Python charmhelpers.core.host 模块，mount() 实例源码

def test_mounts_and_persist_a_device(self, log, check_output, fstab):
        """Check if a mount works with the persist flag set to True
        """
        device = '/dev/guido'
        mountpoint = '/mnt/guido'
        options = 'foo,bar'

        result = host.mount(device, mountpoint, options, persist=True)

        self.assertTrue(result)
        check_output.assert_called_with(['mount', '-o', 'foo,bar',
                                         '/dev/guido', '/mnt/guido'])

        fstab.add.assert_called_with('/dev/guido', '/mnt/guido', 'ext3',
                                     options='foo,bar')

        result = host.mount(device, mountpoint, options, persist=True,
                            filesystem="xfs")

        self.assertTrue(result)
        fstab.add.assert_called_with('/dev/guido', '/mnt/guido', 'xfs',
                                     options='foo,bar')

def mount_volume(config):
    if os.path.exists(config['mountpoint']):
        if not os.path.isdir(config['mountpoint']):
            hookenv.log('Not a directory: {}'.format(config['mountpoint']))
            raise VolumeConfigurationError()
    else:
        host.mkdir(config['mountpoint'])
    if os.path.ismount(config['mountpoint']):
        unmount_volume(config)
    if not host.mount(config['device'], config['mountpoint'], persist=True):
        raise VolumeConfigurationError()

def managed_mounts():
    '''List of all mounted managed volumes'''
    return filter(lambda mount: mount[0].startswith(MOUNT_BASE), host.mounts())

def configure_volume(before_change=lambda: None, after_change=lambda: None):
    '''Set up storage (or don't) according to the charm's volume configuration.
       Returns the mount point or "ephemeral". before_change and after_change
       are optional functions to be called if the volume configuration changes.
    '''

    config = get_config()
    if not config:
        hookenv.log('Failed to read volume configuration', hookenv.CRITICAL)
        raise VolumeConfigurationError()

    if config['ephemeral']:
        if os.path.ismount(config['mountpoint']):
            before_change()
            unmount_volume(config)
            after_change()
        return 'ephemeral'
    else:
        # persistent storage
        if os.path.ismount(config['mountpoint']):
            mounts = dict(managed_mounts())
            if mounts.get(config['mountpoint']) != config['device']:
                before_change()
                unmount_volume(config)
                mount_volume(config)
                after_change()
        else:
            before_change()
            mount_volume(config)
            after_change()
        return config['mountpoint']

def mount_volume(config):
    if os.path.exists(config['mountpoint']):
        if not os.path.isdir(config['mountpoint']):
            hookenv.log('Not a directory: {}'.format(config['mountpoint']))
            raise VolumeConfigurationError()
    else:
        host.mkdir(config['mountpoint'])
    if os.path.ismount(config['mountpoint']):
        unmount_volume(config)
    if not host.mount(config['device'], config['mountpoint'], persist=True):
        raise VolumeConfigurationError()

def managed_mounts():
    '''List of all mounted managed volumes'''
    return filter(lambda mount: mount[0].startswith(MOUNT_BASE), host.mounts())

def configure_volume(before_change=lambda: None, after_change=lambda: None):
    '''Set up storage (or don't) according to the charm's volume configuration.
       Returns the mount point or "ephemeral". before_change and after_change
       are optional functions to be called if the volume configuration changes.
    '''

    config = get_config()
    if not config:
        hookenv.log('Failed to read volume configuration', hookenv.CRITICAL)
        raise VolumeConfigurationError()

    if config['ephemeral']:
        if os.path.ismount(config['mountpoint']):
            before_change()
            unmount_volume(config)
            after_change()
        return 'ephemeral'
    else:
        # persistent storage
        if os.path.ismount(config['mountpoint']):
            mounts = dict(managed_mounts())
            if mounts.get(config['mountpoint']) != config['device']:
                before_change()
                unmount_volume(config)
                mount_volume(config)
                after_change()
        else:
            before_change()
            mount_volume(config)
            after_change()
        return config['mountpoint']

