PHP를 사용한 클라우드 컴퓨팅, Part 2: Amazon EC2와 Zend Framework 함께 사용하기

; Configuration file to hold secret keys, account numbers and other useful
; strings for Amazon and other cloud accounts.

[amazon]
accessKey=0123456789ABCDEFGHIJ
secretKey=0123456789abcdefghiABCDEFGHI1234567890AB
ownerId=123456789012
            

require_once 'Credentials.php';

$creds = new Credentials;
$aws_key = $creds->getCredential('amazon', 'accessKey');
$aws_secret = $creds->getCredential('amazon', 'secretKey');

$ec2_img = new Zend_Service_Amazon_Ec2_Image($aws_key, $aws_secret);
            

if (!file_exists('amis.text') ||
    array_key_exists('refresh', $_POST)) {
  $imageData = $ec2_img->describe();
  $amiFile = fopen('amis.text', 'w');
  $myOwnerId = $creds->getCredential('amazon', 'ownerId');
  foreach ($imageData as $nextImage) {
    if ($nextImage['imageOwnerId'] === $myOwnerId)
      fwrite($amiFile, $nextImage['imageId']."\n");
  }
  fclose($amiFile);
}
            

$amiList = file('amis.text', FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
foreach ($amiList as $nextAmi) {
  echo "<tr>";

  // Each table row is a form. Clicking the 'Start this image' button submits
  // the data from the current row, which tells instances.php which image to
  // start and which key pair and security group to use. 
  echo "<form action='manage_instance.php' method='POST' ";
  echo " onsubmit='return confirm(\"Start image '".$nextAmi."'?\")'>";
  echo "<input type='hidden' name='imagetostart' value='".$nextAmi."'/>";

  echo "<td>".$nextAmi."</td>";

  // Get the description of this AMI
  $imageData = $ec2_img->describe(array('imageId' => $nextAmi));
  echo "<td>".$imageData[0]['imageLocation']."</td>";
  echo "<td>".$imageData[0]['imageState']."</td>";

  // If the platform is blank, assume it's some flavor of Linux
  if (strlen($imageData[0]['platform']))
    echo "<td>".$imageData[0]['platform']."</td>";
  else
    echo "<td>Linux</td>";

  // Insert the lists of key pairs and security groups
  echo "<td>".$keypairsForm."</td>";
  echo "<td>".$secGroupsForm."</td>";

  // If the state of the image is "available," insert a start button.
  if ($imageData[0]['imageState'] == 'available')
    echo "<td><input type='submit' value='Start this image'/></td>";
  else
    echo "<td>Not available</td>";

  echo "</form>";
  echo "</tr>";
}
            

$ec2_kp = new Zend_Service_Amazon_Ec2_Keypair($aws_key, $aws_secret);
$keypairs = $ec2_kp->describe();
foreach ($keypairs as $key => $row) {
  $keyName[$key]  = $row['keyName'];
  $keyFingerprint[$key] = $row['keyFingerprint'];
}
array_multisort($keyName, $keypairs);

$keypairsList = "<select name='keypair'>";
foreach ($keypairs as $nextKeypair) {
  $keypairsList = $keypairsList."<option value='".$nextKeypair['keyName']."'>";
  $keypairsList = $keypairsList.$nextKeypair['keyName']."</option>";
}
$keypairsList = $keypairsList."</select>";

$secGroupsList = "<select name='secgroup'>";
$ec2_sg = new Zend_Service_Amazon_Ec2_Securitygroups($aws_key, $aws_secret);
$securityGroups = $ec2_sg->describe();
foreach ($securityGroups as $key => $row) {
  $groupName[$key]  = $row['groupName'];
  $groupDescription[$key] = $row['groupDescription'];
}
array_multisort($groupName, $securityGroups);

foreach ($securityGroups as $nextGroup) {
  $secGroupsList = $secGroupsList."<option value='".$nextGroup['groupName']."'>";
  $secGroupsList = $secGroupsList.$nextGroup['groupName']."</option>";
}
$secGroupsList = $secGroupsList."</select>";
            

$creds = new Credentials;
$aws_key = $creds->getCredential('amazon', 'accessKey');
$aws_secret = $creds->getCredential('amazon', 'secretKey');

$ec2_instance = new Zend_Service_Amazon_Ec2_Instance($aws_key, $aws_secret);
            

if (strlen($imageIdToStart) && strlen($keypairToStart) && strlen($secgroupToStart)) {
  $startResults = $ec2_instance->run(array('imageId' => $imageIdToStart, 
                                           'keyName' => $keypairToStart,
                                           'securityGroup' => $secgroupToStart));

  echo "<p><b>Status of instance ".$startResults['instances'][0]['instanceId'].": ";
  echo $startResults['instances'][0]['instanceState']['name'].".</b></p><hr/>";
}
            

