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<?php |
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/* this file is part of pipelines */ |
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namespace Ktomk\Pipelines\Runner\Docker; |
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use Ktomk\Pipelines\Cli\Exec; |
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use Ktomk\Pipelines\Cli\ExecTester; |
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use Ktomk\Pipelines\Lib; |
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/** |
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* Class DockerAbstractionLayer Implementation |
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* |
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* Implement all of the docker interaction (first of all from runners' |
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* side) with the docker cli (the docker client binary) with a defined |
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* interface. Any (new) interaction (inter!) with docker client |
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* programmed against the interface so it can become part of the |
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* runner component (for the interface) and inverse the dependency |
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* against the hard working implementation. |
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* |
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* First implementation of the abstraction layer, as runner driven, |
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* placed in there but perhaps must not belong into there but a |
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* component of it's own (still exec driven, yet no passthru() in use, |
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* hope to keep it, but it's a more leaking abstraction for pipelines, |
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* so let's see how clean this can be done, in CLI context, passthru() |
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* is especially useful for the overall pipelines utility, maybe when |
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* breaking with it due to null-byte prevention leakage, see KNOWN BUGS) |
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* |
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* @package Ktomk\Pipelines\Runner\Docker |
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*/ |
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class AbstractionLayerImpl implements AbstractionLayer |
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{ |
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/** |
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* @var bool |
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*/ |
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private $throws; |
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/** |
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* @var Exec |
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*/ |
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private $exec; |
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/** |
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* DockerAbstractionLayer constructor. |
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* |
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* @param Exec $exec |
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* @param bool $throws optional |
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*/ |
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public function __construct(Exec $exec, $throws = null) |
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{ |
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$this->exec = $exec; |
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$this->throws($throws); |
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} |
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public function execute($id, array $arguments) |
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{ |
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$status = $this->exec->capture( |
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$cmd = Lib::cmd( |
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'docker', |
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Lib::merge('exec', $id, $arguments) |
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), |
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array(), |
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$out, |
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$err |
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); |
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1 |
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if (0 !== $status) { |
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$this->notifyNonZero($cmd, $status, $out, $err); |
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return null; |
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} |
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return rtrim($out); |
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} |
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1 |
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public function kill($idOrName) |
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{ |
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$status = $this->exec->capture( |
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$cmd = Lib::cmd( |
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'docker', |
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Lib::merge('kill', $idOrName) |
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), |
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array(), |
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$out, |
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$err |
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); |
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1 |
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if (0 !== $status) { |
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$this->notifyNonZero($cmd, $status, $out, $err); |
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return null; |
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} |
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return rtrim($out); |
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} |
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public function remove($idOrName, $force = true) |
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{ |
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$status = $this->exec->capture( |
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$cmd = Lib::cmd( |
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'docker', |
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Lib::merge('rm', $force ? '-f' : null, $idOrName) |
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), |
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array(), |
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$out, |
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$err |
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); |
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if (1 === $status) { |
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return null; |
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} |
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if (0 !== $status) { |
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$this->notifyNonZero($cmd, $status, $out, $err); |
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return null; |
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} |
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return rtrim($out); |
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} |
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public function start($image, array $arguments, array $runArguments = array()) |
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{ |
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$status = $this->exec->capture( |
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$cmd = Lib::cmd( |
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'docker', |
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Lib::merge('run', array('--detach', '--entrypoint', '/bin/sh', '-it'), $arguments, $image, $runArguments) |
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), |
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array(), |
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$out, |
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$err |
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); |
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if (0 !== $status) { |
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$this->notifyNonZero($cmd, $status, $out, $err); |
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return null; |
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} |
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return rtrim($out); |
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} |
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/* tar methods */ |
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public function importTar($tar, $id, $path) |
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{ |
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$status = $this->exec->capture( |
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$cmd = Lib::cmd( |
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sprintf('<%s docker', Lib::quoteArg($tar)), |
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array( |
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'cp', |
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'-', |
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sprintf('%s:%s', $id, $path), |
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) |
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), |
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array(), |
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$out, |
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$err |
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); |
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if (0 !== $status) { |
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$this->notifyNonZero($cmd, $status, $out, $err); |
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return null; |
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} |
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return true; |
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} |
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public function exportTar($id, $path, $tar) |
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{ |
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$status = $this->exec->capture( |
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$cmd = Lib::cmd( |
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sprintf('>%s docker', Lib::quoteArg($tar)), |
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array( |
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'cp', |
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sprintf('%s:%s', $id, $path), |
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'-', |
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) |
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), |
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array(), |
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$out, |
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$err |
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); |
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if (0 !== $status) { |
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$this->notifyNonZero($cmd, $status, $out, $err); |
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return null; |
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} |
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return $tar; |
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} |
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/* layer error/exception handling */ |
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7 |
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public function throws($throws = null) |
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{ |
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$this->throws = null === $throws |
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? $this->exec instanceof ExecTester |
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: $throws; |
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} |
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/** |
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* notify non zero status |
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* |
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* internal representation to throw, leaking as some non-zero values |
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* for some of the abstractions are expected to simplify the interface |
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* in which case the notification is not called. |
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* |
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* @param string $cmd |
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* @param int $status |
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* @param string $out |
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* @param string $err |
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*/ |
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private function notifyNonZero($cmd, $status, $out, $err) |
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{ |
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6 |
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if (!$this->throws) { |
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return; |
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} |
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throw new \RuntimeException( |
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sprintf( |
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"Failed to execute\n\n %s\n\ngot status %d and error:\n\n %s\n\nwith output:\n\n %s\n", |
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$cmd, |
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$status, |
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$err, |
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$out |
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) |
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); |
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} |
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} |
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ktomk /
pipelines
