@olivierlambert Yes. Using Cloudbase-init.

I'd like to use something like -

hostname: uk-xcp-{something}

Where {something} is a number that XO keeps track of per group so that for a new VM {something} is unique.

I would like some examples too.

My latest (first) try gives me:

alfcruz-adm@local.hcpa.ufrgs.br@volt-ampere:~/packer-plugin-xenserver$ packer build ./ubuntu-2004.pkr.hcl xenserver-iso.ubuntu-2004: output will be in this color. Build 'xenserver-iso.ubuntu-2004' errored after 8 seconds 155 milliseconds: API Error: SESSION_AUTHENTICATION_FAILED root Authentication failure ==> Wait completed after 8 seconds 155 milliseconds ==> Some builds didn't complete successfully and had errors: --> xenserver-iso.ubuntu-2004: API Error: SESSION_AUTHENTICATION_FAILED root Authentication failure ==> Builds finished but no artifacts were created. alfcruz-adm@local.hcpa.ufrgs.br@volt-ampere:~/packer-plugin-xenserver$

Using root user. This user/pass works over SSH.