Domino Nexus only allows control planes and data planes to be out of sync by patch version. For instance, 5.5.0 and 5.5.1 are compatible, but 5.5.0 and 5.6.0 are not.
If your control plane has been upgraded, but the data planes have not, they are marked as degraded in the Admin UI, and new executions are not permitted.
Data plane upgrades can be performed using two methods: manual upgrade, applicable to versions 5.10 and below, or UI-based upgrade, available from version 5.11 onwards. The manual method remains an option for later versions as well.
The manual method uses Helm to give upgrade commands:
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Generate a new Helm install command using the details of the existing data plane.
The new command will use the new chart version.
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Apply any custom values: Incorporate any custom values as needed.
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Re-run the install: Execute the Helm command to upgrade the data plane agent and other Domino platform services.
For detailed steps, follow the existing upgrade instructions.