Import hostated, the host status daemon. This daemon will monitor

remote hosts and dynamically alter pf(4) tables and redirection rules
for active server load balancing.  The daemon has been written by
Pierre-Yves Ritschard (pyr at spootnik.org) and was formerly known as
"slbd".

The daemon is fully functional but it still needs some work and
cleanup so we don't link it to the build yet.  Some TODOs are a
partial rewrite of the check_* routines (use libevent whenever we
can), improvement of the manpages, and general knf and cleanup.

ok deraadt@ claudio@

1 files changed, 94 insertions, 0 deletions

diff --git a/usr.sbin/hostated/hostated.8 b/usr.sbin/hostated/hostated.8
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+.\"	$OpenBSD: hostated.8,v 1.1 2006/12/16 11:45:07 reyk Exp $
+.\"
+.\" Copyright (c) 2006 Pierre-Yves Ritschard <pyr@openbsd.org>
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd November 1, 2006
+.Dt HOSTATED 8
+.Os
+.Sh NAME
+.Nm hostated
+.Nd Host Status daemon
+.Sh SYNOPSIS
+.Nm
+.Op Fl dnv
+.Op Fl f Ar file
+.Sh DESCRIPTION
+.Nm
+is the host status daemon for server load balancing.
+Its main purpose is to maintain pf tables up to date
+as well as related pf rdr rules.
+To communicate with
+.Xr pf 4
+.Nm
+uses the anchor facility. To enable
+.Nm
+to install rulesets through the anchor you will
+need the following line in the NAT section of your
+.Xr pf.conf 5 
+configuration file:
+.Bd -literal -offset 2n
+rdr-anchor "hostated/*"
+.Ed
+.Pp
+.Nm
+manipulates three data types: services, tables and hosts.
+Each service represents a
+.Xr pf 4
+rdr rule. A service contains at least one table and one virtual ip which
+are used to create the proper rule.
+Each table contains at least one host, and is mapped to a
+.Xr pf 4
+table. Additionnaly, a table can be backed up i.e its content will be swapped
+by the content of another table when it is empty. This can be used to serve
+static content when a dynamic service goes down.
+See
+.Xr hostated.conf 5
+for a more detailed explanation of how to configure
+.Nm
+.
+.Pp
+.Xr hostatectl 8
+can be used to enable or disable hosts, tables and services as well
+as showing the current status of each object.
+.Pp
+The options are as follows:
+.Bl -tag -width Ds
+.It Fl d
+Do not daemonize.
+If this options is specified,
+.Nm
+will run in the foreground and log to
+.Em stderr .
+.It Fl f Ar file
+Specify an alternative configurate file.
+.It Fl n
+Configtest mode.
+Only check the configuration file for validity.
+.It Fl v
+Produce more verbose output.
+.El
+.Sh FILES
+.Bl -tag -width "/var/run/hostated.sockXX" -compact
+.It /etc/hostated.conf
+Default
+.Nm
+configuration file.
+.It /var/run/hostated.sock
+Unix-domain socket used for communication with
+.Xr hostatectl 8 .
+.El
+.Sh SEE ALSO
+.Xr hostated.conf 5 ,
+.Xr hostatectl 8