System Storage Manager (SSM) provides a command line interface to manage storage in various technologies. We will show a kind of use case that how to manage a brand new disk and mount it on the certain point.
We consider such a situation that we already have had a machine running with Linux OS, and now we finding out the space of /opt is almost running out in some reasons. We decide add a new disk for this node ( if you are using virtual machine you just add a new disk without any other operations, but you have to take consideration of raid in physical machine case ) endeavor to migrate data to this new space and keep the mount point ( /opt ) stays the same for long.
Here we give a comparatively complete steps in this script demo though the command is pretty simple. You still have to notice that there are several special conditions are limited in our case: 1) Available yum source; 2) The device name of disk new added is /dev/sdb and the mount point is /opt; 3) The logic volume name is lv_opt, the volume group name is datavg, those are specified in command ssm create -n lv_opt --fstype xfs -p datavg /dev/sdb /opt
#!/bin/sh
#if [ $# -ne 1 ];then
# action "USAGE: $0 disk-use"
# exit 1
#fi
. /etc/init.d/functions
current_user=`whoami`
if [[ "$current_user" == "root" ]];then
action "ensure user is root" /bin/true
else
action "run script must is root" /bin/false
exit 1
fi
rpm -qa |grep "system-storage-manager"
if [ $? -eq 0 ];then
action "system-storage-manager have been install " /bin/true
else
yum list |grep system-storage-manager > /dev/null
if [ $? -ne 0 ];then
action "yum list haven't system-storage-manager" /bin/false
exit 1
fi
echo "start install system-storage-manager..."
yum -y install system-storage-manager > /dev/null
rpm -qa |grep "system-storage-manager" > /dev/null
if [ $? -ne 0 ];then
action "system-storage-manager install fail " /bin/false
exit 1
fi
action "system-storage-manager install Success" /bin/true
fi
opt_line=`ls -l /opt | wc -l`
echo "/opt file lines is $opt_line"
mkdir -p /tmp/opt
mv /opt/* /tmp/opt
tmp_line=`ls -l /tmp/opt | wc -l`
echo "/tmp/opt file lines is $tmp_line"
if [[ "$opt_line" == "$tmp_line" ]];then
action "/opt filelist mv Success " /bin/true
else
action "/opt filelist mv fail " /bin/false
exit 1
fi
fdisk -l |grep /dev/sdb > /dev/null
if [ $? -ne 0 ];then
action "fdisk /dev/sdb not exist " /bin/false
exit 1
fi
action "fdisk /dev/sdb ready OK " /bin/true
#ssm create -s 100%FREE -n lv_opt --fstype xfs -p datavg /dev/sdb /opt > /dev/null
ssm create -n lv_opt --fstype xfs -p datavg /dev/sdb /opt > /dev/null
pvs |grep /dev/sdb
if [ $? -ne 0 ];then
action "PV create fail " /bin/false
exit 1
fi
action "PV create Success " /bin/true
vgs |grep datavg
if [ $? -ne 0 ];then
action "VG create fail " /bin/false
exit 1
fi
action "VG create Success " /bin/true
lvs |grep lv_opt
if [ $? -ne 0 ];then
action "LV create fail " /bin/false
exit 1
fi
action "LV create Success " /bin/true
df -Th |grep "opt" > /dev/null
if [ $? -ne 0 ];then
action "fdisk /dev/sdb not exist " /bin/false
exit 1
fi
action "/opt mount Success " /bin/true
echo "/dev/mapper/datavg-lv_opt /opt xfs defaults 0 0" >> /etc/fstab
action "write mount INFO to /etc/fstab " /bin/true
tail -1 /etc/fstab
echo "start auto mount check"
umount /opt
echo "start umount /opt "
df -Th |grep "opt" > /dev/null
if [ $? -eq 0 ];then
action "/opt umount fail " /bin/false
exit 1
fi
action "/opt umount Success " /bin/true
echo "Start Auto mount "
mount -a
df -Th |grep "opt" > /dev/null
if [ $? -ne 0 ];then
action "fdisk /dev/sdb auot mount fail " /bin/false
exit 1
fi
action "/opt mount Success " /bin/true
echo "/tmp/opt/ file now move /opt "
mv /tmp/opt/* /opt/.
new_opt_line=`ls -l /opt/. |wc -l`
if [[ "$new_opt_line" == "$opt_line" ]];then
action "/tmp/opt filelist mv Success " /bin/true
echo "current line is : $new_opt_line"
else
action "/tmp/opt filelist mv fail " /bin/false
exit 1
fi
ls -l /opt
echo "all of operation End "
Use df -h check the result.