Creating an NSO Service

#cd ncs-run/packages
#ncs-make-package --service-skeleton template <l3vpn>

[root@localhost templates]# pwd
/root/ncs-run/packages/l3vpn/templates
[root@localhost templates]# ls
l3vpn-template.xml
[root@localhost templates]# cat l3vpn-template.xml 
<config-template xmlns="http://tail-f.com/ns/config/1.0"
                 servicepoint="l3vpn">
  <devices xmlns="http://tail-f.com/ns/ncs">
    <device>
      <name>{/device}</name>
      <config>
                   <bgp xmlns="http://tail-f.com/ned/huawei-vrp">
                     <name>{/bgpas}</name>
                     <ipv4-family>
                       <vpn-instance>
                         <name>{/vpnname}</name>
                         <maximum>
                           <load-balancing>{/load}</load-balancing>
                         </maximum>
                         <peer>
                           <ip>{/peerip}</ip>
                           <as-number>{/asnum}</as-number>
                           <timer>
                             <keepalive-hold>
                               <keepalive>{/keeptime}</keepalive>
                               <hold>{/holdtime}</hold>
                             </keepalive-hold>
                           </timer>
                           <route-limit>
                             <route-limit>{/limit}</route-limit>
                             <percentage>{/percent}</percentage>
                             <idle-timeout>{/idletime}</idle-timeout>
                           </route-limit>
                           <advertise-community/>
                         </peer>
                       </vpn-instance>
                     </ipv4-family>
                   </bgp>
      </config>
    </device>
  </devices>
</config-template>
[root@localhost templates]# 

[root@localhost yang]# cat l3vpn.yang 
module l3vpn {
  namespace "http://com/example/l3vpn";
  prefix l3vpn;

  import ietf-inet-types {
    prefix inet;
  }
  import tailf-ncs {
    prefix ncs;
  }
  import tailf-common {
    prefix tailf;
  }

  list l3vpn {
    key name;

    uses ncs:service-data;
    ncs:servicepoint "l3vpn";

    leaf name {
      type string;
    }

    // may replace this with other ways of refering to the devices.

    // replace with your own stuff here
    leaf device {
      mandatory true;
      type leafref {
        path "/ncs:devices/ncs:device/ncs:name";
      }
    }
    leaf bgpas {
      type string;
    }
    leaf vpnname {
      type string;
    }
    leaf load {
      type string;
    }
    leaf peerip {
      type string;
    }
    leaf asnum {
      type string;
    }
    leaf keeptime {
      type string;
    }
    leaf holdtime {
      type string;
    }
    leaf limit {
      type string;
    }
    leaf percent {
      type string;
    }
    leaf idletime {
      type string;
    }
  }
}
[root@localhost yang]# 

$ cd PACKAGE-NAME/src
$ make

//reload 

admin@ncs# packages reload