Send statistic from /proc/diskstats to Zabbix without any additional package and program

This is small project for my Home server

• AutoDiscovery BlockDev and Filter by global regexp: block_dev_filter
• Collect Read\Write Operations per second
• Collect Read\Write Sectors per second
• Calculate Time for 1 Read\Write Operations
  • Trigger when IO_Time >30ms at last 5min
• Collect IO Queue
• Convert DM(Device Mapper) device to pretty Name
  • Get stat for dm-1 but print for user vg00-lv_root
  • After reboot dm-1 may change to dm-2, but stat will be correct

1. Add parametrs to zabbix-agent.conf

#### enable Include in config
# /etc/zabbix/zabbix_agentd.conf
echo "Include=/etc/zabbix-agent.d/*.conf" >> /etc/zabbix/zabbix_agentd.conf

#### copy config 
mkdir -p /etc/zabbix-agent.d/ && cd /etc/zabbix-agent.d/

# For RHEL/CentOS-8, Debian-10(buster), Ubuntu-18.04(Xenial), Gentoo
curl -O 'https://raw.githubusercontent.com/dusharu/ZBX_Disk_Stat/master/config_zabbix-agent/Disk_Stat.conf'
# For old system
curl -o Disk_Stat.conf 'https://raw.githubusercontent.com/dusharu/ZBX_Disk_Stat/master/config_zabbix-agent/Disk_Stat_awk.conf'


#### restart zabbix-agent
# RHEL/CentOS
systemctl restart zabbix-agentd
# Debian/Ubuntu
systemctl restart zabbix-agent
# Gentoo
/etc/init.d/zabbix-agentd restart

2. Import Template_ZBX/ZBX_Disk_Stat.xml
3. Create global regexp: block_dev_filter
   • ^$ - result FALSE - device was remove
   • .snapshot. - result FALSE - filter LVM snapshot
   • -real$ - result FALSE - filter LVM snapshot
   • -cow$ - result FALSE - filter LVM snapshot
   • ^xvd[a-z]*[0-9]+$ - result FALSE - filter partitions
   • ^[hs]d[a-z]*[0-9]+$ - result FALSE - filter partitions
   • ^loop[0-9]*$ - result FALSE - filter loop device
   • ^sr[0-9]*$ - result FALSE - filter CD-ROM
4. Add host to group "Disk_Stat: io_block_dev"
5. Wait before Zabbix Discovery and Get Some Data

Graph create by Grafana and Zabbix plugin

Graph create by Zabbix

• config_zabbix-agent - config for zabbix Agent
  • Disk_Stat.conf - default config
  • Disk_Stat_awk.conf - for backward compatibility with old Distros(with linux-utils version < 2.30)
• Template_ZBX - Zabbix Template
• Develop - information for Developers
• README.md - information for Users
• Screenshoots - Screensoot for README.md
• LICENSE - license file

zabbix_get -s <IP|Server_Name> -k custom.blkdev.discovery |jq .

zabbix_get -s <IP|Server_Name> -k custom.blkdev.all_stat[vg00-lv_root] | jq .

1. kernel.org: Describe /proc/diskstats
2. kernel.org: I/O statistics fields
3. Wikipedia.org: maximum IOPS on different Disk
4. RAID calcuator

1. Add link with information about maximum IO_time