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Dave Osment
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Corrected indentation
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‎ebs-snapshot-creator.py‎

Lines changed: 137 additions & 137 deletions
Original file line numberDiff line numberDiff line change
@@ -1,138 +1,138 @@
11
import boto3
2-
import collections
3-
import datetime
4-
import os
5-
6-
ec = boto3.client('ec2')
7-
8-
def lambda_handler(event, context):
9-
10-
# Get Current Region
11-
aws_region = os.getenv('AWS_REGION')
12-
13-
# Determine Which Instances To SnapShot
14-
instances = ec.describe_instances(
15-
Filters=[
16-
{ 'Name': 'tag:Backup', 'Values': ['Yes'] },
17-
]
18-
).get(
19-
'Reservations', []
20-
)[0]['Instances']
21-
22-
print "Found %d instances that need backing up" % len(instances)
23-
24-
# Iterate Over Each Instance & SnapShot Volumes Not Explicitly Excluded From Backups
25-
for instance in instances:
26-
27-
# Determine Retention Period Based Upon Tags
28-
retention_days = 7
29-
destination_region = None
30-
instance_name = ""
31-
for tag in instance['Tags']:
32-
if tag['Key'] == 'RetentionDays' and tag['Value'] > 0:
33-
retention_days = int(tag['Value'])
34-
35-
if tag['Key'] == 'DestinationRegion' and len(tag['Value']) > 0:
36-
destination_region = tag['Value']
37-
38-
if tag['Key'] == 'Name' and len(tag['Value']) > 0:
39-
instance_name = tag['Value']
40-
41-
print "Setting SnapShot retention period To %s days" % (retention_days)
42-
43-
# Determine When We're Going To Delete This SnapShot
44-
delete_date = datetime.date.today() + datetime.timedelta(days=retention_days)
45-
delete_fmt = delete_date.strftime('%Y-%m-%d')
46-
47-
# Set Default SnapShot Tags
48-
snapshot_tags = [
49-
{ 'Key': 'DeleteOn', 'Value': delete_fmt },
50-
{ 'Key': 'Type', 'Value': 'Automated' },
51-
]
52-
53-
# If We Want To Offsite This SnapShot, Set The Appropriate Tag
54-
if destination_region != None:
55-
snapshot_tags = snapshot_tags + [{ 'Key': 'DestinationRegion', 'Value': destination_region }]
56-
57-
# List All Volumes Attached To The Instance
58-
for dev in instance['BlockDeviceMappings']:
59-
60-
# Set Variable Defaults
61-
snapshot_required = True
62-
volume_name = None
63-
64-
if dev.get('Ebs', None) is None:
65-
continue
66-
vol_id = dev['Ebs']['VolumeId']
67-
dev_name = dev['DeviceName']
68-
69-
# Get a Volume Object Based Upon Volume ID
70-
volume = ec.describe_volumes(
71-
VolumeIds=[vol_id,]
72-
)['Volumes'][0]
73-
74-
# Set Default SnapShot Description
75-
description = '%s - %s (%s)' % (
76-
instance_name,
77-
vol_id,
78-
dev_name
79-
)
80-
81-
if 'Tags' in volume:
82-
for tag in volume['Tags']:
83-
84-
# Determine If Volume Has 'Backup' Flag Set To 'No' & Exclude From SnapShot If It Does
85-
if tag['Key'] == 'Backup' and tag['Value'] == 'No':
86-
snapshot_required = False
87-
88-
# Override Default Description With Volume Name If One Specified
89-
if tag['Key'] == 'Name':
90-
description = tag['Value']
91-
92-
93-
# We Don't Want To SnapShot Any Volume Explictly Excluded
94-
if snapshot_required == False:
95-
print "\tIgnoring EBS volume %s (%s) on instance %s - 'Backup' Tag set to 'No'" % (
96-
vol_id,
97-
dev_name,
98-
instance['InstanceId']
99-
)
100-
101-
continue
102-
103-
104-
print "\tFound EBS volume %s (%s) on instance %s - Proceeding with SnapShot" % (
105-
vol_id,
106-
dev_name,
107-
instance['InstanceId']
108-
)
109-
110-
# Take SnapShot Of Volume
111-
snap = ec.create_snapshot(
112-
VolumeId=vol_id,
113-
Description=description
114-
)
115-
116-
if not (snap):
117-
print "\t\tSnapShot operation failed!"
