RAC环境下的备份与恢复（五）

在前面的几个章节中，简要的介绍了在rac环境下对数据库执行备份和完全恢复，rac环境同单实例环境相比，除了需要备份控制文件，日志文件，数据文件和参数文件外，还需要对ocr和表决盘进行日常备份！下面来简要的介绍下votedisk和ocr的备份和恢复！

一：表决盘的备份，Voting disk记录节点成员信息，如包含哪些节点成员、节点的添加删除信息记录，大小为20MB
查看voting disk位置：

[oracle@rac1 ~]$ crsctl query css votedisk  0.     0    /dev/raw/raw7  1.     0    /dev/raw/raw8  2.     0    /dev/raw/raw9 located 3 votedisk(s). 备份表决盘 [oracle@rac1 ~]$ dd if=/dev/raw/raw7 of=votedisk.bak 587744+0 records in 587744+0 records out

二：OCR的备份，OCR记录节点成员的配置信息,如database、ASM、instance、listener、VIP等CRS资源的配置信息，可存储于裸设备或者群集文件系统上,推荐设置大小为100MB，备份使用root用户操作

查看OCR所在的磁盘或裸设备位置

[root@rac1 ~]# cat /etc/oracle/ocr.loc ocrconfig_loc=/dev/raw/raw5 ocrmirrorconfig_loc=/dev/raw/raw6 local_only=FALSE [oracle@rac1 ~]$ ocrcheck Status of Oracle Cluster Registry is as follows :          Version                  :          2          Total space (kbytes)     :     293624          Used space (kbytes)      :       3864          Available space (kbytes) :     289760          ID                       :  450284450          Device/File Name         : /dev/raw/raw5                                     Device/File integrity check succeeded          Device/File Name         : /dev/raw/raw6                                     Device/File integrity check succeeded          Cluster registry integrity check succeeded 备份OCR [root@rac1 ~]# /u01/app/oracle/product/10.2.0/crs_1/bin/ocrconfig -export /home/oracle/ocrbak.dbf [root@rac1 ~]# file /home/oracle/ocrbak.dbf /home/oracle/ocrbak.dbf: data

三：关闭数据库和所有crs服务后，对表决盘和ocr进行破坏

[oracle@rac1 ~]$ srvctl stop database -d racdb -o immediate [oracle@rac1 ~]$ crs_stop -all [oracle@rac1 ~]$ crs_stat -t -v Name           Type           R/RA   F/FT   Target    State     Host        ---------------------------------------------------------------------- ora....SM1.asm application    0/5    0/0    OFFLINE   OFFLINE               ora....C1.lsnr application    0/5    0/0    OFFLINE   OFFLINE               ora.rac1.gsd   application    0/5    0/0    OFFLINE   OFFLINE               ora.rac1.ons   application    0/3    0/0    OFFLINE   OFFLINE               ora.rac1.vip   application    0/0    0/0    OFFLINE   OFFLINE               ora....SM2.asm application    0/5    0/0    OFFLINE   OFFLINE               ora....C2.lsnr application    0/5    0/0    OFFLINE   OFFLINE               ora.rac2.gsd   application    0/5    0/0    OFFLINE   OFFLINE               ora.rac2.ons   application    0/3    0/0    OFFLINE   OFFLINE               ora.rac2.vip   application    0/0    0/0    OFFLINE   OFFLINE               ora.racdb.db   application    0/0    0/1    OFFLINE   OFFLINE               ora....b1.inst application    0/5    0/0    OFFLINE   OFFLINE               ora....b2.inst application    0/5    0/0    OFFLINE   OFFLINE   [root@rac1 ~]# for i in {5..9};do dd if=/dev/zero of=/dev/raw/raw$i bs=50M count=2; done 读入了 2+0 个块 输出了 2+0 个块 读入了 2+0 个块 输出了 2+0 个块 读入了 2+0 个块 输出了 2+0 个块 读入了 2+0 个块 输出了 2+0 个块 读入了 2+0 个块 输出了 2+0 个块 破坏完成后，查询表决盘和启动crs服务将报错 [root@rac1 ~]# /u01/app/oracle/product/10.2.0/crs_1/bin/crsctl check crs CSS appears healthy CRS appears healthy EVM appears healthy [root@rac1 ~]# /u01/app/oracle/product/10.2.0/crs_1/bin/crsctl query css votedisk OCR initialization failed accessing OCR device: PROC-26: Error while accessing the physical storage [oracle@rac1 ~]$ crs_start -all rac1 : CRS-1019: Resource ora.rac2.ASM2.asm (application) cannot run on rac1 rac1 : CRS-1019: Resource ora.rac2.ASM2.asm (application) cannot run on rac1 CRS-0184: Cannot communicate with the CRS daemon.

