Local modifications to ClusterLabs/Anvil by Alteeve
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#!/usr/bin/perl
#
# Manages VNC ports for server VMs that have VNC enabled.
#
use strict;
use warnings;
use Anvil::Tools;
use Data::Dumper;
use JSON;
$| = 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();
$anvil->Log->level({ set => 2 });
sub get_server_info
{
my $parameters = shift;
my $server_uuid = $parameters->{server_uuid};
my $server_info;
my $query = "
SELECT
ser.server_name, hos.host_name, hos.host_uuid
FROM
public.servers AS ser
JOIN
public.hosts AS hos
ON
ser.server_host_uuid = hos.host_uuid
WHERE
server_uuid = ".$anvil->Database->quote($server_uuid)."
;";
my $results = $anvil->Database->query({ query => $query, source => $THIS_FILE, line => __LINE__ });
my $count = @{$results};
if ($count == 1)
{
my $row = $results->[0];
$server_info = {};
$server_info->{server_name} = $row->[0];
$server_info->{host_name} = $row->[1];
$server_info->{host_uuid} = $row->[2];
$anvil->Log->variables({ source => $THIS_FILE, line => __LINE__, level => 2, list => {
server_name => $server_info->{server_name},
host_name => $server_info->{host_name},
host_uuid => $server_info->{host_uuid}
} });
}
return $server_info;
}
sub get_vnc_info
{
my $parameters = shift;
my $host_name = $parameters->{host_name};
my $server_name = $parameters->{server_name};
my $port_base = 5900;
# Requires root to access VM information.
my $shell_call = "ssh -n root@".$host_name." \"virsh vncdisplay ".$server_name."\"";
my $vnc_info;
my ($shell_output, $shell_return_code) = $anvil->System->call({ shell_call => $shell_call });
$anvil->Log->variables({ source => $THIS_FILE, line => __LINE__, level => 2, list => {
shell_output => $shell_output,
shell_return_code => $shell_return_code
} });
if ($shell_return_code == 0)
{
my ($port_offset) = $shell_output =~ /:(\d+)$/;
$vnc_info = { host_name => $host_name };
$vnc_info->{port} = $port_base + int($port_offset);
$anvil->Log->variables({ source => $THIS_FILE, line => __LINE__, level => 2, list => {
port_offset => $port_offset,
vnc_port => $vnc_info->{port}
} });
}
return $vnc_info;
}
sub is_websockify_process
{
my $parameters = shift;
my $host_name = $parameters->{host_name};
my $ws_pid = $parameters->{ws_pid};
my $shell_call = "ssh -n ".$host_name." \"ps -o comm -h -p ".$ws_pid."\"";
my ($shell_output, $shell_return_code) = $anvil->System->call({ shell_call => $shell_call });
$anvil->Log->variables({ source => $THIS_FILE, line => __LINE__, level => 2, list => {
shell_output => $shell_output,
shell_return_code => $shell_return_code
} });
return $shell_output eq "websockify" ? 1 : 0;
}
sub is_ssh_process
{
my $parameters = shift;
my $ssh_tunnel_pid = $parameters->{ssh_tunnel_pid};
my $shell_call = "ps -o comm -h -p ".$ssh_tunnel_pid;
my ($shell_output, $shell_return_code) = $anvil->System->call({ shell_call => $shell_call });
$anvil->Log->variables({ source => $THIS_FILE, line => __LINE__, level => 2, list => {
shell_output => $shell_output,
shell_return_code => $shell_return_code
} });
return $shell_output eq "ssh" ? 1 : 0;
}
sub is_websockify_exists
{
my $parameters = shift;
my $server_uuid = $parameters->{server_uuid};
my $server_vnc_port = $parameters->{server_vnc_port};
my $query = "
SELECT
vnc.server_vnc_port, hos.host_name, vnc.ws_pid
FROM
public.vnc_pipes AS vnc
JOIN
public.hosts AS hos
ON
vnc.ws_host_uuid = hos.host_uuid
WHERE
server_uuid = ".$anvil->Database->quote($server_uuid)."
