SYLO

NAME

sylo - Daemon for reliable syslog over network

SYNOPSIS

sylo [options]
sylo [options] --daemon
sylo [options] --dump

DESCRIPTION

Sylo is a daemon that ensures that syslog which should be sent over the network to a remote syslog server and can not be delivered at the moment are stored on the disk to prevent the loss of that messages on local system failures.

The sylo is glued between the local syslog agent and the remote syslog server. The local syslog agent needs to be configured to send the outgoing syslog messages to a local pipe which is then read by the sylo daemon.

All messages delivered to the local pipe will be written to a silo which is a file on the disk of fixed size. Right after writing a log to the silo it will be processed to the remote syslog server. If the log has been delivered to the syslog server successfully it will be deleted from the silo. Otherwise it is kept in the silo and the sylo tries delivering the log again.

The logs are sent out in the same order as they come in (First in first out).

The silo has a fixed size. When no logs are in he silo it is "empty" but has all the time the configured size. When the logs can not be delivered to the remote syslog server the silo is being filled. By default the new logs are thrown away when the silo is full. There is an option to controll the behaviour when the silo is full. For details take a look at the sylo.conf (5) man page.

Logging of Sylo

Sylo logs to stdout by default. When called in daemon mode it outputs the logs to the configured logfile.

Using the -D flag it is possible to dump the current contents of the log silo. It is possible to enable a verbose mode in dump mode.

The verbose mode can also be enabled when logging to stdout (when sylo is not running in daemon mode.

GENERAL OPTIONS

The options may be given in any order. Options without an argument can be combined after a single dash.

-c, --config=FILE

The configuration file to use.

-d, --daemon

Starts the sylo daemon process. The daemon mode tells sylo to log the thelogfile.

-D, --dump

Starts the sylo in dump mode to show the current content of the configured log silo.

DAEMON OPTIONS

These are the options which are only used when started in daemon mode:

-v, --verbose

Prints verbose output to the console of the user.

FILES

/etc/sylo.conf

Configuration file for sylo.

See sylo.conf (5) for exact information.

BUGS

In case of any strange behaviour or when you found a bug in sylo please send a simple mail to one of the authors.

SEE ALSO

Please visit the official sylo homepage (http://sylo.mathias-kettner.de/) for additional information.

AUTHORS

Lars Michelsen <lm@mathias-kettner.de>