def mount_volume(config):
    if os.path.exists(config['mountpoint']):
        if not os.path.isdir(config['mountpoint']):
            hookenv.log('Not a directory: {}'.format(config['mountpoint']))
            raise VolumeConfigurationError()
    else:
        host.mkdir(config['mountpoint'])
    if os.path.ismount(config['mountpoint']):
        unmount_volume(config)
    if not host.mount(config['device'], config['mountpoint'], persist=True):
        raise VolumeConfigurationError()

def managed_mounts():
    '''List of all mounted managed volumes'''
    return filter(lambda mount: mount[0].startswith(MOUNT_BASE), host.mounts())

def mount_volume(config):
    if os.path.exists(config['mountpoint']):
        if not os.path.isdir(config['mountpoint']):
            hookenv.log('Not a directory: {}'.format(config['mountpoint']))
            raise VolumeConfigurationError()
    else:
        host.mkdir(config['mountpoint'])
    if os.path.ismount(config['mountpoint']):
        unmount_volume(config)
    if not host.mount(config['device'], config['mountpoint'], persist=True):
        raise VolumeConfigurationError()

def managed_mounts():
    '''List of all mounted managed volumes'''
    return filter(lambda mount: mount[0].startswith(MOUNT_BASE), host.mounts())

def configure_volume(before_change=lambda: None, after_change=lambda: None):
    '''Set up storage (or don't) according to the charm's volume configuration.
       Returns the mount point or "ephemeral". before_change and after_change
       are optional functions to be called if the volume configuration changes.
    '''

    config = get_config()
    if not config:
        hookenv.log('Failed to read volume configuration', hookenv.CRITICAL)
        raise VolumeConfigurationError()

    if config['ephemeral']:
        if os.path.ismount(config['mountpoint']):
            before_change()
            unmount_volume(config)
            after_change()
        return 'ephemeral'
    else:
        # persistent storage
        if os.path.ismount(config['mountpoint']):
            mounts = dict(managed_mounts())
            if mounts.get(config['mountpoint']) != config['device']:
                before_change()
                unmount_volume(config)
                mount_volume(config)
                after_change()
        else:
            before_change()
            mount_volume(config)
            after_change()
        return config['mountpoint']

def mount_volume(config):
    if os.path.exists(config['mountpoint']):
        if not os.path.isdir(config['mountpoint']):
            hookenv.log('Not a directory: {}'.format(config['mountpoint']))
            raise VolumeConfigurationError()
    else:
        host.mkdir(config['mountpoint'])
    if os.path.ismount(config['mountpoint']):
        unmount_volume(config)
    if not host.mount(config['device'], config['mountpoint'], persist=True):
        raise VolumeConfigurationError()

def managed_mounts():
    '''List of all mounted managed volumes'''
    return filter(lambda mount: mount[0].startswith(MOUNT_BASE), host.mounts())

def mount_volume(config):
    if os.path.exists(config['mountpoint']):
        if not os.path.isdir(config['mountpoint']):
            hookenv.log('Not a directory: {}'.format(config['mountpoint']))
            raise VolumeConfigurationError()
    else:
        host.mkdir(config['mountpoint'])
    if os.path.ismount(config['mountpoint']):
        unmount_volume(config)
    if not host.mount(config['device'], config['mountpoint'], persist=True):
        raise VolumeConfigurationError()

def managed_mounts():
    '''List of all mounted managed volumes'''
    return filter(lambda mount: mount[0].startswith(MOUNT_BASE), host.mounts())

def configure_volume(before_change=lambda: None, after_change=lambda: None):
    '''Set up storage (or don't) according to the charm's volume configuration.
       Returns the mount point or "ephemeral". before_change and after_change
       are optional functions to be called if the volume configuration changes.
    '''

    config = get_config()
    if not config:
        hookenv.log('Failed to read volume configuration', hookenv.CRITICAL)
        raise VolumeConfigurationError()

