創建 multipath.conf 別名的腳本

我找到了一個為 Nimble 卷創建多路徑別名的腳本，我修改它以在 freenas 中工作，它的內容是

#/bin/bash
# This script will scan the system for attached Nimble Volumes
# and output a list of multipath alias statements for the linux
# /etc/multipath.conf.  This will allow for the volume to be 
# referenced by the volume name in place of the normal mpathX
# 
# To use the script, just run it.  If Nimble volumes are present
# it will output the confiugration data to standard out
# Just copy and paste that output in to /etc/multipath.conf
# Take care when adding these lines to make sure another alias
# is not present or if there are other multipath statements

# Start by checking to see if we have any Nimble volumes connected
ls -l /dev/disk/by-path | grep freenas > /dev/null

if [ $? -eq 0 ] 
then

#Build list of Nimble devices
DEV_LIST=$(ls -l /dev/disk/by-path | grep freenas | awk '{print $NF'} | sed 's/..\/..\///')

# Output the first line of the config
echo "multipaths {"

# For each device found we determine the name and the mpathid
for i in $DEV_LIST
   do

   SUBSTRING=$(ls -l /dev/disk/by-path | grep $i  | awk -F: '{print $4}') 

   # This uses pattern matching to find the name of the volume
   OFFSET=$(echo $SUBSTRING | awk --re-interval 'match($0, /\-[v][a-z0-9]{16}/) { print RSTART-1 }')
   NIMBLEVOL=${SUBSTRING::$OFFSET}

   # Here we collect the MPATHID
   MPATHID=$(multipath -ll /dev/$i | grep FreeBSD | awk '{print $2}' | sed -e 's\(\\g' | sed -e 's\)\\g')

   # Enable for debug
   #echo "Volume name for $device is $nimblevol with multipath ID is $mpathid"

   # Putting it all together with proper formatting using printf
   MULTIPATH=$(printf "multipath {\n \t\twwid \t\t%s \n \t\talias\t\t %s\n \t}" $MPATHID $NIMBLEVOL)
   MATCH='multipaths {'

   echo "$MULTIPATH"

   done

   # End the configuration section
   echo "}"
else 

   # If no Nimble devices found, exit with message
   echo "No Nimble Devices Found, have you met leeloo?"
   exit 1
fi

exit 0

當我執行它時

multipaths {
multipath {
               wwid            36589cfc000000e9f2e24f431339ec7b0
               alias
       }
multipath {
               wwid            36589cfc00000026c07d6caed9e43aa22
               alias
       }
multipath {
               wwid            36589cfc000000f051b0d5718e0b46b2f
               alias
       }
multipath {
               wwid            36589cfc000000af38b5be525e3cf1cb4
               alias
       }
multipath {
               wwid            36589cfc000000824684e211c61d58fc5
               alias
       }
multipath {
               wwid            36589cfc000000f0f579280a94ef72125
               alias
       }
multipath {
               wwid            36589cfc000000e9f2e24f431339ec7b0
               alias
       }
multipath {
               wwid            36589cfc00000026c07d6caed9e43aa22
               alias
       }
multipath {
               wwid            36589cfc000000f051b0d5718e0b46b2f
               alias
       }
multipath {
               wwid            36589cfc000000af38b5be525e3cf1cb4
               alias
       }
multipath {
               wwid            36589cfc000000824684e211c61d58fc5
               alias
       }
multipath {
               wwid            36589cfc000000f0f579280a94ef72125
               alias
       }
}

沒有任何別名你有什麼建議嗎？

OFFSET=註釋以and開頭的行NIMBLEVOL=並插入

NIMBLEVOL=$(echo $SUBSTRING | sed -e 's/^\(.*\)-lun.*/\1/')

在註釋行的正下方。

...
#OFFSET=$(echo $SUBSTRING | awk --re-interval 'match($0, /\-[v][a-z0-9]{16}/) { print RSTART-1 }')
#NIMBLEVOL=${SUBSTRING::$OFFSET}
NIMBLEVOL=$(echo $SUBSTRING | sed -e 's/^\(.*\)-lun.*/\1/')
...

不確定這是否真的會創建一個有效的配置，假設您想要 data1、data2 等作為別名。

引用自：https://unix.stackexchange.com/questions/266160