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from charmhelpers.core.hookenv import (
action_get,
action_fail,
action_set,
status_set,
log,
config,
)
from charms.reactive import (
clear_flag,
set_flag,
when,
when_not,
)
import charms.osm.ns
import json
import traceback
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@when_not('ns.installed')
def install_ns():
set_flag('ns.installed')
status_set('active', 'Ready!')
@when('actions.add-user')
def action_add_user():
"""Add a user to the database."""
err = ''
output = ''
try:
username = action_get('username')
bw = action_get('bw')
qos = action_get('qos')
tariff = action_get('tariff')
# Get the configuration, which should contain the juju username and
# password. The endpoint and model will be discovered automatically
cfg = config()
client = charms.osm.ns.NetworkService(
user=cfg['juju-username'],
secret=cfg['juju-password'],
)
user_id = add_user(client, username, tariff)
if user_id > 0:
success = set_policy(client, user_id, bw, qos)
else:
log("user_id is 0; add_user failed.")
log("Output from charm: {}".format(output))
except Exception as err:
log(str(err))
log(str(traceback.format_exc()))
action_fail(str(err))
else:
action_set({
'user-id': user_id,
'policy-set': success,
})
finally:
clear_flag('actions.add-user')
def add_user(client, username, tariff):
"""Add a user to the database and return the id."""
cfg = config()
ns_config_info = json.loads(cfg['ns_config_info'])
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application = ns_config_info['osm-config-mapping']['{}.{}.{}'.format(
'1', # member-vnf-index
'userVM', # vdu_id
'0', # vdu_count_index
)]
output = client.ExecutePrimitiveGetOutput(
# The name of the application for adding a user
application,
# The name of the action to call
"add-user",
# The parameter(s) required by the above charm and action
params={
'username': username,
'tariff': tariff,
},
# How long to wait (in seconds) for the action to finish
timeout=500
)
# Get the output from the `add-user` function
user_id = int(output['user-id'])
return user_id
def set_policy(client, user_id, bw, qos):
"""Set the policy for a user."""
success = False
cfg = config()
ns_config_info = json.loads(cfg['ns_config_info'])
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application = ns_config_info['osm-config-mapping']['{}.{}.{}'.format(
'2', # member-vnf-index
'policyVM', # vdu_id
'0', # vdu_count_index
)]
success = client.ExecutePrimitiveGetOutput(
# The name of the application for policy management
application,
# The name of the action to call
"set-policy",
# The parameter(s) required by the above charm and action
params={
'user_id': user_id,
'bw': bw,
'qos': qos,
},
# How long to wait (in seconds) for the action to finish
timeout=500
)
# Get the output from the `add-user` function
return success