    if config['ephemeral']:
        if os.path.ismount(config['mountpoint']):
            before_change()
            unmount_volume(config)
            after_change()
        return 'ephemeral'
    else:
        # persistent storage
        if os.path.ismount(config['mountpoint']):
            mounts = dict(managed_mounts())
            if mounts.get(config['mountpoint']) != config['device']:
                before_change()
                unmount_volume(config)
                mount_volume(config)
                after_change()
        else:
            before_change()
            mount_volume(config)
            after_change()
        return config['mountpoint']

def mount_volume(config):
    if os.path.exists(config['mountpoint']):
        if not os.path.isdir(config['mountpoint']):
            hookenv.log('Not a directory: {}'.format(config['mountpoint']))
            raise VolumeConfigurationError()
    else:
        host.mkdir(config['mountpoint'])
    if os.path.ismount(config['mountpoint']):
        unmount_volume(config)
    if not host.mount(config['device'], config['mountpoint'], persist=True):
        raise VolumeConfigurationError()

def managed_mounts():
    '''List of all mounted managed volumes'''
    return filter(lambda mount: mount[0].startswith(MOUNT_BASE), host.mounts())

def configure_volume(before_change=lambda: None, after_change=lambda: None):
    '''Set up storage (or don't) according to the charm's volume configuration.
       Returns the mount point or "ephemeral". before_change and after_change
       are optional functions to be called if the volume configuration changes.
    '''

    config = get_config()
    if not config:
        hookenv.log('Failed to read volume configuration', hookenv.CRITICAL)
        raise VolumeConfigurationError()

    if config['ephemeral']:
        if os.path.ismount(config['mountpoint']):
            before_change()
            unmount_volume(config)
            after_change()
        return 'ephemeral'
    else:
        # persistent storage
        if os.path.ismount(config['mountpoint']):
            mounts = dict(managed_mounts())
            if mounts.get(config['mountpoint']) != config['device']:
                before_change()
                unmount_volume(config)
                mount_volume(config)
                after_change()
        else:
            before_change()
            mount_volume(config)
            after_change()
        return config['mountpoint']

def mount_volume(config):
    if os.path.exists(config['mountpoint']):
        if not os.path.isdir(config['mountpoint']):
            hookenv.log('Not a directory: {}'.format(config['mountpoint']))
            raise VolumeConfigurationError()
    else:
        host.mkdir(config['mountpoint'])
    if os.path.ismount(config['mountpoint']):
        unmount_volume(config)
    if not host.mount(config['device'], config['mountpoint'], persist=True):
        raise VolumeConfigurationError()

def managed_mounts():
    '''List of all mounted managed volumes'''
    return filter(lambda mount: mount[0].startswith(MOUNT_BASE), host.mounts())

def configure_volume(before_change=lambda: None, after_change=lambda: None):
    '''Set up storage (or don't) according to the charm's volume configuration.
       Returns the mount point or "ephemeral". before_change and after_change
       are optional functions to be called if the volume configuration changes.
    '''

    config = get_config()
    if not config:
        hookenv.log('Failed to read volume configuration', hookenv.CRITICAL)
        raise VolumeConfigurationError()

    if config['ephemeral']:
        if os.path.ismount(config['mountpoint']):
            before_change()
            unmount_volume(config)
            after_change()
        return 'ephemeral'
    else:
        # persistent storage
        if os.path.ismount(config['mountpoint']):
            mounts = dict(managed_mounts())
            if mounts.get(config['mountpoint']) != config['device']:
                before_change()
                unmount_volume(config)
                mount_volume(config)
                after_change()
        else:
            before_change()
            mount_volume(config)
            after_change()
        return config['mountpoint']

def mount_volume(config):
    if os.path.exists(config['mountpoint']):
        if not os.path.isdir(config['mountpoint']):
            hookenv.log('Not a directory: {}'.format(config['mountpoint']))
            raise VolumeConfigurationError()
    else:
        host.mkdir(config['mountpoint'])
    if os.path.ismount(config['mountpoint']):
        unmount_volume(config)
    if not host.mount(config['device'], config['mountpoint'], persist=True):
        raise VolumeConfigurationError()

def managed_mounts():
    '''List of all mounted managed volumes'''
    return filter(lambda mount: mount[0].startswith(MOUNT_BASE), host.mounts())

