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RHEL 7 安装oracle rac 11.2.0.4执行root.sh报错ohasd failed to start
作者：
Anshen
RHEL 7 安装oracle rac 11.2.0.4执行root.sh报错ohasd failed to start
报错信息：
/u01/app/oraInventory/orainstRoot.sh
Changing permissions of /u01/app/oraInventory.
Adding read,write permissions for group.
Removing read,write,execute permissions for world.
Changing groupname of /u01/app/oraInventory to oinstall.
The execution of the script is complete.
/u01/app/11.2.0/grid/root.sh
Performing root user operation for Oracle 11g
The following environment variables are set as:
ORACLE_OWNER= grid
ORACLE_HOME= /u01/app/11.2.0/grid
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 ...
Creating /etc/oratab file...
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 script.
Now product-specific root actions will be performed.
Using configuration parameter file: /u01/app/11.2.0/grid/crs/install/crsconfig_params
Creating trace directory
User ignored Prerequisites during installation
Installing Trace File Analyzer
OLR initialization - successful
root wallet
root wallet cert
root cert export
peer wallet
profile reader wallet
pa wallet
peer wallet keys
pa wallet keys
peer cert request
pa cert request
peer cert
pa cert
peer root cert TP
profile reader root cert TP
pa root cert TP
peer pa cert TP
pa peer cert TP
profile reader pa cert TP
profile reader peer cert TP
peer user cert
pa user cert
Adding Clusterware entries to inittab
ohasd failed to start
Failed to start the Clusterware. Last 20 lines of the alert log follow:
2015-05-23 23:37:45.460:
[client(13782)]CRS-2101:The OLR was formatted using version 3.
报错原因：
因为RHEL 7使用systemd而不是initd运行进程和重启进程，而root.sh通过传统的initd运行ohasd进程。
解决方法：
在RHEL 7中ohasd需要被设置为一个服务，在运行脚本root.sh之前。
步骤如下：
1. 以root用户创建服务文件
#touch /usr/lib/systemd/system/ohas.service
#chmod 777 /usr/lib/systemd/system/ohas.service
2. 将以下内容添加到新创建的ohas.service文件中
vi /usr/lib/systemd/system/ohas.service
[Unit]
Description=Oracle High Availability Services
After=syslog.target
[Service]
ExecStart=/etc/init.d/init.ohasd run >/dev/null 2>&1 Type=simple
Restart=always
[Install]
WantedBy=multi-user.target
3. 以root用户运行下面的命令
systemctl daemon-reload
systemctl enable ohas.service
systemctl start ohas.service
4. 查看运行状态
systemctl status ohas.service
如果还是报ohasd failed to start错误，可能是root.sh脚本创建了init.ohasd之后，ohas.service没有马上启动
，解决方法参考以下：
当运行root.sh时，一直刷新/etc/init.d ，直到出现 init.ohasd 文件，
马上手动启动ohas.service服务 命令：systemctl start ohas.service
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RHEL 7 安装oracle rac 11.2.0.4执行root.sh报错ohasd failed to start
