Ubuntu – Ubuntu 18.04 bond with netplan duplicate MAC address after cloning

18.04clonezillanetplannetwork-bondingserver

I have a situation in which I have many identical servers to setup Ubuntu 18.04 on. I set one server up, took an image with Clonezilla and then restored on all others.

Normally, I go to each of these servers, then I apply the necessary changes to /etc/hostname, /etc/hosts and the netplan YAML file to reflect the correct settings.

The problem is that the bond I have configured in the netplan file always comes up with an identical MAC address to the server I took an image from, so the network fails completely.

Any idea how can I fix that?

Best Answer

This has been resolved by deleting the /etc/machine-id file and rebooting or just using the systemd-machine-id-setup utility.

Related Solutions

Network Bonding – Configure Bonded 802.3ad Network Using Netplan on Ubuntu 18.04

After some digging, I discovered that Ubuntu 18.04 uses a utility called cloud-init to handle network configuration and initialization during the boot sequence. The file /etc/cloud/cloud.cfg.d/50-curtin-networking.cfg and other .cfg files are used to reconfigure cloud-init settings. My config file settings are as follows:

network:
  version: 2
  ethernets:
    eports:
      match:
        name: eno*
      optional: true
  bonds:
    bond0:
      interfaces: [eports]
      addresses: [192.168.1.101/24]
      gateway4: 192.168.1.1
      nameservers:
        addresses: [8.8.8.8, 8.8.4.4]
      parameters:
        mode: 802.3ad
        lacp-rate: fast
        mii-monitor-interval: 100

The optional: true parameter prevents the system from waiting for a valid network connection at boot time which will save you the hassle of waiting 2 minutes for your machine to boot. After updating the config file run the following command to update your configuration.

cloud-init clean -reboot

Alternatively running the following allows for some debug information without rebooting your machine; however, a reboot will be required to commit the changes during early boot stages.

cloud-init clean
cloud-init init
cloud-init status

Best Answer

Related Solutions

Network Bonding – Configure Bonded 802.3ad Network Using Netplan on Ubuntu 18.04

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