def chef_roledefs(api=None, hostname_attr='fqdn'):
"""Build a Fabric roledef dictionary from a Chef server.
Example:
from fabric.api import env, run, roles
from chef.fabric import chef_roledefs
env.roledefs = chef_roledefs()
@roles('web_app')
def mytask():
run('uptime')
hostname_attr is the attribute in the chef node that holds the real hostname.
to refer to a nested attribute, separate the levels with '.'.
for example 'ec2.public_hostname'
"""
api = api or ChefAPI.get_global() or autoconfigure()
if not api:
raise ChefError('Unable to load Chef API configuration')
roledefs = {}
for row in Search('role', api=api):
name = row['name']
roledefs[name] = Roledef(name, api, hostname_attr)
return roledefs
def chef_roledefs(api=None, hostname_attr = 'fqdn'):
"""Build a Fabric roledef dictionary from a Chef server.
Example:
from fabric.api import env, run, roles
from chef.fabric import chef_roledefs
env.roledefs = chef_roledefs()
@roles('web_app')
def mytask():
run('uptime')
hostname_attr is the attribute in the chef node that holds the real hostname.
to refer to a nested attribute, separate the levels with '.'.
for example 'ec2.public_hostname'
"""
api = api or ChefAPI.get_global() or autoconfigure()
if not api:
raise ChefError('Unable to load Chef API configuration')
roledefs = {}
for row in Search('role', api=api):
name = row['name']
roledefs[name] = Roledef(name, api, hostname_attr)
return roledefs
def chef_environment(name, api=None):
"""A Fabric task to set the current Chef environment context.
This task works alongside :func:`~chef.fabric.chef_roledefs` to set the
Chef environment to be used in future role queries.
Example::
from chef.fabric import chef_environment, chef_roledefs
env.roledefs = chef_roledefs()
.. code-block:: bash
$ fab env:production deploy
The task can be configured slightly via Fabric ``env`` values.
``env.chef_environment_task_alias`` sets the task alias, defaulting to "env".
This value must be set **before** :mod:`chef.fabric` is imported.
``env.chef_environment_validate`` sets if :class:`~chef.Environment` names
should be validated before use. Defaults to True.
.. versionadded:: 0.2
"""
if env.get('chef_environment_validate', True):
api = api or ChefAPI.get_global() or autoconfigure()
if not api:
raise ChefError('Unable to load Chef API configuration')
chef_env = Environment(name, api=api)
if not chef_env.exists:
raise ChefError('Unknown Chef environment: %s' % name)
env['chef_environment'] = name
def chef_roledefs(api=None, hostname_attr=['cloud.public_hostname', 'fqdn'], environment=_default_environment):
"""Build a Fabric roledef dictionary from a Chef server.
Example::
from fabric.api import env, run, roles
from chef.fabric import chef_roledefs
env.roledefs = chef_roledefs()
@roles('web_app')
def mytask():
run('uptime')
``hostname_attr`` can either be a string that is the attribute in the chef
node that holds the hostname or IP to connect to, an array of such keys to
check in order (the first which exists will be used), or a callable which
takes a :class:`~chef.Node` and returns the hostname or IP to connect to.
To refer to a nested attribute, separate the levels with ``'.'`` e.g. ``'ec2.public_hostname'``
``environment`` is the Chef :class:`~chef.Environment` name in which to
search for nodes. If set to ``None``, no environment filter is added. If
set to a string, it is used verbatim as a filter string. If not passed as
an argument at all, the value in the Fabric environment dict is used,
defaulting to ``'_default'``.
.. note::
``environment`` must be set to ``None`` if you are emulating Chef API
version 0.9 or lower.
.. versionadded:: 0.1
.. versionadded:: 0.2
Support for iterable and callable values for the``hostname_attr``
argument, and the ``environment`` argument.
