虚拟机模拟部署Extended Clusters（一）基础环境准备

操作系统版本：

Red Hat Enterprise Linux Server release 6.8 (Santiago)

网络配置：

eth0 ，eth1 用户rac的通信网络和心跳网络。 eth2 用于磁盘网络iscsi。

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000     /ether 00:0c:29:1e:dd:db brd ff:ff:ff:ff:ff:ff    inet 192.168.0.230/24 brd 192.168.0.255 scope global eth0    inet 192.168.0.232/24 brd 192.168.0.255 scope global secondary eth0:1    inet6 fe80::20c:29ff:fe1e:dddb/64 scope          valid_lft forever preferred_lft forever3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000     /ether 00:0c:29:1e:dd:e5 brd ff:ff:ff:ff:ff:ff    inet 17.17.0.1/24 brd 17.17.0.255 scope global eth1    inet 169.254.237.99/16 brd 169.254.255.255 scope global eth1:1    inet6 fe80::20c:29ff:fe1e:dde5/64 scope          valid_lft forever preferred_lft forever4: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000     /ether 00:0c:29:1e:dd:ef brd ff:ff:ff:ff:ff:ff    inet 10.0.0.200/24 brd 10.0.0.255 scope global eth2    inet6 fe80::20c:29ff:fe1e:ddef/64 scope          valid_lft forever preferred_lft forever

磁盘配置

prod01:
Device "/dev/mapper/rootvg-lvol0" is marked an ASM disk with the label "VOTEDB01"
Device "/dev/sdb1" is marked an ASM disk with the label "NODE01DATA01"

<target iqn.2016-08.disk.rh6:disk200m>        backing-store /dev/sdb1        backing-store /dev/sdb2    backing-store /dev/mapper/rootvg-lvol0</target>

prod02：

Device "/dev/mapper/rootvg-lvol0" is marked an ASM disk with the label "VOTEDB02"
Device "/dev/sdc1" is marked an ASM disk with the label "NODE02DATA01"

[root@prod02 ~]# cat /etc/tgt/targets.conf <target iqn.2016-08.disk.rh6:disk200m>        backing-store /dev/sdc1        backing-store /dev/mapper/rootvg-lvol0</target>

prod01 本地拥有磁盘VOTEDB01，NODE01DATA01

prod02 本地拥有磁盘VOTEDB02,NODE02DATA01

prod01,prod02 通过iscsi，通过eth2网络把本地磁盘映射到对方。

磁盘部署情况

DISK03 共享磁盘，2台prod01,prod02都可见，eth2网络中断不受影响。

[root@prod01 ~]# oracleasm  listdisksDISK03NODE01DATA01NODE02DATA01VOTEDB01VOTEDB02[root@prod02 ~]# oracleasm listdisksDISK03NODE01DATA01NODE02DATA01VOTEDB01VOTEDB02

当eth2 down ，prod01 能读写（DISK03，NODE01DATA01，VOTEDB01），prod02能读写（DISK03，NODE02DATA01，VOTEDB02）

集群asm 配置情况：

/dev/oracleasm/disks/DISK03 仲裁磁盘（QUORUM disk）
crs(DISK03,VOTEDB02,VOTEDB01)

ocr(NODE01DATA01,NODE02DATA01)

DG_NAME     DG_STATE   TYPE       DSK_NO DSK_NAME    PATH                           MOUNT_S FAILGROUP        STATE--------------- ---------- ------ ---------- ---------- -------------------------------------------------- ------- -------------------- --------CRS        MOUNTED    NORMAL       2 CRS_0002    /dev/oracleasm/disks/DISK03               CACHED  ZCDISK        NORMALCRS        MOUNTED    NORMAL       5 CRS_0005    /dev/oracleasm/disks/VOTEDB02               CACHED  CRS_0001        NORMALCRS        MOUNTED    NORMAL       9 CRS_0009    /dev/oracleasm/disks/VOTEDB01               CACHED  CRS_0000        NORMALOCR        MOUNTED    NORMAL       0 OCR_0000    /dev/oracleasm/disks/NODE01DATA01           CACHED  OCR_0000        NORMALOCR        MOUNTED    NORMAL       1 OCR_0001    /dev/oracleasm/disks/NODE02DATA01           CACHED  OCR_0001        NORMALDISK_NUMBER NAME       PATH                          HEADER_STATUS         OS_MB   TOTAL_MB    FREE_MB REPAIR_TIMER V FAILGRO----------- ---------- -------------------------------------------------- -------------------- ---------- ---------- ---------- ------------ - -------      0 OCR_0000   /dev/oracleasm/disks/NODE01DATA01          MEMBER             5120    5120       3185        0 N REGULAR      1 OCR_0001   /dev/oracleasm/disks/NODE02DATA01          MEMBER             5120    5120       3185        0 N REGULAR      9 CRS_0009   /dev/oracleasm/disks/VOTEDB01              MEMBER             2048    2048       1584        0 Y REGULAR      5 CRS_0005   /dev/oracleasm/disks/VOTEDB02              MEMBER             2048    2048       1648        0 Y REGULAR      2 CRS_0002   /dev/oracleasm/disks/DISK03              MEMBER             5115    5115       5081        0 Y QUORUMGROUP_NUMBER NAME    COMPATIBILITY                             DATA _COMPATIBILITY                      V------------ ---------- ------------------------------------------------------------ ------------------------------------------------------------ -       1 OCR    11.2.0.0.0                             11.2.0.0.0                           N       2 CRS    11.2.0.0.0                             11.2.0.0.0                           YSQL>