HiveMQ CE is a Java-based open source MQTT broker that fully supports MQTT 3.x and MQTT 5.
To create a new Proxmox VE HiveMQ CE LXC, run the command below in the Proxmox VE Shell.
bash -c "$(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/ct/hivemq.sh)"
Default Settings: 1GB RAM - 4GB Storage - 1vCPU
To check if HiveMQ is listening to the default port for MQTT
lsof -i :1883