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Oracle Study之--Oracle 11gR2构建RAC之hosts文件故障
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系统环境：RedHat EL55
Oracle： Oracle 11gR2 +GI
在安装GI，运行root.sh script时，其中一个node出现以下错误：
[root@node2 ctssd]# /u01/11.2.0/grid/root.sh
Running Oracle 11g root.sh script... The following environment variables are set as: ORACLE_OWNER= grid ORACLE_HOME= /u01/11.2.0/grid Enter the full pathname of the local bin directory: [/usr/local/bin]: The file "dbhome" already exists in /usr/local/bin. Overwrite it? (y/n) [n]: y Copying dbhome to /usr/local/bin ... The file "oraenv" already exists in /usr/local/bin. Overwrite it? (y/n) [n]: y Copying oraenv to /usr/local/bin ... The file "coraenv" already exists in /usr/local/bin. Overwrite it? (y/n) [n]: y 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. 2016-03-16 16:18:11: Parsing the host name 2016-03-16 16:18:11: Checking for super user privileges 2016-03-16 16:18:11: User has super user privileges Using configuration parameter file: /u01/11.2.0/grid/crs/install/crsconfig_params LOCAL ADD MODE Creating OCR keys for user 'root', privgrp 'root'.. Operation successful. Adding daemon to inittab CRS-4123: Oracle High Availability Services has been started. ohasd is starting CRS-4402: The CSS daemon was started in exclusive mode but found an active CSS daemon on node node1, number 1, and is terminating An active cluster was found during exclusive startup, restarting to join the cluster CRS-2672: Attempting to start 'ora.mDNSd' on 'node2' CRS-2676: Start of 'ora.mdnsd' on 'node2' succeeded CRS-2672: Attempting to start 'ora.gipcd' on 'node2' CRS-2676: Start of 'ora.gipcd' on 'node2' succeeded CRS-2672: Attempting to start 'ora.gpnpd' on 'node2' CRS-2676: Start of 'ora.gpnpd' on 'node2' succeeded CRS-2672: Attempting to start 'ora.cssdmonitor' on 'node2' CRS-2676: Start of 'ora.cssdmonitor' on 'node2' succeeded CRS-2672: Attempting to start 'ora.cssd' on 'node2' CRS-2672: Attempting to start 'ora.diskmon' on 'node2' CRS-2676: Start of 'ora.diskmon' on 'node2' succeeded CRS-2676: Start of 'ora.cssd' on 'node2' succeeded CRS-2672: Attempting to start 'ora.ctssd' on 'node2'
Failure with signal 2 from command: /u01/11.2.0/grid/bin/crsctl start resource ora.ctssd -init -env USR_ORA_ENV=CTSS_REBOOT=TRUE
Start of resource "ora.ctssd -init -env USR_ORA_ENV=CTSS_REBOOT=TRUE" failed
Failed to start CTSS
Failed to start Oracle Clusterware stack
Oracle root script execution aborted!
----- 启动ctssd 进程失败 ！
经检查发现，在node2的hosts文件出现以下错误：
[oracle@node2 ~]$ cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 node1 localhost.localdomain localhost
::1 localhost6.localdomain6 localhost6
192.168.3.101 node1
192.168.3.111 node1-vip
10.10.10.1 node1-priv
192.168.3.102 node2
192.168.3.112 node2-vip
10.10.10.2 node2-priv
192.168.3.12 rac-scan
------- 127.0.0.1 被解析成另一个node的主机名（node1）
改为：
127.0.0.1 localhost.localdomain localhost
重新运行root.sh脚本后成功！
[root@node2 install]# crsctl check crs
CRS-4638: Oracle High Availability Services is online CRS-4537: Cluster Ready Services is online CRS-4529: Cluster Synchronization Services is online CRS-4533: Event Manager is online
[root@node2 install]# crs_stat -t
Name Type Target State Host ------------------------------------------------------------ ora....N1.lsnr ora....er.type ONLINE ONLINE node1 ora....VOTE.dg ora....up.type ONLINE ONLINE node1 ora.asm ora.asm.type ONLINE ONLINE node1 ora.eons ora.eons.type ONLINE ONLINE node1 ora.gsd ora.gsd.type OFFLINE OFFLINE ora....network ora....rk.type ONLINE ONLINE node1 ora....SM1.asm application ONLINE ONLINE node1 ora.node1.gsd application OFFLINE OFFLINE ora.node1.ons application ONLINE ONLINE node1 ora.node1.vip ora....t1.type ONLINE ONLINE node1 ora....SM2.asm application ONLINE ONLINE node2 ora.node2.gsd application OFFLINE OFFLINE ora.node2.ons application ONLINE ONLINE node2 ora.node2.vip ora....t1.type ONLINE ONLINE node2 ora.oc4j ora.oc4j.type OFFLINE OFFLINE ora.ons ora.ons.type ONLINE ONLINE node1 ora....ry.acfs ora....fs.type ONLINE ONLINE node1 ora.scan1.vip ora....ip.type ONLINE ONLINE node1
