Issue
I'm trying to write a script using boto3 to start an instance and wait until it is started. As per the documentation of wait_until_running, it should wait until the instance is fully started (I"m assuming checks should be OK) but unfortunately it only works for wait_until_stopped and incase of wait_until_running it just starts the instance and doesn't wait until it is completely started. Not sure if I'm doing something wrong here or this is a bug of boto3.
Here is the code:
import boto3
ec2 = boto3.resource('ec2',region_name="ap-southeast-2")
ec2_id = 'i-xxxxxxxx'
instance = ec2.Instance(id=ec2_id)
print("starting instance " + ec2_id)
instance.start()
instance.wait_until_running()
print("instance started")
Solution
Thanks to @Mark B @Madhurya Gandi here is the solution that worked in my case:
import boto3,socket
retries = 10
retry_delay=10
retry_count = 0
ec2 = boto3.resource('ec2',region_name="ap-southeast-2")
ec2_id = 'i-xxxxxxxx'
instance = ec2.Instance(id=ec2_id)
print("starting instance " + ec2_id)
instance.start()
instance.wait_until_running()
while retry_count <= retries:
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
result = sock.connect_ex((instance.public_ip_address,22))
if result == 0:
Print "Instance is UP & accessible on port 22, the IP address is: ",instance.public_ip_address
break
else:
print "instance is still down retrying . . . "
time.sleep(retry_delay)
except ClientError as e:
print('Error', e)
Answered By - kolaman
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