Configuration files

What is the LavinMQ configuration file?

Most settings in LavinMQ can be tuned using the configuration file. The structure of the configuration file is INI and comprises key-value pairs for properties and sections that organize the properties. The sections are split into four; one [main] section for general settings, one for the LavinMQ Management Interface [mgmt], one for amqp settings [amqp], one for MQTT settings [mqtt], one for clustering settings [clustering]. The syntax can be explained as:

One setting uses one line
Lines are structured Key = Value
Any line starting with the ; character indicates a comment

Where is the configuration file located?

The default configuration file location is /etc/lavinmq/lavinmq.ini

How do config changes take effect?

Changes to the configuration file will be applied after a restart of LavinMQ.

Configuration settings

The tables below outline the different settings available for LavinMQ by section, including their default values and examples.

[main]

consumer_timeout	Default consumer timeout for acks. Default: `consumer_timeout = nil (UInt64?)`
data_dir	The path of the data directory where all data is stored. Default: `data_dir = /var/lib/lavinmq (String)`
data_dir_lock	Use file lock in the data directory Default: `data_dir_lock = true`
default_consumer_prefetch	Default prefetch value for consumers if not set by consumer. Default: `default_consumer_prefetch = 65535`
default_password	Hashed password for default user. Use `lavinmqctl hash_password` or `/api/auth/hash_password` to generate password hash. Default: `default_password = +pHuxkR9fCyrrwXjOD4BP4XbzO3l8LJr8YkThMgJ0yVHFRE+`
default_user	Default user. Default: `default_user = guest`
free_disk_min	The minimum value of free disk space in bytes before LavinMQ starts to control flow. Default: `free_disk_min = 0`
free_disk_warn	The minimum value of free disk space in bytes before LavinMQ warns about low disk space. Default: `free_disk_warn = 0`
guest_only_loopback	Limit guest user to only connect from loopback address. Default: `guest_only_loopback = true`
log_exchange	Enable log exchange Default: `log_exchange = false`
log_file	Path to file log file. If no path is set, log is written to STDOUT. Default: `log_file = nil`
log_level	Controls how detailed the log should be. The level can be one of: none (nothing is logged) fatal (only fatal errors are logged) error (fatal and errors are logged) warn (fatal, errors and warnings are logged) info (fatal, errors, warnings, and info messages are logged) debug (all messages are logged). Default: `log_level = info`
max_deleted_definitions	Number of deleted queues, unbinds etc that compacts the definitions file. Default: `max_deleted_definitions = 8192`
segment_size	Size of segment files. Default: `segment_size = 8388608`
set_timestamp	Boolean value for setting the timestamp property. Default: `set_timestamp = false`
socket_buffer_size	Socket buffer size in bytes. Default: `socket_buffer_size = 16384`
stats_interval	Statistics collection interval in milliseconds. Default: `stats_interval = 5000`
stats_log_size	Number of entries in the statistics log file before oldest entry removed. Default: `stats_log_size = 120`
tcp_keepalive	tcp_keepalive settings as a tuple, {idle, interval, probes/count}. Default: `tcp_keepalive = {60, 10, 3}`
tcp_nodelay	Boolean value for disabling Nagle's algorithm, and sending the data as soon as it's available. Default: `tcp_nodelay = false`
tcp_recv_buffer_size	TCP receive buffer size. Default: `tcp_recv_buffer_size = nil`
tcp_send_buffer_size	TCP send buffer size. Default: `tcp_send_buffer_size = nil`
tls_cert	TLS certificate (including chain). Default: `tls_cert = nil` Example: `tls_cert = /etc/lavinmq/cert.pem`
tls_key	Private key for the TLS certificate. Default: `tls_key = nil` Example: `ls_key = /etc/lavinmq/key.pem`
tls_ciphers	List of TLS ciphers to allow Example: `tls_ciphers = nil`
tls_min_version	Minimum allowed TLS version. Allowed options: 1.0 1.1 1.2 1.3 Default: `tls_min_version = 1.2`

[mgmt]

bind	IP address that the HTTP server will listen on. Default: `bind = 127.0.0.1`
port	Port used for connections. Default: `port = 15672`
tls_port	Port used for TLS connections. Default: `tls_port = -1 (disabled)`
unix_path	UNIX path to listen to Default: `unix_path = /tmp/lavinmq-http.sock`

[amqp]

bind	IP address that both the AMQP and HTTP servers will listen on. Default: `bind = 127.0.0.1`
channel_max	Maximum number of channels to negotiate with clients. Setting to 0 means an unlimited number of channels. Default: `channel_max = 2048`
frame_max	Maximum frame size in bytes. Default: `frame_max = 1048576`
heartbeat	Timeout value in seconds suggested by the server during connection negotiation. If set to 0 on both server and client, heartbeats are disabled. Default: `Heartbeat = 0`
max_message_size	The maximum message size in bytes. Default: `max_message_size = 128 * 1024**2`
port	Port used for AMQP connections Default: `port = 5672`
systemd_socket_name	Default: `systemd_socket_name = lavinmq-amqp.socket`
tcp_proxy_protocol	Boolean value for PROXY protocol on amqp tcp connections Default: `tcp_proxy_protocol = false`
tls_port	Port used for TLS (AMQPS) connections Default: `tls_port = -1 (disabled)`
unix_path	UNIX path to listen to Default: `unix_path = /tmp/lavinmq.sock`
unix_proxy_protocol	Boolean value for PROXY protocol on unix domain socket connections Default: `unix_proxy_protocol = true`

[MQTT]

bind	IP address that AMQP, MQTT, and HTTP servers will listen on. Default: `bind = 127.0.0.1`
port	Port for non-TLS MQTT connections. Default: `port = 1883`
tls_port	Port for TLS-enabled MQTT connections Default: `tls-port = -1 (disabled)`
mqtt_unix_path	UNIX path to listen to Default: `unix_path = /tmp/lavinmq-mqtt.sock`
max_inflight_messages	Maximum number of messages in flight simultaneously. Default: `65535`

[clustering]

advertised_uri	Advertised URI for the clustering server. Default: `advertised_uri = nil`
bind	Listen for clustering followers on this address. Default: `bind = 127.0.0.1`
enabled	Enable clustering. Default: `enabled = false`
etcd_endpoints	Comma separated host:port pairs Default: `etcd_endpoints = localhost:2379`
etcd_prefix	Key prefix used in etcd. Default: `etcd_prefix = lavinmq`
max_unsynced_actions	Maximum number of unsynced actions. Default: `max_unsynced_actions = 8192`
port	Listen for clustering followers on this port. Default: `port = 5679`

Example configuration file

An example configuration file can be found in the LavinMQ repo on GitHub.

[main]
data_dir = /var/lib/lavinmq
guest_only_loopback = true
log_level = info

[mgmt]
bind = 0.0.0.0
port = 15672
tls_port = 15671
unix_path = /tmp/lavinmq-http.sock

[amqp]
bind = 0.0.0.0
port = 5672
tcp_proxy_protocol = false
tls_port = 5671
unix_path = /tmp/lavinmq.sock
unix_proxy_protocol = true

Introduction

Configuration

Language Support

AMQP 0-9-1 Overview

More Exchange Types

More Consumer Features

Queue Deep-dive

Other Features

Reliable Message Delivery

High Availability

Monitoring

Management HTTP API

Tutorials

Networking

LavinMQ CLI