New module: ec2_ubuntu_ami
This module will retrieve the AMI of the most recent official Ubuntu EC2 image for a given Ubuntu release.
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Lorin Hochstein
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cloud/ec2_ubuntu_ami
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cloud/ec2_ubuntu_ami
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#!/usr/bin/python
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#
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# (c) 2013, Nimbis Services
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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DOCUMENTATION = '''
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---
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module: ec2_ubuntu_ami
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short_description: Retrieve AWS AMIs for official Ubuntu images
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description:
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- The Ubuntu project maintains a list of the latest version of Ubuntu images on EC2 accessible via http.
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- This module retrieves the AMI for a given Ubuntu release by making an http query against the appropriate cloud-images.ubuntu.com url and parsing the output.
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- For example: https://cloud-images.ubuntu.com/query/precise/server/released.current.txt has information about Ubuntu 12.04 (precise pangolin) release, server edition.
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- Returns C(ami), C(aki), C(ari), C(serial), C(tag)
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- If there is no AKI or ARI associated with an image, these will be C(null).
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- Example output: C({"ami": "ami-69f5a900", "changed": false, "aki": "aki-88aa75e1", "tag": "release", "ari": null, "serial": "20131024"})
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options:
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release:
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description: short name of the release (e.g., C(precise))
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required: true
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stream:
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description: Type of release.
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required: false
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default: "server"
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choices: ["server", "desktop"]
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store:
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description: Back-end store for instance
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required: false
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default: "ebs"
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choices: ["ebs", "instance-store"]
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arch:
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description: CPU architecture
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required: false
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default: "amd64"
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choices: ["i386", "amd64"]
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region:
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description: EC2 region
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required: false
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default: us-east-1
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choices: ["ap-northeast-1", "ap-southeast-1", "ap-southeast-2",
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"eu-west-1", "sa-east-1", "us-east-1", "us-west-1", "us-west-2"]
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virt:
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description: virutalization type
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required: false
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default: paravirtual
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choices: ["paravirtual", "hvm"]
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author: Lorin Hochstein
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'''
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EXAMPLES = '''
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- name: Lauch an Ubuntu 12.04 (Precise Pangolin) EC2 instance
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hosts: 127.0.0.1
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connection: local
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tasks:
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- name: Get the Ubuntu precise AMI
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ec2_ubuntu_ami: release=precise region=us-west-1 store=instance-store
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register: ubuntu_image
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- name: Start the EC2 instance
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ec2: image={{ ubuntu_image.ami }} instance_type=m1.small key_name=mykey
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'''
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import csv
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import json
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import urllib2
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import urlparse
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AWS_REGIONS = ['ap-northeast-1',
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'ap-southeast-1',
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'ap-southeast-2',
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'eu-west-1',
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'sa-east-1',
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'us-east-1',
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'us-west-1',
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'us-west-2']
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def get_url(module, url):
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""" Get url and return response """
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try:
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r = urllib2.urlopen(url)
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except (urllib2.HTTPError, urllib2.URLError), e:
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code = getattr(e, 'code', -1)
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module.fail_json(msg="Request failed: %s" % str(e), status_code=code)
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return r
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def get_ami(table, release, stream, store,
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arch, region, virt):
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""" Get the Ubuntu AMI that matches query given a table of AMIs
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table: an iterable that returns a row of
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(release, stream, tag, serial, region, ami, aki, ari, virt)
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release: ubuntu release name
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stream: 'server' or 'desktop'
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store: 'ebs' or 'instance-store'
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arch: 'i386' or 'amd64'
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region: EC2 region
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virt: 'paravirtual' or 'hvm'
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Returns (ami, aki, ari, tag, serial)"""
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expected = (release, stream, store, arch, region, virt)
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for row in table:
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(actual_release, actual_stream, tag, serial,
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actual_store, actual_arch, actual_region, ami, aki, ari,
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actual_virt) = row
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actual = (actual_release, actual_stream, actual_store, actual_arch,
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actual_region, actual_virt)
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if actual == expected:
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# aki and ari are sometimes blank
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if aki == '':
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aki = None
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if ari == '':
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ari = None
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return (ami, aki, ari, tag, serial)
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raise KeyError()
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def get_ubuntu_url(release, stream):
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url = "https://cloud-images.ubuntu.com/query/%s/%s/released.current.txt"
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return url % (release, stream)
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def main():
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arg_spec = dict(
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release=dict(required=True),
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stream=dict(required=False, default='server',
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choices=['desktop', 'server']),
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store=dict(required=False, default='ebs',
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choices=['ebs', 'instance-store']),
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arch=dict(required=False, default='amd64',
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choices=['i386', 'amd64']),
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region=dict(required=False, default='us-east-1', choices=AWS_REGIONS),
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virt=dict(required=False, default='paravirtual',
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choices=['paravirtual', 'hvm'])
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)
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module = AnsibleModule(argument_spec=arg_spec)
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release = module.params['release']
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stream = module.params['stream']
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store = module.params['store']
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arch = module.params['arch']
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region = module.params['region']
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virt = module.params['virt']
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url = get_ubuntu_url(release, stream)
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req = get_url(module, url)
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reader = csv.reader(req, delimiter='\t')
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try:
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ami, aki, ari, tag, serial = get_ami(reader, release, stream, store,
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arch, region, virt)
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module.exit_json(changed=False, ami=ami, aki=aki, ari=ari, tag=tag,
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serial=serial)
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except KeyError:
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module.fail_json(msg="No matching AMI found")
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# this is magic, see lib/ansible/module_common.py
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#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
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if __name__ == '__main__':
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main()
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