Comment 0 for bug 1817079

With the following extract from the bundle, the initial deployment of the charm does not create the virtual functions.

neutron-openvswitch:
    charm: cs:neutron-openvswitch
    num_units: 0
    bindings:
      data: *overlay-space
    options:
      worker-multiplier: *worker-multiplier
      bridge-mappings: *bridge-mappings
      prevent-arp-spoofing: True
      firewall-driver: openvswitch
      dns-servers: "8.8.8.8"
      enable-local-dhcp-and-metadata: true
      data-port: 'br-data:eno4'
      enable-sriov: True
      sriov-device-mappings: 'physnet_sriov:eno5'
      sriov-numvfs: '[{"devname": "eno5", "physical_network": "physnet_sriov"}]

After the deployment, without any error, on one of the hosts:
ip link show eno5
16: eno5: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 9000 qdisc mq state DOWN mode DEFAULT group default qlen 1000
    link/ether 04:09:73:ca:93:dc brd ff:ff:ff:ff:ff:ff

We can see that no VF has been created.
To work around that issue, it is necessary to trigger a config-changed.
For example:

juju config neutron-openvswitch sriov-numvfs=''
juju deploy bundle.yaml

After that, we can see the created VFs:
ip link show eno5
16: eno5: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 9000 qdisc mq state DOWN mode DEFAULT group default qlen 1000
    link/ether 04:09:73:ca:93:dc brd ff:ff:ff:ff:ff:ff
    vf 0 MAC 00:00:00:00:00:00, spoof checking off, link-state auto, trust off, query_rss off
    vf 1 MAC 00:00:00:00:00:00, spoof checking off, link-state auto, trust off, query_rss off
    vf 2 MAC 00:00:00:00:00:00, spoof checking off, link-state auto, trust off, query_rss off
    vf 3 MAC 00:00:00:00:00:00, spoof checking off, link-state auto, trust off, query_rss off
    vf 4 MAC 00:00:00:00:00:00, spoof checking off, link-state auto, trust off, query_rss off
    vf 5 MAC 00:00:00:00:00:00, spoof checking off, link-state auto, trust off, query_rss off
    vf 6 MAC 00:00:00:00:00:00, spoof checking off, link-state auto, trust off, query_rss off
    vf 7 MAC 00:00:00:00:00:00, spoof checking off, link-state auto, trust off, query_rss off