aalneyperl has asked for the wisdom of the Perl Monks concerning the following question:

Hi all, This is my script. 
#!/usr/bin/perl
# Check the health of a mysql server.
use strict;
use warnings;
use Getopt::Long;
use DBI;
use HTML::Template;

my %variables = ();
my %status = ();
my $resl = ();
# --
# Print out the usage message
# --
sub usage {
    print "usage: check_mysqlhealth.pl -H <host> -u <user> -p <passwor
+d> \n";
    print "       Optional parameters:\n";
    print "       --port <port> \n";
}

$|=1;

# --
# Parse arguments and read Configuration
# --
my ($host, $user, $password, $port);
GetOptions (
    'host=s' => \$host,
    'H=s' => \$host,
    'user=s' => \$user,
    'u=s' => \$user,
    'password=s' => \$password,
    'p:s' => \$password,
    'port=i' => \$port,
);

if (!$host || !$user) {
    usage();
    exit(1);
}

if (!$port) {
    $port = 3306;
}

my $totalTime = time();

# --
# Establish connection
# --
my $state = "OK";
my $dbh;
eval {
    $dbh = DBI->connect("DBI:mysql:host=$host;port=$port", $user, $pas
+sword, {'RaiseError' => 1});

};

if ($@) {
    my $status = $@;
    print 'CRITICAL: Connect failed with reason ' . $status . "\n";
    exit 2;
}

#open the html template
my $template=HTML::Template->new(filename => '/root/cookbook/perl/Mysq
+lHC.tmpl');

&var();
&stat();
&repl();


sub var
{
my $sgv = $dbh->prepare("show variables");
$sgv->execute();
#my %variables = ();
while (my ($keyword, $value) = $sgv->fetchrow_array()) {
    $variables{$keyword} = $value;
}
$sgv->finish();
}

sub stat
{
my $sth = $dbh->prepare("show status");
$sth->execute();
#my %status= ();
while (my ($keyword,$value) = $sth->fetchrow_array())
{
$status{$keyword} = $value;
}
$sth->finish();
}


sub repl
{
               
my $rs = $dbh->prepare("show status like 'slave_running'");
my $rrdbs = $dbh->prepare("show variables like 'read_rnd_buffer_size'"
+);
$rs->execute();
$rrdbs->execute();

while(my @vall = $rs->fetchrow_array())
     {
       $template->param(Replication => $vall[1]);
        if($vall[1] eq 'ON')
             {
                 print "The system is configured as Mysql Replication 
+SLAVE\n";
                 print " The following is the  Slave Status\n";
                 my $mas_hos = $dbh->prepare("show slave status");
                 $mas_hos->execute();
                       while (my @val = $mas_hos->fetchrow_array())
                           {
                                  print "Slave_IO_State: $val[0]\n";
                                  print "Master_host: $val[1]\n";
                                  print "Slave_IO_Running: $val[10]\n"
+;
                                  print "Slave_SQL_Running: $val[11]\n
+\n";
                                 #print "Seconds_Behind_master: $val[3
+3]\n";
                           }
                 $mas_hos->finish();
             }
      }
}

# send the obligatory Content-Type and print the template output
  print "Content-Type: text/html\n\n", $template->output;

[download]
and this my template file.. 
<html> <head><title>Mysql Health Check Script</title> <body>Replicatio
+n Slave Status  < TMPL_VAR NAME=Replication></body></html>

[download]
can anybody show me how to get the output of Replication slave. I got to know that i dont need a webserver to get the output. Question 1)How to get the out on a browser 2)how do i run the file or files or which file do i need to run and from where. 3) I had gone thru HTML::Template tutorial but i dint get these answers.. 4) Where do i need to place the files or..if i am not wrong do they have to placed under perl/cgi-bin somthing like that ..? Point my mistakes in the script... I am really sorry to ask such dum question..NEWBIE

Replies are listed 'Best First'.
Re: Help with HTML:Template
by roboticus (Chancellor) on Dec 07, 2007 at 13:42 UTC
    aalneyperl:

    To answer your questions:

    1) If you don't use a webserver, then you'll need to put the resulting output file on your machine and point the browser at that file, e.g., "file:///C:/WWWTemp/foo.html".

    2) You can run your perl program manually (such as from a DOS window) to regenerate your html file. If it's a simple status monitoring page, just run it as a scheduled job periodically. Then make a bookmark to your local status page, and you can check it whenever you like.

    3) HTML::Template tutorial is going to show you how to use it. It's a tool that lets you make HTML documents. It's not going to show you how to deliver the documents. It's a totally different job...

    4) You can place the files anywhere you like. The perl/cgi-bin is a convention used for web servers (as far as I know ... I've never made a perl web app before). If you're creating your own, you can make your own conventions.

    FYI: You could make it an active document such that you could have an HTML document on your machine, and have a bit of VBScript (if you're using IE) call your perl script to do the job.

    Hope this helps!

    ...roboticus

[reply]
      Hi, Thanks roboticus ... As you can see from my code..i plan to use HTML::Template mondule..can you let me know where am i going wrong.
[reply]
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