;";
my $results = $anvil->Database->query({ query => $query, source => $THIS_FILE, line => __LINE__ });
my $count = @{$results};
my $is_exists = 0;
if ($count > 1)
{
my $row = $results->[0];
my $server_vnc_port_in_record = $row->[0];
my $host_name = $row->[1];
my $ws_pid = $row->[2];
my $clean_up_parameters = { host_name => $host_name, ws_pid => $ws_pid };
if ($server_vnc_port != $server_vnc_port_in_record)
{
# VNC server port mismatch/oudated; require clean up.
stop_websockify($clean_up_parameters);
return $is_exists;
}
if (not is_websockify_process($clean_up_parameters))
{
# Process died; require clean up.
return $is_exists;
}
# Passed all tests; process considered exists.
$is_exists = 1;
}
return $is_exists;
}
sub start_websockify
{
my $parameters = shift;
my $server_uuid = $parameters->{server_uuid};
my $host_name = $parameters->{host_name};
my $target_port = $parameters->{target_port};
my $ws_info;
if (not is_websockify_exists({ server_uuid => $server_uuid, server_vnc_port => $target_port }))
{
my $source_port_base = 10000;
my $source_port = $source_port_base + $target_port;
my $shell_call = "ssh -n ".$host_name." 'websockify ".$source_port." :".$target_port." & echo pid:\$!'";
my ($shell_output, $shell_return_code) = $anvil->System->call({ shell_call => $shell_call });
$anvil->Log->variables({ source => $THIS_FILE, line => __LINE__, level => 2, list => {
shell_output => $shell_output,
shell_return_code => $shell_return_code
} });
if ($shell_return_code == 0)
{
my ($ws_pid) = $shell_output =~ /^pid:(\d+)$/;
$ws_info = {};
$ws_info->{pid} = $ws_pid;
$ws_info->{source_port} = $source_port;
$anvil->Log->variables({ source => $THIS_FILE, line => __LINE__, level => 2, list => { ws_pid => $ws_pid } });
}
}
return $ws_info;
}
sub stop_websockify
{
my $parameters = shift;
my $host_name = $parameters->{host_name};
my $ws_pid = $parameters->{ws_pid};
if (is_websockify_process($parameters))
{
my $shell_call = "ssh -n ".$host_name." \"kill -9 ".$ws_pid."\"";
my ($shell_output, $shell_return_code) = $anvil->System->call({ shell_call => $shell_call });
$anvil->Log->variables({ source => $THIS_FILE, line => __LINE__, level => 2, list => {
shell_output => $shell_output,
shell_return_code => $shell_return_code
} });
}
}
sub stop_ssh_tunnel
{
my $parameters = shift;
my $ssh_tunnel_pid = $parameters->{ssh_tunnel_pid};
if (is_ssh_process($parameters))
{
my $shell_call = "kill -9 ".$ssh_tunnel_pid;
my ($shell_output, $shell_return_code) = $anvil->System->call({ shell_call => $shell_call });
$anvil->Log->variables({ source => $THIS_FILE, line => __LINE__, level => 2, list => {
shell_output => $shell_output,
shell_return_code => $shell_return_code
} });
}
}
sub create_vnc_pipes_table
{
my $query = "
CREATE TABLE IF NOT EXISTS public.vnc_pipes (
uuid uuid not null primary key,
server_uuid uuid not null,
server_vnc_port numeric not null,
ws_host_uuid uuid not null,
ws_pid numeric not null,
ssh_tunnel_host_uuid uuid not null,
ssh_tunnel_pid numeric not null,
modified_date timestamp with time zone not null
);";
$anvil->Database->write({ query => $query, source => $THIS_FILE, line => __LINE__ });
}
sub drop_vnc_pipes_table
{
my $query = "DROP TABLE IF EXISTS public.vnc_pipes;";
$anvil->Database->write({ query => $query, source => $THIS_FILE, line => __LINE__ });
}
sub insert_vnc_pipe
{
my $parameters = shift;
my $server_uuid = $parameters->{server_uuid};
my $server_vnc_port = $parameters->{server_vnc_port};
my $ws_host_uuid = $parameters->{ws_host_uuid};
my $ws_pid = $parameters->{ws_pid};
my $ssh_tunnel_host_uuid = $parameters->{ssh_tunnel_host_uuid};
my $ssh_tunnel_pid = $parameters->{ssh_tunnel_pid};
my $query = "
INSERT INTO public.vnc_pipes (
server_uuid, server_vnc_port, ws_host_uuid, ws_pid, ssh_tunnel_host_uuid, ssh_tunnel_pid
) VALUES (
".$anvil->Database->quote($server_uuid).",
".$anvil->Database->quote($ws_host_uuid).",
".$anvil->Database->quote($ws_pid).",
".$anvil->Database->quote($ssh_tunnel_host_uuid).",
".$anvil->Database->quote($ssh_tunnel_pid)."
