Hello,
I created a python-and-template skeleton for Vlan service.
Very simple yang:
- vlan ID
- description
- list of switches with an IP address.
The XML configure a "interface vlan <ID> with IP and description.
The idea is to use python to "calculate" the description. In this example, the "calculation" is a string 'Configured by NSO'.
But when I commit, I get the error 'A variable value has not been assigned to: DESCRIPTION'.
Servicepoints seem OK; if I replace $DESCRIPTION by a sring n XML, everything works fine…
So it seems it's an issue in communication between Python and XML.
Any idea ?
admin@ncs(config)# services cfs-vlan VLAN200 cfs-vlan-id 200 cfs_description "*** vlan 200 ***" cfs-switch nx1 cfs-ip-add 200.1.1.1/24
admin@ncs(config-cfs-switch-nx1)# commit dry-run
Aborted: A variable value has not been assigned to: DESCRIPTION
admin@ncs(config-cfs-switch-nx1)#
YANG:
module cfs-vlan {
namespace "http://example.com/cfs-vlan";
prefix cfs-vlan;
augment /ncs:services {
list cfs-vlan {
key cfs-name;
leaf cfs-name {
type string;
}
uses ncs:service-data;
ncs:servicepoint "cfs-vlan-servicepoint";
leaf cfs-vlan-id {
type uint32;
}
leaf cfs_description {
type string;
}
list cfs-switch {
key cfs-switch-name;
unique "cfs-ip-add";
leaf cfs-switch-name {
type leafref {
path "/ncs:devices/ncs:device/ncs:name";
}
}
leaf cfs-ip-add {
type string;
}
}
}
}
}
XML:
<config-template xmlns="http://tail-f.com/ns/config/1.0" servicepoint="cfs-vlan-servicepoint">
<services xmlns="http://tail-f.com/ns/ncs">
<?foreach {/cfs-switch}?>
<rfs-router-intf xmlns="http://example.com/rfs-router-intf">
<rfs-name>{cfs-switch-name)}</rfs-name>
<rfs-device-name>{cfs-switch-name}</rfs-device-name>
<rfs-vlan>
.../...
<rfs-description>{$DESCRIPTION}</rfs-description>
</rfs-vlan>
</rfs-router-intf>
<?end?>
</services>
</config-template>
PYTHON:
class ServiceCallbacks(Service):
@service.create
def cb_create(self, tctx, root, service, proplist):
self.log.info('Service create(service=', service._path, ')')
vars = ncs.template.Variables()
vars.add('DESCRIPTION', 'Configured by NSO')
template = ncs.template.Template(service)
template.apply('cfs-vlan-template', vars)
class Main(ncs.application.Application):
def setup(self):
self.log.info('Main RUNNING')
self.register_service('cfs-vlan-servicepoint', ServiceCallbacks)
MAKEFILE:
[root@nso-dev-nc-nso6 src]#make
pylint --disable=R,C --reports=n ../python/cfs_vlan/*.py || (test $? -ge 4)
************* Module cfs_vlan.main
/root/nso-instance-NOEL/packages/cfs-vlan/python/cfs_vlan/main.py:17:8: W0622: Redefining built-in 'vars' (redefined-builtin)
/root/nso-instance-NOEL/packages/cfs-vlan/python/cfs_vlan/main.py:15:49: W0212: Access to a protected member _path of a client class (protected-access)
------------------------------------------------------------------
Your code has been rated at 8.67/10 (previous run: 8.67/10, +0.00)
