ansible/cloud/rax_cdb

#!/usr/bin/python -tt
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.

DOCUMENTATION = '''
---
module: rax_cdb
short_description: create / delete or resize a Rackspace Cloud Databases instance
description:
  - creates / deletes or resize a Rackspace Cloud Databases instance
    and optionally waits for it to be 'running'. The name option needs to be unique since
    it's used to identify the instance.
version_added: "1.8"
options:
  api_key:
    description:
      - Rackspace API key (overrides I(credentials))
    aliases:
      - password
  credentials:
    description:
      - File to find the Rackspace credentials in (ignored if I(api_key) and
        I(username) are provided)
    default: null
    aliases:
      - creds_file
  region:
    description:
      - Region to create an instance in
    default: DFW
  username:
    description:
      - Rackspace username (overrides I(credentials))
  name:
    description:
      - Name of the databases server instance
    default: null
  flavor:
    description:
      - flavor to use for the instance 1 to 6 (i.e. 512MB to 16GB)
    default: 1
  volume:
    description:
      - Volume size of the database 1-150GB
    default: 2
  state:
    description:
      - Indicate desired state of the resource
    choices: ['present', 'absent']
    default: present
  wait:
    description:
      - wait for the instance to be in state 'running' before returning
    default: "no"
    choices: [ "yes", "no" ]
  wait_timeout:
    description:
      - how long before wait gives up, in seconds
    default: 300
requirements: [ "pyrax" ]
author: Simon JAILLET
notes:
  - The following environment variables can be used, C(RAX_USERNAME),
    C(RAX_API_KEY), C(RAX_CREDS_FILE), C(RAX_CREDENTIALS), C(RAX_REGION).
  - C(RAX_CREDENTIALS) and C(RAX_CREDS_FILE) points to a credentials file
    appropriate for pyrax. See U(https://github.com/rackspace/pyrax/blob/master/docs/getting_started.md#authenticating)
  - C(RAX_USERNAME) and C(RAX_API_KEY) obviate the use of a credentials file
  - C(RAX_REGION) defines a Rackspace Public Cloud region (DFW, ORD, LON, ...)
'''

EXAMPLES = '''
- name: Build a Cloud Databases
  gather_facts: False
  tasks:
    - name: Server build request
      local_action:
        module: rax_cdb
        credentials: ~/.raxpub
        region: IAD
        name: db-server1
        flavor: 1
        volume: 2
        wait: yes
        state: present
      register: rax_db_server
'''

import sys
from types import NoneType

try:
    import pyrax
except ImportError:
    print("failed=True msg='pyrax is required for this module'")
    sys.exit(1)

NON_CALLABLES = (basestring, bool, dict, int, list, NoneType)


def to_dict(obj):
    instance = {}
    for key in dir(obj):
        value = getattr(obj, key)
        if (isinstance(value, NON_CALLABLES) and not key.startswith('_')):
            instance[key] = value
    return instance


def find_instance(name):

    cdb = pyrax.cloud_databases
    instances = cdb.list()
    if instances:
        for instance in instances:
            if instance.name == name:
                return instance
    return False


def save_instance(module, name, flavor, volume, wait, wait_timeout):

    for arg, value in dict(name=name, flavor=flavor,
                           volume=volume).iteritems():
        if not value:
            module.fail_json(msg='%s is required for the "rax_cdb"'
                                 ' module' % arg)

    if not (volume >= 1 and volume <= 150):
        module.fail_json(msg='volume is required to be between 1 and 150')

    cdb = pyrax.cloud_databases

    flavors = []
    for item in cdb.list_flavors():
        flavors.append(item.id)

    if not (flavor in flavors):
        module.fail_json(msg='unexisting flavor reference "%s"' % str(flavor))

    changed = False

    instance = find_instance(name)

    if not instance:
        action = 'create'
        try:
            instance = cdb.create(name=name, flavor=flavor, volume=volume)
        except Exception, e:
            module.fail_json(msg='%s' % e.message)
        else:
            changed = True

    else:
        action = None

        if instance.volume.size != volume:
            action = 'resize'
            if instance.volume.size > volume:
                module.fail_json(
                    changed=False,
                    action=action,
                    msg='The new volume size must be larger than the'
                        ' current volume size',
                    cdb=to_dict(instance)
                )
            instance.resize_volume(volume)
            changed = True

        if int(instance.flavor.id) != flavor:
            action = 'resize'
            pyrax.utils.wait_until(
                instance,
                'status',
                'ACTIVE',
                attempts=wait_timeout
            )
            instance.resize(flavor)
            changed = True

    if wait:
        pyrax.utils.wait_until(
            instance,
            'status',
            'ACTIVE',
            attempts=wait_timeout
        )

    if wait and instance.status != 'ACTIVE':
        module.fail_json(
          changed=changed,
          action=action,
          cdb=to_dict(instance),
          msg='Timeout waiting for "%s" databases instance to be '
              'created' % name
        )

    module.exit_json(changed=changed, action=action, cdb=to_dict(instance))


def delete_instance(module, name, wait, wait_timeout):

    if not name:
        module.fail_json(msg='name is required for the "rax_cdb" module')

    changed = False

    instance = find_instance(name)
    if not instance:
        module.exit_json(changed=False, action='delete')

    try:
        instance.delete()
    except Exception, e:
        module.fail_json(msg='%s' % e.message)
    else:
        changed = True

    if wait:
        pyrax.utils.wait_until(
            instance,
            'status',
            'SHUTDOWN',
            attempts=wait_timeout
        )

    if wait and instance.status != 'SHUTDOWN':
        module.fail_json(
          changed=changed,
          action='delete',
          cdb=to_dict(instance),
          msg='Timeout waiting for "%s" databases instance to be '
              'deleted' % name
        )

    module.exit_json(changed=changed, action='delete', cdb=to_dict(instance))


def rax_cdb(module, state, name, flavor, volume, wait, wait_timeout):

    # act on the state
    if state == 'present':
        save_instance(module, name, flavor, volume, wait, wait_timeout)
    elif state == 'absent':
        delete_instance(module, name, wait, wait_timeout)


def main():
    argument_spec = rax_argument_spec()
    argument_spec.update(
        dict(
            name=dict(type='str', required=True),
            flavor=dict(type='int', default=1),
            volume=dict(type='int', default=2),
            state=dict(default='present', choices=['present', 'absent']),
            wait=dict(type='bool', default=False),
            wait_timeout=dict(type='int', default=300),
        )
    )

    module = AnsibleModule(
        argument_spec=argument_spec,
        required_together=rax_required_together(),
    )

    name = module.params.get('name')
    flavor = module.params.get('flavor')
    volume = module.params.get('volume')
    state = module.params.get('state')
    wait = module.params.get('wait')
    wait_timeout = module.params.get('wait_timeout')

    setup_rax_module(module, pyrax)
    rax_cdb(module, state, name, flavor, volume, wait, wait_timeout)


# import module snippets
from ansible.module_utils.basic import *
from ansible.module_utils.rax import *

### invoke the module
main()