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303 lines
6.1 KiB
Bash
Executable File
303 lines
6.1 KiB
Bash
Executable File
#!/usr/bin/env bash
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# $Id: mountvm.sh 9132 2010-06-04 20:17:43Z manuel $ $HeadURL: svn://svn.lab.vmops.com/repos/vmdev/java/scripts/vm/storage/iscsi/mountvm.sh $
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# mountvm.sh -- mount image directory from NFS and ISCSI server
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#
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#
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usage() {
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printf "Usage: %s: [-u | -m ] -h <iscsi-target-host> -r <remote-dir> -t <root disk target-name> -w <swap disk target name> -1 <datadisk target name> -l <local dir> -n <vm-name>\n" $(basename $0) >&2
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}
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# check if server is up and running
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check_iscsi_server() {
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local pings=1
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while ! ping -c 1 -n -q $1 > /dev/null && [ $pings -ne $2 ]
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do
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let pings=pings+1
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done
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printf "##check_iscsi_server: number of pings=$pings\n"
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[ $pings -eq $2 ] && return 1
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return 0;
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}
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do_iscsi_login () {
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local rc=0
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#create a record in the client database
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iscsiadm -m node -T $1 -p $2 -o new
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rc=$?
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if [ $rc -gt 0 ]
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then
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printf "Failed to create ISCSI initiator record for target rc=$rc\n" >&2
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return 6
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fi
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# do not autologin upon restart
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iscsiadm -m node -T $1 -p $2 -o update -n node.startup -v manual
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#login to the target
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iscsiadm -m node -T $1 -p $2 -l
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rc=$?
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if [ $rc -gt 0 ]
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then
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printf "Failed to login to target, rc=$rc\n" >&2
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return 7
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fi
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}
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get_device_links() {
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local n=20
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local dev=
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while [ -z "$dev" -a $n -gt 0 ]
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do
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sleep 3;
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let n=n-1;
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dev=$(ls -l /dev/disk/by-path/ip-$1*$2*| awk '{print $NF}' | awk -F"/" '{print $NF}' | head -1)
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done
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if [ $n -eq 0 ]
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then
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printf "****Timed out waiting for $3 device to register**\n"
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fi
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printf "$dev\n"
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}
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do_iscsi_logout() {
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local rc=0
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if [ "$1" == "" ]
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then
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return $rc
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fi
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iscsiadm -m node -T $1 -u #logout
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rc=$?
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if [ $rc -gt 0 ]
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then
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printf "*****Warning: failed to logout of $1 rc=$rc\n"
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fi
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iscsiadm -m node -T $1 -o delete #delete record from db
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if [ $? -gt 0 ]
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then
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printf "*****Warning: failed to delete iscsi record $1 rc=$rc\n"
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fi
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return $rc
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}
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# unmount a local directory and all data disks within
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unmount_all() {
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local rc=0
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local err=0
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local localdir=$1
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local vmname=$2
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local disks=$(ls -l $DISKDIR | grep $vmname | awk '{print $NF}') #/dev/sdb
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for d in $disks ;
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do
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disknum=$(echo $d | awk -F"/" '{print $NF}') #sdb
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tgt=$(ls -l /dev/disk/by-path | grep -w $disknum | awk '{print $(NF-2)}' | grep -v part | cut -d: -f2- | cut -d- -f3-)
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softlink=$(ls -l $DISKDIR |grep $vmname| grep $d | awk '{print $(NF-2)}') #vmname-root or vmname-swap or vmname-data
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rm $DISKDIR/$softlink #delete soft link
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rc=$?
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if [ $rc -gt 0 ]
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then
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printf "*****Warning: failed to delete $DISKDIR/$softlink rc=$rc\n"
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let err=err+1
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fi
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do_iscsi_logout $tgt
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let err=err+$?
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done
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#unmount the image filesystem from nfs
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umount $localdir >&2 #ignore errors
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rc=$?
