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darylounet/elb-internal-route53-updater.php

Last active September 18, 2023 12:03
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  1. darylounet revised this gist May 15, 2016. 1 changed file with 4 additions and 2 deletions.
    6 changes: 4 additions & 2 deletions elb-internal-route53-updater.php
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    Original file line number Diff line number Diff line change
    @@ -11,8 +11,10 @@
    $route53InternalRecordName = 'your-route53-record.internal.'; // Ending with dot

    $config = array(
    'key' => 'Your IAM Key',
    'secret' => 'Your IAM Secret',
    'credentials' => [
    'key' => 'Your IAM Key',
    'secret' => 'Your IAM Secret',
    ]
    'region' => 'us-west-1'
    );

  2. darylounet created this gist May 1, 2016.
    113 changes: 113 additions & 0 deletions elb-internal-route53-updater.php
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    Original file line number Diff line number Diff line change
    @@ -0,0 +1,113 @@
    #!/usr/bin/php
    <?php
    /**
    * ELB Internal Route53 Updater
    * @author Cyril Aknine https://github.com/darylounet
    */

    $vpcId = 'your-vpc-id';
    $elbNetworkDescription = 'Your ELB network interface description (generated like "ELB your-elb-name")';
    $route53InternalHostedZoneId = 'Your Route53 Internal hosted zone ID';
    $route53InternalRecordName = 'your-route53-record.internal.'; // Ending with dot

    $config = array(
    'key' => 'Your IAM Key',
    'secret' => 'Your IAM Secret',
    'region' => 'us-west-1'
    );

    /*
    * IAM Policy Requirements
    {
    "Version": "2012-10-17",
    "Statement": [
    {
    "Sid": "Stmt1462092886000",
    "Effect": "Allow",
    "Action": [
    "ec2:DescribeNetworkInterfaces"
    ],
    "Resource": [
    "*"
    ]
    },
    {
    "Sid": "Stmt1462092981000",
    "Effect": "Allow",
    "Action": [
    "route53:ChangeResourceRecordSets",
    "route53:ListResourceRecordSets"
    ],
    "Resource": [
    "*"
    ]
    }
    ]
    }
    */

    // http://docs.aws.amazon.com/aws-sdk-php/v3/download/aws.phar
    require dirname(__FILE__) . '/aws.phar';

    use Aws\Ec2\Ec2Client;
    use Aws\Route53\Route53Client;

    $ec2Client = new Ec2Client(array_merge($config, [ 'version' => '2015-10-01' ]));
    $elbInterfaces = $ec2Client->describeNetworkInterfaces(array(
    'Filters' => array(
    array(
    'Name' => 'description',
    'Values' => [ $elbNetworkDescription ]
    ),
    array(
    'Name' => 'vpc-id',
    'Values' => [ $vpcId ]
    )
    )
    ));

    $elbIps = array();
    foreach ($elbInterfaces['NetworkInterfaces'] as $elbInterface) {
    $elbIps[] = $elbInterface['PrivateIpAddress'];
    }
    sort($elbIps);

    $route53Client = new Route53Client(array_merge($config, [ 'version' => '2013-04-01', 'region' => 'us-east-1' ]));
    $records = $route53Client->listResourceRecordSets(array(
    'HostedZoneId' => $route53InternalHostedZoneId,
    'StartRecordName' => $route53InternalRecordName
    ));

    $route53elbIps = array();
    foreach ($records['ResourceRecordSets'][0]['ResourceRecords'] as $record) {
    $route53elbIps[] = $record['Value'];
    }
    sort($route53elbIps);

    // Check if Route53 update is needed
    if ($elbIps === $route53elbIps) {
    die('Same Ips detected - no update needed'. PHP_EOL);
    }

    $route53ResourceRecords = array();
    foreach ($elbIps as $ip) {
    $route53ResourceRecords[] = array('Value' => $ip);
    }

    $route53Client->changeResourceRecordSets(array(
    'HostedZoneId' => $route53InternalHostedZoneId,
    'ChangeBatch' => array(
    'Comment' => 'ELB Private IPs update',
    'Changes' => array(
    array(
    'Action' => 'UPSERT',
    'ResourceRecordSet' => array(
    'Name' => $route53InternalRecordName,
    'TTL' => 60,
    'Type' => 'A',
    'ResourceRecords' => $route53ResourceRecords
    )
    )
    )
    )
    ));