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

2. Add NATS Server Configuration: Ensure the following configuration is included in opCommon.json on all servers. In the below example we have added the main-primary in the nats_server string int the “database“ json object

   Code Block
   language json
   "nats_server": "opha-dev1.opmantek.net:4222"

4. Server-Specific Configuration

4.2 Update License

Currently there are 2 available licenses and messagebus will not run without a license.

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

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

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5. MongoDB Setup (Main-Primary Only)

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Run the following command

rs.initiate({})

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4.2

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Run the following command to set the default write concern:

db.adminCommand({ "setDefaultRWConcern": 1, "defaultWriteConcern": { "w": 1 } })

5.3 Add Arbiter

Run the following command to add an arbiter to the replica set:

rs.addArb("opha-dev2.opmantek.net:27018")

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Update License

Currently there are 2 available licenses and messagebus will not run without a license.

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

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

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5.2 Restart mongod on the Main-Primary and Second-Primary

Run the following command on the Main-Primary, Secondary Primary, and Arbiter servers ONLY:

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Start the NATS service on the Main-Primary, Secondary Primary, and Arbiter servers server ONLY:

systemctl start nats-server

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1. Accept EULAs: Make sure when you login to each server to confirm that all End User License Agreements (EULAs) are accepted.

8. Switching Main and Secondary Primary Servers

To switch from Main-Primary to Secondary Primary, follow these steps:

1. Connect to MongoDB:

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

2. Update member priorities:

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

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