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'finally got a working raid dialog :D"
This commit is contained in:
Tobias Powalowski
parent
c328f06099
commit
7ca0863631
1 changed files with 84 additions and 24 deletions
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@ -482,13 +482,45 @@ _stoplvm()
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# Creates software raid devices
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_createmd()
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{
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### TODO:
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### - add raid partitions too!
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MDFINISH=""
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DIALOG --msgbox "LINUX SOFTWARE RAID SUMMARY:\n
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-------------------\n\n
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Linear mode:\n
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You have two or more partitions which are not necessarily the same size\n
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(but of course can be), which you want to append to each other.\n
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Spare-disks are not supported here. If a disk dies, the array dies with\n
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it.\n\n
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RAID-0:\n
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You have two or more devices, of approximately the same size, and you want\n
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to combine their storage capacity and also combine their performance by\n
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accessing them in parallel. Like in Linear mode, spare disks are not\n
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supported here either. RAID-0 has no redundancy, so when a disk dies, the\n
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array goes with it.\n\n
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RAID-1:\n
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You have two devices of approximately same size, and you want the two to\n
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be mirrors of each other. Eventually you have more devices, which you\n
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want to keep as stand-by spare-disks, that will automatically become a\n
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part of the mirror if one of the active devices break.\n\n
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RAID-5:\n
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You have three or more devices of roughly the same size, you want to\n
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combine them into a larger device, but still to maintain a degree of\n
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redundancy fordata safety. Eventually you have a number of devices to use\n
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as spare-disks, that will not take part in the array before another device\n
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fails. If you use N devices where the smallest has size S, the size of the\n
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entire array will be (N-1)*S. This \"missing\" space is used for parity\n
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(redundancy) information. Thus, if any disk fails, all data stay intact.\n
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But if two disks fail, all data is lost.\n\n
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RAID-10:\n
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Shorthand for RAID1+0, a mirrored striped array and needs a minimum of\n
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two disks. It provides superior data security and can survive multiple\n
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disk failures. The main disadvantage is cost, because 50% of your\n
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storage is duplication." 0 0
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while [ "$MDFINISH" != "DONE" ]; do
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: >/tmp/.raid
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: >/tmp/.raid-spare
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#
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# Select raid devices
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#
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# enter raid device name
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while [ "${RAIDDEVICE}" = "" ]; do
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DIALOG --inputbox "Enter the node name for the raiddevice, eg:\n/dev/md0\n/dev/md1\n" 8 65 "/dev/md0" 2>$ANSWER || return 1
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RAIDDEVICE=$(cat $ANSWER)
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@ -497,53 +529,81 @@ _createmd()
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RAIDDEVICE=""
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fi
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done
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# select raid mode
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RAIDLEVELS="linear - raid0 - raid1 - raid5 - raid10 -"
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DIALOG --menu "Select the raid level you want to use" 21 50 13 $RAIDLEVELS 2>$ANSWER || return 1
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LEVEL=$(cat $ANSWER)
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# raid5 and raid10 support parity parameter
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PARITY=""
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if [ "$LEVEL" = "raid5" -o "$LEVEL" = "raid10" ]; then
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PARITYLEVELS="left-asymmetric - left-symmetric - right-asymmetric - right-symmetric -"
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DIALOG --menu "Select the parity layout you want to use (default is left-symmetric)" 21 50 13 $PARITYLEVELS 2>$ANSWER || return 1
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PARTIY=$(cat $ANSWER)
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fi
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# show available partitions with sizes
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DIALOG --msgbox "Available partitions:\n\n$(_getavailpartitions)\n" 0 0
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PARTS=$(findpartitions _)
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# select the first device to use, no missing option available!
