与标题同等报错：ZBX_NOTSUPPORTED: Cannot obtain filesystem information: [13] Permission denied
解决办法：
chmod 755 /
usermod -a -G docker zabbix
#usermod -a -G group1 user1 添加用户user1到组group1里
server端测试：zabbix_get -s 39.97.1.194 -p 10050 -k "vfs.fs.size[/home/unicom/unicom,pfree]"
