My current local domain is
Context: Newbie in networking. I dynamically create LXC containers in Proxmox. I want to configure the containers with Ansible, but I need an IP address or hostname for that. Proxmox can't tell me what IP addresses the DHCP server assigns to containers without ugly workarounds, but I can choose a hostname.
Suppose I give a container the hostname
subdomain.mydomain.com. The following domains resolve:
The following domains don't resolve:
Since there are different deployment environments, I expect to be able to resolve FQDNs, such as
subdomain.mydomain.com, to avoid conflicts with domains starting with the same label, such as
I could rely on one domain level; flatten the DNS structures, and prepend a unique deployment identifier to hostnames, but I want to stay as close as possible to what the production environment looks like, and keep project porting work as close to zero as possible.
I may link to the resources I tried to apply after I slept over my hours long shotgun debugging session. I think, unsure on the details and outcomes, I tried to do the following:
- Lua cgi script to resolve mac addresses to IP addresses since I know container mac addresses. I didn't use the script because I would've needed to patch several libraries. Probably also not future-proof, I would need to port the script to other distros, such as pfSense, I assume.
- Develop a python web API for Proxmox to get IP addresses by VM ids using shell commands inside containers, which didn't work well due to different distros and poor performance.
- Use some sort of script,
/etc/hotplug.d/dhcp/00-custom.???, which should've enabled subdomain support, but didn't.
- Selective DNS forwarding with
uci add_list dhcp.@dnsmasq.server="/mydomain.com/192.168.0.1"