Talos Linux ignores domain part of hostname

[haruops]

Hello!
Please help me solve an issue related to the hostname.
I set machine.network.hostname: "control-01.domain.local", but the resulting hostname appears as control-01

In /etc/hosts, I can see the following

$ talosctl read /etc/hosts --nodes 172.16.10.11  

127.0.0.1    localhost  
172.16.10.11 control-01.domain.local control-01  
::1          localhost ip6-localhost ip6-loopback  

$ hostname  

control-01 

And accordingly, in the end, I want to get the FQDN (сontrol-01.domain.local)

Talos: talos-v1.9.4-nocloud-amd64
K8s: 1.32.0

[smira]

This is correct behavior, as hostname is always "short", not FQDN.

talosctl get hostname would provide more detailed result.

If you're asking about Kubernetes node name, Talos has an option for it: see kubelet configuration, registerWithFQDN.

[haruops]

@smira Thank you! In the end, I got the FQDN by adding the following changes:

machine:
  network:
    hostname: ${fqdn}
  kubelet:
    extraArgs:
      hostname-override: ${fqdn}
    registerWithFQDN: true

[smira]

you don't need hostname-override, fyi