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#!/usr/bin/env python
# Copyright (c) 2009 Chris Moyer http://coredumped.org/
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish, dis-
# tribute, sublicense, and/or sell copies of the Software, and to permit
# persons to whom the Software is furnished to do so, subject to the fol-
# lowing conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
#
# Utility to launch an EC2 Instance
#
VERSION="0.2"
CLOUD_INIT_SCRIPT = """#!/usr/bin/env python
f = open("/etc/boto.cfg", "w")
f.write(\"\"\"%s\"\"\")
f.close()
"""
import boto.pyami.config
import boto.utils
import re, os
import ConfigParser
class Config(boto.pyami.config.Config):
"""A special config class that also adds import abilities
Directly in the config file. To have a config file import
another config file, simply use "#import <path>" where <path>
is either a relative path or a full URL to another config
"""
def __init__(self):
ConfigParser.SafeConfigParser.__init__(self, {'working_dir' : '/mnt/pyami', 'debug' : '0'})
def add_config(self, file_url):
"""Add a config file to this configuration
:param file_url: URL for the file to add, or a local path
:type file_url: str
"""
if not re.match("^([a-zA-Z0-9]*:\/\/)(.*)", file_url):
if not file_url.startswith("/"):
file_url = os.path.join(os.getcwd(), file_url)
file_url = "file://%s" % file_url
(base_url, file_name) = file_url.rsplit("/", 1)
base_config = boto.utils.fetch_file(file_url)
base_config.seek(0)
for line in base_config.readlines():
match = re.match("^#import[\s\t]*([^\s^\t]*)[\s\t]*$", line)
if match:
self.add_config("%s/%s" % (base_url, match.group(1)))
base_config.seek(0)
self.readfp(base_config)
def add_creds(self, ec2):
"""Add the credentials to this config if they don't already exist"""
if not self.has_section('Credentials'):
self.add_section('Credentials')
self.set('Credentials', 'aws_access_key_id', ec2.aws_access_key_id)
self.set('Credentials', 'aws_secret_access_key', ec2.aws_secret_access_key)
def __str__(self):
"""Get config as string"""
from StringIO import StringIO
s = StringIO()
self.write(s)
return s.getvalue()
SCRIPTS = []
def scripts_callback(option, opt, value, parser):
arg = value.split(',')
if len(arg) == 1:
SCRIPTS.append(arg[0])
else:
SCRIPTS.extend(arg)
setattr(parser.values, option.dest, SCRIPTS)
def add_script(scr_url):
"""Read a script and any scripts that are added using #import"""
base_url = '/'.join(scr_url.split('/')[:-1]) + '/'
script_raw = boto.utils.fetch_file(scr_url)
script_content = ''
for line in script_raw.readlines():
match = re.match("^#import[\s\t]*([^\s^\t]*)[\s\t]*$", line)
#if there is an import
if match:
#Read the other script and put it in that spot
script_content += add_script("%s/%s" % (base_url, match.group(1)))
else:
#Otherwise, add the line and move on
script_content += line
return script_content
if __name__ == "__main__":
try:
import readline
except ImportError:
pass
import sys
import time
import boto
from boto.ec2 import regions
from optparse import OptionParser
from boto.mashups.iobject import IObject
parser = OptionParser(version=VERSION, usage="%prog [options] config_url")
parser.add_option("-c", "--max-count", help="Maximum number of this type of instance to launch", dest="max_count", default="1")
parser.add_option("--min-count", help="Minimum number of this type of instance to launch", dest="min_count", default="1")
parser.add_option("--cloud-init", help="Indicates that this is an instance that uses 'CloudInit', Ubuntu's cloud bootstrap process. This wraps the config in a shell script command instead of just passing it in directly", dest="cloud_init", default=False, action="store_true")
parser.add_option("-g", "--groups", help="Security Groups to add this instance to", action="append", dest="groups")
parser.add_option("-a", "--ami", help="AMI to launch", dest="ami_id")
parser.add_option("-t", "--type", help="Type of Instance (default m1.small)", dest="type", default="m1.small")
parser.add_option("-k", "--key", help="Keypair", dest="key_name")
parser.add_option("-z", "--zone", help="Zone (default us-east-1a)", dest="zone", default="us-east-1a")