四：利用备份恢复表决盘和ocr

[root@rac1 ~]# for i in {7..9};do dd if=/home/oracle/votedisk.bak of=/dev/raw/raw$i;done 读入了 587744+0 个块 输出了 587744+0 个块 读入了 587744+0 个块 输出了 587744+0 个块 读入了 587744+0 个块 输出了 587744+0 个块 表决盘恢复后，crs服务依旧无法启动 [oracle@rac1 ~]$ crs_start -all CRS-0184: Cannot communicate with the CRS daemon. 这个时候对表决盘进行查询，发现格式不对 [oracle@rac1 ~]$ crsctl query css votedisk OCR initialization failed with invalid format: PROC-22: The OCR backend has an invalid format 恢复ocr [root@rac1 ~]# /u01/app/oracle/product/10.2.0/crs_1/bin/ocrconfig -import /home/oracle/ocrbak.dbf [oracle@rac1 ~]$ crsctl query css votedisk  0.     0    /dev/raw/raw7  1.     0    /dev/raw/raw8  2.     0    /dev/raw/raw9 located 3 votedisk(s). 重启crs进程后，一切正常！ [root@rac1 ~]# /u01/app/oracle/product/10.2.0/crs_1/bin/crsctl stop crs Stopping resources. This could take several minutes. Successfully stopped CRS resources. Stopping CSSD. Shutting down CSS daemon. Shutdown request successfully issued. [root@rac1 ~]# /u01/app/oracle/product/10.2.0/crs_1/bin/crsctl start crs Attempting to start CRS stack The CRS stack will be started shortly [oracle@rac1 ~]$ crs_stat -t -v Name           Type           R/RA   F/FT   Target    State     Host        ---------------------------------------------------------------------- ora....SM1.asm application    0/5    0/0    ONLINE    ONLINE    rac1        ora....C1.lsnr application    0/5    0/0    ONLINE    ONLINE    rac1        ora.rac1.gsd   application    0/5    0/0    ONLINE    ONLINE    rac1        ora.rac1.ons   application    0/3    0/0    ONLINE    ONLINE    rac1        ora.rac1.vip   application    0/0    0/0    ONLINE    ONLINE    rac1        ora....SM2.asm application    0/5    0/0    ONLINE    ONLINE    rac2        ora....C2.lsnr application    0/5    0/0    ONLINE    ONLINE    rac2        ora.rac2.gsd   application    0/5    0/0    ONLINE    ONLINE    rac2        ora.rac2.ons   application    0/3    0/0    ONLINE    ONLINE    rac2        ora.rac2.vip   application    0/0    0/0    ONLINE    ONLINE    rac2        ora.racdb.db   application    0/0    0/1    ONLINE    ONLINE    rac2        ora....b1.inst application    0/5    0/0    ONLINE    ONLINE    rac1        ora....b2.inst application    0/5    0/0    ONLINE    ONLINE    rac2       [oracle@rac1 ~]$ ocrcheck Status of Oracle Cluster Registry is as follows :          Version                  :          2          Total space (kbytes)     :     293624          Used space (kbytes)      :       3864          Available space (kbytes) :     289760          ID                       :  450284450          Device/File Name         : /dev/raw/raw5                                     Device/File integrity check succeeded          Device/File Name         : /dev/raw/raw6                                     Device/File integrity check succeeded          Cluster registry integrity check succeeded

