Local modifications to ClusterLabs/Anvil by Alteeve
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#!/usr/bin/perl
#
# Open an SSH tunnel using the Net::OpenSSH module and keep it opened with an infinite loop.
#
use strict;
use warnings;
use Anvil::Tools;
use Net::OpenSSH;
$| = 1;
my $THIS_FILE = ($0 =~ /^.*\/(.*)$/)[0];
my $running_directory = ($0 =~ /^(.*?)\/$THIS_FILE$/)[0];
if (($running_directory =~ /^\./) && ($ENV{PWD}))
{
$running_directory =~ s/^\./$ENV{PWD}/;
}
my $anvil = Anvil::Tools->new({ on_sig_int => \&close_ssh_tunnel, on_sig_term => \&close_ssh_tunnel });
$anvil->Get->switches;
$anvil->Database->connect;
$anvil->Log->entry({ source => $THIS_FILE, line => __LINE__, level => 2, secure => 0, key => "log_0132" });
if (not $anvil->data->{sys}{database}{connections})
{
# No databases, exit.
$anvil->Log->entry({ source => $THIS_FILE, line => __LINE__, level => 0, 'print' => 1, priority => "err", key => "error_0003" });
$anvil->nice_exit({ exit_code => 1 });
}
my $ssh_forward_local_port = $anvil->data->{switches}{'forward-local-port'};
my $ssh_forward_remote_port = $anvil->data->{switches}{'forward-remote-port'};
my $ssh_remote_forward = $anvil->data->{switches}{'remote'};
my $ssh_port = $anvil->data->{switches}{'port'};
my $ssh_target = $anvil->data->{switches}{'target'};
my $ssh_user = $anvil->data->{switches}{'user'};
my $ssh_fh;
my ($open_rcode) = open_ssh_tunnel({
forward_local_port => $ssh_forward_local_port,
forward_remote_port => $ssh_forward_remote_port,
port => $ssh_port,
remote => $ssh_remote_forward,
target => $ssh_target,
user => $ssh_user,
});
$anvil->nice_exit({ exit_code => 1 }) if ($open_rcode > 0);
my $is_ssh_tunnel_alive = 1;
while ($is_ssh_tunnel_alive)
{
$is_ssh_tunnel_alive = $ssh_fh->test('echo');
sleep(60);
}
close_ssh_tunnel();
$anvil->nice_exit({ exit_code => 0 });
#
# Functions
#
sub open_ssh_tunnel
{
my $parameters = shift;
# Required parameters:
my $forward_local_port = $parameters->{forward_local_port};
my $forward_remote_port = $parameters->{forward_remote_port};
my $target = $parameters->{target};
# Optional parameters:
my $debug = $parameters->{debug} // 3;
my $port = $parameters->{port} // 22;
my $remote = $parameters->{remote} ? 1 : 0;
my $user = $parameters->{user} // "admin";
$anvil->Log->variables({ source => $THIS_FILE, line => __LINE__, level => $debug, list => $parameters });
return (1) if ( (not defined $user)
or (not defined $target)
or (not defined $forward_local_port)
or (not defined $forward_remote_port) );
my $ssh_fh_key = "${user}\@${target}:${port}";
my ($output, $error, $return_code) = $anvil->Remote->call({
no_cache => 1,
remote_user => $user,
shell_call => $anvil->data->{path}{exe}{echo}." 1",
target => $target,
});
$anvil->Log->variables({ source => $THIS_FILE, line => __LINE__, level => $debug, list => {
output => $output,
error => $error,
return_code => $return_code
} });
return (1) if ($output ne "1");
$ssh_fh = $anvil->data->{cache}{ssh_fh}{$ssh_fh_key};
delete $anvil->data->{cache}{ssh_fh}{$ssh_fh_key};
$anvil->Log->variables({ source => $THIS_FILE, line => __LINE__, level => $debug, list => {
is_ssh_fh_defined => defined $ssh_fh ? 1 : 0
} });
my $forward_option = "L";
my $port_a = $forward_local_port;
my $port_b = $forward_remote_port;
# When remote forward, change the option and reverse the ports.
if ($remote)
{
$forward_option = "R";
$port_a = $forward_remote_port;
$port_b = $forward_local_port;
}
$ssh_fh->system({ ssh_opts => [ "-O", "forward", "-${forward_option} 0.0.0.0:${port_a}:0.0.0.0:${port_b}" ] });
return (0);
}
sub close_ssh_tunnel
{
my $parameters = shift;
my $debug = $parameters->{debug} // 3;
if (defined $ssh_fh->disconnect)
{
$ssh_fh->disconnect();
$anvil->Log->variables({ source => $THIS_FILE, line => __LINE__, level => $debug, list => {
message => "SSH tunnel disconnected."
} });
}
}