zabbix如何监控linux磁盘性能IO

青旅半醒 2022-12-24 09:56 448阅读 0赞

# 前提环境： #

perl和python，以及zabbix-agent已是可用状态  
需要主要监控的指标：

1：每秒IO数，即iops或tps
        2：吞吐率
        3：平均IO尺寸，avgrq-sz
        4：IO等待队列长度,avgqu-sz
        5：磁盘活动时间百分比,util

第一：安装iostat工具

yum install sysstat -y    #centos7安装iostat工具,centos6之前自带

第二：在agent端创建用于存放执行脚本的目录，并修改权限

mkdir /usr/lib/zabbix/alertscripts/ -p
        chown zabbix:zabbix /usr/lib/zabbix/ -R

第三：在/usr/lib/zabbix/alertscripts/目录下创建磁盘发现脚本

cd /usr/lib/zabbix/alertscripts/
        vim discover_disk.pl
    
    #!/usr/bin/perl
    # give disk dmname, returns Proxmox VM name
    sub get_vmname_by_id
      { 
      $vmname=`cat /etc/qemu-server/$_[0].conf | grep name | cut -d \: -f 2`;
      $vmname =~ s/^\s+//; #remove leading spaces
      $vmname =~ s/\s+$//; #remove trailing spaces
      return $vmname
      }
    $first = 1;
    print "{\n";
    print "\t\"data\":[\n\n";
    
    for (`cat /proc/diskstats`)
      { 
      ($major,$minor,$disk) = m/^\s*([0-9]+)\s+([0-9]+)\s+(\S+)\s.*$/;
      $dmnamefile = "/sys/dev/block/$major:$minor/dm/name";
      $vmid= "";
      $vmname = "";
      $dmname = $disk;
      $diskdev = "/dev/$disk";
      # DM name
      if (-e $dmnamefile) { 
        $dmname = `cat $dmnamefile`;
        $dmname =~ s/\n$//; #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";

第四：在/usr/lib/zabbix/alertscripts/目录下创建定义key需要的文件，用于获取io监控值

vim zbx_parse_iostat_values.sh
    
    #!/bin/bash
    dev=$1
    type=$2
    
    #enable debug mode
    debug=0
    
    if [[ -z "$dev" ]]; then
      echo "error: wrong input value (device)"
      exit 1
    fi
    
    if [[ -z "$type" ]]; then
      echo "error: wrong input value (type)"
      exit 1
    fi
    
    columns=`iostat -xN |egrep -o "^Device.*"`
    
    columnsarray=($columns)
    
    column_id=1
    
    for 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]
    done
    
    if [ -z "$iostats" ]; then
        echo "error: \"device\" or \"type\" not found (${dev},${type})"
        exit 3
    fi
    
    iostats_lines=`wc -l <<< "$iostats"`
    
    if [ $iostats_lines -ne 1 ]; then
        echo "error: wrong output value (${iostats_lines})"
        exit 2
    fi
    
    echo $iostats
    
    if [[ $debug -eq 1 ]]; then
        echo "- - - - - - - - - -"
        echo $columns
        iostats_debug=`iostat -xN |egrep -o "^${dev}[[:space:]]+.*"`
        echo $iostats_debug
        echo "- - - - - - - - - -"
    fi
    
    exit 0

第五：为刚才创建的两个文件赋予执行权限

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

第六：在zabbix-agent的配置文件上添加如下内容

vim /etc/zabbix/zabbix_agentd.conf
    
    # diskio discovery
    UserParameter=discovery.disks.iostats,/usr/lib/zabbix/alertscripts/discover_disk.pl
    UserParameter=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 "r/s"
    UserParameter=custom.vfs.dev.iostats.wps[*],/usr/lib/zabbix/alertscripts/zbx_parse_iostat_values.sh $1 "w/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"

第七：重启zabbix-agent端

systemctl restart zabbix-agent.service

# 下面是在zabbix的web界面下操作 #

将zabbix关于linux磁盘的模板文件下载下来并导入

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

第一：按如图要求导入模板Template\_Linux\_Disk\_IO\_Stats.xml  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwOTA3OTc3_size_16_color_FFFFFF_t_70_pic_center]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwOTA3OTc3_size_16_color_FFFFFF_t_70_pic_center 1]  
第二：创建发现磁盘的正则表达式，模板需要使用它  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwOTA3OTc3_size_16_color_FFFFFF_t_70_pic_center 2]  
\#这里的名称一定要是它，建议复制粘贴 “Linux disks for autodiscovery”  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwOTA3OTc3_size_16_color_FFFFFF_t_70_pic_center 3]  
第三：将主机链接到该模板上  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwOTA3OTc3_size_16_color_FFFFFF_t_70_pic_center 4]  
第四：查看图形  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwOTA3OTc3_size_16_color_FFFFFF_t_70_pic_center 5]

参考链接 ：

zabbix如何监控linux磁盘性能IO  
https://www.wsfnk.com/archives/249.html

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