五：在ocr和表决盘未备份的情况下，进行恢复，ocr每4个小时会自动备份一次，这些备份可以通过ocrconfig -showbackup命令来查看

1：关闭数据库实例和crs所有服务后对votedisk和ocr进行破坏操作

[oracle@rac1 ~]$ crs_stat -t Name           Type           Target    State     Host        ------------------------------------------------------------ ora....SM1.asm application    ONLINE    ONLINE    rac1        ora....C1.lsnr application    ONLINE    ONLINE    rac1        ora.rac1.gsd   application    ONLINE    ONLINE    rac1        ora.rac1.ons   application    ONLINE    ONLINE    rac1        ora.rac1.vip   application    ONLINE    ONLINE    rac1        ora....SM2.asm application    ONLINE    ONLINE    rac2        ora....C2.lsnr application    ONLINE    ONLINE    rac2        ora.rac2.gsd   application    ONLINE    ONLINE    rac2        ora.rac2.ons   application    ONLINE    ONLINE    rac2        ora.rac2.vip   application    ONLINE    ONLINE    rac2        ora.racdb.db   application    ONLINE    ONLINE    rac2        ora....b1.inst application    ONLINE    ONLINE    rac1        ora....b2.inst application    ONLINE    ONLINE    rac2   [oracle@rac1 ~]$ srvctl  stop database -d racdb -o immediate [oracle@rac1 ~]$ crs_stop -all Attempting to stop `ora.rac1.gsd` on member `rac1` Attempting to stop `ora.rac1.ons` on member `rac1` Attempting to stop `ora.rac2.gsd` on member `rac2` Attempting to stop `ora.rac2.ons` on member `rac2` Stop of `ora.rac1.gsd` on member `rac1` succeeded. Stop of `ora.rac2.gsd` on member `rac2` succeeded. Stop of `ora.rac1.ons` on member `rac1` succeeded. Stop of `ora.rac2.ons` on member `rac2` succeeded. Attempting to stop `ora.rac1.LISTENER_RAC1.lsnr` on member `rac1` Attempting to stop `ora.rac1.ASM1.asm` on member `rac1` Attempting to stop `ora.rac2.LISTENER_RAC2.lsnr` on member `rac2` Attempting to stop `ora.rac2.ASM2.asm` on member `rac2` Stop of `ora.rac1.LISTENER_RAC1.lsnr` on member `rac1` succeeded. Stop of `ora.rac2.LISTENER_RAC2.lsnr` on member `rac2` succeeded. Attempting to stop `ora.rac1.vip` on member `rac1` Attempting to stop `ora.rac2.vip` on member `rac2` Stop of `ora.rac1.vip` on member `rac1` succeeded. Stop of `ora.rac2.vip` on member `rac2` succeeded. Stop of `ora.rac2.ASM2.asm` on member `rac2` succeeded. Stop of `ora.rac1.ASM1.asm` on member `rac1` succeeded. [root@rac1 ~]# /u01/app/oracle/product/10.2.0/crs_1/bin/crsctl stop crs Stopping resources. This could take several minutes. Successfully stopped CRS resources. Stopping CSSD. Shutting down CSS daemon. Shutdown request successfully issued. [root@rac2 ~]#  /u01/app/oracle/product/10.2.0/crs_1/bin/crsctl stop crs Stopping resources. This could take several minutes. Successfully stopped CRS resources. Stopping CSSD. Shutting down CSS daemon. Shutdown request successfully issued. [root@rac1 ~]# for i in {5..9};do dd if=/dev/zero of=/dev/raw/raw$i bs=20M count=3; done 读入了 3+0 个块 输出了 3+0 个块 读入了 3+0 个块 输出了 3+0 个块 读入了 3+0 个块 输出了 3+0 个块 读入了 3+0 个块 输出了 3+0 个块 读入了 3+0 个块 输出了 3+0 个块

