misc_pterodactyl-panel/app/Services/Deployment/FindViableNodesService.php

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<?php
namespace Pterodactyl\Services\Deployment;
use Pterodactyl\Models\Node;
use Webmozart\Assert\Assert;
use Illuminate\Support\Collection;
use Illuminate\Contracts\Pagination\LengthAwarePaginator;
use Pterodactyl\Exceptions\Service\Deployment\NoViableNodeException;
class FindViableNodesService
{
protected array $locations = [];
protected ?int $disk = null;
protected ?int $memory = null;
/**
* Set the locations that should be searched through to locate available nodes.
*/
public function setLocations(array $locations): self
{
Assert::allIntegerish($locations, 'An array of location IDs should be provided when calling setLocations.');
$this->locations = $locations;
return $this;
}
/**
* Set the amount of disk that will be used by the server being created. Nodes will be
* filtered out if they do not have enough available free disk space for this server
* to be placed on.
*/
public function setDisk(int $disk): self
{
$this->disk = $disk;
return $this;
}
/**
* Set the amount of memory that this server will be using. As with disk space, nodes that
* do not have enough free memory will be filtered out.
*/
public function setMemory(int $memory): self
{
$this->memory = $memory;
return $this;
}
/**
* Returns an array of nodes that meet the provided requirements and can then
* be passed to the AllocationSelectionService to return a single allocation.
*
* This functionality is used for automatic deployments of servers and will
* attempt to find all nodes in the defined locations that meet the disk and
* memory availability requirements. Any nodes not meeting those requirements
* are tossed out, as are any nodes marked as non-public, meaning automatic
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* deployments should not be done against them.
*
* @param int|null $page If provided the results will be paginated by returning
* up to 50 nodes at a time starting at the provided page.
* If "null" is provided as the value no pagination will
* be used.
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*
* @throws \Pterodactyl\Exceptions\Service\Deployment\NoViableNodeException
*/
public function handle(int $perPage = null, int $page = null): LengthAwarePaginator|Collection
{
Assert::integer($this->disk, 'Disk space must be an int, got %s');
Assert::integer($this->memory, 'Memory usage must be an int, got %s');
$query = Node::query()->select('nodes.*')
->selectRaw('IFNULL(SUM(servers.memory), 0) as sum_memory')
->selectRaw('IFNULL(SUM(servers.disk), 0) as sum_disk')
->leftJoin('servers', 'servers.node_id', '=', 'nodes.id')
->where('nodes.public', 1);
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if (!empty($this->locations)) {
$query = $query->whereIn('nodes.location_id', $this->locations);
}
$results = $query->groupBy('nodes.id')
->havingRaw('(IFNULL(SUM(servers.memory), 0) + ?) <= (nodes.memory * (1 + (nodes.memory_overallocate / 100)))', [$this->memory])
->havingRaw('(IFNULL(SUM(servers.disk), 0) + ?) <= (nodes.disk * (1 + (nodes.disk_overallocate / 100)))', [$this->disk]);
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if (!is_null($page)) {
$results = $results->paginate($perPage ?? 50, ['*'], 'page', $page);
} else {
$results = $results->get()->toBase();
}
if ($results->isEmpty()) {
throw new NoViableNodeException(trans('exceptions.deployment.no_viable_nodes'));
}
return $results;
}
}