def configure_volume(before_change=lambda: None, after_change=lambda: None):
    '''Set up storage (or don't) according to the charm's volume configuration.
       Returns the mount point or "ephemeral". before_change and after_change
       are optional functions to be called if the volume configuration changes.
    '''

    config = get_config()
    if not config:
        hookenv.log('Failed to read volume configuration', hookenv.CRITICAL)
        raise VolumeConfigurationError()

    if config['ephemeral']:
        if os.path.ismount(config['mountpoint']):
            before_change()
            unmount_volume(config)
            after_change()
        return 'ephemeral'
    else:
        # persistent storage
        if os.path.ismount(config['mountpoint']):
            mounts = dict(managed_mounts())
            if mounts.get(config['mountpoint']) != config['device']:
                before_change()
                unmount_volume(config)
                mount_volume(config)
                after_change()
        else:
            before_change()
            mount_volume(config)
            after_change()
        return config['mountpoint']

def mount_volume(config):
    if os.path.exists(config['mountpoint']):
        if not os.path.isdir(config['mountpoint']):
            hookenv.log('Not a directory: {}'.format(config['mountpoint']))
            raise VolumeConfigurationError()
    else:
        host.mkdir(config['mountpoint'])
    if os.path.ismount(config['mountpoint']):
        unmount_volume(config)
    if not host.mount(config['device'], config['mountpoint'], persist=True):
        raise VolumeConfigurationError()

def managed_mounts():
    '''List of all mounted managed volumes'''
    return filter(lambda mount: mount[0].startswith(MOUNT_BASE), host.mounts())

def mount_volume(config):
    if os.path.exists(config['mountpoint']):
        if not os.path.isdir(config['mountpoint']):
            hookenv.log('Not a directory: {}'.format(config['mountpoint']))
            raise VolumeConfigurationError()
    else:
        host.mkdir(config['mountpoint'])
    if os.path.ismount(config['mountpoint']):
        unmount_volume(config)
    if not host.mount(config['device'], config['mountpoint'], persist=True):
        raise VolumeConfigurationError()

def managed_mounts():
    '''List of all mounted managed volumes'''
    return filter(lambda mount: mount[0].startswith(MOUNT_BASE), host.mounts())

def configure_volume(before_change=lambda: None, after_change=lambda: None):
    '''Set up storage (or don't) according to the charm's volume configuration.
       Returns the mount point or "ephemeral". before_change and after_change
       are optional functions to be called if the volume configuration changes.
    '''

    config = get_config()
    if not config:
        hookenv.log('Failed to read volume configuration', hookenv.CRITICAL)
        raise VolumeConfigurationError()

    if config['ephemeral']:
        if os.path.ismount(config['mountpoint']):
            before_change()
            unmount_volume(config)
            after_change()
        return 'ephemeral'
    else:
        # persistent storage
        if os.path.ismount(config['mountpoint']):
            mounts = dict(managed_mounts())
            if mounts.get(config['mountpoint']) != config['device']:
                before_change()
                unmount_volume(config)
                mount_volume(config)
                after_change()
        else:
            before_change()
            mount_volume(config)
            after_change()
        return config['mountpoint']

def mount_volume(config):
    if os.path.exists(config['mountpoint']):
        if not os.path.isdir(config['mountpoint']):
            hookenv.log('Not a directory: {}'.format(config['mountpoint']))
            raise VolumeConfigurationError()
    else:
        host.mkdir(config['mountpoint'])
    if os.path.ismount(config['mountpoint']):
        unmount_volume(config)
    if not host.mount(config['device'], config['mountpoint'], persist=True):
        raise VolumeConfigurationError()

def managed_mounts():
    '''List of all mounted managed volumes'''
    return filter(lambda mount: mount[0].startswith(MOUNT_BASE), host.mounts())

def mount_volume(config):
    if os.path.exists(config['mountpoint']):
        if not os.path.isdir(config['mountpoint']):
            hookenv.log('Not a directory: {}'.format(config['mountpoint']))
            raise VolumeConfigurationError()
    else:
        host.mkdir(config['mountpoint'])
    if os.path.ismount(config['mountpoint']):
        unmount_volume(config)
    if not host.mount(config['device'], config['mountpoint'], persist=True):
        raise VolumeConfigurationError()

