Comment 3 for bug 1530227

Hi,

I've updated Juanjo's script at [0]: 1) minor rewrite for py3, 2) works on keystonev3 environments.

Since the type of neutron-plugin is configured on charm-neutron-api, but charm-neutron-openvswitch is related to charm-nova-compute, I think this fix should be added in charm-neutron-openvswitch.

According to [1], nrpe-external-master relation doesn't exist, and I think "juju add-relation neutron-openvswitch:nrpe-external-master nrpe:nrpe-external-master" should trigger the addition of this check.

Output looks like:
"""
OK: all needed tun_ids present: [1031, 1064, 1097, 1128, 1041, 1078]
"""

NRPE check would need to be split in two:
1) cronjob run as nova user: 1) will have access to /etc/nova/nova.conf to gather keystone credentials to list instances, networks and ports; 2) will need to use rootwrap which enables "ovs-ofctl" command run_as root

2) nrpe check which parses generated output by step #1

0. https://pastebin.canonical.com/p/5jSJzW8t5V/
1. https://github.com/openstack/charm-neutron-openvswitch/blob/master/metadata.yaml