Cloud-init using Foreman as meta-data/user-data provider

[Sparc0]

I am trying to get cloud-init to work for Rocky and Ubuntu templates.
I am using L2 network and i provide my instances with a DHCP IP from a external DHCP server.
This makes the default cloud-init config to detect my cloudstack datasource and trying to connect to my router in this case a juniper.
2025-03-21 17:47:48,193 - url_helper.py[WARNING]: Calling 'None' failed [3/120s]: request error [HTTPConnectionPool(host='myJuniperIP', port=80): Max retries exceeded with url: /latest/meta-data/instance-id (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f5258b8e940>: Failed to establish a new connection: [Errno 111] Connection refu sed'))]

I have a foreman instance that can provide my instances with meta-data and user-data by creating this file in my templates

cat /etc/cloud/cloud.cfg.d/10_foreman.cfg
datasource_list: [NoCloud]
datasource:
  NoCloud:
    seedfrom: http://foremanserver/userdata/

I would like to avoid having to change and rebuild the base templates and keep them as default they come.

I read that its possible to provide above nocloud config to QEMU directly and wonder if thats something that could be done in cloudstack?
https://cloudinit.readthedocs.io/en/latest/reference/datasources/nocloud.html#dmi-specific-kernel-command-line

[weizhouapache]

@Sparc0
you can log into the vm and check the files in /sys/class/dmi/id directory

root@r-1244-VM:/sys/class/dmi/id# cat product_uuid 
1b11080e-d00f-492e-b57d-175a1328627b

for example, the product_uuid is the uuid of the vm instance in ACS.