RAC How to apply database patch on both nodes

 Ceck Oracle service status

[root@rac1pub108 Patch]# crs_stat -t

2: Stop database instance one by one

Stop database instance one by one

[oracle@rac-node1 ~]$ srvctl stop instance -i prod1 -d prod

[oracle@rac-node1 ~]$ srvctl stop instance -i prod2 -d prod

3: Stop ASM instance on each node one by one

[oracle@rac-node1 ~]$ srvctl stop asm -n rac-node1

[oracle@rac-node1 ~]$ srvctl stop asm -n rac-node2

4: Stop nodapplications one by one on each node

[oracle@rac-node1 ~]$ srvctl stop nodeapps -n rac-node1

[oracle@rac-node1 ~]$ srvctl stop nodeapps -n rac-node2

5: Check status again

[oracle@rac-node1 ~]$ crs_stat -t

[oracle@rac1pub108 17811429]$ opatch apply -all_nodes