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1. Backup Configuration: Make a backup copy of the opCommon.json file before making any changes.

2. Add NATS Cluster Configuration: Ensure the following configuration is included in opCommon.json on all servers. In the below example we have added the Main Primary, arbiter and Secondary Primary FQDNs and port/s to be utilized in the nats_server cluster attribute, you can find this in the database section.

   Code Block
   language json
   "nats_cluster": [ "opha-dev1.opmantek.net:4222", "opha-dev2.opmantek.net:4222", "opha-dev6.opmantek.net:4222" ]

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1. opHA-MB for NMIS & opCharts (This license is required for Message Bus to run)

   1. NMIS and opCharts data are synced from all poller/mirrors to the Main Primary using Message Bus. In replication mode, if the Main Primary were to go down the Secondary Primary will retain the NMIS and opCharts data.

      

2. opHA-MB for opEvents (This license is an add-on for opEvents).

   1. With this add-on opEvents will use MessageBus to sync opEvents data from each poller/mirror to the Main Primary and in replication mode opEvents data is synced to the Secondary Primary. In replication mode, If the Main Primary were to go down the Secondary Primary will retain the opEvents data.

      

3. You need to add your license to the opLicensing app as below on the main-primary and second-primary servers

   Image Added

6. MongoDB Setup (Main Primary Only)

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mongosh --username opUserRW --password op42flow42 admin

Run the following commandAdd the main-primary and secondary-primary to the below command and run it

rs.initiate({ _id: "rs1", version: 1, members: [ { _id: 0, host : "opha-dev1.opmantek.net:27017" }, { _id: 1, host : "opha-dev6.opmantek.net:27017" } ] })

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