$instanceDetails = $ec2_instance->describe();
if (count($instanceDetails['instances'])) {
  echo "<table border='1' cellpadding='5'>";
  echo "<tr style='font-weight: bold;'>";
  echo "<td>Status</td><td>Instance ID</td><td>AMI ID</td><td>Public DNS name</td>";
  echo "<td>Security Group</td><td>Key Pair</td><td>&nbsp;</td><td>&nbsp;</td>";
  echo "</tr>";

  foreach ($instanceDetails['instances'] as $nextInstance) {
    echo "<tr>";
    $status = $nextInstance['instanceState']['name'];
    // Make the cell background green if the status is running.
    if (strripos('running', $status) === 0)
      echo "<td style='background-color: green; color: white; font-weight: bold;'>";

    // Make the cell background yellow if the status is shutting-down.
    else if (strripos('shutting-down', $status) === 0)
      echo "<td style='background-color: yellow; font-weight: bold;'>";

    // Make the cell background red if the status is terminated.
    else if (strripos('terminated', $status) === 0)
      echo "<td style='background-color: red; color: white; font-weight: bold;'>";

    // Make the cell background purple for any other status.
    else
      echo "<td style='background-color: purple; color: white; font-weight: bold;'>";
    echo $status."</td>";

      echo "<td>".$nextInstance['instanceId']."</td>";
    echo "<td>".$nextInstance['imageId']."</td>";
    echo "<td>".$nextInstance['dnsName']."</td>";
    echo "<td><a href='securitygroup.php?groupname=".$nextInstance['groupSet'][0];
    echo "&previous=instances'>".$nextInstance['groupSet'][0]."</a></td>";
    echo "<td>".$nextInstance['keyName']."</td>";
    . . .
            

if (strripos('running', $status) === false) {
      echo "<i>[Can't reboot]</i>";
    }
    else {
     echo "<form action='manage_instance.php' method='POST' ";
      echo "onsubmit='return confirm(\"Reboot instance &apos;";
      echo $nextInstance['instanceId']."&apos;?\")'>";
      echo "<input type='hidden' name='imagetoreboot' value='";
      echo $nextInstance['instanceId']."'/>";
      echo "<input type='submit' value='Reboot'/></form>";
    }
    echo "</td>";

    echo "<td style='text-align: center;'>";
    if (strripos('running', $status) === false) {
      echo "<i>[Can't terminate]</i>";
    }
    else {
     echo "<form action='manage_instance.php' method='POST' ";
      echo "onsubmit='return confirm(\"Terminate instance &apos;";
      echo $nextInstance['instanceId']."&apos;?\")'>";
      echo "<input type='hidden' name='imagetoterminate' value='";
      echo $nextInstance['instanceId']."'/>";
      echo "<input type='submit' value='Terminate'/></form>";
    }
    echo "</td>";
            

$creds = new Credentials;
$ec2_kp = new Zend_Service_Amazon_Ec2_Keypair>
                ($creds->getCredential('amazon', 'accessKey'), 
                 $creds->getCredential('amazon', 'secretKey'));

$keypairs = $ec2_kp->describe();
if (count($keypairs)) {
  echo "<p>Here are the key pairs defined for your account:</p>";

  echo "<table border='1' cellpadding='5'>";
  echo "<tr style='font-weight: bold;'>";
  echo "<td>Key Pair Name</td>";
  echo "<td>Fingerprint</td>";
  echo "<td>&nbsp;</td>";
  echo "</tr>";

  foreach ($keypairs as $key => $row) {
    $keyName[$key] = $row['keyName'];
    $keyFingerprint[$key] = $row['keyFingerprint'];
  }
  array_multisort($keyName, $keypairs);

  foreach ($keypairs as $nextKeypair) {
    echo "<tr>";
    echo "<td>&nbsp;".$nextKeypair['keyName']."</td>";
    echo "<td>&nbsp;".$nextKeypair['keyFingerprint']."</td>";
    echo "<td>";
    echo "<form action='".$_SERVER['PHP_SELF']."' method='post'";
    echo " onsubmit='return confirm(\"Do you really want to delete the key pair ";
    echo "&apos;".$nextKeypair['keyName']."&apos;?\");'>";
    echo "<input type='hidden' name='keypairtodelete' ";
    echo "value='".$nextKeypair['keyName']."'/>";
    echo "<input type='submit' value='Delete'/>";
    echo "</form>";
    echo "</td>";
    echo "</tr>";
  }
  echo "</table>";
}
else
  echo "<p>Sorry, your account doesn't have any key pairs defined.</p>";
            

if (strlen($keypairToDelete)) {
  echo "<p><b>";
  try {
    $ec2_kp->delete($keypairToDelete);
    echo "The key pair named ".$keypairToDelete." was deleted successfully.";
  }
  catch (Zend_Service_Amazon_Ec2_Exception $ec2e) {
    echo "The key pair could not be deleted. The error message from Amazon is:";
    echo "<br/><br/><i>".$ec2e->getMessage()."</i>";
  }
  echo "</b></p><hr/><br/>";
}
            

