public function getEc2Client()
{
// the client to return
static $ec2Client = null;
if (!$ec2Client) {
// what are we doing?
$log = usingLog()->startAction("create AWS client for EC2");
// get the Aws client factory
$awsFactory = fromAws()->getAwsClientFactory();
// create the EC2 client
$ec2Client = $awsFactory->get('ec2');
$log->endAction();
}
// all done
return $ec2Client;
}
public function markAllVolumesAsDeleteOnTermination()
{
$this->requiresValidHost(__METHOD__);
// what are we doing?
$log = usingLog()->startAction("mark all volumes on EC2 VM '{$this->instanceName}' to be deleted on termination");
// create a list of all of the volumes we're going to modify
$ebsVolumes = array();
foreach ($this->instance['BlockDeviceMappings'] as $origEbsVolume) {
$ebsVolume = array('DeviceName' => $origEbsVolume['DeviceName'], 'Ebs' => array('DeleteOnTermination' => true));
$ebsVolumes[] = $ebsVolume;
}
// get the AWS EC2 client to work with
$ec2Client = fromAws()->getEc2Client();
// let's mark all of the volumes as needing to be deleted
// on termination
$ec2Client->modifyInstanceAttribute(array('InstanceId' => $this->instance['InstanceId'], 'BlockDeviceMappings' => $ebsVolumes));
// now, we need to make sure that actually worked
$this->instance = fromEc2()->getInstance($this->instanceName);
// var_dump("\n\n\nAFTER MODIFY INSTANCE ATTRIBUTE\n\n");
// var_dump($this->instance);
// that should be that
$log->endAction();
}
public function getInstance($instanceName)
{
// what are we doing?
$log = usingLog()->startAction("get data for EC2 VM '{$instanceName}'");
// get the client
$client = fromAws()->getEc2Client();
// get the list of running instances
$result = $client->describeInstances();
// loop through, and see if the instance is running
foreach ($result['Reservations'] as $reservation) {
foreach ($reservation['Instances'] as $instance) {
$foundInstanceName = '';
if (!isset($instance['Tags'])) {
// no tags at all means no name to match against
continue;
}
// skip terminated instances
if ($instance['State']['Code'] == 48) {
continue;
}
foreach ($instance['Tags'] as $tag) {
if ($tag['Key'] == 'Name') {
$foundInstanceName = $tag['Value'];
}
}
if ($instanceName == $foundInstanceName) {
// we're done here
$instanceId = $instance['InstanceId'];
$log->endAction("instance is running as ID '{$instanceId}'");
return $instance;
}
}
}
// if we get here, the instance currently does not exist at EC2
$log->endAction("instance does not exist");
return null;
}
/**
*
* @param Ec2VmDetails $vmDetails
* @return void
*/
public function destroyHost($vmDetails)
{
// what are we doing?
$log = usingLog()->startAction("destroy VM");
// get our Ec2 client from the SDK
$client = fromAws()->getEc2Client();
// what is our instanceId?
$instanceId = $vmDetails->ec2Instance['InstanceId'];
// let's destroy the VM
try {
$log->addStep("destroy EC2 VM instance '{$instanceId}'", function () use($client, &$response, $instanceId) {
$response = $client->terminateInstances(array("InstanceIds" => array($instanceId)));
});
// now, we need to wait until this instance has been terminated
$log->addStep("wait for EC2 VM '{$instanceId}' to finish terminating", function () use($client, $vmDetails, $response, $instanceId) {
$client->waitUntilInstanceTerminated(array('InstanceIds' => array($instanceId), 'waiter.interval' => 10, 'waiter.max_attempts' => 10));
});
} catch (Exception $e) {
// something went wrong
$log->endAction("VM failed to terminate :(");
throw new E5xx_ActionFailed(__METHOD__, $e->getMessage());
}
// if we get here, we need to forget about this VM
usingHostsTable()->removeHost($vmDetails->hostId);
// all done
$log->endAction();
}