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Twinuma/ami-ebs-backup.php

Last active August 29, 2015 14:06
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AMIとSnapshotを自動取得。tagに"Backup-Generation/世代設定"をすることで可能。
Raw
ami-ebs-backup.php
#!/usr/bin/php
<?php
// 初期設定
require_once("/opt/aws/AWSSDKforPHP/sdk.class.php");
date_default_timezone_set("Asia/Tokyo");
$ec2 = new AmazonEC2(array(
"key" => "YOUR ACCESS KEY",
"secret" => "YOUR SECRET KEY"
));
$ec2->set_region(AmazonEC2::REGION_APAC_NE1);
error_log(date("Y/m/d H:i:s") . " [Info] Begin create images.");
// 対象EC2(runnning)の取得
$response = $ec2->describe_instances(array(
"Filter" => array(
array("Name" => "instance-state-name", "Value" => "running")
)
));
if(!$response->isOK()) {
error_log(date("Y/m/d H:i:s") . " [" . $response->body->Errors->Error->Code . "] " . $response->body->Errors->Error->Message);
}
// 対象EC2に対するバックアップ処理
if(isset($response->body->reservationSet->item)) {
foreach($response->body->reservationSet->item as $reservation) {
foreach($reservation->instancesSet->item as $instance) {
error_log(date("Y/m/d H:i:s") . " [Info] Begin execute instance(" . $instance->instanceId . ").");
$is_backup = false;
$instance_id = $instance->instanceId;
$image_tag = $instance_id;
// バックアップ条件の確認
if(isset($instance->tagSet->item)) {
foreach($instance->tagSet->item as $tag) {
if($tag->key == "Name" && $tag->value != null && trim($tag->value) != "") {
$image_tag = $tag->value;
}
if($tag->key == "Backup-Generation" && is_numeric($tag->value->to_string()) && intval($tag->value) > 0) {
$is_backup = true;
$generation = intval($tag->value);
}
}
}
// バックアップと世代管理の実施
if($is_backup) {
// AMI名の作成
$image_name = $image_tag . "-" . date("YmdHis");
// AMIの作成
$image_id = create_image($ec2, $image_name, $instance_id);
// 削除対象AMIの取得
$images = find_delete_images($ec2, $image_tag, $generation);
// AMIとスナップショットの削除
delete_images($ec2, $images);
// AMIにタグ付け
tag_image($ec2, $image_id, $image_tag);
// スナップショットにタグ付け
tag_snapshots($ec2, $image_id);
} else {
error_log(date("Y/m/d H:i:s") . " [Info] Skip create image from " . $instance->instanceId . ".");
}
error_log(date("Y/m/d H:i:s") . " [Info] End execute instance(" . $instance->instanceId . ").");
}
}
}
error_log(date("Y/m/d H:i:s") . " [Info] End create images.");
exit(0);
// AMIの作成
function create_image($ec2, $image_name, $instance_id) {
error_log(date("Y/m/d H:i:s") . " [Info] Begin create image(" . $image_name . ") from " . $instance_id . ".");
$response = $ec2->create_image(
$instance_id,
$image_name,
array(
"Description" => "Create from " . $instance_id . ".",
"NoReboot" => true
)
);
if(!$response->isOK()) {
error_log(date("Y/m/d H:i:s") . " [" . $response->body->Errors->Error->Code . "] " . $response->body->Errors->Error->Message);
}
error_log(date("Y/m/d H:i:s") . " [Info] End create image(" . $image_name . ") from " . $instance_id . ".");
return $response->body->imageId;
}
// 削除対象AMIの取得
function find_delete_images($ec2, $image_tag, $generation) {
$response = $ec2->describe_images(array("Filter" => array(
array("Name" => "tag:Name" , "Value" => $image_tag),
array("Name" => "tag:Backup-Type", "Value" => "auto")
)));
if(!$response->isOK()) {
error_log(date("Y/m/d H:i:s") . " [" . $response->body->Errors->Error->Code . "] " . $response->body->Errors->Error->Message);
}
$images = array();
foreach($response->body->imagesSet->item as $image) {
$images["$image->name"] = array(
"id" => $image->imageId,
"snapshots" => $image->blockDeviceMapping
);
}
krsort($images);
return array_slice($images, $generation - 1);
}
// AMIとスナップショットの削除
function delete_images($ec2, $images) {
foreach($images as $image_name => $image) {
error_log(date("Y/m/d H:i:s") . " [Info] Begin delete image(" . $image_name . ").");
$image_id = $image["id"];
$response = $ec2->deregister_image($image_id);
if(!$response->isOK()) {
error_log(date("Y/m/d H:i:s") . " [" . $response->body->Errors->Error->Code . "] " . $response->body->Errors->Error->Message);
}
error_log(date("Y/m/d H:i:s") . " [Info] End delete image(" . $image_name . ").");
foreach($image["snapshots"]->item as $snapshot) {
$snapshot_id = $snapshot->ebs->snapshotId;
error_log(date("Y/m/d H:i:s") . " [Info] Begin delete snapshot(" . $snapshot_id . ").");
$response = $ec2->delete_snapshot($snapshot_id);
if(!$response->isOK()) {
error_log(date("Y/m/d H:i:s") . " [" . $response->body->Errors->Error->Code . "] " . $response->body->Errors->Error->Message);
}
error_log(date("Y/m/d H:i:s") . " [Info] End delete snapshot(" . $snapshot_id . ").");
}
}
}
// AMIにタグ付け
function tag_image($ec2, $image_id, $image_tag) {
error_log(date("Y/m/d H:i:s") . " [Info] Begin tag(" . $image_tag . ") image to " . $image_id . ".");
$response = $ec2->create_tags($image_id, array(
array("Key" => "Name" , "Value" => $image_tag),
array("Key" => "Backup-Type", "Value" => "auto"),
));
if(!$response->isOK()) {
error_log(date("Y/m/d H:i:s") . " [" . $response->body->Errors->Error->Code . "] " . $response->body->Errors->Error->Message);
}
error_log(date("Y/m/d H:i:s") . " [Info] End tag(" . $image_tag . ") image to " . $image_id . ".");
}
// スナップショットにタグ付け
function tag_snapshots($ec2, $image_id) {
$response = $ec2->describe_images(array("ImageId" => $image_id));
foreach($response->body->imagesSet->item as $image) {
foreach($image->blockDeviceMapping->item as $snapshot) {
$snapshot_id = $snapshot->ebs->snapshotId;
$snapshot_tag = $image->name . "-" . basename($snapshot->deviceName);
error_log(date("Y/m/d H:i:s") . " [Info] Begin tag(" . $snapshot_tag . ") snapshot to " . $snapshot_id . ".");
$response = $ec2->create_tags($snapshot_id, array(
array("Key" => "Name" , "Value" => $snapshot_tag),
array("Key" => "Backup-Type", "Value" => "auto")
));
if(!$response->isOK()) {
error_log(date("Y/m/d H:i:s") . " [" . $response->body->Errors->Error->Code . "] " . $response->body->Errors->Error->Message);
}
error_log(date("Y/m/d H:i:s") . " [Info] End tag(" . $snapshot_tag . ") snapshot to " . $snapshot_id . ".");
}
}
}
?>
Raw
crontab
0 0 * * * /usr/bin/php /opt/aws/php/backup/ami-ebs-backup.php &> /opt/aws/php/backup/log/aws-backup-`date +\%Y\%m\%d\%H\%M\%S`.log
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