1. 解决过程
第一步,重做损坏服务器的操作系统,系统版本、参数啥的都保持一致。
第二步,配置环境。尤其是裸设备设置。这里是的udev 管理。确保新安装的节点能访问存储。
第三步,新建oracle 用户,注意uid 和gid 都要完全一致,配置互信机制。
第四步,在幸存的节点上tar -cvf 出所有的oracle 文件,主要是CRS 和RDBMS 文件。将tar文件复制到新建节点上。到此,我们实现类似RAC 新安装过程中最后执行root.sh 前的所有操作。
第五步,我们在新节点上执行root.sh ,配置CRS 。
这个脚本我分析了很久,确认安全后执行的。将一些配置信息写入的/etc/init.d 等目录中。OCR 中因为已经有这个节点的资源了,所以会自动显示成功配置。
[[email protected] crs_1]# more root.sh
#!/bin/sh
/u01/app/oracle/product/10.2.0/crs_1/install/rootinstall
/u01/app/oracle/product/10.2.0/crs_1/install/rootconfig
[[email protected] 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
Checking to see if Oracle CRS stack is already configured
/etc/oracle does not exist. Creating it now.
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
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 <nodenumber>: <nodename> <private interconnect name> <hostname>
node 1: webrac1 webrac1-priv webrac1
node 2: webrac2 webrac2-priv webrac2
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.
webrac1
webrac2
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 (0) 节点上创建 VIP 应用程序资源 .
在 (0) 节点上创建 GSD 应用程序资源 .
在 (0) 节点上创建 ONS 应用程序资源 .
启动 (2) 节点上的 VIP 应用程序资源 ...
启动 (2) 节点上的 GSD 应用程序资源 ...
启动 (2) 节点上的 ONS 应用程序资源 ...
Done.
第六步,修改配置文件/etc/oratab
这个文件从幸存节点拷贝过来,修改一下属性和内容。
[[email protected] archivelog]# scp /etc/oratab webrac1:/etc/
[email protected]'s password:
oratab
100% 766 0.8KB/s 00:00
[[email protected] archivelog]#
[[email protected] etc]# chown -R oracle:root oratab
[[email protected] etc]# ls -ltr oratab
-rw-r--r-- 1 oracle root 766 05-08 17:12 oratab
[[email protected] etc]# vi oratab
#
+ASM1:/u01/app/oracle/product/10.2.0/db_1:N
webdb:/u01/app/oracle/product/10.2.0/db_1:N
~
第七步,执行RDBMS 下的root.sh
[[email protected] db_1]# ./root.sh
Running Oracle10 root.sh script...
The following environment variables are set as:
ORACLE_OWNER= oracle
ORACLE_HOME= /u01/app/oracle/product/10.2.0/db_1
Enter the full pathname of the local bin directory: [/usr/local/bin]:
Copying dbhome to /usr/local/bin ...
Copying oraenv to /usr/local/bin ...
Copying coraenv to /usr/local/bin ...
Entries will be added to the /etc/oratab file as needed by
Database Configuration Assistant when a database is created
Finished running generic part of root.sh script.
Now product-specific root actions will be performed.
第八步,修改配置文件$ORACLE_HOME/network/admin/listener.ora
原来的监听器文件的配置是基于节点2 的,所有这里修改成符合节点1 的。这个修改很容易。
LISTENER_WEBRAC1 =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = webrac1-vip)(PORT = 1521)(IP = FIRST))
)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.10.42)(PORT = 1521)(IP = FIRST))
)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
)
)
)
第九步,修改配置文件$ORACLE_HOME/dbs 下的spfile 文件和密码文件,对象为ASM 实例和数据库实例。
只要修改一下文件名称就可以,例如:
cp orapw+ASM2 orapw+ASM1
cp spfile+ASM2.ora spfile+ASM1.ora
第十步,使用crs_start -all 启动所有资源。
经过这十步,新系统被快速加入到RAC 中。整个过程中,不需要停数据库服务。
[[email protected] ~]$ crs_stat -t
名称 类型 目标 状态 主机
------------------------------------------------------------
ora.webdb.db application ONLINE ONLINE webrac2
ora....ebdb.cs application ONLINE ONLINE webrac2
ora....db1.srv application ONLINE ONLINE webrac2
ora....b1.inst application ONLINE ONLINE webrac1
ora....b2.inst application ONLINE ONLINE webrac2
ora....SM1.asm application ONLINE ONLINE webrac1
ora....C1.lsnr application ONLINE ONLINE webrac1
ora....ac1.gsd application ONLINE ONLINE webrac1
ora....ac1.ons application ONLINE ONLINE webrac1
ora....ac1.vip application ONLINE ONLINE webrac1
ora....SM2.asm application ONLINE ONLINE webrac2
ora....C2.lsnr application ONLINE ONLINE webrac2
ora....ac2.gsd application ONLINE ONLINE webrac2
ora....ac2.ons application ONLINE ONLINE webrac2
ora....ac2.vip application ONLINE ONLINE webrac2
[[email protected] ~]$
2. 总结
这个问题关键点在于 $CRS 目录中 root.sh 文件,这个文件在 /etc 等目录下创建了一些文件。这些文件,如果你很清楚,也可以手工去创建。
RAC 整个环境都是正常的, OCR 配置在存储上正常访问,所以问题本质上也就是配置配置访问链接。