Challenge
The HiveMQ operator (since 0.9.0) as well as the HiveMQ Docker images (since 4.6.4) introduced some breaking changes. The. following manual shows how to execute a zero downtime rolling upgrade from older operator and HiveMQ versions.
Prerequisites:
k8s version 1.16+ is installed
Helm version 3 is installed
Hivemq k8s operator repo is already added
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