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LVM2：從路徑取得lv和vg名稱（磁碟區組名稱和邏輯磁碟區名稱）

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LVM2：從路徑取得lv和vg名稱（磁碟區組名稱和邏輯磁碟區名稱）

假設我們有 lv 路徑：

lvpath=/dev/mapper/vg2-Music

比我lvdisplay -c用剪切分割：

vgname="$(lvdisplay -c "$lvpath" | cut -d ':' -f 2 )"
lvname="$(basename "$(lvdisplay -c "$lvpath" | cut -d ':' -f 1 )" )"

結果：

$ echo VG: $vgname LV: $lvname
VG: vg2 LV: Music

問題：

有更方便的方法嗎？

我可以相信lvdisplay -c 它總是會提供形式上的路徑/dev/VGname/LVname嗎？ （如果是/dev/mapper/VGname-LVname基本名稱，應與 sed 交換）

LVM2 軟體包中是否有工具可以從路徑取得 LVname？

答案1

lvs與選項一起使用-o來自訂顯示的欄位。

set $(lvs --noheadings -o lv_name,vg_name)
lv_name=$1 vg_name=$2

請注意，您不能直接寫入，lv_name=$(lvs --noheadings -o lv_name)因為lvs在值周圍放置了額外的空格。該程式碼片段是安全的，因為磁碟區名稱不允許包含 shell 特殊字元。

答案2

這些非常適合在 bash 腳本中使用 LVM。

VG名稱：
這對於獲取 VG 名稱（卷組名稱）作為沒有空格的單一值非常有效：

sudo vgs --noheadings -o vg_name | tr -d '  '


LV 名：
對於 LV 名稱（邏輯磁碟區名稱），「通常」不只一個，您通常需要使用語法來引用它/dev/<vg_name>/<lv_name>。不知道你想要什麼輸出格式。以下將為您提供 LV 名稱的列表，其中每個值均以換行符號「\n」分隔：

sudo lvscan | cut -d "'" -f 2

或者，如果您只想要 LV 名稱<lv_name>：

sudo lvs --noheadings -o lv_name | tr -d '  '


PV 名稱：
你沒有問，但當我這樣做時，這就是你獲取 PV 名稱（物理卷名稱）的方式：

sudo pvs --noheadings -o pv_name | tr -d '  '

答案3

其他答案都是正確的。如果你需要LV怎麼辦小路來自LV名字本身？我們假設 LV 名稱是唯一的，即任何其他 VG 中都不存在具有該名稱的其他 LV。比如“音樂”。您只需一步即可獲得路徑：

lvs --noheadings -o lv_path -S lv_name=Musik

您的輸出將會是可在後續 LV 指令中使用的令牌（LV 路徑）。

如果lv_name不是唯一的，那麼如果不額外小心，這將無法工作。

答案4

也許有點晚了，但我讓你看我製作的一個腳本：

#!/bin/bash
IFS=$'\n'
export IFS

phydis=$(pvdisplay | egrep "PV Name|VG Name|PV Size" | awk 'NR%3{printf "%s,",$0;next}{print;}' | sed 's/PV Name//g' | sed 's/VG Name//g' | sed 's/PV Size//g' | sed 's/ //g')
if [ -f /etc/redhat-release ];then
    if [[ `cat /etc/redhat-release | awk -F " " '{print$4}' | awk -F "." '{print$1}'` -eq 7 ]];then
        logdis=$(lvdisplay | egrep "LV Path|LV Size" | awk 'NR%2{printf "%s,",$0;next}{print;}' | sed 's/LV Path//g' | sed 's/LV Size//g' | sed 's/ //g' | sort)
    else
        logdis=$(lvdisplay | egrep "LV Name|LV Size" | awk 'NR%2{printf "%s,",$0;next}{print;}' | sed 's/LV Name//g' | sed 's/LV Size//g' | sed 's/ //g' | sort)
    fi
else
        logdis=$(lvdisplay | egrep "LV Name|LV Size" | awk 'NR%2{printf "%s,",$0;next}{print;}' | sed 's/LV Name//g' | sed 's/LV Size//g' | sed 's/ //g' | sort)
        flag="norh"
fi
phyparttrans=""

