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Viewing changes to charmhelpers/contrib/openstack/flex.py

  • Committer: Chuck Short
  • Date: 2014-09-23 16:56:05 UTC
  • Revision ID: zulcss@ubuntu.com-20140923165605-0zofi1u1lz57u5b9
Add flex support for openstack

Add the flex containers support for openstack.

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charmhelpers/contrib/openstack/flex.py
 
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#
 
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# Copyright 2014 Canonical Ltd.
 
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#
 
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# Authors:
 
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#  Chuck Short <zulcss@ubuntu.com>
 
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import os
 
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import shutil
 
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from subprocess import (
 
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    check_call,
 
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    check_output,
 
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    CalledProcessError
 
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)
 
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from charmhelpers.core.hookenv import (
 
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    config,
 
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    relation_get,
 
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    relation_ids,
 
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    related_units,
 
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    log,
 
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    INFO,
 
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    WARNING,
 
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    ERROR
 
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)
 
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from charmhelpers.core.host import (
 
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    mount,
 
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    mounts,
 
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    service_start,
 
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    service_stop,
 
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    service_running,
 
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    umount,
 
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)
 
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from charmhelpers.fetch import (
 
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    apt_install,
 
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    apt_update,
 
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)
 
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def configure_ppa():
 
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    cmd = [
 
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        'apt-add-repository',
 
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        '-y', 
 
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        'ppa:zulcss/flex-testing'
 
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    ]
 
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    check_call(cmd)
 
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    apt_update()
 
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def install_flex():
 
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    log('Configuring flex')
 
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    # This can be removed once in the archive
 
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    configure_ppa()
 
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def configure_flex():
 
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    flex_block_device = config('flex-block-device')
 
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    flex_mount_point = config('flex-mount-point')
 
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    instance_path = '/var/lib/nova/instances'
 
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    if config('instances-path') is not None:
 
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        instance_path = config('instances-path')
 
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    # configure the btrfs block device
 
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    apt_install('btrfs-tools', fatal=True)
 
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    if filesystem_mounted(flex_mount_point):
 
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        umount(flex_mount_point)
 
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    make_filesystem(flex_block_device)
 
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    mount(flex_block_device, instance_path, persist=True)
 
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    cmd = ['chown', 'nova:nova', instance_path]
 
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    check_call(cmd)
 
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    configure_flex_user()
 
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    cmd = ['chmod', '+x', instance_path]
 
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    check_call(cmd)
 
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    service_start('nova-compute')
 
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def configure_flex_user():
 
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     cmd = ['usermod', '--add-subuids', '100000-165536', 'nova']
 
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     check_call(cmd)
 
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     cmd = ['usermod', '--add-subgids', '100000-165536', 'nova']
 
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     check_call(cmd)
 
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def filesystem_mounted(fs):
 
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    return fs in [f for f, m in mounts()]
 
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def make_filesystem(blk_device, timeout=10):
 
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    count = 0
 
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    e_noent = os.errno.ENOENT
 
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    while not os.path.exists(blk_device):
 
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        if count >= timeout:
 
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            log('gave up waiting on block device %s' % blk_device,
 
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                level=ERROR)
 
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            raise IOError(e_noent, os.strerror(e_noent), blk_device)
 
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        log('waiting for block device %s to appear' % blk_device,
 
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            level=INFO)
 
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        count += 1
 
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        time.sleep(1)
 
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    else:
 
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        log('Formatting block device %s.' % blk_device, level=INFO)
 
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        check_call(['mkfs.btrfs', '-f', blk_device])
 
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