(Replication mode)
Switching Main and Secondary Primary Servers
In the unforeseen event where the main-primary server goes down the second-primary will take over, become the primary server and ensure that the system still runs. Once we recover the main-primary server we can then restart all the services on the main-primary server, to do that run the following command.
Run as root user
systemctl restart nmis9d opchartsd opeventsd omkd ophad
To switch from the Secondary Primary back to the Main-Primary so the main-primary is the master again follow these steps:
Connect to MongoDB on the master server (second-primary):
mongosh --username opUserRW --password op42flow42 admin
Update member priorities:
cfg = rs.conf() cfg.members[0].priority = 0.6 cfg.members[1].priority = 0.5 rs.reconfig(cfg)