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=cut
TITLE=graph-writer
DESCRIPTION=makes web-pages to generate the graphs and web-pages to tie the graphs together.
KEYWORDS=graph-writer
DOCTOP=index
DOCPREV=check-config
DOCNEXT=snmpif-setspeed
=pod
=head1 graph-writer
=head2 Usage:
=exec ../graph-writer -h 2>&1
=head2 Description:
This is the main remstats L<pagemaker|pagemakers>. It makes the
web-pages with the graphs and other pages to link them together and
organize them. There are three kinds of page that it makes:
=over 4
=item B<Indices> - The main three indices are the B<Overall Index>, the
B<Ping Index> and the B<Quick Index>. Each of these shows all the hosts
being monitored, grouped by the group you assigned them to. The
B<Overall Index> shows a section for each host, with a link to all of the
graphs for that host. The B<Ping Index> shows a small graph of the last
two hours of ping data for that host, for each host, with the graph background
specially coloured for hosts which aren't reachable. The B<Quick Index>
shows, for each host: a link, a status indicator and optionally a link to
L<alert.cgi|alert-cgi> for alerts for that host.
There is also the B<Custom Index> to show links to all the
L<customgraphs|configfile-customgraphs>.
=item B<Host Pages> - For each host, there is a B<Host Page> which shows
some information about the host and all the day graphs for that host. The
graphs are all links to ...
=for html <P></P>
=item B<Graph Pages> - Each graph is also available in various timespans,
depending on the L<times|configfile-times> that you specified in
the L<rrd|configfile-rrds> definition which caused the generation of
that graph.
=back 4
Graph-writer is the replacement for both C<grapher> and C<html-writer>.
Before version 0.10.0, C<grapher> would make new graphs, as part of the
update run, and C<html-writer> would re-write the html pages. Now,
C<graph-writer> makes a CGI script for each web-page, using C<rrdcgi> as
its interpreter. C<Rrdcgi> simply spits out the page as it was written
with "magic cookies" replaced by <IMG SRC...> tags and makes sure that
there is a recent version of the graph file. Much better than generating
all the graphs every five minutes and have most of them never get looked at.
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