How does zabbix monitor linux disk performance

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Zabbix is an enterprise-level distributed open source monitoring solution, which can monitor the health and integrity of many network parameters and servers. It uses flexible alarm mechanism and allows users to configure email-based alarms for almost any event. This allows users to respond quickly to server problems.

Premise environment

Perl and python, as well as zabbix-agent are already available.

Indicators that need to be monitored

1: IO per second, i.e. iops or tps2: throughput 3: average IO size, avgrq-sz4:IO wait queue length, avgqu-sz5: percentage of disk activity time, util

Install iostat tools

Yum install sysstat-y # centos7 installs the iostat tool, which comes with centos6 before

Create a directory on the agent side to store the execution script and modify the permissions

Mkdir / usr/lib/zabbix/alertscripts/-pchown zabbix:zabbix / usr/lib/zabbix/-R

Create a disk discovery script in the / usr/lib/zabbix/alertscripts/ directory

Cd / usr/lib/zabbix/alertscripts/vim discoverables disk.plated prints; cd / usr/lib/zabbix/alertscripts/vim discoverables disk.plated prints; returns Proxmox VM namesub get_vmname_by_id {$vmname= `cat / etc/qemu-server/$_ [0] .conf | grep name | cut-d\:-f 2`; $vmname= ~ s / ^\ s hammer; # remove leading spaces $vmname= ~ s /\ s cards; # remove trailing spaces return $vmname} $first = 1 leading print "{\ n"; print "\ t\" data\ ": [\ n\ n" For (`disk; / proc/ diskstats`) {($major,$minor,$disk) = m / ^\ s * ([0-9] +)\ s + ([0-9] +)\ s + (\ S +)\ s.Splash; $dmnamefile = "/ sys/dev/block/$major:$minor/dm/name"; $vmid= ""; $vmname = ""; $dmname = $disk; $diskdev = "/ dev/$disk"; # DM name if (- e $dmnamefile) {$dmname = `cat $dmnamefile`; $dmname = ~ s /\ nhammer / # remove trailing\ n $diskdev = "/ dev/mapper/$dmname"; # VM name and ID if ($dmname = ~ m / ^. *-([0-9] +) -. * $/) {$vmid = $1; # $vmname = get_vmname_by_id ($vmid);} # print ("$major $minor $disk $diskdev $dmname $vmid $vmname\ n"); print "\ t,\ n" if not $first; $first = 0; print "\ t {\ n" Print "\ t\ t\" {# DISK}\ ":\" $disk\ ",\ n"; print "\ t\ t\" {# DMNAME}\ ":\" $dmname\ ",\ n"; print "\ t\ t\" {# VMNAME}\ ":\" $vmname\ ",\ n"; print "\ t\ t\" {# VMID}\ ":\" $vmid\ "\ n"; print "\ t}\ n";} print "\ n\ t]\ n"; print "}\ n"

Create the files needed to define key under the / usr/lib/zabbix/alertscripts/ directory to obtain the io monitoring values

Vim zbxflowers parseurs iostatstatuses values.shedding statuses binds pact bashdevaver cities 1typecompatible values 2 debug modedebug=0if [[- z "$dev"]]; then echo "error: wrong input value (device)" exit 1fiif [[- z "$type"]]; then echo "error: wrong input value (type)" exit 1ficolumns = `iostat-xN | egrep-o "^ Device.*" `columnsarray= ($columns) column_id=1for I in "${columnsarray [@]}" do # echo "column: $I" if [["$I" = "$type"]] Then if [[$debug-eq 1]] Then echo "right column (${I}) found...column_id: $column_id" fi id= "$" column_id_id=$id$column_id iostats= `iostat-xN | egrep-o "^ ${dev} [[: space:]] +. *" | awk "{print ${column_id_id}" `fi column_id=$ [column _ id + 1] doneif [- z "$iostats"] Then echo "error:\" device\ "or\" type\ "not found (${dev}, ${type})" exit 3fiiostatsprincipals = `wc-l "$iostats" `if [$iostats_lines-ne 1]; then echo "error: wrong output value (${iostats_lines})" exit 2fiecho $iostatsif [[$debug-eq 1]] Then echo "-" echo $columns iostats_debug= `iostat-xN | egrep-o "^ ${dev} [[: space:]] +. *" `echo $iostats_debug echo "- -" fiexit 0 "

Give execution permissions to the two files you just created

Chmod + x / usr/lib/zabbix/alertscripts/*

Add the following to the configuration file of zabbix-agent

Vim / etc/zabbix/zabbix_agentd.conf# diskio discoveryUserParameter=discovery.disks.iostats,/usr/lib/zabbix/alertscripts/discover_disk.plUserParameter=custom.vfs.dev.iostats.rrqm [*], / usr/lib/zabbix/alertscripts/zbx_parse_iostat_values.sh $1 "rrqm/s" UserParameter=custom.vfs.dev.iostats.wrqm [*], / usr/lib/zabbix/alertscripts/zbx_parse_iostat_values.sh $1 "wrqm/s" UserParameter=custom.vfs.dev.iostats.rps [*] / usr/lib/zabbix/alertscripts/zbx_parse_iostat_values.sh $1 "rgamma's" UserParameter=custom.vfs.dev.iostats.wps [*], / usr/lib/zabbix/alertscripts/zbx_parse_iostat_values.sh $1 "wgamble s" UserParameter=custom.vfs.dev.iostats.avgrq [*], / usr/lib/zabbix/alertscripts/zbx_parse_iostat_values.sh $1 "avgrq-sz" UserParameter=custom.vfs.dev.iostats.avgqu [*] Usr/lib/zabbix/alertscripts/zbx_parse_iostat_values.sh $1 "avgqu-sz" UserParameter=custom.vfs.dev.iostats.await [*], / usr/lib/zabbix/alertscripts/zbx_parse_iostat_values.sh $1 "await" UserParameter=custom.vfs.dev.iostats.svctm [*], / usr/lib/zabbix/alertscripts/zbx_parse_iostat_values.sh $1 "svctm" UserParameter=custom.vfs.dev.iostats.util [*] / usr/lib/zabbix/alertscripts/zbx_parse_iostat_values.sh $1 "% util" UserParameter=custom.vfs.dev.iostats.rkB [*], / usr/lib/zabbix/alertscripts/zbx_parse_iostat_values.sh $1 "rkB/s" UserParameter=custom.vfs.dev.iostats.wkB [*], / usr/lib/zabbix/alertscripts/zbx_parse_iostat_values.sh $1 "wkB/s"

Restart the zabbix-agent side

Systemctl restart zabbix-agent.service

Download and import the zabbix template file for linux disk

Wget https://qiniu.wsfnk.com/Template_Linux_Disk_IO_Stats.xml

Import the template Template_Linux_Disk_IO_Stats.xml as required in the figure

Create a regular expression to discover the disk, which the template needs to use

# the name here must be it. It is recommended to copy and paste "Linux disks for autodiscovery".

Link the host to the template

View Drawin

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