);";
$anvil->Database->write({ query => $query, source => $THIS_FILE, line => __LINE__ });
}
sub get_vnc_pipe
{
my $parameters = shift;
my $server_uuid = $parameters->{server_uuid};
my $host_uuid = $parameters->{host_uuid};
my $vnc_pipe_info;
my $query = "
SELECT
hos.host_name, vnc.ws_pid, vnc.ssh_tunnel_pid
FROM
public.vnc_pipes AS vnc
JOIN
public.hosts AS hos
ON
vnc.ws_host_uuid = hos.host_uuid
WHERE
server_uuid = ".$anvil->Database->quote($server_uuid)."
AND
ssh_tunnel_host_uuid = ".$anvil->Database->quote($host_uuid)."
;";
my $results = $anvil->Database->query({ query => $query, source => $THIS_FILE, line => __LINE__ });
my $count = @{$results};
if ($count == 1)
{
my $row = $results->[0];
$vnc_pipe_info = {};
$vnc_pipe_info->{host_name} = $row->[0];
$vnc_pipe_info->{ws_pid} = $row->[1];
$vnc_pipe_info->{ssh_tunnel_pid} = $row->[2];
$anvil->Log->variables({ source => $THIS_FILE, line => __LINE__, level => 2, list => {
host_name => $vnc_pipe_info->{host_name},
ws_pid => $vnc_pipe_info->{ws_pid},
ssh_tunnel_pid => $vnc_pipe_info->{ssh_tunnel_pid}
} });
}
return $vnc_pipe_info;
}
sub delete_vnc_pipe
{
my $parameters = shift;
my $server_uuid = $parameters->{server_uuid};
my $host_uuid = $parameters->{host_uuid};
my $query = "
DELETE FROM public.vnc_pipes
WHERE
server_uuid = ".$anvil->Database->quote($server_uuid)."
AND
ssh_tunnel_host_uuid = ".$anvil->Database->quote($host_uuid)."
;";
$anvil->Database->write({ query => $query, source => $THIS_FILE, line => __LINE__ });
}
$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 });
}
# Read in any CGI variables, if needed.
$anvil->Get->cgi();
$anvil->Database->get_hosts();
$anvil->Database->get_anvils();
print $anvil->Template->get({ file => "shared.html", name => "json_headers", show_name => 0 })."\n";
my $response_body = {};
my $request_body;
if (defined $anvil->data->{cgi}{PUTDATA}{value})
{
my $is_decode_json_success = eval {
$request_body = decode_json($anvil->data->{cgi}{PUTDATA}{value});
};
if (not $is_decode_json_success)
{
$anvil->Log->entry({
source => $THIS_FILE,
line => __LINE__,
level => 0,
'print' => 1,
priority => "err",
key => "error_0304",
variables => { request_body_string => $anvil->data->{cgi}{PUTDATA}{value}, json_decode_error => $@ }
});
}
}
my $server_uuid = exists $request_body->{server_uuid} ? $request_body->{server_uuid} : $anvil->data->{switches}{'server-uuid'};
my $is_open = exists $request_body->{is_open} ? $request_body->{is_open} : $anvil->data->{switches}{'is-open'};
$anvil->Log->variables({ source => $THIS_FILE, line => __LINE__, level => 2, list => {
server_uuid => $server_uuid,
is_open => $is_open
} });
if ($server_uuid)
{
if ($is_open)
{
my $server_info = get_server_info({ server_uuid => $server_uuid });
my $vnc_info = get_vnc_info($server_info);
create_vnc_pipes_table();
my $ws_info = start_websockify({ server_uuid => $server_uuid, host_name => $server_info->{host_name}, target_port => $vnc_info->{port} });
}
else
{
my $vnc_pipe_parameters = { server_uuid => $server_uuid, host_uuid => $anvil->Get->host_uuid() };
my $vnc_pipe_info = get_vnc_pipe($vnc_pipe_parameters);
stop_websockify({ host_name => $vnc_pipe_info->{host_name}, ws_pid => $vnc_pipe_info->{ws_pid} });
stop_ssh_tunnel({ ssh_tunnel_pid => $vnc_pipe_info->{ssh_tunnel_pid} });
delete_vnc_pipe($vnc_pipe_parameters);
}
}
elsif ($anvil->data->{switches}{'drop-table'})
{
drop_vnc_pipes_table();
}
print JSON->new->utf8->encode($response_body)."\n";