1.使用以下命令创建/etc/munin.plugin-conf.d/mysql：

[mysql*]
env.mysqlconnection DBI:mysql:information_schema;mysql_read_default_file=/etc/my.cnf
env.mysqluser munin
env.mysqlpassword munin

1.在MySQL中创建munin用户：

CREATE USER 'munin'@'localhost' IDENTIFIED BY 'munin';
GRANT PROCESS, SUPER ON *.* TO 'munin'@'localhost';
GRANT SELECT ON mysql.* TO 'munin'@'localhost';
FLUSH PRIVILEGES;

1. $ sudo systemctl restart munin-node