Shulou(Shulou.com)06/02 Report--

Download address of the installation package:

Http://emqtt.com/downloads

Here we download emqttd-centos6.8-v2.1.2.zip

Configure two host hosts

192.168.0.10 s1.emqtt.io192.168.0.20 s2.emqtt.io

Installation configuration (s1.emqtt.io):

Install dependency package # yum install-y lksctp-tools install # unzip emqttd-centos6.8-v2.1.2.zip # cd emqttd#vi etc/emq.confnode.name = emqttd@s1.emqtt.io or node.name = emqttd@192.168.0.10

In the same way, configure s2.emqtt.io to start two nodes respectively

Start # bin/emqttd startemqttd 2.1.2 is started fully fulfilled EMQ message server process status query: #. / bin/emqttd_ctl statusNode 'emqttd@s1.emqtt.io' is startedemqttd 2.1.2 is running

Join the cluster

Execute on emqttd@s2.emqtt.io:

# bin/emqttd_ctl cluster join emqttd@s1.emqtt.ioJoin the cluster successfully.Cluster status: [{running_nodes, ['emqttd@s1.emqtt.io','emqttd@s2.emqqt.io']}]

Or execute on emqttd@s1.emqtt.io:

# bin/emqttd_ctl cluster join emqttd@s2.emqtt.ioJoin the cluster successfully.Cluster status: [{running_nodes, ['emqttd@s1.emqtt.io','emqttd@s2.emqtt.io']}]

Query the cluster status on any node:

# bin/emqttd_ctl cluster statusCluster status: [{running_nodes, ['emqttd@s1.emqtt.io','emqttd@s2.emqtt.io']}] node exits the cluster

Nodes exit the cluster in two ways:

Leave: this node exits the cluster

Remove: remove other nodes from the cluster

Emqttd@s2.emqtt.io actively exits the cluster:

# bin/emqttd_ctl cluster leaveLeave the cluster successfully.Cluster status: [{running_nodes, ['emqttd@s2.emqqt.io']}]

Or emqttd@s1.emqtt.io node, delete the emqttd@s2.emqtt.io node from the cluster:

# bin/emqttd_ctl cluster remove emqttd@s2.emqtt.io Firewall Settings

If there is a firewall between the cluster nodes, the firewall needs to open port 4369 and a TCP port segment. 4369 is used by the epmd port mapping service, and the TCP port segment is used to establish connections and communications between nodes.

After the firewall is set, EMQ needs to configure the same port segment, emqttd/etc/emq.conf file:

# # Distributed node port rangenode.dist_listen_min = 6000node.dist_listen_max = 6999 Note: NetSplit

The EMQ message server cluster needs a stable network connection to avoid NetSplit failures. NetSplit is not automatically processed by default in cluster design. If NetSplit occurs between cluster nodes, you need to restart the relevant nodes on a shard manually.

EMQTTD cluster verification

Cluster verification We use Mosquitto to verify "centos yum install Mosquitto"

10 message, 20 subscription 10 write message # mosquitto_pub-t topicTest07-m Message05-h 192.168.0.10-p 188320 subscription View # mosquitto_sub-v-t topicTest07-h 192.168.0.20-p 1883topicTest07 Message05 20 message, 10 subscription 20 write message # mosquitto_pub-t topicTest08-m Message06-h 192.168.0.20-p 188310 subscription View # mosquitto_sub-v-t topicTest08-h 192.168.0.10-p 1883topicTest08 Message06

EMQTTD condition monitoring

Condition monitoring can be carried out through self-contained WEB

Http://192.168.0.10:8083/status

And through the console:

Http://192.168.0.10:18083

Default account and password: admin/public

The console is full of information. Find out for yourself.

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