云服务器磁盘挂载与扩容
磁盘挂载
上传脚本至服务器，命令行运行
bash -x init.disk.sh执行脚本，等待脚本运行结束。1
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### 自动挂载磁盘
### 适用于阿里云服务器自动挂载磁盘
### 功能
# 适用于阿里云服务器第一次
# 将挂载的磁盘，每块依次挂载到/data/ /data1/ /data2目录
# 无需传参，自动使用磁盘所有存储空间
#信号非0退出脚本
#set -e
#去掉rc.local
grep init_disk.sh /etc/rc.local >/dev/null && sed -i 's/^bash \/usr\/local\/scripts\/init_disk.sh/# &/g' /etc/rc.local
#清理脚本
trap "rm -rf ${BASH_SOURCE}" EXIT
# ctrl+c
trap "" SIGINT SIGQUIT
### 先检查磁盘信息
__check() {
#获取磁盘信息
_dev=`fdisk -l 2> /dev/null |grep /dev/...1 |head -n 1 |cut -c 1-7`
_disk_all=(
`fdisk -l 2>/dev/null |grep -v "doesn't contain" |grep -o "${_dev}." |uniq -c |grep -oP "(?<=1 )${_dev}."`
)
#检查磁盘（没有可操作的磁盘则退出脚本）
echo ${_disk_all[@]} |grep -E "/dev/[a-z]{3}" || { echo "No new disks were found" && exit 1; }
}
### 前期准备
__ready() {
# 根据主机名修改hosts
_hostname=`hostname`
grep ${_hostname} /etc/hosts || sed -i "s/.*127.0.0.1.*/127.0.0.1 ${_hostname} localhost/g" /etc/hosts
# 判断系统
which apt-get && system=ubuntu
which yum && system=centos
# 安装软件包
case ${system} in
ubuntu)
apt-get update
apt-get -y install lvm2 || echo "lvm2 Already installed"
;;
centos)
yum -y install lvm2 || echo "lvm2 Already installed"
;;
*)
echo "Unidentified _system environment variable"
esac
}
#执行主程序
__main() {
#磁盘分区
fdisk ${_disk} <<-EOF
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EOF
#创建lvm
sync ;sleep 2
pvcreate ${_disk}1
vgcreate welab_vg${_num} ${_disk}1
lvcreate -l 100%VG -n welab_vol${_num} welab_vg${_num}
mkfs -t ext4 /dev/welab_vg${_num}/welab_vol${_num}
[ -d /data${_num} ] || mkdir -p /data${_num}
# parted /dev/vdc
# mklabel gpt
# mkpart primary 1024K 3220G
# Ignore
# toggle 1 lvm
# q
# pvcreate /dev/vdc1
# vgcreate welab_vg1 /dev/vdc1
# lvcreate -L 2998G -n welab_vol1 welab_vg1
# mkfs -t ext4 /dev/welab_vg1/welab_vol1
# mkdir /data1
# echo "UUID=`blkid /dev/welab_vg1/welab_vol1 |awk -F'"' '{print $2}'` /data1 ext4 defaults 0 0" >> /etc/fstab
# mount -a
# pvcreate /dev/vd[cdef]1
# vgcreate -A y -s 128M welab_vg1 /dev/vd[cdef]1
# lvcreate -A y -i 4 -I 8 -l 100%VG -n welab_vol1 welab_vg1
# mkfs.ext4 /dev/welab_vg1/welab_vol1 -m 0 -O extent,uninit_bg -E lazy_itable_init=1,stride=2,stripe_width=32 -b 4096 -T largefile -L welab_vol1
# echo "UUID=`blkid /dev/welab_vg1/welab_vol1 |awk -F'"' '{print $2}'` /data1 ext4 defaults,noatime,nodiratime,nodelalloc,barrier=0,data=writeback 0 0" >> /etc/fstab
#去掉遗留的data挂载
#sed -ri '/\/data[0-9]?/d' /etc/fstab
#挂载磁盘
[ -b /dev/welab_vg${_num}/welab_vol${_num} ] && \
echo "UUID=`blkid /dev/welab_vg${_num}/welab_vol${_num} |awk -F'"' '{print $2}'` /data${_num} ext4 defaults 0 0" >> /etc/fstab
sleep 3
mount -a
}
__do_main() {
_data_name=`df -h |grep -oP "data(\d*)?"`
_data_num=`echo ${_data_name} |sed 's/data//g'`
[ x${_data_num} == x'' ] && _num=-1 || _num=$[ ${_data_num}+1 ]
[ x${_data_name} == x'data' ] && _num=0
for _disk in ${_disk_all[@]} ; do
_size=$[ `fdisk -l 2>/dev/null |grep ${_disk} |awk '{print $5}'`/1024/1024/1024-1 ]
if [ ${_size} -gt 20 ] ;then
_num=$[${_num}+1]
[ ${_num} -eq 0 ] && unset _num
__main
else
echo "Disk ${_disk} capacity is less than 20G"
fi
done
}
__check
__ready
__do_main
磁盘扩容
格式化分区
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9fdisk /dev/vdc <<-EOF
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EOF先卸载需要扩容的磁盘
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umount /data
增加磁盘，创建pv
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pvcreate /dev/vdc1
扩容vg
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vgextend welab_vg /dev/vdc1
扩容lv
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lvextend -l 100%VG /dev/welab_vg/welab_vol
检查文件系统
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e2fsck -f /dev/welab_vg/welab_vol
扩容文件系统
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resize2fs /dev/welab_vg/welab_vol
添加fatab，重新挂载
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mount -a
建议卸载磁盘，不能卸载的情况下可以最后执行
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mount -o remount,rw /data