CRS-0184: Cannot communicate with the CRS daemon.之节点脱离集群问题解决
1、系统环境：
OEL6.5企业版
Oracle11.2.0.2 RAC + ASM
2、报错信息：
$ crs_stat -t
CRS-0184: Cannot communicate with the CRS daemon.
$ crsctl check has
CRS-4639: Could not contact Oracle High Availability Services
3、报错原因查找：
在节点1节点查看IP地址，，VIP已经不存在
$ ifconfig -a
en0: flags=1e080863,480
inet 192.168.0.117 netmask 0xffffff00 broadcast 192.168.0.255
tcp_sendspace 262144 tcp_recvspace 262144 rfc1323 1
en1: flags=1e080863,480
inet 10.10.10.1 netmask 0xff000000 broadcast 10.255.255.255
tcp_sendspace 65536 tcp_recvspace 65536 rfc1323 1
在节点2上运行“crs_stat -t”发现，节点1好像已经退出集群环境
# su - grid
$ crs_stat -t
Name Type Target State Host
------------------------------------------------------------
ora.DATA.dg ora....up.type ONLINE ONLINE node2
ora....ER.lsnr ora....er.type ONLINE ONLINE node2
ora....N1.lsnr ora....er.type ONLINE OFFLINE
ora.OCR.dg ora....up.type ONLINE ONLINE node2
ora.asm ora.asm.type ONLINE ONLINE node2
ora.cvu ora.cvu.type ONLINE OFFLINE
ora.gsd ora.gsd.type OFFLINE OFFLINE
ora....network ora....rk.type ONLINE ONLINE node2
ora.node1.vip ora....t1.type ONLINE OFFLINE
ora....SM2.asm application ONLINE ONLINE node2
ora....E2.lsnr 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 ONLINE OFFLINE
ora.ons ora.ons.type ONLINE ONLINE node2
ora.prod.db ora....se.type ONLINE ONLINE node2
ora....ry.acfs ora....fs.type ONLINE ONLINE node2
ora.scan1.vip ora....ip.type ONLINE OFFLINE
从输出中看到节点1的VIP已经飘逸到节点2，从而判断节点1已经脱离集群。
通过"ifconfig"查看节点2上的ip信息。
4、问题解决：
清理节点1的配置信息，打算重新运行root.sh
# /u01/app/11.2.0/grid/crs/install/rootcrs.pl -verbose -deconfig -force
Using configuration parameter file: /u01/app/11.2.0/grid/crs/install/crsconfig_params
PRCR-1119 : Failed to look up CRS resources of ora.cluster_vip_net1.type type
PRCR-1068 : Failed to query resources
Cannot communicate with crsd
PRCR-1070 : Failed to check if resource ora.gsd is registered
Cannot communicate with crsd
PRCR-1070 : Failed to check if resource ora.ons is registered
Cannot communicate with crsd