echo "|--------------------------|----------------------|----------------------|----------------------|--------------------------------|----------------------|-----------------|-----------------|--------------------------------|"
echo "| PV Name                  | PV Size              | VG Name              | VG Size              | LV Name                        | LV Size              | Used            | Avail           | Mounted on                     |"
        for phy in ${phydis};do
                phypart1=$(echo "${phy}" | awk -F "," '{print$1}')
                phypart2=$(echo "${phy}" | awk -F "," '{print$2}')
                phypart3=$(echo "${phy}" | awk -F "," '{print$3}' | cut -f1 -d"/")
                if [ "$phypart2" != "$phyparttrans" ];then
                phyparttrans="$phypart2"
                counter=1
                    for log in ${logdis};do
                        volsize=$(vgdisplay | egrep "VG Name|VG Size" | awk 'NR%2{printf "%s,",$0;next}{print;}' | sed 's/VG Name//g' | sed 's/VG Size//g' | sed 's/ //g' | grep "$phypart2" | awk -F "," '{print$2}')
                        logpart1=$(echo "${log}" | awk -F "," '{print$1}')
                        logpart2=$(echo "${log}" | awk -F "," '{print$2}')
                        logpartmatch=$(echo "${logpart1}" | awk -F "/" '{print$3}')
                        if [ $counter -eq 1 ];then
                                if [ "${phypart2}" == "${logpartmatch}" ];then
                                        mountpoint1=$(echo "$logpart1" | awk -F "/" '{print$3}')
                                        mountpoint2=$(echo "$logpart1" | awk -F "/" '{print$4}')
                                        df_output=$(df -h /dev/mapper/${mountpoint1}-${mountpoint2} | tail -1)
                                        Used=$(echo "$df_output" | awk -F " " '{print$2}')
                                        Avail=$(echo "$df_output" | awk -F " " '{print$3}')
                                        Mounted=$(echo "$df_output" | awk -F " " '{print$NF}')
                                        echo "|--------------------------|----------------------|----------------------|----------------------|--------------------------------|----------------------|-----------------|-----------------|--------------------------------|"
                                        printf '%1s %-24s %1s %-20s %1s %-20s %1s %-20s %1s %-30s %1s %-20s %1s %-15s %1s %-15s %1s %-30s %1s\n' "|" "$phypart1" "|" "$phypart3" "|" "$phypart2" "|" "$volsize" "|" "$logpart1" "|" "$logpart2" "|" "$Used" "|" "$Avail" "|" "$Mounted" "|"
                                        counter=$[$counter +1]
                                elif [[ "${flag}" == "norh" ]];then
                                        df_output=$(df -h /dev/${phypart2}/${logpart1} | tail -1)
                                        Used=$(echo "$df_output" | awk -F " " '{print$2}')
                                        Avail=$(echo "$df_output" | awk -F " " '{print$3}')
                                        Mounted=$(echo "$df_output" | awk -F " " '{print$NF}')
                                        echo "|--------------------------|----------------------|----------------------|----------------------|--------------------------------|----------------------|-----------------|-----------------|--------------------------------|"
                                        printf '%1s %-24s %1s %-20s %1s %-20s %1s %-20s %1s %-30s %1s %-20s %1s %-15s %1s %-15s %1s %-30s %1s\n' "|" "$phypart1" "|" "$phypart3" "|" "$phypart2" "|" "$volsize" "|" "$logpart1" "|" "$logpart2" "|" "$Used" "|" "$Avail" "|" "$Mounted" "|"
                                        counter=$[$counter +1]
                                fi
                        else
                                if [ "${phypart2}" == "${logpartmatch}" ];then
                                        mountpoint1=$(echo "$logpart1" | awk -F "/" '{print$3}')
                                        mountpoint2=$(echo "$logpart1" | awk -F "/" '{print$4}')
                                        df_output=$(df -h /dev/mapper/${mountpoint1}-${mountpoint2} | tail -1)
                                        Used=$(echo "$df_output" | awk -F " " '{print$2}')
                                        Avail=$(echo "$df_output" | awk -F " " '{print$3}')
                                        Mounted=$(echo "$df_output" | awk -F " " '{print$NF}')
                                        printf '%1s %-24s %1s %-20s %1s %-20s %1s %-20s %1s %-30s %1s %-20s %1s %-15s %1s %-15s %1s %-30s %1s\n' "|" " " "|" " " "|" " " "|" " " "|" "$logpart1" "|" "$logpart2" "|" "$Used" "|" "$Avail" "|" "$Mounted" "|"
                                        counter=$[$counter +1]
                                elif [[ "${flag}" == "norh" ]];then
                                        df_output=$(df -h /dev/${phypart2}/${logpart1} | tail -1)
                                        Used=$(echo "$df_output" | awk -F " " '{print$2}')
                                        Avail=$(echo "$df_output" | awk -F " " '{print$3}')
                                        Mounted=$(echo "$df_output" | awk -F " " '{print$NF}')
                                        printf '%1s %-24s %1s %-20s %1s %-20s %1s %-20s %1s %-30s %1s %-20s %1s %-15s %1s %-15s %1s %-30s %1s\n' "|" " " "|" " " "|" " " "|" " " "|" "$logpart1" "|" "$logpart2" "|" "$Used" "|" "$Avail" "|" "$Mounted" "|"
                                        counter=$[$counter +1]

