Never been one to let the carrier drop

So, it took me numerous tries, digging, and beating of head against curtin and the like, but I have finally figured out how to set a static IP on a host using cloud-init.

Mind you, I am not talking about setting a static iP for while the installer is running. That’s easy, and well documented. I’m talking about the next time it boots.

The solution requires two bits. They’re pretty straightforward, and both go in the cloud-init file

Bit one goes at the end of the autoinstall section, and deletes the default configuration and writes a permanent one instead. Note that the filesystem is mounted as /target

  late-commands:

  – rm /target/etc/cloud/cloud.cfg.d/50-curtin-networking.cfg

  – mv /tmp/00-installer-config.yaml /target/etc/netplan

Bit two actually writes out the /tmp/00-installer-config.yaml that late-commands will be editing

write_files:

  – path: /tmp/00-installer-config.yaml

    owner: root:root

    permissions: “0644”

    content: |

      network:

        version: 2

        ethernets:

          ens160:

            critical: true

            dhcp-identifier: mac

            dhcp4: true

          ens192:

            dhcp4: no

            addresses:

            – {ipaddr}/16

            gateway4: 172.16.1.1

            nameservers:

              addresses:

              – 172.16.5.6

              search:

              – search.domain

This entry was posted on Friday, February 11th, 2022 at 2:46 am and is filed under IT, linux. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.