Database CPU Patching in 2 Node Oracle RAC (Cluster environment)

opatch prereq CheckConflictAgainstOHWithDetail -ph ./

Node 1(Instance1):
==================
srvctl stop instance -i uat1 -d uat
lsnrctl stop uat1

cd /home/dbuat/CPU_PATCH_APR2018/27338049
opatch apply

Sqlplus / as sysdba
startup
@catbundle.sql psu apply
shut immediate

srvctl start instance -i uat1 -d uat

Node 2 (Instance2):
==================
srvctl stop instance -i uat2 -d uat
lsnrctl stop uat2

cd /home/dbuat/CPU_PATCH_APR2018/27338049
opatch apply

srvctl start instance -i uat2 -d uat