foreach ($list[0]['ipPermissions'] as $key => $row) {
  $ipProtocol[$key] = $row['ipProtocol'];
  $startingPort[$key] = $row['fromPort'];
  $toPort[$key] = $row['toPort'];
  $ipRanges[$key] = $row['ipRanges'];
}
array_multisort($startingPort, SORT_ASC, $list[0]['ipPermissions']);

foreach($list[0]['ipPermissions'] as $rule) {
. . .
  echo "<tr>\n";
  echo "<td>&nbsp;".strtoupper($rule['ipProtocol'])."</td>\n";
  echo "<td>&nbsp;".$rule['fromPort']."</td>\n";
  echo "<td>&nbsp;".$rule['toPort']."</td>\n";

  if ((is_array($rule['ipRanges']) && count($rule['ipRanges']) == 0) ||
      (strlen($rule['ipRanges']) == 0)) {
    echo "<td>&nbsp;---</td>\n";
    echo "<td>&nbsp;</td>\n";
  }
  else {
    echo "<td>&nbsp;".$rule['ipRanges']."</td>\n";
    echo "<td style='text-align: center;'>";
    echo "<form action='".$_SERVER['PHP_SELF']."' method='POST'";
    echo " onsubmit='return confirm(\"Do you really want to revoke access for IP ";
    echo " address range '".$rule['ipRanges']."' on this port?\");'>";
    echo "<input type='hidden' name='groupname' value='".$groupName."'/>";
    echo "<input type='hidden' name='fromport' value='".$rule['fromPort']."'/>";
    echo "<input type='hidden' name='toport' value='".$rule['toPort']."'/>";
    echo "<input type='hidden' name='iptorevoke' value='".$rule['ipRanges']."'/>";
    echo "<input type='submit' value='Revoke'/></form></td>";
  }

foreach ($list[0]['ipPermissions'] as $key => $row) {
  $ipProtocol[$key] = $row['ipProtocol'];
  $startingPort[$key] = $row['fromPort'];
  $toPort[$key] = $row['toPort'];
  $ipRanges[$key] = $row['ipRanges'];
}
array_multisort($startingPort, SORT_ASC, $list[0]['ipPermissions']);

foreach($list[0]['ipPermissions'] as $rule) {
. . .
  echo "<tr>\n";
  echo "<td>&nbsp;".strtoupper($rule['ipProtocol'])."</td>\n";
  echo "<td>&nbsp;".$rule['fromPort']."</td>\n";
  echo "<td>&nbsp;".$rule['toPort']."</td>\n";

  if ((is_array($rule['ipRanges']) && count($rule['ipRanges']) == 0) ||
      (strlen($rule['ipRanges']) == 0)) {
    echo "<td>&nbsp;---</td>\n";
    echo "<td>&nbsp;</td>\n";
  }
  else {
    echo "<td>&nbsp;".$rule['ipRanges']."</td>\n";
    if (strripos('0.0.0.0', $rule['ipRanges'][0]) === false) {
      echo "<td style='text-align: center;'>";
      echo "<form action='".$_SERVER['PHP_SELF']."' method='POST'";
    echo " onsubmit='return confirm(\"Do you really want to revoke access for IP ";
    echo " address range '".$rule['ipRanges']."' on this port?\");'>";
    echo "<input type='hidden' name='groupname' value='".$groupName."'/>";
    echo "<input type='hidden' name='fromport' value='".$rule['fromPort']."'/>";
    echo "<input type='hidden' name='toport' value='".$rule['toPort']."'/>";
    echo "<input type='hidden' name='iptorevoke' value='".$rule['ipRanges']."'/>";
      echo "<input type='submit' value='Revoke'/></form></td>";
    }
    else
    echo "<td>&nbsp;</td>";

if (strlen($ipToAuthorize) && strripos($ipToAuthorize, '/') === false)
  $ipToAuthorize = $ipToAuthorize."/32";
  . . .
  try {
    $ec2_sg->authorizeIp($groupName, $protocol, $fromPort, $toPort, $ipToAuthorize);
    echo "IP address ".$ipToAuthorize." is now authorized.";
  }
  catch (Zend_Service_Amazon_Ec2_Exception $ec2e) {
     // We get an exception if this IP address is already authorized, that's okay. 
    if ($ec2e->getErrorCode() == 'InvalidPermission.Duplicate')
      echo "IP address range ".$ipToAuthorize." is already authorized.";

    // If the IP address range isn't formatted correctly, tell the user. 
    else if ($ec2e->getErrorCode() == 'InvalidPermission.Malformed')
      echo "The value ".$ipToAuthorize." is not a valid IP address range.";

    //  For all other exceptions, we just dump the exception to the screen.
    else {
      echo "<i>Something really bad happened:</i><br/><pre>";
      var_dump($ec2e);
      echo "</pre>";
    }
  }