def managed_mounts():
    '''List of all mounted managed volumes'''
    return filter(lambda mount: mount[0].startswith(MOUNT_BASE), host.mounts())

def configure_volume(before_change=lambda: None, after_change=lambda: None):
    '''Set up storage (or don't) according to the charm's volume configuration.
       Returns the mount point or "ephemeral". before_change and after_change
       are optional functions to be called if the volume configuration changes.
    '''

    config = get_config()
    if not config:
        hookenv.log('Failed to read volume configuration', hookenv.CRITICAL)
        raise VolumeConfigurationError()

    if config['ephemeral']:
        if os.path.ismount(config['mountpoint']):
            before_change()
            unmount_volume(config)
            after_change()
        return 'ephemeral'
    else:
        # persistent storage
        if os.path.ismount(config['mountpoint']):
            mounts = dict(managed_mounts())
            if mounts.get(config['mountpoint']) != config['device']:
                before_change()
                unmount_volume(config)
                mount_volume(config)
                after_change()
        else:
            before_change()
            mount_volume(config)
            after_change()
        return config['mountpoint']

def mount_volume(config):
    if os.path.exists(config['mountpoint']):
        if not os.path.isdir(config['mountpoint']):
            hookenv.log('Not a directory: {}'.format(config['mountpoint']))
            raise VolumeConfigurationError()
    else:
        host.mkdir(config['mountpoint'])
    if os.path.ismount(config['mountpoint']):
        unmount_volume(config)
    if not host.mount(config['device'], config['mountpoint'], persist=True):
        raise VolumeConfigurationError()

def managed_mounts():
    '''List of all mounted managed volumes'''
    return filter(lambda mount: mount[0].startswith(MOUNT_BASE), host.mounts())

def configure_volume(before_change=lambda: None, after_change=lambda: None):
    '''Set up storage (or don't) according to the charm's volume configuration.
       Returns the mount point or "ephemeral". before_change and after_change
       are optional functions to be called if the volume configuration changes.
    '''

    config = get_config()
    if not config:
        hookenv.log('Failed to read volume configuration', hookenv.CRITICAL)
        raise VolumeConfigurationError()

    if config['ephemeral']:
        if os.path.ismount(config['mountpoint']):
            before_change()
            unmount_volume(config)
            after_change()
        return 'ephemeral'
    else:
        # persistent storage
        if os.path.ismount(config['mountpoint']):
            mounts = dict(managed_mounts())
            if mounts.get(config['mountpoint']) != config['device']:
                before_change()
                unmount_volume(config)
                mount_volume(config)
                after_change()
        else:
            before_change()
            mount_volume(config)
            after_change()
        return config['mountpoint']

def mount_volume(config):
    if os.path.exists(config['mountpoint']):
        if not os.path.isdir(config['mountpoint']):
            hookenv.log('Not a directory: {}'.format(config['mountpoint']))
            raise VolumeConfigurationError()
    else:
        host.mkdir(config['mountpoint'])
    if os.path.ismount(config['mountpoint']):
        unmount_volume(config)
    if not host.mount(config['device'], config['mountpoint'], persist=True):
        raise VolumeConfigurationError()

def managed_mounts():
    '''List of all mounted managed volumes'''
    return filter(lambda mount: mount[0].startswith(MOUNT_BASE), host.mounts())

def configure_volume(before_change=lambda: None, after_change=lambda: None):
    '''Set up storage (or don't) according to the charm's volume configuration.
       Returns the mount point or "ephemeral". before_change and after_change
       are optional functions to be called if the volume configuration changes.
    '''

    config = get_config()
    if not config:
        hookenv.log('Failed to read volume configuration', hookenv.CRITICAL)
        raise VolumeConfigurationError()

