def _get_instance(srv_inst):
# get the latest info
mani_id = srv_inst.context['manifest_id']
mani = STORE.get_manifest(manifest_id=mani_id)
if len(mani) < 1:
return 'no manifest found.', 404
# Get the latest info of the instance
# could also use STORE.get_service_instance(srv_inst) but will not have all details
inst_info = RM.info(instance_id=srv_inst.context['id'], manifest_type=mani[0].manifest_type)
if inst_info['srv_inst.state.state'] == 'failed':
# try epm.delete(instance_id=instance_id)?
return 'There has been a failure in creating the service instance.', 500
srv_inst.state.state = inst_info['srv_inst.state.state']
srv_inst.state.description = inst_info['srv_inst.state.description']
# don't need you any more, buh-bye!
del inst_info['srv_inst.state.state']
del inst_info['srv_inst.state.description']
# merge the two context dicts
srv_inst.context = {**srv_inst.context, **inst_info}
# update the service instance record - there should be an asynch method doing the update - event based
STORE.add_service_instance(srv_inst)
return srv_inst
def create_service_instance(instance_id, service, accept_incomplete=None):
"""
Provisions a service instance
When the broker receives a provision request from a client, it should synchronously take whatever action is
necessary to create a new service resource for the developer. The result of provisioning varies by service
type, although there are a few common actions that work for many services. Supports asynchronous operations.'
:param instance_id: 'The instance_id of a service instance is provided by the client. This ID will be used for
future requests (bind and deprovision), so the broker must use it to correlate the resource it creates.'
:type instance_id: str
:param service: Service information.
:type service: dict | bytes
:param accept_incomplete: Indicates that the client is supporting asynchronous operations
:type accept_incomplete: bool
:rtype: ServiceResponse
"""
ok, message, code = _version_ok()
if not ok:
return message, code
else:
if len(STORE.get_service_instance(instance_id=instance_id)) == 1:
return 'Service instance with id {id} already exists'.format(id=instance_id), 409
if connexion.request.is_json:
service = ServiceRequest.from_dict(connexion.request.get_json())
else:
return "Supplied body content is not or is mal-formed JSON", 400
# look up manifest based on plan id
# based on the manifest type, select the driver
# send the manifest for creation to the target system
# store the ID along with refs to service, plan and manifest
# get the manifest for the service/plan
svc_type = STORE.get_service(service.service_id)[0]
if svc_type is None:
return 'Unrecognised service requested to be instantiated', 404
plans = svc_type.plans
plan = [p for p in plans if p.id == service.plan_id]
if len(plan) <= 0:
return 'Plan {p_id} found.'.format(p_id=service.plan_id), 404
mani = STORE.get_manifest(plan_id=plan[0].id)
if len(mani) <= 0:
return 'no manifest for service {plan} found.'.format(plan=service.plan_id), 404
mani = mani[0]
if accept_incomplete: # given docker-compose runs in detached mode this is not needed - only timing can verify
# XXX put this in a thread to allow for asynch processing?
RM.create(instance_id=instance_id, content=mani.manifest_content,
c_type=mani.manifest_type, parameters=service.parameters)
else:
RM.create(instance_id=instance_id, content=mani.manifest_content,
c_type=mani.manifest_type, parameters=service.parameters)
last_op = LastOperation( # stored within the service instance doc
state='creating',
description='service instance is being created'
)
# store the instance Id with manifest id
srv_inst = ServiceInstance(
service_type=svc_type,
state=last_op,
context={
'id': instance_id,
'manifest_id': mani.id,
}
)
STORE.add_service_instance(srv_inst)
if accept_incomplete:
STORE.add_last_operation(instance_id=instance_id, last_operation=last_op)
return 'created', 200