118-
continue
119-
120-
print "\t\tSnapshot %s created in %s of [%s]" % (
121-
snap['SnapshotId'],
122-
aws_region,
123-
description
124-
)
125-
126-
print "\t\tRetaining snapshot %s of volume %s from instance %s (%s) for %d days" % (
127-
snap['SnapshotId'],
128-
vol_id,
129-
instance['InstanceId'],
130-
instance_name,
131-
retention_days,
132-
)
133-
134-
# Tag The SnapShot To Facilitate Later Automated Deletion & Offsiting
135-
ec.create_tags(
136-
Resources=[snap['SnapshotId']],
137-
Tags=snapshot_tags
138-
)
2+
import collections
3+
import datetime
4+
import os
5+
6+
ec = boto3.client('ec2')
7+
8+
def lambda_handler(event, context):
9+
10+
# Get Current Region
11+
aws_region = os.getenv('AWS_REGION')
12+
13+
# Determine Which Instances To SnapShot
14+
instances = ec.describe_instances(
15+
Filters=[
16+
{ 'Name': 'tag:Backup', 'Values': ['Yes'] },
17+
]
18+
).get(
19+
'Reservations', []
20+
)[0]['Instances']
21+
22+
print "Found %d instances that need backing up" % len(instances)
23+
24+
# Iterate Over Each Instance & SnapShot Volumes Not Explicitly Excluded From Backups
25+
for instance in instances:
26+
27+
# Determine Retention Period Based Upon Tags
28+
retention_days = 7
29+
destination_region = None
30+
instance_name = ""
31+
for tag in instance['Tags']:
32+
if tag['Key'] == 'RetentionDays' and tag['Value'] > 0:
33+
retention_days = int(tag['Value'])
34+
35+
if tag['Key'] == 'DestinationRegion' and len(tag['Value']) > 0:
36+
destination_region = tag['Value']
37+
38+
if tag['Key'] == 'Name' and len(tag['Value']) > 0:
39+
instance_name = tag['Value']
40+
41+
print "Setting SnapShot retention period To %s days" % (retention_days)
42+
43+
# Determine When We're Going To Delete This SnapShot
44+
delete_date = datetime.date.today() + datetime.timedelta(days=retention_days)
45+
delete_fmt = delete_date.strftime('%Y-%m-%d')
46+
47+
# Set Default SnapShot Tags
48+
snapshot_tags = [
49+
{ 'Key': 'DeleteOn', 'Value': delete_fmt },
50+
{ 'Key': 'Type', 'Value': 'Automated' },
51+
]
52+
53+
# If We Want To Offsite This SnapShot, Set The Appropriate Tag
54+
if destination_region != None:
55+
snapshot_tags = snapshot_tags + [{ 'Key': 'DestinationRegion', 'Value': destination_region }]
56+
57+
# List All Volumes Attached To The Instance
58+
for dev in instance['BlockDeviceMappings']:
59+
60+
# Set Variable Defaults
61+
snapshot_required = True
62+
volume_name = None
63+
64+
if dev.get('Ebs', None) is None:
65+
continue
66+
vol_id = dev['Ebs']['VolumeId']
67+
dev_name = dev['DeviceName']
68+
69+
# Get a Volume Object Based Upon Volume ID
70+
volume = ec.describe_volumes(
71+
VolumeIds=[vol_id,]
72+
)['Volumes'][0]
73+
74+
# Set Default SnapShot Description
75+
description = '%s - %s (%s)' % (
76+
instance_name,
77+
vol_id,
78+
dev_name
79+
)
80+
81+
if 'Tags' in volume:
82+
for tag in volume['Tags']:
83+
84+
# Determine If Volume Has 'Backup' Flag Set To 'No' & Exclude From SnapShot If It Does
85+
if tag['Key'] == 'Backup' and tag['Value'] == 'No':
86+
snapshot_required = False
87+
88+
# Override Default Description With Volume Name If One Specified
89+
if tag['Key'] == 'Name':
90+
description = tag['Value']
91+
92+
93+
# We Don't Want To SnapShot Any Volume Explictly Excluded
94+
if snapshot_required == False:
95+
print "\tIgnoring EBS volume %s (%s) on instance %s - 'Backup' Tag set to 'No'" % (
96+
vol_id,
97+
dev_name,
98+
instance['InstanceId']
99+
)
100+
101+
continue
102+
103+
104+
print "\tFound EBS volume %s (%s) on instance %s - Proceeding with SnapShot" % (
105+
vol_id,
106+
dev_name,
107+
instance['InstanceId']
108+
)
109+
110+
# Take SnapShot Of Volume
111+
snap = ec.create_snapshot(
112+
VolumeId=vol_id,
113+
Description=description
114+
)
115+
116+
if not (snap):
117+
print "\t\tSnapShot operation failed!"
118+
continue
119+
120+
print "\t\tSnapshot %s created in %s of [%s]" % (
121+
snap['SnapshotId'],
122+
aws_region,
123+
description
124+
)
125+
126+
print "\t\tRetaining snapshot %s of volume %s from instance %s (%s) for %d days" % (
127+
snap['SnapshotId'],
128+
vol_id,
129+
instance['InstanceId'],
130+
instance_name,
131+
retention_days,
132+
)
133+
134+
# Tag The SnapShot To Facilitate Later Automated Deletion & Offsiting
135+
ec.create_tags(
136+
Resources=[snap['SnapshotId']],
137+
Tags=snapshot_tags
138+
)

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