                                fi
                        fi
                    done
                else
                        printf '%1s %-24s %1s %-20s %1s %-20s %1s %-20s %1s %-30s %1s %-20s %1s %-15s %1s %-15s %1s %-30s %1s\n' "|" "$phypart1" "|" "$phypart3" "|" " " "|" " " "|" " " "|" " " "|" " " "|" " " "|" " " "|"
                fi
        done
echo "|--------------------------|----------------------|----------------------|----------------------|--------------------------------|----------------------|-----------------|-----------------|--------------------------------|"

更新

Here is the script exit example:

[root@server01 /root/scripts]# ./lvm_display.sh
|--------------------------|----------------------|----------------------|----------------------|--------------------------------|----------------------|-----------------|-----------------|--------------------------------|
| PV Name                  | PV Size              | VG Name              | VG Size              | LV Name                        | LV Size              | Used            | Avail           | Mounted on                     |
|--------------------------|----------------------|----------------------|----------------------|--------------------------------|----------------------|-----------------|-----------------|--------------------------------|
| /dev/cciss/c0d2          | 1.64TB               | VolGroup01           | 1.64TB               | /dev/VolGroup01/backup_files   | 50.00GB              | 132M            | 50G             | /data/backup_files             |
|                          |                      |                      |                      | /dev/VolGroup01/data           | 1000.00GB            | 591G            | 410G            | /data                          |
|                          |                      |                      |                      | /dev/VolGroup01/ftp            | 100.00GB             | 74G             | 27G             | /data/ftp                      |
|                          |                      |                      |                      | /dev/VolGroup01/dir1           | 50.00GB              | 15G             | 36G             | /prod/app/dir1                 |
|                          |                      |                      |                      | /dev/VolGroup01/nfs_test       | 12.00GB              | 127G            | 224K            | /dev                           |
|                          |                      |                      |                      | /dev/VolGroup01/testing        | 200.00GB             | 39G             | 162G            | /data/testing                  |
|                          |                      |                      |                      | /dev/VolGroup01/shared         | 125.00GB             | 15G             | 111G            | /data/shared                   |
|--------------------------|----------------------|----------------------|----------------------|--------------------------------|----------------------|-----------------|-----------------|--------------------------------|
| /dev/cciss/c0d0p2        | 558.78GB             | VolGroup00           | 558.75GB             | /dev/VolGroup00/LogVol00       | 10.00GB              | 7.0G            | 2.3G            | /                              |
|                          |                      |                      |                      | /dev/VolGroup00/LogVol01       | 32.00GB              | 127G            | 224K            | /dev                           |
|                          |                      |                      |                      | /dev/VolGroup00/LogVol02       | 120.00GB             | 57G             | 54G             | /prod                          |
|                          |                      |                      |                      | /dev/VolGroup00/LogVol03       | 10.00GB              | 160M            | 9.1G            | /tmp                           |
|                          |                      |                      |                      | /dev/VolGroup00/LogVol05       | 336.75GB             | 205G            | 133G            | /data                          |
|--------------------------|----------------------|----------------------|----------------------|--------------------------------|----------------------|-----------------|-----------------|--------------------------------|

歡迎任何改進！

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