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DIALOG --menu "Select the partition to use as first device" 21 50 13 $PARTS 2>$ANSWER || return 1
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PART=$(cat $ANSWER)
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echo "$PART" >>/tmp/.raid
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while [ "$PART" != "DONE" ]; do
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PARTS="$(echo $PARTS | sed -e "s#${PART}\ _##g")"
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DIALOG --menu "Select the partition to use as additional device" 21 50 13 $PARTS SPARE - MISSING - DONE _ 2>$ANSWER || return 1
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# clean loop from used partition and options
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PARTS="$(echo $PARTS | sed -e "s#${PART}\ _##g" -e 's#MISSING\ _##g' -e 's#SPARE\ _##g')"
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# raid0 doesn't support missing devices
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! [ "$LEVEL" = "raid0" -o "$LEVEL" = "linear" ] && MDEXTRA="MISSING _"
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# add more devices
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DIALOG --menu "Select the partition to use as additional device" 21 50 13 $PARTS $MDEXTRA DONE _ 2>$ANSWER || return 1
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PART=$(cat $ANSWER)
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SPARE=""
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! [ "$LEVEL" = "raid0" -o "$LEVEL" = "linear" ] && DIALOG --yesno --defaultno "Would you like to use $PART as spare device?" 0 0 && SPARE="1"
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[ "$PART" = "DONE" ] && break
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if [ "$PART" = "MISSING" ]; then
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DIALOG --yesno "Would you like to create a degraded raid on $RAIDDEVICE?" 0 0 && DEGRADED="missing"
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echo "$DEGRADED" >>/tmp/.raid
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else
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if [ "$PART" = "SPARE" ]; then
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if [ "$SPARE" = "1" ]; then
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echo "$PART" >>/tmp/.raid-spare
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else
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echo "$PART" >>/tmp/.raid
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fi
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fi
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done
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if [ "$(cat /tmp/.raid | grep -v missing | wc -l)" -gt 1 ]; then
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DIALOG --menu "Select the raid level you want to use" 21 50 13 raid0 - raid1 - raid5 - 2>$ANSWER || return 1
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LEVEL=$(cat $ANSWER)
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else
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DIALOG --menu "Only raid1 level available, too many missing devices." 21 50 13 raid1 - 2>$ANSWER || return 1
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LEVEL=$(cat $ANSWER)
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fi
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DIALOG --yesno "Would you like to create $RAIDDEVICE like this?\n\nLEVEL:$LEVEL\n\nDEVICES:\n$(for i in $(cat /tmp/.raid); do echo "$i\n";done)" 0 0 && MDFINISH="DONE"
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# final step ask if everything is ok?
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DIALOG --yesno "Would you like to create $RAIDDEVICE like this?\n\nLEVEL:\n$LEVEL\n\nDEVICES:\n$(for i in $(cat /tmp/.raid); do echo "$i\n";done)\nSPARES:\n$(for i in $(cat /tmp/.raid-spare); do echo "$i\n";done)" 0 0 && MDFINISH="DONE"
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done
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# writing correct raid information to partition table
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# writing raid information to partition table
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for i in $(cat /tmp/.raid | grep -v missing); do
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# get device name
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k=$(echo $i | sed -e 's#[0-9]##g')
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# get partition number of device
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l=$(echo $i | sed -e 's#.*[a-z]##g')
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sfdisk --change-id $k $l fd
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DIALOG --infobox "Changing partition $k$l to raid..." 0 0
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sfdisk --change-id $k $l fd >$LOG 2>&1
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if [ $? -gt 0 ]; then
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DIALOG --msgbox "Error changing partition $k$l to raid (see $LOG for details)." 0 0
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return 1
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fi
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done
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# create raid device
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for DEVICES in $(cat /tmp/.raid); do
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DEVICES=$(echo -n "$DEVICES ")
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done
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for SPARES in $(cat /tmp/.raid-spare); do
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SPARES=$(echo -n "$SPARES ")
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done
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DEVICES="$(echo -n $(cat /tmp/.raid))"
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SPARES="$(echo -n $(cat /tmp/.raid-spare))"
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# combine both if spares are available, spares at the end!
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[ -n $SPARES ] && DEVICES="$DEVICES $SPARES"
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# get number of devices
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RAID_DEVICES="$(cat /tmp/.raid | wc -l)"
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SPARE_DEVICES="$(cat /tmp/.raid-spare | wc -l)"
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### TODO parity in raid5 mode
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mdadm --create $RAIDDEVICE --force --run --level=$LEVEL --raid-devices=$RAID_DEVICES --spare-devices=$SPARE_DEVICES $DEVICES
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# generate options for mdadm
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RAIDOPTIONS="--force --run --level=$LEVEL"
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! [ "$RAID_DEVICES" = "0" ] && RAIDOPTIONS="$RAIDOPTIONS --raid-devices=$RAID_DEVICES"
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! [ "$SPARE_DEVICES" = "0" ] && RAIDOPTIONS="$RAIDOPTIONS --spare-devices=$SPARE_DEVICES"
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! [ "$PARITY" = "" ] && RAIDOPTIONS="$RAIDOPTIONS --layout=$PARITY"
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DIALOG --infobox "Creating $RAIDDEVICE..." 0 0
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mdadm --create $RAIDDEVICE $RAIDOPTIONS $DEVICES >$LOG 2>&1
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if [ $? -gt 0 ]; then
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DIALOG --msgbox "Error creating $RAIDDEVICE (see $LOG for details)." 0 0
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return 1
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fi
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}
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# Creates software lvm devices
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