node-syslog
Syslog-ng TCP client for node, with basic fault-tolerance.
installation
$ npm install syslog
synopsis
var syslog = require('syslog');
var logger = syslog.createClient(514, 'localhost');
logger.info("ping!");
log levels
In increasing order of severity:
- debug
- info
- notice
- warning
- error
- crit
- alert
- emerg
These are available as methods on Client, ex: logger.crit().
You may also call the log method, and pass the level as the 2nd argument:
logger.log('fnord!', syslog.LOG_CRIT);
The default level is info.
configuration
You will have to configure your syslog server to accept TCP connections.
This is usually done in /etc/syslog-ng.conf. Let's say you have an app called fnord,
the configuration would look something like this:
source tcp_s {
tcp(ip(0.0.0.0) port(514) max-connections(256));
};
destination fnord_d {
file("/var/log/fnord.log");
};
log { source(tcp_s); destination(fnord_d); };
If you have multiple apps which need to log via TCP, you can specify filters, as such:
filter fnord_f { program("fnord"); };
Then modify the log statement to read:
log { source(tcp_s); filter(fnord_f); destination(fnord_d); };
Now if you have another app, called bnord, create similar destination and filter configurations for it,
and specify a new log statement, with the same source:
log { source(tcp_s); filter(bnord_f); destination(bnord_d); };
For this to work, you have to make sure you set the process.title variable in your node app.
process.title = 'fnord';
Alternatively, you can pass it as an option to createClient:
syslog.createClient(514, 'localhost', { name: 'fnord' });
license
See LICENSE file.
Copyright (c) 2011 Alexis Sellier