2：启动crs服务将报错

[root@rac1 ~]# /u01/app/oracle/product/10.2.0/crs_1/bin/crsctl start crs Attempting to start CRS stack The CRS stack will be started shortly [oracle@rac1 ~]$ crsctl query css votedisk OCR initialization failed accessing OCR device: PROC-26: Error while accessing the physical storage [oracle@rac1 ~]$ ocrcheck PROT-602: Failed to retrieve data from the cluster registry [root@rac1 ~]# /u01/app/oracle/product/10.2.0/crs_1/bin/crsctl check crs Failure 1 contacting CSS daemon Cannot communicate with CRS Cannot communicate with EVM [root@rac2 ~]# /u01/app/oracle/product/10.2.0/crs_1/bin/crsctl check crs Failure 1 contacting CSS daemon Cannot communicate with CRS Cannot communicate with EVM

3：在rac环境中的各个节点上运行$ORA_CRS_HOME/install/rootdelete.sh脚本

[root@rac1 ~]# /u01/app/oracle/product/10.2.0/crs_1/install/rootdelete.sh Shutting down Oracle Cluster Ready Services (CRS): OCR initialization failed accessing OCR device: PROC-26: Error while accessing the physical storage Shutdown has begun. The daemons should exit soon. Checking to see if Oracle CRS stack is down... Oracle CRS stack is not running. Oracle CRS stack is down now. Removing script for Oracle Cluster Ready services Updating ocr file for downgrade Cleaning up SCR settings in '/etc/oracle/scls_scr' Cleaning up Network socket directories [root@rac2 ~]# /u01/app/oracle/product/10.2.0/crs_1/install/rootdelete.sh Shutting down Oracle Cluster Ready Services (CRS): OCR initialization failed accessing OCR device: PROC-26: Error while accessing the physical storage Shutdown has begun. The daemons should exit soon. Checking to see if Oracle CRS stack is down... Oracle CRS stack is not running. Oracle CRS stack is down now. Removing script for Oracle Cluster Ready services Updating ocr file for downgrade Cleaning up SCR settings in '/etc/oracle/scls_scr' Cleaning up Network socket directories

4:在任意一个节点中运行$ORA_CRS_HOME/install/rootdeinstall.sh脚本

[root@rac1 ~]# /u01/app/oracle/product/10.2.0/crs_1/install/rootdeinstall.sh Removing contents from OCR mirror device 读入了 2560+0 个块 输出了 2560+0 个块 Removing contents from OCR device 读入了 2560+0 个块 输出了 2560+0 个块

