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#!/usr/bin/perl
# $Id$
use strict;
use warnings;
use IPC::Open2;
use Getopt::Long;
use Data::Dumper;
use File::Path;
my $SCIRE_CONFIG_FILE = '../etc/scire.conf'; #will be /etc/scire.conf when released.
my %conf;
my ($SERVER_STDOUT, $SERVER_STDIN);
my $connection_pid;
run_main();
sub run_main {
parse_command_line();
my $conf_file = (defined($conf{config})) ? $conf{config} : $SCIRE_CONFIG_FILE;
read_config_file($conf_file);
check_job_dir();
my $connection_command = build_connection_command();
#ok folks so here's how this thang goes down.
#1. Connect.
create_connection($connection_command);
#2. Register with the DB. (only it knows if you're allowed to be active)
# If we do not have a defined key file, we assume this is the first run of this client
# so we register them instead of trying to identify.
if(defined($conf{key_file}) and (-f $conf{key_file})) {
if(!identify_client()) {
exit(1);
}
} else {
register_client();
exit(0);
}
#3. Scan the jobs directory. If there are done/failed jobs, report them. Note jobs in running or queue.
my @existing_jobs = scan_jobs_dir();
#4. Fetch the jobs list
get_jobs();
#5. ???
#6. Profit!
}
sub parse_command_line {
GetOptions(
'debug|d' => \$conf{debug},
'dry-run' => \$conf{dry_run},
'help|h' => \$conf{help},
'config|c=s' => \$conf{config},
'threads|t=i' => \$conf{max_threads},
#config overrides.
'host=s' => \$conf{host},
'port=i' => \$conf{port},
'user|u=s' => \$conf{user},
'server_script=s' => \$conf{server_script},
'job_dir' => \$conf{job_dir},
);
if ($conf{help}) {
print "\nusage: scireclient.pl [--debug or -d]\n\t [--dry-run]"
."\t [--config=CONF or -c] \n\t [--threads=# or -t] \t [--help or -h] \n"
."\t [[--host=HOST] \t [--port=PORT] \t [--user=USER or -u] \n\t"
." [--server_script=foo.pl] \t [--job_dir=/tmp/jobs] \n";
exit 0;
}
}
sub send_command {
my $cmd = shift;
my @args = @_;
my $tosend = "${cmd}";
for my $arg (@args) {
if($arg =~ /^[0-9]+$/) {
$tosend .= " ${arg}";
} else {
$arg =~ s/"/\\"/g;
$tosend .= " \"${arg}\"";
}
}
debug("Sending: ${tosend}");
print SERVER_STDIN "${tosend}\n";
#FIXME WE NEED A TIMEOUT HERE OF SOME SORT!!
#if the server doesn't give you a newline this just hangs!
my $response = <SERVER_STDOUT>;
return $response;
}
sub parse_response {
my $response = shift;
$response =~ /^(OK|ERROR)(?: (.+))?$/;
my ($status, $message) = ($1, $2);
return ($status, $message);
}
sub create_connection {
# XXX: How do we capture this error? $pid has a valid value even if the
# process fails to run, since it just returns the PID of the forked perl
# process. I tried adding 'or die' after it, but it didn't help since it
# doesn't fail in the main process. When it fails, it outputs an error
# to STDERR:
# open2: exec of ../server/scireserver.pl failed at ./scireclient.pl line 116
my $connection_command = shift;
$connection_pid = open2(*SERVER_STDOUT, *SERVER_STDIN, $connection_command);
}
sub build_connection_command {
# This will eventually be something like "ssh scire@${scireserver} /usr/bin/scireserver.pl"
my $connection_command = "ssh ";
$connection_command .= "-o BatchMode yes ";
$connection_command .= "-o SendEnv 'SCIRE_*' ";
$connection_command .= "-o ServerAliveInterval 15 -o ServerAliveCountMax 4 ";
if(defined($conf{port})) {
$connection_command .= "-o Port=$conf{port} ";
}
$connection_command .= "$conf{user}\@$conf{host} $conf{server_script}";
if (-d ".svn") {
# Overwrite $connection_command in the case of a dev environment for now
$connection_command = "../server/scireserver.pl";
