Install ZFS on CentOS use yum

使用打包好的安装, 好处是加了dkms支持. 一些配置也都弄好了.

以centos 6.x为例

需要访问外网.

$ sudo yum localinstall --nogpgcheck http://archive.zfsonlinux.org/epel/zfs-release$(rpm -E %dist).noarch.rpm

$ sudo yum install zfs 

如果你的机子仅仅只能临时出外网的话,  用完建议重命名.

下次要用的时候, 先申请出外网的权限再把它改回去.

[root@db- ~]# cd /etc/yum.repos.d/

[root@db- yum.repos.d]# ll

total 16

-rw-r--r--. 1 root root 2081 Mar 14 14:27 CentOS6-Base-skymobi_San_Dun.repo

-rw-r--r--. 1 root root 1109 Mar 14 14:27 epel6-skymobi_San_Dun.repo

drwxr-xr-x  2 root root 4096 Mar 14 14:30 repos_back

-rw-r--r--  1 root root  771 May 31 05:14 zfs.repo

[root@db- yum.repos.d]# mv zfs.repo zfs.repo.bak

使用yum安装的话, 自动添加init.d服务.

[root@db-172-16-3-150 src]# chkconfig --list|grep zfs

zfs             0:off   1:off   2:on    3:on    4:on    5:on    6:off

[root@db-172-16-3-150 src]# cat /etc/init.d/zfs

#!/bin/bash

#

# zfs           This script will mount/umount the zfs filesystems.

#

# chkconfig:    2345 01 99

# description:  This script will mount/umount the zfs filesystems during

#               system boot/shutdown.  Configuration of which filesystems

#               should be mounted is handled by the zfs 'mountpoint' and

#               'canmount' properties.  See the zfs(8) man page for details.

#               It is also responsible for all userspace zfs services.

#

### BEGIN INIT INFO

# Provides: zfs

# Required-Start:

# Required-Stop:

# Should-Start:

# Should-Stop:

# Default-Start: 2 3 4 5

# Default-Stop: 1

# Short-Description: Mount/umount the zfs filesystems

# Description: ZFS is an advanced filesystem designed to simplify managing

#              and protecting your data.  This service mounts the ZFS

#              filesystems and starts all related zfs services.

### END INIT INFO

export PATH=/usr/local/sbin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin

if [ -z "$init" ]; then

    # Not interactive

    grep -Eqi 'zfs=off|zfs=no' /proc/cmdline && exit 3

fi

# Source function library & LSB routines

. /etc/rc.d/init.d/functions

# script variables

RETVAL=0

ZFS="/sbin/zfs"

ZPOOL="/sbin/zpool"

ZPOOL_CACHE="/etc/zfs/zpool.cache"

servicename=zfs

LOCKFILE=/var/lock/subsys/$servicename

# functions

zfs_installed() {

        modinfo zfs > /dev/null 2>&1 || return 5

        $ZPOOL  > /dev/null 2>&1

        [ $? == 127 ] && return 5

        $ZFS    > /dev/null 2>&1

        [ $? == 127 ] && return 5

        return 0

}

# i need a bash guru to simplify this, since this is copy and paste, but donno how

# to correctly dereference variable names in bash, or how to do this right

# first parameter is a regular expression that filters fstab

read_fstab() {

        unset FSTAB

        n=0

        while read -r fs mntpnt fstype opts blah ; do

                fs=`printf '%b\n' "$fs"`

                FSTAB[$n]=$fs

                let n++

        done < <(egrep "$1" /etc/fstab)

}

start()

{

        # Disable lockfile check

        # if [ -f "$LOCKFILE" ] ; then return 0 ; fi

        # check if ZFS is installed.  If not, comply to FC standards and bail

        zfs_installed || {

                action $"Checking if ZFS is installed: not installed" /bin/false

                return 5

        }

        # Requires selinux policy which has not been written.

        if [ -r "/selinux/enforce" ] &&

           [ "$(cat /selinux/enforce)" = "1" ]; then

                action $"SELinux ZFS policy required: " /bin/false || return 6

        fi

        # Delay until all required block devices are present.

        if [ -x /sbin/udevadm ]; then

                /sbin/udevadm settle

        elif [ -x /sbin/udevsettle ]; then

                /sbin/udevsettle

        fi

        # load kernel module infrastructure

        if ! grep -q zfs /proc/modules ; then

                action $"Loading kernel ZFS infrastructure: " modprobe zfs || return 5

        fi

        sleep 1

        action $"Mounting automounted ZFS filesystems: " $ZFS mount -a || return 152

        action $"Exporting ZFS filesystems: " $ZFS share -a || return 153

        # Read fstab, try to mount zvols ignoring error

        read_fstab "^/dev/(zd|zvol)"

        template=$"Mounting volume %s registered in fstab: "

        for volume in "${FSTAB[@]}" ; do

                string=`printf "$template" "$volume"`

                action "$string" mount "$volume" 2>/dev/null || /bin/true

        done

        # touch "$LOCKFILE"

}

stop()

{

        # Disable lockfile check

        # if [ ! -f "$LOCKFILE" ] ; then return 0 ; fi

        # check if ZFS is installed.  If not, comply to FC standards and bail

        zfs_installed || {

                action $"Checking if ZFS is installed: not installed" /bin/false

                return 5

        }

        # the poweroff of the system takes care of this

        # but it never unmounts the root filesystem itself

        # shit

        action $"Syncing ZFS filesystems: " sync

             # about the only thing we can do, and then we

             # hope that the umount process will succeed

             # unfortunately the umount process does not dismount

             # the root file system, there ought to be some way

             # we can tell zfs to just flush anything in memory

             # when a request to remount,ro comes in

        #echo -n $"Unmounting ZFS filesystems: "

        #$ZFS umount -a

        #RETVAL=$?

        #if [ $RETVAL -ne 0 ]; then

        #       failure

        #       return 8

        #fi

        #success

        rm -f "$LOCKFILE"

}

# See how we are called

case "$1" in

        start)

                start

                RETVAL=$?

                ;;

        stop)

                stop

                RETVAL=$?

                ;;

        status)

                lsmod | grep -q zfs || RETVAL=3

                $ZPOOL status && echo && $ZFS list || {

                        [ -f "$LOCKFILE" ] && RETVAL=2 || RETVAL=4

                }

                ;;

        restart)

                stop

                start

                ;;

        condrestart)

                if [ -f "$LOCKFILE" ] ; then

                        stop

                        start

                fi

                ;;

        *)

                echo $"Usage: $0 {start|stop|status|restart|condrestart}"

                RETVAL=3

                ;;

esac

exit $RETVAL

[参考]

1.  http://zfsonlinux.org/epel.html