Create a script that is executed only when necessary:

1. To create the script, run the following command:

   $ vim /opt/bootscript.sh

2. Insert the following content for the script in the text editor:

   #!/usr/bin/bash
   if [ ! -f /var/setup_vm ]; then
       curl 169.254.169.254/latest/user-data | bash
   fi

Ensure that this script will be executed as a service using the following command:

1. To create the boot setup script, run the following command:

   $ vim /usr/lib/systemd/system/setup_boot.service

2. Insert the following content for the script in the text editor:

   [Unit]
   Description=Execute user-datas to setup the machine
   After=network-online.target
   [Service]
   Type=oneshot
   RemainAfterExit=no
   ExecStart=/usr/bin/bash /opt/bootscript.sh
   [Install]
   WantedBy=multi-user.target

Enable the service using the following command:

$ systemctl enable setup_boot.service

Stop the instance and create an OMI from it. For more information, see Creating an OMI from an Instance.

With Boto2, create an instance using the previously created OMI:

from boto.ec2.regioninfo import EC2RegionInfo
from boto.vpc import VPCConnection
 
your_ak, your_sk = "XXXXXAAAXXXXXX", "ZZZZZZBBBBBBZZZZZZBBBBBBBZZZZZZZ"
outscale_endpoint = EC2RegionInfo(endpoint="fcu.eu-west-2.outscale.com")    # you can change the region
outscale_fcu = VPCConnection( aws_access_key_id = your_ak, aws_secret_access_key = your_sk, region = outscale_endpoint)

userdatas = '''
	#!/usr/bin/bash
	yum install python supervisor -y
	wget http://public.osu.eu-west-2.outscale.com/package.tar.gz
	tar -xvf package.tar.gz
	mv package/* /root/
	pip install -r /root/requirements.txt
	mv /root/supervisord.conf /etc/supervisord.conf
	systemctl start supervisord
	touch /var/setup_vm
	'''
resa = outscale_fcu.run_instances(image_id=<you_new_omi>, key_name=keypair, instance_type='t2.medium', userdata=userdatas)
print resa.instances[0].ip_address

You can now connect to your instance and enjoy your brand-new webserver.