supermq/tools/mqtt-bench/README.md

MQTT Benchmarking Tool

A simple MQTT benchmarking tool for SuperMQ platform.

It connects SuperMQ clients as subscribers over a number of channels and uses other SuperMQ clients to publish messages and create MQTT load.

SuperMQ clients used must be pre-provisioned first, and SuperMQ provision tool can be used for this purpose.

Installation

cd tools/mqtt-bench
make

Usage

The tool supports multiple concurrent clients, publishers and subscribers configurable message size, etc:

./mqtt-bench --help
Tool for extensive load and benchmarking of MQTT brokers used within SuperMQ platform.
Complete documentation is available at https://docs.supermq.absmach.eu

Usage:
  mqtt-bench [flags]

Flags:
  -b, --broker string     address for mqtt broker, for secure use tcps and 8883 (default "tcp://localhost:1883")
      --ca string         CA file (default "ca.crt")
  -c, --config string     config file for mqtt-bench (default "config.toml")
  -n, --count int         Number of messages sent per publisher (default 100)
  -f, --format string     Output format: text|json (default "text")
  -h, --help              help for mqtt-bench
  -m, --supermq string   config file for SuperMQ connections (default "connections.toml")
      --mtls              Use mtls for connection
  -p, --pubs int          Number of publishers (default 10)
  -q, --qos int           QoS for published messages, values 0 1 2
      --quiet             Suppress messages
  -r, --retain            Retain mqtt messages
  -z, --size int          Size of message payload bytes (default 100)
  -t, --skipTLSVer        Skip tls verification
  -t, --timeout           Timeout mqtt messages (default 10000)

Two output formats supported: human-readable plain text and JSON.

Before use you need a mgconn.toml - a TOML file that describes SuperMQ connection data (channels, clientIDs, clientKeys, certs). You can use provision tool (in tools/provision) to create this TOML config file.

go run tools/mqtt-bench/cmd/main.go -u test@supermq.com -p test1234 --host http://127.0.0.1 --num 100 > tools/mqtt-bench/mgconn.toml

Example use and output

Without mtls:

go run tools/mqtt-bench/cmd/main.go --broker tcp://localhost:1883 --count 100 --size 100 --qos 0 --format text --pubs 10 --supermq tools/mqtt-bench/mgconn.toml

With mtls go run tools/mqtt-bench/cmd/main.go --broker tcps://localhost:8883 --count 100 --size 100 --qos 0 --format text --pubs 10 --supermq tools/mqtt-bench/mgconn.toml --mtls -ca docker/ssl/certs/ca.crt

You can use `config.toml` to create tests with this tool:

go run tools/mqtt-bench/cmd/main.go --config tools/mqtt-bench/config.toml

Example of `config.toml`:

[mqtt] [mqtt.broker] url = "tcp://localhost:1883"

[mqtt.message] size = 100 format = "text" qos = 2 retain = true

[mqtt.tls] mtls = false skiptlsver = true ca = "ca.crt"

[test] pubs = 3 count = 100

[log] quiet = false

[supermq] connections_file = "smqconn.toml"

Based on this, a test scenario is provided in `templates/reference.toml` file.