[Kimchi-devel] [PATCHv7 8/8] storage target: Add model support

Aline Manera alinefm at linux.vnet.ibm.com
Fri Jan 17 18:48:35 UTC 2014


On 01/14/2014 01:48 PM, lvroyce0210 at gmail.com wrote:
> From: Royce Lv <lvroyce at linux.vnet.ibm.com>
>
> Construct xml to query storage targets information from
> storage server.
> Use lxml to parse result instead of etree.
> Use lxml to parse target query result.
>
> Signed-off-by: Royce Lv <lvroyce at linux.vnet.ibm.com>
> ---
>   src/kimchi/model.py | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
>   1 file changed, 48 insertions(+)
>
> diff --git a/src/kimchi/model.py b/src/kimchi/model.py
> index 3207e72..c0d82eb 100644
> --- a/src/kimchi/model.py
> +++ b/src/kimchi/model.py
> @@ -45,6 +45,7 @@ import uuid
>   from cherrypy.process.plugins import BackgroundTask
>   from cherrypy.process.plugins import SimplePlugin
>   from collections import defaultdict
> +from lxml import objectify
>   from xml.etree import ElementTree
>
>
> @@ -1322,6 +1323,24 @@ class Model(object):
>
>           raise NotFoundError
>
> +    def storagetargets_get_list(self, storage_server, target_type=None):
> +        target_types = STORAGE_SOURCES.keys() if not target_type else [target_type]
> +        target_list = list()
> +
> +        for target_type in target_types:
> +            xml = _get_storage_server_spec(server=storage_server, target_type=target_type)
> +            conn = self.conn.get()
> +
> +            try:
> +                ret = conn.findStoragePoolSources(target_type, xml, 0)
> +            except libvirt.libvirtError as e:
> +                kimchi_log.warning("Query storage pool source fails because of %s",
> +                    e.get_error_message())
> +                continue
> +
> +            target_list.extend(_parse_target_source_result(target_type, ret))
> +        return target_list
> +
>       def _get_screenshot(self, vm_uuid):
>           with self.objstore as session:
>               try:
> @@ -1532,6 +1551,35 @@ class LibvirtVMScreenshot(VMScreenshot):
>               os.close(fd)
>
>
> +def _parse_target_source_result(target_type, xml_str):
> +    root = objectify.fromstring(xml_str)
> +    ret = []
> +    for source in root.getchildren():
> +        if target_type == 'netfs':
> +            host_name = source.host.get('name')
> +            target_path = source.dir.get('path')
> +            type = source.format.get('type')
> +        ret.append(dict(host=host_name, target_type=type, target=target_path))

You need to add which parameters returned in API

> +    return ret
> +
> +
> +def _get_storage_server_spec(**kwargs):
> +    # Required parameters:
> +    # server:
> +    # target_type:
> +    if kwargs['target_type'] == 'netfs':
> +        kwargs['format_type'] = """<format type='nfs'/>"""
> +    else:
> +        kwargs['format_type'] = ""
> +    xml = """
> +    <source>
> +      <host name='%(server)s'/>
> +      %(format_type)s
> +    </source>
> +    """ % kwargs
> +    return xml
> +
> +
>   class StoragePoolDef(object):
>       @classmethod
>       def create(cls, poolArgs):




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