AWS Lambda – Copy more than 5 EC2 Snapshots automatically between regions
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Copying EC2 snapshot between regions is quite an easy task now. In some scenarios, we may have to copy more than 5 snapshots automatically without any human entration.
Snapshot copy operation has a limitation of copying max 5 snapshots at one time. Hence you can not copy more than 5 snapshots at a time.
Following are the steps to automate to copy more than 5 Snapshots.
Let’s say, we have around 50 snapshots in a region, and you want to automate to copying all Snapshots to another region on AWS.
Step 1: Create a tag in all 50 Snapshots like Key=Backup, and Value=Yes
Step 2: Use below filter for getting all Snapshots yet to copy.
Filters=[{‘Name’:’tag:Backup’,’Values’:[‘Yes’]}]
Step 3: After getting all Snapshots with applied filter, run a for loop (max 5 iteration) and start copying only 5 Snapshots.
Step 4: Once the copy done, change the original Snapshot tag as follow:
Key=Backup, and Value=Yes —- To Key=Backup, and Value=Completed
Next time when this Lambda function will run, it will fetch all Snapshot except Completed on.
Step 5: To run this Lambda function, create a CloudWatch scheduler, and call this lambda function every 10 minutes.
Following is Lambda function:
import boto3
import time
region_source = 'us-east-1'
region_dest = 'ap-southeast-1'
client_source = boto3.client('ec2',region_name=region_source)
client_dest = boto3.client('ec2',region_name=region_dest)
ec2_resource = boto3.resource('ec2')
#Getting all snapshots as per specified filter
def get_snapshots():
response = client_source.describe_snapshots(
Filters=[{'Name':'tag:Backup','Values':['Yes']}]
)
return response["Snapshots"]
#Creating a list of snapshot_id and respective tags
def get_snapshot_list(snapshots):
snapshot_list = []
for snapshot in snapshots:
snapshot_id = snapshot["SnapshotId"]
tags = snapshot["Tags"]
snapshot_list.append((snapshot_id, tags))
return snapshot_list
#Copying snapshot with tags
def copy_snapshot(snapshot_id, tags):
print "Started copying.. snapshot_id: " + snapshot_id + ", from: " + region_source + ", to: " + region_dest
try:
copy_response = client_dest.copy_snapshot(
Description='copied from us-east-1',
SourceRegion=region_source,
SourceSnapshotId=snapshot_id,
DryRun=False
)
except Exception, e:
raise e
new_snapshot_id = copy_response["SnapshotId"]
print 'new_snapshot_id : ' + new_snapshot_id
new_snapshot = ec2_resource.Snapshot(new_snapshot_id)
#Creating tags in new snapshort
tag = new_snapshot.create_tags(
DryRun=False,
Tags=tags
)
create_tag(client_dest, new_snapshot_id, 'Source Snapshot Id', snapshot_id)
delete_tag(client_source, snapshot_id, 'Backup', 'Yes')
create_tag(client_source, snapshot_id, 'Backup', 'Completed')
print "Successfully copyied.. snapshot_id: " + snapshot_id + ", from: " + region_source + ", to: " + region_dest
return new_snapshot_id
def delete_tag(client, snapshot_id, key, value):
print "Deleting tag - " + key ":" + value + ", snapshot_id: " + snapshot_id
client.delete_tags(
Resources=[snapshot_id],
Tags=[
{
'Key': key,
'Value':value
},
]
)
def create_tag(client, snapshot_id, key, value):
print "Creating tag - " + key ":" + value + ", snapshot_id: " + snapshot_id
client.create_tags(
Resources=[snapshot_id],
Tags=[
{
'Key': key,
'Value':value
},
]
)
def lambda_handler(event, context):
snapshots = get_snapshots()
snapshot_list = get_snapshot_list(snapshots)
i = 0
for snapshort in snapshot_list:
if i < 5:
snapshot_id = snapshort[0]
tags = snapshort[1]
new_snapshot_id = copy_snapshot(snapshot_id, tags)
i = i + 1
else:
exit(0)
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Hii, Please provide the IAM role used by the Lambda function.
I would be a great help
Great article! But which version of the python is this and what role have to be assigned to lambda function