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Viewing changes to hooks/charmhelpers/contrib/openstack/templating.py

  • Committer: Liam Young
  • Date: 2015-12-02 10:33:20 UTC
  • mfrom: (115.1.9 dhcp)
  • Revision ID: liam.young@canonical.com-20151202103320-0cjg1te17yovqyu3
[gnuoy, r=james-page] Adds support for serving dhcp and metadata requests to guests.

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hooks/charmhelpers/contrib/openstack/templating.py
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import six
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from charmhelpers.fetch import apt_install
 
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from charmhelpers.fetch import apt_install, apt_update
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from charmhelpers.core.hookenv import (
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    log,
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    ERROR,
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try:
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    from jinja2 import FileSystemLoader, ChoiceLoader, Environment, exceptions
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except ImportError:
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    # python-jinja2 may not be installed yet, or we're running unittests.
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    FileSystemLoader = ChoiceLoader = Environment = exceptions = None
 
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    apt_update(fatal=True)
 
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    apt_install('python-jinja2', fatal=True)
 
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    from jinja2 import FileSystemLoader, ChoiceLoader, Environment, exceptions
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class OSConfigException(Exception):
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    pass
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def os_template_dirs(templates_dir, os_release):
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    tmpl_dirs = [(rel, os.path.join(templates_dir, rel))
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                 for rel in six.itervalues(OPENSTACK_CODENAMES)]
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    if not os.path.isdir(templates_dir):
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        log('Templates directory not found @ %s.' % templates_dir,
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            level=ERROR)
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        raise OSConfigException
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    dirs = [templates_dir]
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    helper_templates = os.path.join(os.path.dirname(__file__), 'templates')
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    if os.path.isdir(helper_templates):
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        dirs.append(helper_templates)
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    for rel, tmpl_dir in tmpl_dirs:
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        if os.path.isdir(tmpl_dir):
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            dirs.insert(0, tmpl_dir)
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        if rel == os_release:
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            break
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    ch_templates = os.path.dirname(__file__) + '/charmhelpers/contrib/openstack/templates'
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    dirs.append(ch_templates)
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    log('Template search path: %s' %
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        ' '.join(dirs), level=INFO)
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    return dirs
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def get_loader(templates_dir, os_release):
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    """
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    Create a jinja2.ChoiceLoader containing template dirs up to
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    def complete_contexts(self):
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        '''
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        Return a list of interfaces that have atisfied contexts.
 
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        Return a list of interfaces that have satisfied contexts.
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        '''
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        if self._complete_contexts:
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            return self._complete_contexts
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        [interfaces.extend(i.complete_contexts())
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         for i in six.itervalues(self.templates)]
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        return interfaces
 
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    def get_incomplete_context_data(self, interfaces):
 
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        '''
 
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        Return dictionary of relation status of interfaces and any missing
 
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        required context data. Example:
 
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            {'amqp': {'missing_data': ['rabbitmq_password'], 'related': True},
 
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             'zeromq-configuration': {'related': False}}
 
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        '''
 
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        incomplete_context_data = {}
 
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        for i in six.itervalues(self.templates):
 
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            for context in i.contexts:
 
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                for interface in interfaces:
 
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                    related = False
 
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                    if interface in context.interfaces:
 
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                        related = context.get_related()
 
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                        missing_data = context.missing_data
 
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                        if missing_data:
 
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                            incomplete_context_data[interface] = {'missing_data': missing_data}
 
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                        if related:
 
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                            if incomplete_context_data.get(interface):
 
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                                incomplete_context_data[interface].update({'related': True})
 
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                            else:
 
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                                incomplete_context_data[interface] = {'related': True}
 
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                        else:
 
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                            incomplete_context_data[interface] = {'related': False}
 
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        return incomplete_context_data