5:在rac环境中的各个节点上运行$ORA_CRS_HOME/root.sh脚本

[root@rac1 ~]# /u01/app/oracle/product/10.2.0/crs_1/root.sh WARNING: directory '/u01/app/oracle/product/10.2.0' is not owned by root WARNING: directory '/u01/app/oracle/product' is not owned by root WARNING: directory '/u01/app/oracle' is not owned by root WARNING: directory '/u01/app' is not owned by root WARNING: directory '/u01' is not owned by root No value set for the CRS parameter CRS_OCR_LOCATIONS. Using Values in paramfile.crs Checking to see if Oracle CRS stack is already configured Setting the permissions on OCR backup directory Setting up NS directories Oracle Cluster Registry configuration upgraded successfully WARNING: directory '/u01/app/oracle/product/10.2.0' is not owned by root WARNING: directory '/u01/app/oracle/product' is not owned by root WARNING: directory '/u01/app/oracle' is not owned by root WARNING: directory '/u01/app' is not owned by root WARNING: directory '/u01' is not owned by root Successfully accumulated necessary OCR keys. Using ports: CSS=49895 CRS=49896 EVMC=49898 and EVMR=49897. node : node 1: rac1 rac1-priv rac1 node 2: rac2 rac2-priv rac2 Creating OCR keys for user 'root', privgrp 'root'.. Operation successful. Now formatting voting device: /dev/raw/raw7 Now formatting voting device: /dev/raw/raw8 Now formatting voting device: /dev/raw/raw9 Format of 3 voting devices complete. Startup will be queued to init within 30 seconds. Adding daemons to inittab Expecting the CRS daemons to be up within 600 seconds. CSS is active on these nodes.         rac1 CSS is inactive on these nodes.         rac2 Local node checking complete. Run root.sh on remaining nodes to start CRS daemons. [root@rac2 ~]# /u01/app/oracle/product/10.2.0/crs_1/root.sh WARNING: directory '/u01/app/oracle/product/10.2.0' is not owned by root WARNING: directory '/u01/app/oracle/product' is not owned by root WARNING: directory '/u01/app/oracle' is not owned by root WARNING: directory '/u01/app' is not owned by root WARNING: directory '/u01' is not owned by root No value set for the CRS parameter CRS_OCR_LOCATIONS. Using Values in paramfile.crs Checking to see if Oracle CRS stack is already configured Setting the permissions on OCR backup directory Setting up NS directories Oracle Cluster Registry configuration upgraded successfully WARNING: directory '/u01/app/oracle/product/10.2.0' is not owned by root WARNING: directory '/u01/app/oracle/product' is not owned by root WARNING: directory '/u01/app/oracle' is not owned by root WARNING: directory '/u01/app' is not owned by root WARNING: directory '/u01' is not owned by root clscfg: EXISTING configuration version 3 detected. clscfg: version 3 is 10G Release 2. Successfully accumulated necessary OCR keys. Using ports: CSS=49895 CRS=49896 EVMC=49898 and EVMR=49897. node : node 1: rac1 rac1-priv rac1 node 2: rac2 rac2-priv rac2 clscfg: Arguments check out successfully. NO KEYS WERE WRITTEN. Supply -force parameter to override. -force is destructive and will destroy any previous cluster configuration. Oracle Cluster Registry for cluster has already been initialized Startup will be queued to init within 30 seconds. Adding daemons to inittab Expecting the CRS daemons to be up within 600 seconds. CSS is active on these nodes.         rac1         rac2 CSS is active on all nodes. Waiting for the Oracle CRSD and EVMD to start Oracle CRS stack installed and running under init(1M) Running vipca(silent) for configuring nodeapps 在输入参数中指定的接口 "255.255.255.0/eth0" 无效。

在第二个节点中运行脚本到最后将报错，这个时候就和安装rac时候一样的处理方法，在节点2上使用root用户运行vipca
[root@rac2 ~]# /u01/app/oracle/product/10.2.0/crs_1/bin/vipca

[oracle@rac1 ~]$ crs_stat -t -v Name           Type           R/RA   F/FT   Target    State     Host        ---------------------------------------------------------------------- ora.rac1.gsd   application    0/5    0/0    ONLINE    ONLINE    rac1        ora.rac1.ons   application    0/3    0/0    ONLINE    ONLINE    rac1        ora.rac1.vip   application    0/0    0/0    ONLINE    ONLINE    rac1        ora.rac2.gsd   application    0/5    0/0    ONLINE    ONLINE    rac2        ora.rac2.ons   application    0/3    0/0    ONLINE    ONLINE    rac2        ora.rac2.vip   application    0/0    0/0    ONLINE    ONLINE    rac2

5：添加listener到ocr中
[oracle@rac1 ~]$ netca

[oracle@rac1 ~]$ crs_stat -t -v Name           Type           R/RA   F/FT   Target    State     Host        ---------------------------------------------------------------------- ora....C1.lsnr application    0/5    0/0    ONLINE    ONLINE    rac1        ora.rac1.gsd   application    0/5    0/0    ONLINE    ONLINE    rac1        ora.rac1.ons   application    0/3    0/0    ONLINE    ONLINE    rac1        ora.rac1.vip   application    0/0    0/0    ONLINE    ONLINE    rac1        ora....C2.lsnr application    0/5    0/0    ONLINE    ONLINE    rac2        ora.rac2.gsd   application    0/5    0/0    ONLINE    ONLINE    rac2        ora.rac2.ons   application    0/3    0/0    ONLINE    ONLINE    rac2        ora.rac2.vip   application    0/0    0/0    ONLINE    ONLINE    rac2

