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What's%20up%20good%20people%20%3F%20Hope%20well.%0A%0AOk%2C%20Few%20days%20back%20was%20trying%20to%20setup%20MQTT%20cluster%20server%20and%20choose%20HAProxy%20to%20use%20as%20load%20balancer.%0A%0AThis%20is%20a%20short%20guide%20how%20I%20managed%20everything.%0A%0AI%20have%203%20server%20from%20digital%20ocean%20(vps%20service%20provider).%0A%0AAssume%20they%20are%20%3A%0A%0A1.%20lb.example.com%20(192.168.0.101)%0A2.%20node1.example.com%20(192.168.0.102)%0A3.%20node2.example.com%20(192.168.0.103)%0A%0Alb.example.com%20is%20load%20balancer%20where%20I%20setup%20HAProxy.%0A%0Anode1.example.com%20is%20first%20server%20of%20mqtt%20and%0A%0Anode2.example.com%20is%20second%20server%20of%20mqtt.%0A%0AI%20used%20emqttd%20as%20MQTT%20broker.%20%5BDownload%20link%5D(http%3A%2F%2Femqtt.io%2Fdownloads)%0A%0AAfter%20emqttd%20setup%20on%20node1%20and%20node2%20to%20enable%20clustering%20enter%20into%20node1.example.com%20change%20hostname%20to%0A%0A**node1.example.com**%0A%0Achange%20in%20**etc%2Femq.conf**%20as%20%3A%0A%0A%60%60%60bash%0Anode.name%20%3D%20emqttd%40node1.example.com%0A%60%60%60%0A%0ADo%20same%20for%20node2%20but%20here%20with%20node2.example.com%0A%0ANow%20from%20node1%20or%20node2%20execute%0A%0A%60%60%60bash%0Aemqttd_ctl%20cluster%20join%20emqttd%40node2.example.com%0A%23%20Assuming%20you%20are%20on%20node1%0A%60%60%60%0A%0Anow%20to%20check%20cluster%20status%20execute%2C%0A%0A%60%60%60bash%0Aemqttd_ctl%20cluster%20status%0A%60%60%60%0A%0AResult%20should%20be%2C%0A%0A%60%60%60bash%0A%5B%7Brunning_nodes%2C%5B'emqttd%40node1.example.com'%2C'emqttd%40node2.example.com'%5D%7D%5D%0A%60%60%60%0A%0ANow%20time%20to%20setup%20HAProxy%20for%20load%20balancing%2C%0A%0AEnter%20into%20**lb.example.com**%20and%0A%0AInstall%2C%0A%0A%60%60%60bash%0Asudo%20apt-get%20install%20haproxy%0A%60%60%60%0A%0ATo%20enable%20HAProxy%20change%20in%20**%2Fetc%2Fdefault%2Fhaproxy**%20to%0A%0A%60%60%60bash%0AENABLED%3D1%0A%60%60%60%0A%0AThen%2C%0A%0Achange%20in%20**%2Fetc%2Fhaproxy%2Fhaproxy.cfg**%0A%0A%60%60%60bash%0Adefaults%0Alog%20%20%20%20%20global%0Amode%20%20%20%20tcp%0Aoption%20%20tcplog%0A%60%60%60%0A%0AAnd%20add%0A%0A%60%60%60bash%0Afrontend%20mqtt%0A%20%20%20%20bind%200.0.0.0%3A1883%0A%20%20%20%20default_backend%20mqtt%0A%0Abackend%20mqtt%0A%20%20%20%20mode%20tcp%0A%20%20%20%20balance%20roundrobin%0A%20%20%20%20server%20node1%20node1.example.com%3A1883%20check%0A%20%20%20%20server%20node2%20node2.example.com%3A1883%20check%0A%0Afrontend%20mqtt_dashboard%0A%20%20%20%20bind%200.0.0.0%3A18083%0A%20%20%20%20default_backend%20mqtt_dashboard%0A%0Abackend%20mqtt_dashboard%0A%20%20%20%20mode%20http%0A%20%20%20%20balance%20roundrobin%0A%20%20%20%20server%20node1%20node1.example.com%3A18083%20check%0A%20%20%20%20server%20node2%20node2.example.com%3A18083%20check%0A%60%60%60%0A%0AAnd%20you%20are%20done.%0A%0ANow%20browse%20%5Bhttp%3A%2F%2Flb.example.com%3A18083%5D(http%3A%2F%2Flb.example.com%3A18083)%0A%0AMqtt%20URL%20%3A%20**tcp%3A%2F%2Flb.example.com%3A1883**%0A%0Ayou%20will%20see%20server%20are%20swapping.%0A%0AEmqttd%20dashboard%20default%0A%0A**user%20%3A%20admin%2C**%0A%0A**pass%20%3A%20public**

How to : Setup MQTT cluster with HAProxy

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