How to create Start instance lambda function in aws using python? - amazon-web-services

Question

When trying to create a function lambda in AWS in order to start instance automatically, this is the function:
import boto3
region = 'us-east-1'
instances = ['i-xxx']
ec2 = boto3.client('ec2', region_name=region)
def lambda_handler(event, context):
ec2.stop_instances(InstanceIds=instances)
print('stopped your instances: ' + str(instances))
and after Save and Test - I got this error:
Response:
{
"errorMessage": "2019-09-15T09:54:06.364Z 372c2df4-1303-4326-b882-a04154007881 Task timed out after 3.00 seconds"
}
Request ID:
"372c2df4-1303-4326-b882-a04154007881"
Function Logs:
START RequestId: 372c2df4-1303-4326-b882-a04154007881 Version: $LATEST
END RequestId: 372c2df4-1303-4326-b882-a04154007881
REPORT RequestId: 372c2df4-1303-4326-b882-a04154007881 Duration: 3003.17 ms Billed Duration: 3000 ms Memory Size: 128 MB Max Memory Used: 81 MB Init Duration: 115.73 ms
XRAY TraceId: 1-5d7e0a3b-79a0391249fcda644105b8ba SegmentId: 0eefbaed756a35c4 Sampled: false
2019-09-15T09:54:06.364Z 372c2df4-1303-4326-b882-a04154007881 Task timed out after 3.00 seconds

Answer 1

Check if you have set the aws lambda timeout to some appropriate value, because it seems to be on the default value which is 3 sec and looks like it not going to be sufficient for you.
Timeout – The amount of time that Lambda allows a function to run before stopping it. The default is 3 seconds. The maximum allowed value is 900 seconds.aws docs
To start and stop the instance boto3 docs
import sys
import boto3
from botocore.exceptions import ClientError
instance_id = sys.argv[2]
action = sys.argv[1].upper()
ec2 = boto3.client('ec2')
if action == 'ON':
# Do a dryrun first to verify permissions
try:
ec2.start_instances(InstanceIds=[instance_id], DryRun=True)
except ClientError as e:
if 'DryRunOperation' not in str(e):
raise
# Dry run succeeded, run start_instances without dryrun
try:
response = ec2.start_instances(InstanceIds=[instance_id], DryRun=False)
print(response)
except ClientError as e:
print(e)
else:
# Do a dryrun first to verify permissions
try:
ec2.stop_instances(InstanceIds=[instance_id], DryRun=True)
except ClientError as e:
if 'DryRunOperation' not in str(e):
raise
# Dry run succeeded, call stop_instances without dryrun
try:
response = ec2.stop_instances(InstanceIds=[instance_id], DryRun=False)
print(response)
except ClientError as e:
print(e)