6：添加ASM实例

[oracle@rac1 ~]$ srvctl add asm -n rac1 -i +ASM1 -o /u01/app/oracle/product/10.2.0/db_1/ [oracle@rac1 ~]$ srvctl add asm -n rac2 -i +ASM2 -o /u01/app/oracle/product/10.2.0/db_1/ [oracle@rac1 ~]$ crs_stat -t -v Name           Type           R/RA   F/FT   Target    State     Host        ---------------------------------------------------------------------- ora....SM1.asm application    0/5    0/0    OFFLINE   OFFLINE               ora....C1.lsnr application    0/5    0/0    ONLINE    ONLINE    rac1        ora.rac1.gsd   application    0/5    0/0    ONLINE    ONLINE    rac1        ora.rac1.ons   application    0/3    0/0    ONLINE    ONLINE    rac1        ora.rac1.vip   application    0/0    0/0    ONLINE    ONLINE    rac1        ora....SM2.asm application    0/5    0/0    OFFLINE   OFFLINE               ora....C2.lsnr application    0/5    0/0    ONLINE    ONLINE    rac2        ora.rac2.gsd   application    0/5    0/0    ONLINE    ONLINE    rac2        ora.rac2.ons   application    0/3    0/0    ONLINE    ONLINE    rac2        ora.rac2.vip   application    0/0    0/0    ONLINE    ONLINE    rac2 [oracle@rac1 ~]$ srvctl start asm -n rac1 [oracle@rac1 ~]$ srvctl start asm -n rac2 [oracle@rac1 ~]$ srvctl status asm -n rac1 ASM instance +ASM1 is running on node rac1. [oracle@rac1 ~]$ srvctl status asm -n rac2 ASM instance +ASM2 is running on node rac2.

7：添加数据库和数据库实例

[oracle@rac1 ~]$ srvctl add database -d racdb -o /u01/app/oracle/product/10.2.0/db_1/ [oracle@rac1 ~]$ srvctl add instance -d racdb -i racdb1 -n rac1 [oracle@rac1 ~]$ srvctl add instance -d racdb -i racdb2 -n rac2 [oracle@rac1 ~]$ crs_stat -t -v Name           Type           R/RA   F/FT   Target    State     Host        ---------------------------------------------------------------------- ora....SM1.asm application    0/5    0/0    ONLINE    ONLINE    rac1        ora....C1.lsnr application    0/5    0/0    ONLINE    ONLINE    rac1        ora.rac1.gsd   application    0/5    0/0    ONLINE    ONLINE    rac1        ora.rac1.ons   application    0/3    0/0    ONLINE    ONLINE    rac1        ora.rac1.vip   application    0/0    0/0    ONLINE    ONLINE    rac1        ora....SM2.asm application    0/5    0/0    ONLINE    ONLINE    rac2        ora....C2.lsnr application    0/5    0/0    ONLINE    ONLINE    rac2        ora.rac2.gsd   application    0/5    0/0    ONLINE    ONLINE    rac2        ora.rac2.ons   application    0/3    0/0    ONLINE    ONLINE    rac2        ora.rac2.vip   application    0/0    0/0    ONLINE    ONLINE    rac2        ora.racdb.db   application    0/0    0/1    OFFLINE   OFFLINE               ora....b1.inst application    0/5    0/0    OFFLINE   OFFLINE               ora....b2.inst application    0/5    0/0    OFFLINE   OFFLINE       [oracle@rac1 ~]$ srvctl  start database -d racdb [oracle@rac1 ~]$ srvctl  status database -d racdb Instance racdb1 is running on node rac1 Instance racdb2 is running on node rac2