}
return $connection_command;
}
sub check_job_dir {
if (! -d $conf{job_dir}) {
print "WARNING! $conf{job_dir} does not exist...creating\n";
mkpath( $conf{job_dir}, {verbose => 1, mode => 0660})
or die("Couldn't make $conf{job_dir} w/ perms 0660: $!");
}
}
sub read_config_file {
my $conf_file = shift;
open(FH, "< ${conf_file}") or die("Couldn't open the config file ${conf_file}: $!");
while (<FH>) {
chomp;
next if /^\s*(?:#|$)/;
if(/^\s*(.+?)\s*=\s*(.+?)\s*(?:#.*)?$/) {
unless(defined($conf{lc($1)})) { #Don't overwrite anything specified in cmdline
$conf{lc($1)} = $2;
}
}
}
close(FH) or die("Couldn't close the config file ${conf_file}: $!");
}
sub register_client {
# my $mac = "00:11:22:33:44:55";
# my $ip = "192.168.2.3";
my ($mac, $ip) = get_interface_info(defined $conf{interface} && $conf{interface} ? $conf{interface} : "eth0");
my ($status, $message) = parse_response(send_command("REGISTER", $mac, $ip));
die "Could not register client $mac w/ ip $ip. Got: $message" if (! defined $status or $status ne "OK");
debug("Client registered. Status is pending.");
}
sub identify_client {
open(FILE, $conf{key_file}) or die "Couldn't open client_key $conf{key_file}: $!";
my $client_key = join("", <FILE>);
close(FILE);
$conf{key_type} ||= "DSA";
# my $key_obj = Net::SSH::Perl::Key->new($conf{key_type}, $client_key);
# my $fingerprint = $key_obj->fingerprint();
my $fingerprint = "124567890";
my ($status, $message) = parse_response(send_command("IDENTIFY", $fingerprint));
unless (defined $status && $status eq "OK") {
print "Could not identify to server: $message\n";
return 0;
}
debug("Client identified");
return 1;
}
sub get_jobs {
my ($status, $jobs) = parse_response(send_command("GET_JOBS"));
unless (defined $status && $status eq "OK") {
print "Could not get jobs list from server: $message\n";
return 0;
}
$jobs =~ s/\s//g; #Remove all whitespace
my @jobs_list = split(/,/, $jobs);
foreach my $job (@jobs_list) {
my ($status, $message) = parse_response(send_command("GET_JOB", $job));
open(JOBFILE, ">$conf{job_dir}/queue/${job}.job") or do {
print "Could not open $conf{job_dir}/queue/${job}.job for writing: $!";
next;
};
# XXX: Modify this to fetch a file instead
# print JOBFILE parse_response($resp);
close(JOBFILE);
debug("Fetched job $job ");
}
#This function doesn't actually need to do anything with the list of jobs, the executor handles that part.
}
sub scan_jobs_dir {
#Scan the dirs for job files.
my @existing_jobs = glob("$conf{job_dir}/queue/*");
my @failed_jobs = glob("$conf{job_dir}/failed/*");
my @done_jobs = glob("$conf{job_dir}/done/*");
#Report on those jobs needing reporting.
foreach my $job_file (@failed_jobs) {
$job_file =~ /(\d+)\.job/;
my $jobid = $1;
my ($status, $message) = parse_response(send_command("SET_JOB_STATUS $jobid 'Failed'"));
open(FILE, $job_file) or die "Couldn't open job file $job_file: $!";
my $job_data = join("", <FILE>);
close(FILE);
}
#may be able to use same code as above.
foreach my $job_file (@done_jobs) {
$job_file =~ /(\d+)\.job/;
my $jobid = $1;
my ($status, $message) = parse_response(send_command("SET_JOB_STATUS $jobid 'Done'"));
}
return @existing_jobs;
}
sub debug {
my $msg = shift;
if($conf{debug}) {
print STDERR $msg."\n";
}
}
sub get_interface_info {
my $interface = shift;
my $info = `/sbin/ifconfig ${interface}`;
$info =~ /^.+HWaddr ([a-zA-Z0-9:]+).+inet addr:([0-9.]+).+$/s;
my ($mac, $ip) = ($1, $2);
return ($mac, $ip);
}
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