symfony command

ConnectCommand.php

#!/usr/bin/php
<?php

namespace DockerImages;

require_once __DIR__.'/vendor/autoload.php';

use Symfony\Component\Console\Application;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;

use Symfony\Component\Console\Question\Question;

class ConnectCommand extends Command {
	private $sshUser;

	/**
	 * Configures the current command.
	 */
	protected function configure() {
		$this->setName('connect')
			->setDescription('Connect to Docker Container')
			->addArgument(
				'id',
				InputArgument::OPTIONAL,
				'What Container would you like to connect to?'
			)->addOption(
				'user',
				null,
				InputOption::VALUE_OPTIONAL,
				'What user would you like to connect via SSH?'
			);
	}


	/**
	 * @param InputInterface $input
	 * @param OutputInterface $output
	 * @return int|null|void
	 */
	protected function execute(InputInterface $input, OutputInterface $output) {
		$id = $input->getArgument('id');
		$this->sshUser = $input->getOption('user') ? $input->getOption('user') : 'qa';

		$processes = $this->getRunningProcesses();
		if (empty($processes)) {
			$output->write("There are no Docker containers running on this machine\n");
			exit(1);
		}


		if ($id) {
			$this->connectContainer($id, $this->sshUser);
			exit(0);
		} else {
			$output->write($this->showRunningContainers($processes));
			$helper = $this->getHelper('question');
			$question = new Question("What Docker Container would you like to connect to?\n");
			$id = $helper->ask($input, $output, $question);

			if (array_key_exists($id-1, $processes)) {
				$this->connectContainer($processes[$id - 1], $this->sshUser);
			} else {
				$output->write("There's no Docker container with that ID\n");
				exit(1);
			}
		}
	}


	/**
	 * get the running Docker processes
	 * @return array
	 */
	protected function getRunningProcesses() {
		$command = 'sudo docker ps -q';
		$processes = null;
		exec($command, $processes);
		return $processes;
	}


	/**
	 * create some kind of a table showing the running Docker containers
	 * @param $processes
	 * @return string
	 */
	protected function showRunningContainers($processes) {
		$output = "Docker Containers running on this machine\n";
		$output .= "--------------------------------------------\n";

		if (is_array($processes) && !empty($processes)) {
			$i = 1;

			foreach ($processes as $process) {
				$output .= "$i) $process with IP ".$this->getDockerContainerIp($process)." (".$this->getDockerContainerName($process).")\n";
				$i++;
			}
		}

		$output .= "--------------------------------------------\n";
		return $output;
	}


	/**
	 * fetch the Docker Container name by id
	 * @param $id
	 * @return mixed
	 */
	protected function getDockerContainerName($id) {
		$command = "sudo docker inspect -f '{{ .Name }}' $id";
		$ip = null;
		exec($command, $ip);
		return $ip[0];
	}


	/**
	 * fetch the Docker Container IP by it's ID
	 * @param $id
	 * @return mixed
	 */
	protected function getDockerContainerIp($id) {
		$command = "sudo docker inspect -f '{{ .NetworkSettings.IPAddress }}' $id";
		$ip = null;
		exec($command, $ip);
		return $ip[0];
	}


	/**
	 * connect to the Docker Container via SSH
	 * @param $id
	 */
	protected function connectContainer($id, $user) {
		$command = "ssh $user@$(sudo docker inspect -f '{{ .NetworkSettings.IPAddress }}' $id)";
		passthru($command);
		exit(0);
	}
}

$app = new Application();
$app->add(new ConnectCommand());
$app->run();

composer require symfony/console

./ConnectCommand.php connect
Docker Containers running on this machine
--------------------------------------------
1) af8ed09f3796 with IP 172.17.0.166 (/frontenddocker_frontend_1)
2) e7d101ed4f23 with IP 172.17.0.161 (/frontenddocker_database_1)
--------------------------------------------
What Docker Container would you like to connect to?