gistfile1.txt

##### RAID EXAMPLE

# Check for mounts
disks=($(ls /dev/sd[b-z]))
for dev in "${disks[@]}"
do 
  disk=$(readlink -f $dev)
  grep -q ^$disk /proc/mounts && umount $disk
  grep $dev /etc/fstab && sed -i "\,$dev,d" /etc/fstab
done
# Cheap hack to make sure device not busy
/sbin/udevadm control --stop-exec-queue
# Zero drives come pre-formated ext2
for dev in "${disks[@]}"
do 
  dd if=/dev/zero of=$dev bs=4096 count=1024
done
# RAID
mdadm --create /dev/md0 --level=0 --name=cassrd0 --force --raid-devices=${#disks[@]} ${disks[@]}
blockdev --setra 512 /dev/md0
udevadm control --start-exec-queue
mkfs.ext4 -L cassrd0 /dev/md0
# mount
mkdir -p $cassdir
echo "LABEL=cassrd0 $cassdir ext4 defaults,noatime 0 0" >> /etc/fstab
mount -a 


#### LV EXAMPLE


/sbin/pvcreate /dev/xvdb
/sbin/vgcreate elasticsearch-graylog /dev/xvdb

EXTENTS=`/sbin/vgdisplay | grep "Total PE" | sed -e 's/Total PE//g' | tr -d " \t\n\r"`

/sbin/lvcreate --name esdata -l $EXTENTS elasticsearch-graylog
/sbin/mkfs.ext4 /dev/elasticsearch-graylog/esdata

mkdir -p $DATA
/bin/echo "/dev/elasticsearch-graylog/esdata $DATA ext4 defaults,noatime 0 0" | sudo tee -a /etc/fstab
/bin/mount -a