AWS:TAGで指定したサーバのEBS Snapshotを取得

LambdaでPythonがサポートされたので使ってみる

Python初心者なので、勉強がてらLambda Pythonを使ってみました。
Rootボリュームしか取っていないので、手が空いたら配列処理するよう改良します。

ebs_backup.py

import os, time
import json
import boto3
from datetime import datetime

#=== setting - Change here!!!
tag_name1 = "myServer1"

#=== execute take snapshot
def execute_snapshot(ebs_id):
    ec2 = boto3.resource('ec2')
    ebs = ec2.Volume(ebs_id)
    try:
        now = datetime.now()
        desc = "%s_%s" % (tag_name1, now.strftime("%Y%m%d"))
        snap = ebs.create_snapshot(Description=desc)
        snap.create_tags(
            Tags=[
                {
                'Key': 'Name',
                'Value': tag_name1
                },
                {
                'Key': 'Date',
                'Value': now.strftime("%Y%m%d")
                },
            ]
        )
    except:
        return "NG"
    return "OK"

#=== get EC2 Info
def get_ec2_info(tag_name):
    client = boto3.client('ec2')
    info_ec2 = client.describe_instances(
        Filters=[
            {
                'Name': 'tag-value',
                'Values': [
                    tag_name,
                ]
            },
        ]
    )
    try:
        ec2_ebs = info_ec2['Reservations'][0]['Instances'][0]['BlockDeviceMappings'][0]['Ebs']['VolumeId']
    except:
        print "NG"
    return ec2_ebs

#=== main process
def lambda_handler(event, context):
    print '========= Make Snapshot(%s): %s =========' % (tag_name1, datetime.now())
    ebs_id = get_ec2_info(tag_name1)
    result = execute_snapshot(ebs_id)
    print '========= Process is %s. End time(Volid=%s): %s =========' % (result, ebs_id, datetime.now())
    return "OK"

LambdaのCron使うとめちゃ便利！