This is a Netdisco hook that can suppress the is_uplink detection of interfaces, based on attributes in device_port. It's tied deeply enough into Netdisco to use database parameters and settings from deployment.yml.

See https://github.com/netdisco/netdisco/wiki/Hooks for more information about Hooks in general.

To run this hook after a device is discovered, put the following into deployment.yml

hooks:
  - type: 'exec'
    event: 'discover'
    with:
      cmd: '/home/netdisco/perl5/bin/discover_hook [% ip %]'

To configure the interfaces that should not be uplinks, add a section like this in deployment.yml. The supplied fields are matched as regex against the columns in device_port, ie. the second example will turn into update device_port set is_uplink = false where remote_type ~* 'proliant' and remote_port ~* 'ALOM' and ip = 'discovered_device_ip'. Any number of columns from device_port can be added.

discover_hook:
    no_uplink_port:
        # HP blades typically host a bunch of VMs which we want to show up as nodes
        - remote_type: HP VC FlexFabric
        # Typical node that happens to speak some LLDP and is thus wrongly considered an undiscovered neighbor device
        - remote_type: proliant
          remote_port: ALOM

To see what's going on in the hooks queue, use e.g.

$ netdisco-do psql
netdisco=> select *  from admin where action ~* 'hook:' order by entered desc limit 5;