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Viewing changes to cloudinit/sources/DataSourceBigstep.py

  • Committer: Scott Moser
  • Date: 2016-08-10 15:06:15 UTC
  • Revision ID: smoser@ubuntu.com-20160810150615-ma2fv107w3suy1ma
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cloudinit/sources/DataSourceBigstep.py
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#
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#    Copyright (C) 2015-2016 Bigstep Cloud Ltd.
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#
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#    Author: Alexandru Sirbu <alexandru.sirbu@bigstep.com>
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#
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import errno
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import json
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from cloudinit import log as logging
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from cloudinit import sources
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from cloudinit import url_helper
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from cloudinit import util
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LOG = logging.getLogger(__name__)
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class DataSourceBigstep(sources.DataSource):
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    def __init__(self, sys_cfg, distro, paths):
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        sources.DataSource.__init__(self, sys_cfg, distro, paths)
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        self.metadata = {}
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        self.vendordata_raw = ""
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        self.userdata_raw = ""
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    def get_data(self, apply_filter=False):
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        url = get_url_from_file()
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        if url is None:
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            return False
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        response = url_helper.readurl(url)
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        decoded = json.loads(response.contents)
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        self.metadata = decoded["metadata"]
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        self.vendordata_raw = decoded["vendordata_raw"]
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        self.userdata_raw = decoded["userdata_raw"]
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        return True
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def get_url_from_file():
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    try:
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        content = util.load_file("/var/lib/cloud/data/seed/bigstep/url")
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    except IOError as e:
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        # If the file doesn't exist, then the server probably isn't a Bigstep
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        # instance; otherwise, another problem exists which needs investigation
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        if e.errno == errno.ENOENT:
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            return None
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        else:
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            raise
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    return content
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# Used to match classes to dependencies
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datasources = [
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    (DataSourceBigstep, (sources.DEP_FILESYSTEM, sources.DEP_NETWORK)),
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]
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# Return a list of data sources that match this set of dependencies
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def get_datasource_list(depends):
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    return sources.list_from_depends(depends, datasources)