"""
api = api or ChefAPI.get_global() or autoconfigure()
if not api:
raise ChefError('Unable to load Chef API configuration')
if api.version_parsed < Environment.api_version_parsed and environment is not None:
raise ChefAPIVersionError('Environment support requires Chef API 0.10 or greater')
roledefs = {}
for row in Search('role', api=api):
name = row['name']
roledefs[name] = Roledef(name, api, hostname_attr, environment)
return roledefs
def chef_roledefs(api=None, hostname_attr = 'fqdn', environment = '_default'):
"""Build a Fabric roledef dictionary from a Chef server.
Example:
from fabric.api import env, run, roles
from chef.fabric import chef_roledefs
env.roledefs = chef_roledefs()
@roles('web_app')
def mytask():
run('uptime')
hostname_attr can either be a string that is the attribute in the chef node that holds the real hostname.
Or it can be a function that takes a Node object as a parameter and returns the attribute.
To refer to a nested attribute, separate the levels with '.' e.g. 'ec2.public_hostname'
For example:
def use_ec2_hostname(node):
if node.attributes.has_dotted('fqdn'):
return 'fqdn'
else:
return 'ec2.public_hostname'
env.roledefs = chef_roledefs(hostname_attr = use_ec2_hostname)
environment is the chef environment whose nodes will be fetched. The default environment is "_default".
"""
api = api or ChefAPI.get_global() or autoconfigure()
if not api:
raise ChefError('Unable to load Chef API configuration')
if api.version_parsed < Environment.api_version_parsed and environment is not None:
raise ChefAPIVersionError('Environment support requires Chef API 0.10 or greater')
roledefs = {}
for row in Search('role', api=api):
name = row['name']
roledefs[name] = Roledef(name, api, hostname_attr, environment)
return roledefs
def chef_roledefs(api=None, hostname_attr=['cloud.public_hostname', 'fqdn'], environment='_default'):
"""Build a Fabric roledef dictionary from a Chef server.
Example::
from fabric.api import env, run, roles
from chef.fabric import chef_roledefs
env.roledefs = chef_roledefs()
@roles('web_app')
def mytask():
run('uptime')
``hostname_attr`` can either be a string that is the attribute in the chef
node that holds the hostname or IP to connect to, an array of such keys to
check in order (the first which exists will be used), or a callable which
takes a :class:`~chef.Node` and returns the hostname or IP to connect to.
To refer to a nested attribute, separate the levels with '.' e.g. 'ec2.public_hostname'
``environment`` is the chef environment whose nodes will be fetched. The
default environment is '_default'.
.. versionadded:: 0.1
.. versionadded:: 0.2
Support for iterable and callable values for the``hostname_attr``
argument, and the ``environment`` argument.
"""
api = api or ChefAPI.get_global() or autoconfigure()
if not api:
raise ChefError('Unable to load Chef API configuration')
if api.version_parsed < Environment.api_version_parsed and environment is not None:
raise ChefAPIVersionError('Environment support requires Chef API 0.10 or greater')
roledefs = {}
for row in Search('role', api=api):
name = row['name']
roledefs[name] = Roledef(name, api, hostname_attr, environment)
return roledefs
def chef_roledefs(api=None):
"""Build a Fabric roledef dictionary from a Chef server.
Example:
from fabric.api import env, run, roles
from chef.fabric import chef_roledefs
env.roledefs = chef_roledefs()
@roles('web_app')
def mytask():
run('uptime')
"""
api = api or ChefAPI.get_global() or autoconfigure()
if not api:
raise ChefError('Unable to load Chef API configuration')
roledefs = {}
for row in Search('role', api=api):
name = row['name']
roledefs[name] = Roledef(name, api)
return roledefs
def _api(api):
api = api or ChefAPI.get_global() or autoconfigure()
if not api:
raise ChefError('Unable to load Chef API configuration')
return api
def _api(api):
api = api or ChefAPI.get_global() or autoconfigure()
if not api:
raise ChefError('Unable to load Chef API configuration')
return api