模拟linux 双网卡双ip,实现multipath多路径连接存储

                   模拟linux 双网卡双ip,实现multipath多路径连接存储

系统(Centos6.5:oracle-1)

           eth0:192.168.21.23/24

            eth1:172.16.112.17/24 

存储Ip:  192.168.21.230

首先要配置iscsi存储,再其次一下操作,我这里配置了两个ISCIS存储

网卡路由配置

由于只能有一个网关,所以要添加静态路由实现双网卡通信


1、编辑网卡eth0,eth1

设置好配置文件,不添加默认网关

# vi /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0

TYPE=Ethernet

ONBOOT=yes

NM_CONTROLLED=yes

BOOTPROTO=static

IPADDR=192.168.21.23

NETMASK=255.255.255.0

 

# vi /etc/sysconfig/network-scripts/ifcfg-eth1

DEVICE=eth1

TYPE=Ethernet

ONBOOT=yes

NM_CONTROLLED=yes

BOOTPROTO=static

IPADDR=172.16.112.17

NETMASK=255.255.255.0


2、配置默认网关为任意一个,这个默认网关,决定了系统主动去使用网络时,使用的接口

修改配置文件

# vi /etc/sysconfig/network

NETWORKING=yes

HOSTNAME=oracle-1.localdomain

#NTPSERVERARGS=iburst

GATEWAYDEV=eth0


3、添加路由表

# echo “21 net_21” >>/etc/iproute2/rt_tables

# echo “112 net_112” >>/etc/iproute2/rt_tables


4、添加原路返回路由

# ip route flush table net_21

# ip route add default via 192.168.21.1 deveth0 src 192.168.21.23 table net_21

# ip rule add from 192.168.21.23 tablenet_21

 

# ip route flush table net_112

# ip route add default via 172.16.112.1 deveth1 src 172.16.112.17 table net_112

# ip rule add from 172.16.112.17 tablenet_112


5、在其他机验证是否可以ping通这两个ip

# ping 192.168.21.23

# ping 172.16.112.17


6、实现开机自动添加路由

# cat >> /etc/rc.local << Eof

>ip route flush table net_21

>ip route add default via 192.168.21.1dev eth0 src 192.168.21.23 table net_21

>ip rule add from 192.168.21.23 tablenet_21

>ip route flush table net_112

>ip route add default via 172.16.112.1dev eth1 src 172.16.112.17 table net_112

>ip rule add from 172.16.112.17 tablenet_112

>Eof

 

安装ISCSI存储发起程序

1、yum安装iscsi

# yum -y install iscsi-initiator-utils

# chkconfig iscsi on

2、建立两个iscsi发起文件

# iscsiadm -m iface -I iscsi_eth0 --op=new

# iscsiadm -m iface -I iscsi_eth1 --op=new

3、建立网卡映射关系

# iscsiadm -m iface -I iscsi_eth0--op=update -n iface.net_ifacename -v eth0

# iscsiadm -m iface -I iscsi_eth1--op=update -n iface.net_ifacename -v eth1

4、Iscsi存储发现

# iscsiadm -m discovery -t sendtargets -p192.168.21.230:3260

5、重启iscsi服务,之后查看磁盘连接情况(可以看到已经成功连接上了)

# service iscsi restart

# iscsiadm -m session


安装multipath多路径挂载磁盘

1、yum安装multipath

# yum install -y device-mapper-persistent-data device-mapper-multipathdevice-mapper-libs device-mapper-event-libs device-mapper-multipath-libsdevice-mapper device-mapper-event

2、加载multipath模块

# modprobe dm-multipath

# modprobe dm-round-robin

3、创建multipath配置文件

# cat > /etc/multipath.conf << Eof

>defaults {

>      user_friendly_names yes

>}

>Eof


4、查看挂载存储的uid号(因为是多路径,所以会出现两个相同的uid号)

# multipath -v3 | grep uid

Jan 18 16:29:59 | sdb: getuid = /lib/udev/scsi_id --whitelisted--device=/dev/%n (config file default)

Jan 18 16:29:59 | sdb: uid = 36001405a75df6ded0277d3bf3dae7ddb(callout)

Jan 18 16:29:59 | sdc: getuid = /lib/udev/scsi_id --whitelisted--device=/dev/%n (config file default)

Jan 18 16:29:59 | sdc: uid = 36001405a75df6ded0277d3bf3dae7ddb(callout)

Jan 18 16:29:59 | sdd: getuid = /lib/udev/scsi_id --whitelisted--device=/dev/%n (config file default)

Jan 18 16:29:59 | sdd: uid = 36001405b363aaa9d92bad39c9dbd7bdd (callout)

Jan 18 16:29:59 | sde: getuid = /lib/udev/scsi_id --whitelisted--device=/dev/%n (config file default)

Jan 18 16:29:59 | sde: uid = 36001405b363aaa9d92bad39c9dbd7bdd (callout)

uuid                              hcil     dev dev_t pri dm_st chk_st vend/pro


5、uid号添加进配置文件中,实现多路径访问

# cat >> /etc/multipath.conf << Eof

 >blacklist {

 >devnode "^sda"

 >devnode "^sdb"

 > devnode "^sdc"

 >}

 >multipaths{

 > multipath{

 > wwid36001405a75df6ded0277d3bf3dae7ddb

 > alias mpath1

 >}

 >multipath{

 >wwid36001405b363aaa9d92bad39c9dbd7bdd

 > alias mpath2

 > }

 >}

>Eof


6、启动服务

# /etc/init.d/multipathd start

# chkconfig multipathd on

# fdisk �Cl  (能够查看到挂载了两个multipath磁盘

/dev/mapper/mpath1

/dev/mapper/mpath2}

 

 

 

附:

  创建用户逻辑卷。

# pvcreate /dev/mapper/mpath1

# vgcreate -s 256m datavg /dev/mapper/mpath1

# lvcreate --size 2000G --name lv_src vg_data

# mkfs.ext4 /dev/mapper/vg_data-lv_src

# mkdir /src

# mount -t ext4 /dev/mapper/vg_data-lv_src /src

 

 负载均衡测试。

# cd /src

# dd if=/dev/zero of=test.img

# iostat 1

Device:           tps  Blk_read/s  Blk_wrtn/s

sda           2020.00        8.00    466272.00   # 两条线路都有数据传输,主主模式起作用。

sdb            2024.00        0.00   368952.00    # 如果只有一条线路传输数据,就是主备模式。

sdc             0.00        0.00        0.00

dm-0         4044.00        8.00    834776.00   # 合并后的路径,数据等于两条。

 

oracle挂载ASM

# /etc/init.d/oracleasm configure

# /etc/init.d/oracleasm enable

# /etc/init.d/oracleasm createdisk VOL1 /dev/mapper/mpath1

# /etc/init.d/oracleasm scandisks

# /etc/init.d/oracleasm listdisks

# oracleasm querydisk -p VOL1


本文出自 “流星宇” 博客,谢绝转载!

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