def activate_venv():
"""
Activate the venv if enabled in ``layer.yaml``.
This is handled automatically for normal hooks, but actions might
need to invoke this manually, using something like:
# Load modules from $JUJU_CHARM_DIR/lib
import sys
sys.path.append('lib')
from charms.layer.basic import activate_venv
activate_venv()
This will ensure that modules installed in the charm's
virtual environment are available to the action.
"""
from charms.layer import options
venv = os.path.abspath('../.venv')
vbin = os.path.join(venv, 'bin')
vpy = os.path.join(vbin, 'python')
use_venv = options.get('basic', 'use_venv')
if use_venv and '.venv' not in sys.executable:
# activate the venv
os.environ['PATH'] = ':'.join([vbin, os.environ['PATH']])
reload_interpreter(vpy)
layer.patch_options_interface()
layer.import_layer_libs()
import re
import sys
from base64 import b64decode
from charmhelpers.core import hookenv
from charmhelpers.core.hookenv import (
action_get,
action_set,
action_fail,
action_name
)
from charms import layer
os.environ['PATH'] += os.pathsep + os.path.join(os.sep, 'snap', 'bin')
# Import charm layers and start reactive
layer.import_layer_libs()
hookenv._run_atstart()
def protect_resources(name):
'''Do not allow the action to operate on names used by Charmed Kubernetes.'''
protected_names = ['admin',
'system:kube-controller-manager', 'kube-controller-manager',
'system:kube-proxy', 'kube-proxy',
'system:kube-scheduler', 'kube-scheduler',
'system:monitoring']
if name.startswith('kubelet') or name in protected_names:
action_fail('Not allowed to {} "{}".'.format(action, name))
sys.exit(0)