OK I changed up the approach here after some good testing on Azure (attaching new nics, detatching original eth0 nic, reattaching nics etc).
systemd does let us pass inverted matches per https://www.freedesktop.org/software/systemd/man/systemd.network.html#Name= Per Daniel's suggestion, we can deliver a static netplan yaml in Azure netplan-enabled cloud-images. But, that netplan needs to complement the original 50-cloud-init.yaml which will not be updated by cloud-init after first boot. We can then also drop the udev rules and the changes I made to ephemeral_eth.sh script as that would be completely unused in netplan environments. This way we don't have to run netplan apply on each udev add event. The static netplan is as follows: /etc/netplan/90-hotplug-azure.yaml # Automatically generated by /usr/local/sbin/ephemeral_eth.sh to setup # Azure attached nics after initial instance boot network: version: 2 ethernets: ephemeral: dhcp4: true match: driver: hv_netvsc name: '!eth0' optional: true hotpluggedeth0: dhcp4: true match: driver: hv_netvsc name: 'eth0' -- https://code.launchpad.net/~chad.smith/vmbuilder/jenkins_kvm_azure_netplan_hotplug/+merge/347212 Your team VMBuilder is requested to review the proposed merge of lp:~chad.smith/vmbuilder/jenkins_kvm_azure_netplan_hotplug into lp:~ubuntu-on-ec2/vmbuilder/jenkins_kvm. _______________________________________________ Mailing list: https://launchpad.net/~vmbuilder Post to : [email protected] Unsubscribe : https://launchpad.net/~vmbuilder More help : https://help.launchpad.net/ListHelp
