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(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

Code Block
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:

  1. Connect to MongoDB on the master server (second-primary):

    Code Block
    mongosh --username opUserRW --password op42flow42 admin

  2. Update member priorities:

    Code Block
    cfg = rs.conf()
cfg.members[0].priority = 0.6
cfg.members[1].priority = 0.5
rs.reconfig(cfg)