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if [ $rc -gt 0 ]
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then
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printf "*****Warning: unmount failed rc=$rc\n"
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let err=err+1
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fi
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rm -fr $localdir
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return $err
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}
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#set -x
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hflag=
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rflag=
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lflag=
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uflag=
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mflag=
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nflag=
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tflag=
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dflag=
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tgtname=
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swpname=
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datatgtname=
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DISKDIR="/dev/disk/by-vm/"
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while getopts 'umxw:t:n:h:r:l:1:' OPTION
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do
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case $OPTION in
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h) hflag=1
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iscsitgthost="$OPTARG"
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;;
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r) rflag=1
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remotedir="$OPTARG"
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;;
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t) tflag=1
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tgtname="$OPTARG"
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;;
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w) wflag=1
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swpname="$OPTARG"
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;;
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l) lflag=1
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localdir="$OPTARG"
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;;
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1) dflag=1
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datatgtname="$OPTARG"
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;;
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n) nflag=1
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vmname="$OPTARG"
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;;
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u) uflag=1
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;;
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m) mflag=1
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;;
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x) set -x
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;;
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?) usage
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exit 2
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;;
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esac
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done
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if [ "$hflag$rflag$lflag$nflag$tflag" != "11111" ] && [ "$uflag$lflag$nflag" != "111" ]
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then
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usage
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exit 2
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fi
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if [ "$uflag$mflag" != "1" ] && [ "$uflag$mflag" != "" ]
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then
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printf "***Specify one of -u (unmount) or -m (mount)\n" >&2
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usage
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exit 2
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fi
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if [ "$uflag" == "1" ]
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then
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unmount_all $localdir $vmname
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rc=$?
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do_iscsi_logout $tgtname #ignore error, tgtname could be null
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do_iscsi_logout $swpname
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do_iscsi_logout $datatgtname
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exit $rc
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fi
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#create the local dir if necessary
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if ! mkdir -p $localdir
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then
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printf "***Unable to create local directory, exiting\n" >&2
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exit 2
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fi
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#create disk directory if needed
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if [ ! -d $DISKDIR ];
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then
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mkdir $DISKDIR
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fi
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#check if the iscsi target portal is up and running
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if ! check_iscsi_server "$iscsitgthost" 4
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then
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printf "***Unable to ping the iscsi target host $iscsitgthost, exiting\n" >&2
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exit 3
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fi
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#mount the local dir (for kernel, ramdisk, etc)
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mount -t nfs $iscsitgthost:$remotedir $localdir -o intr,rsize=32768,wsize=32768,hard
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if [ $? -gt 0 ]
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then
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printf "***Failed to mount $remotedir at $localdir\n" >&2
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exit 5
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fi
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do_iscsi_login $tgtname $iscsitgthost
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if [ $? -gt 0 ]
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then
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printf "***Failed to login to $tgtname at $iscsitgthost\n" >&2
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unmount_all $localdir $vmname
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exit 5
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fi
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sleep 1
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if [ -n "$swpname" ]
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then
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do_iscsi_login $swpname $iscsitgthost
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if [ $? -gt 0 ]
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then
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printf "***Failed to login to $swapname at $iscsitgthost\n" >&2
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unmount_all $localdir $vmname
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exit 6
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fi
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sleep 1
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fi
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if [ -n "$datatgtname" ]
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then
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do_iscsi_login $datatgtname $iscsitgthost
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if [ $? -gt 0 ]
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then
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printf "***Failed to login to $datatgtname at $iscsitgthost\n" >&2
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unmount_all $localdir $vmname
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exit 7
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fi
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sleep 1
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fi
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#figure out the device number and make a softlink
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rootdev=$(get_device_links $iscsitgthost $tgtname root)
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if [ "$rootdev" == "" ]
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then
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printf "***Failed to get device links for $tgtname\n" >&2
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unmount_all $localdir $vmname
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exit 8
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fi
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ln -s /dev/$rootdev $DISKDIR/$vmname-root
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swapdev=
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if [ -n "$swpname" ]
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then
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swapdev=$(get_device_links $iscsitgthost $swpname swap)
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if [ "$swapdev" == "" ]
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then
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printf "***Failed to get device links for $swapname\n" >&2
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unmount_all $localdir $vmname
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exit 9
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fi
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ln -s /dev/$swapdev $DISKDIR/$vmname-swap
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fi
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datadev=
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if [ -n "$datatgtname" ]
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then
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datadev=$(get_device_links $iscsitgthost $datatgtname data)
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if [ "$datadev" == "" ]
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then
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printf "***Failed to get device links for $datatgtname\n" >&2
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unmount_all $localdir $vmname
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exit 10
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fi
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ln -s /dev/$datadev $DISKDIR/$vmname-datadisk-1
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fi
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if [ $? -gt 0 ]
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then
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printf "***Failed to mount $tgtname at $localdir\n" >&2
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exit 5
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fi
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exit 0
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