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Managing VerneMQ Plugins


Many aspects of VerneMQ can be extended using plugins. The standard VerneMQ package comes with several official plugins. You can show the enabled & running plugins via:

vmq-admin plugin show

The command above displays all the enabled plugins together with the hooks they implement:

|  Plugin   |   Type    |     Hook(s)     |            M:F/A            |
|vmq_passwd |application|auth_on_register |vmq_passwd:auth_on_register/5|
|  vmq_acl  |application| auth_on_publish |  vmq_acl:auth_on_publish/6  |
|           |           |auth_on_subscribe| vmq_acl:auth_on_subscribe/3 |

Enable a plugin

vmq-admin plugin enable --name=vmq_acl

This enables the ACL plugin. Because the vmq_acl plugin is already started the above command won't succeed. In case the plugin sits in an external directory you must also to provide the --path=PathToPlugin.

Disable a plugin

vmq-admin plugin disable --name=vmq_acl

Persisting plugins

To make a plugin start when VerneMQ starts they need to be configured in the main vernemq.conf file.

The general syntax to enable a plugin is to add a line like plugins.pluginname = on, using the vmq_passwd plugin as an example:

plugins.vmq_passwd = on

And if the plugin is external the path can be specified like this:

plugins.myplugin = on
plugins.myplugin.path = /path/to/plugin

Plugin specific settings can be configured via myplugin.somesetting = value, like:

vmq_passwd.password_file = ./etc/vmq.passwd

See the vernemq.conf file for details.