VerneMQ collector

VerneMQ is a scalable and open source MQTT broker that connects IoT, M2M, Mobile, and web applications.

This module will monitor one or more VerneMQ instances, depending on your configuration.

vernemq module is tested on the following versions:

• v1.10.1

Metrics

All metrics have "vernemq." prefix.

Metric	Scope	Dimensions	Units
sockets	global	open, close	events/s
client_keepalive_expired	global	closed	sockets/s
socket_close_timeout	global	closed	sockets/s
socket_errors	global	errors	errors/s
queue_processes	global	queue_processes	queue processes
queue_processes_operations	global	setup, teardown	events/s
queue_process_init_from_storage	global	queue_processes	queue processes/s
queue_messages	global	received, sent	messages/s
queue_undelivered_messages	global	dropped, expired, unhandled	messages/s
router_subscriptions	global	subscriptions	subscriptions
router_matched_subscriptions	global	local, remote	subscriptions/s
router_memory	global	used	KiB
average_scheduler_utilization	global	utilization	percentage
system_utilization_scheduler	global	a dimension per scheduler	percentage
system_processes	global	processes	processes
system_reductions	global	reductions	ops/s
system_context_switches	global	context_switches	ops/s
system_io	global	received, sent	kilobits/s
system_run_queue	global	ready	processes
system_gc_count	global	gc	ops/s
system_gc_words_reclaimed	global	words_reclaimed	ops/s
system_allocated_memory	global	processes, system	KiB
bandwidth	global	received, sent	kilobits/s
retain_messages	global	messages	messages
retain_memory	global	used	KiB
cluster_bandwidth	global	received, sent	kilobits/s
cluster_dropped	global	dropped	kilobits/s
netsplit_unresolved	global	unresolved	netsplits
netsplits	global	resolved, detected	netsplits/s
mqtt_auth	global	received, sent	packets/s
mqtt_auth_received_reason	global	a dimensions per reason	packets/s
mqtt_auth_sent_reason	global	a dimensions per reason	packets/s
mqtt_connect	global	connect, connack	packets/s
mqtt_connack_sent_reason	global	a dimensions per reason	packets/s
mqtt_disconnect	global	received, sent	packets/s
mqtt_disconnect_received_reason	global	a dimensions per reason	packets/s
mqtt_disconnect_sent_reason	global	a dimensions per reason	packets/s
mqtt_subscribe	global	subscribe, suback	packets/s
mqtt_subscribe_error	global	failed	ops/s
mqtt_subscribe_auth_error	global	unauth	attempts/s
mqtt_unsubscribe	global	unsubscribe, unsuback	packets/s
mqtt_unsubscribe	global	mqtt_unsubscribe_error	ops/s
mqtt_publish	global	received, sent	packets/s
mqtt_publish_errors	global	failed	ops/s
mqtt_publish_auth_errors	global	unauth	attempts/s
mqtt_puback	global	received, sent	packets/s
mqtt_puback_received_reason	global	a dimensions per reason	packets/s
mqtt_puback_sent_reason	global	a dimensions per reason	packets/s
mqtt_puback_invalid_error	global	unexpected	messages/s
mqtt_pubrec	global	received, sent	packets/s
mqtt_pubrec_received_reason	global	a dimensions per reason	packets/s
mqtt_pubrec_sent_reason	global	a dimensions per reason	packets/s
mqtt_pubrec_invalid_error	global	unexpected	messages/s
mqtt_pubrel	global	received, sent	packets/s
mqtt_pubrel_received_reason	global	a dimensions per reason	packets/s
mqtt_pubrel_sent_reason	global	a dimensions per reason	packets/s
mqtt_pubcom	global	received, sent	packets/s
mqtt_pubcomp_received_reason	global	a dimensions per reason	packets/s
mqtt_pubcomp_sent_reason	global	a dimensions per reason	packets/s
mqtt_pubcomp_invalid_error	global	unexpected	messages/s
mqtt_ping	global	pingreq, pingresp	packets/s
node_uptime	global	pingreq, pingresp	packets/s

Configuration

Edit the go.d/vernemq.conf configuration file using edit-config from the Netdata config directory, which is typically at /etc/netdata.

cd /etc/netdata # Replace this path with your Netdata config directory
sudo ./edit-config go.d/vernemq.conf

Needs only url to server's /metrics endpoint. Here is an example for 2 servers:

jobs:
  - name: local
    url: http://127.0.0.1:8888/metrics

  - name: remote
    url: http://203.0.113.10:8888/metrics

For all available options please see module configuration file.

Troubleshooting

To troubleshoot issues with the vernemq collector, run the go.d.plugin with the debug option enabled. The output should give you clues as to why the collector isn't working.

• Navigate to the plugins.d directory, usually at /usr/libexec/netdata/plugins.d/. If that's not the case on your system, open netdata.conf and look for the plugins setting under [directories].

  cd /usr/libexec/netdata/plugins.d/

• Switch to the netdata user.

  sudo -u netdata -s

• Run the go.d.plugin to debug the collector:

  ./go.d.plugin -d -m vernemq