parser.add_option("-r", "--region", help="Region (default us-east-1)", dest="region", default="us-east-1")
parser.add_option("-i", "--ip", help="Elastic IP", dest="elastic_ip")
parser.add_option("-n", "--no-add-cred", help="Don't add a credentials section", default=False, action="store_true", dest="nocred")
parser.add_option("--save-ebs", help="Save the EBS volume on shutdown, instead of deleting it", default=False, action="store_true", dest="save_ebs")
parser.add_option("-w", "--wait", help="Wait until instance is running", default=False, action="store_true", dest="wait")
parser.add_option("-d", "--dns", help="Returns public and private DNS (implicates --wait)", default=False, action="store_true", dest="dns")
parser.add_option("-T", "--tag", help="Set tag", default=None, action="append", dest="tags", metavar="key:value")
parser.add_option("-s", "--scripts", help="Pass in a script or a folder containing scripts to be run when the instance starts up, assumes cloud-init. Specify scripts in a list specified by commas. If multiple scripts are specified, they are run lexically (A good way to ensure they run in the order is to prefix filenames with numbers)", type='string', action="callback", callback=scripts_callback)
(options, args) = parser.parse_args()
if len(args) < 1:
parser.print_help()
sys.exit(1)
file_url = os.path.expanduser(args[0])
cfg = Config()
cfg.add_config(file_url)
for r in regions():
if r.name == options.region:
region = r
break
else:
print "Region %s not found." % options.region
sys.exit(1)
ec2 = boto.connect_ec2(region=region)
if not options.nocred:
cfg.add_creds(ec2)
iobj = IObject()
if options.ami_id:
ami = ec2.get_image(options.ami_id)
else:
ami_id = options.ami_id
l = [(a, a.id, a.location) for a in ec2.get_all_images()]
ami = iobj.choose_from_list(l, prompt='Choose AMI')
if options.key_name:
key_name = options.key_name
else:
l = [(k, k.name, '') for k in ec2.get_all_key_pairs()]
key_name = iobj.choose_from_list(l, prompt='Choose Keypair').name
if options.groups:
groups = options.groups
else:
groups = []
l = [(g, g.name, g.description) for g in ec2.get_all_security_groups()]
g = iobj.choose_from_list(l, prompt='Choose Primary Security Group')
while g != None:
groups.append(g)
l.remove((g, g.name, g.description))
g = iobj.choose_from_list(l, prompt='Choose Additional Security Group (0 to quit)')
user_data = str(cfg)
# If it's a cloud init AMI,
# then we need to wrap the config in our
# little wrapper shell script
if options.cloud_init:
user_data = CLOUD_INIT_SCRIPT % user_data
scriptuples = []
if options.scripts:
scripts = options.scripts
scriptuples.append(('user_data', user_data))
for scr in scripts:
scr_url = scr
if not re.match("^([a-zA-Z0-9]*:\/\/)(.*)", scr_url):
if not scr_url.startswith("/"):
scr_url = os.path.join(os.getcwd(), scr_url)
try:
newfiles = os.listdir(scr_url)
for f in newfiles:
#put the scripts in the folder in the array such that they run in the correct order
scripts.insert(scripts.index(scr) + 1, scr.split("/")[-1] + "/" + f)
except OSError:
scr_url = "file://%s" % scr_url
try:
scriptuples.append((scr, add_script(scr_url)))
except Exception, e:
pass
user_data = boto.utils.write_mime_multipart(scriptuples, compress=True)
shutdown_proc = "terminate"
if options.save_ebs:
shutdown_proc = "save"
r = ami.run(min_count=int(options.min_count), max_count=int(options.max_count),
key_name=key_name, user_data=user_data,
security_groups=groups, instance_type=options.type,
placement=options.zone, instance_initiated_shutdown_behavior=shutdown_proc)
instance = r.instances[0]
if options.tags:
for tag_pair in options.tags:
name = tag_pair
value = ''
if ':' in tag_pair:
name, value = tag_pair.split(':', 1)
instance.add_tag(name, value)
if options.dns:
options.wait = True
if not options.wait:
sys.exit(0)
while True:
instance.update()
if instance.state == 'running':
break
time.sleep(3)
if options.dns:
print "Public DNS name: %s" % instance.public_dns_name
print "Private DNS name: %s" % instance.private_dns_name
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