在oracle linux 7.3上安装11.2.0.4单实例，GI执行root.sh失败。
ALERT LOG
--------------
Filename=roothas.log
>End Command output
2018-01-16 08:56:18: itab entries=cssd|evmd|crsd|ohasd
2018-01-16 08:56:18: Executing /sbin/init q
2018-01-16 08:56:18: Executing cmd: /sbin/init q
2018-01-16 08:56:23: Created backup /etc/inittab.no_crs
2018-01-16 08:56:23: Appending to /etc/inittab.tmp:
2018-01-16 08:56:23: h1:35:respawn:/etc/init.d/init.ohasd run >/dev/null 2>&1 </dev/null
2018-01-16 08:56:23: Done updating /etc/inittab.tmp
2018-01-16 08:56:23: Saved /etc/inittab.crs
2018-01-16 08:56:23: Installed new /etc/inittab
2018-01-16 08:56:23: Executing /sbin/init q
2018-01-16 08:56:23: Executing cmd: /sbin/init q
2018-01-16 08:56:24: Executing cmd: /u01/app/11.2.0.4/grid/bin/crsctl start has
2018-01-16 08:58:24: Command output:
> CRS-4124: Oracle High Availability Services startup failed.
> CRS-4000: Command Start failed, or completed with errors.
>End Command output
2018-01-16 08:58:24: Executing /etc/init.d/ohasd install
2018-01-16 08:58:24: Executing cmd: /etc/init.d/ohasd install
2018-01-16 08:58:24: ohasd failed to start
2018-01-16 08:58:24: ohasd failed to start
2018-01-16 08:58:24: Alert log is /u01/app/11.2.0.4/grid/log/lxtepoods1/alertlxtepoods1.log
2018-01-16 08:58:24: Failed to start service 'ohasd'
2018-01-16 08:58:24: ###### Begin DIE Stack Trace ######
2018-01-16 08:58:24: Package File Line Calling
2018-01-16 08:58:24: --------------- -------------------- ---- ----------
2018-01-16 08:58:24: 1: main roothas.pl 217 crsconfig_lib::dietrap
2018-01-16 08:58:24: 2: main roothas.pl 377 main::__ANON__
根据日志可以看到在启动ohasd 时，它使用的是initd 脚本，根据文档 Install of Clusterware fails while running root.sh on OL7 - ohasd fails to start ( Doc ID 1959008.1 )， OL7 开始使用了systemd，所以需要打patch 18370031来解决这个问题。
参考文档How to Proceed from Failed 11gR2 Grid Infrastructure (CRS) Installation ( Doc ID 942166.1 )， 先deconfig 然后打patch， 再运行root.sh的方法