    if config['ephemeral']:
        if os.path.ismount(config['mountpoint']):
            before_change()
            unmount_volume(config)
            after_change()
        return 'ephemeral'
    else:
        # persistent storage
        if os.path.ismount(config['mountpoint']):
            mounts = dict(managed_mounts())
            if mounts.get(config['mountpoint']) != config['device']:
                before_change()
                unmount_volume(config)
                mount_volume(config)
                after_change()
        else:
            before_change()
            mount_volume(config)
            after_change()
        return config['mountpoint']

def mount_volume(config):
    if os.path.exists(config['mountpoint']):
        if not os.path.isdir(config['mountpoint']):
            hookenv.log('Not a directory: {}'.format(config['mountpoint']))
            raise VolumeConfigurationError()
    else:
        host.mkdir(config['mountpoint'])
    if os.path.ismount(config['mountpoint']):
        unmount_volume(config)
    if not host.mount(config['device'], config['mountpoint'], persist=True):
        raise VolumeConfigurationError()

def managed_mounts():
    '''List of all mounted managed volumes'''
    return filter(lambda mount: mount[0].startswith(MOUNT_BASE), host.mounts())

def configure_volume(before_change=lambda: None, after_change=lambda: None):
    '''Set up storage (or don't) according to the charm's volume configuration.
       Returns the mount point or "ephemeral". before_change and after_change
       are optional functions to be called if the volume configuration changes.
    '''

    config = get_config()
    if not config:
        hookenv.log('Failed to read volume configuration', hookenv.CRITICAL)
        raise VolumeConfigurationError()

    if config['ephemeral']:
        if os.path.ismount(config['mountpoint']):
            before_change()
            unmount_volume(config)
            after_change()
        return 'ephemeral'
    else:
        # persistent storage
        if os.path.ismount(config['mountpoint']):
            mounts = dict(managed_mounts())
            if mounts.get(config['mountpoint']) != config['device']:
                before_change()
                unmount_volume(config)
                mount_volume(config)
                after_change()
        else:
            before_change()
            mount_volume(config)
            after_change()
        return config['mountpoint']

def mount_volume(config):
    if os.path.exists(config['mountpoint']):
        if not os.path.isdir(config['mountpoint']):
            hookenv.log('Not a directory: {}'.format(config['mountpoint']))
            raise VolumeConfigurationError()
    else:
        host.mkdir(config['mountpoint'])
    if os.path.ismount(config['mountpoint']):
        unmount_volume(config)
    if not host.mount(config['device'], config['mountpoint'], persist=True):
        raise VolumeConfigurationError()

def managed_mounts():
    '''List of all mounted managed volumes'''
    return filter(lambda mount: mount[0].startswith(MOUNT_BASE), host.mounts())

def mount_volume(config):
    if os.path.exists(config['mountpoint']):
        if not os.path.isdir(config['mountpoint']):
            hookenv.log('Not a directory: {}'.format(config['mountpoint']))
            raise VolumeConfigurationError()
    else:
        host.mkdir(config['mountpoint'])
    if os.path.ismount(config['mountpoint']):
        unmount_volume(config)
    if not host.mount(config['device'], config['mountpoint'], persist=True):
        raise VolumeConfigurationError()

def managed_mounts():
    '''List of all mounted managed volumes'''
    return filter(lambda mount: mount[0].startswith(MOUNT_BASE), host.mounts())

def configure_volume(before_change=lambda: None, after_change=lambda: None):
    '''Set up storage (or don't) according to the charm's volume configuration.
       Returns the mount point or "ephemeral". before_change and after_change
       are optional functions to be called if the volume configuration changes.
    '''

    config = get_config()
    if not config:
        hookenv.log('Failed to read volume configuration', hookenv.CRITICAL)
        raise VolumeConfigurationError()

    if config['ephemeral']:
        if os.path.ismount(config['mountpoint']):
            before_change()
            unmount_volume(config)
            after_change()
        return 'ephemeral'
    else:
        # persistent storage
        if os.path.ismount(config['mountpoint']):
            mounts = dict(managed_mounts())
            if mounts.get(config['mountpoint']) != config['device']:
                before_change()
                unmount_volume(config)
                mount_volume(config)
                after_change()
        else:
            before_change()
            mount_volume(config)
            after_change()
        return config['mountpoint']