Zlogd

Logging server for external apps that communicates over unix sock files.

Install

For Typical Usage

npm install -g zlogd
cp /path/to/your/usr/local/bin/zlogd/transports.json-dist /path/to/your/usr/local/bin/zlogd/transports.json

For Local Development

npm install zlogd
cp transports.json-dist transports.json

Configuring

You can configure the transports to ship the logs.

Currently supported transports:

• file (see winston file configuration)

{
	"type": "file",
	"config": {
		"filename": "/tmp/out.log" 
	}
}

• logstash (see winston-logstash)

{
	"type": "logstash",
	"config": {
		"host": "127.0.0.1",
		"port": 28777
	}
}

Running

Environment Switches

Several process variables can be set to alter the runtime of Zlogd:

• SOCK_FILE - Path of the unix socket file (default: /tmp/zlogd.sock)
• WORKERS - Number of workers to use (default: System number of CPUs)
• STAT_MONITOR - Should the stat monitor run? (default: 0)
• STAT_PULSE - How often will the stats aggregate/display? (default: 3000 milliseconds)
• DELIMITER - What is the delimiter that separates log messages? (default: ;;)

Command Line Switches

As of 0.2.x, CLI commands are available that can be used in place of environment variables:

• -h, --help - output usage information
• -V, --version - output the version number
• -f, --forground - Run zlogd in the forground.
• -w, --workers [number] - Run zlogd with set number of workers. Defaulting to number of CPUs.
• -i, --input-socketfile [path] - Path (/tmp/zlog.sock) to sock file for zlogd to listen.
• -d, --delimiter [delimiter] - The delimiter symbol (;;) to indicate to zlogd separate messages per request.
• -s, --stat-monitor - Run zlogd with a statmonitor.
• -p, --stat-pulse [milliseconds] - Stat monitor pulses at this rate (3000).

Local:

npm start

global:

zlogd

As of version 0.2.0, running this process will default to running as a daemon. You can view the processes in linux/mac by doing ps -A | grep -i zlogd.

Send a Log Message

Here is an example PHP script sending a log message to zlogd:

<?php

$socket = fsockopen('unix:///tmp/zlog.sock', 0);
$delimiter = ';;';
$packet = json_encode(array(
        'level' => 'debug',
        'message' => 'hello world!'
)) . $delimiter;
fputs($socket, $packet, strlen($packet));

Todo

• Add upstart script for managing processes.
• Prevent duplicate runs (possibly generate a lock file and delete on exit).
• Add formal documentation to a /docs directory.