From c783b8363651ed242fb4eef2f7c99a0cdb254d49 Mon Sep 17 00:00:00 2001
From: Maxim Vershinin <im@vmn.su>
Date: Tue, 11 Aug 2026 15:04:14 +0400
Subject: [PATCH] FEATURE: adds a hostname validation for lxc deployment
 playbook

---
 playbooks/deploy_and_set_up_lxc_on_proxmox.yaml | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/playbooks/deploy_and_set_up_lxc_on_proxmox.yaml b/playbooks/deploy_and_set_up_lxc_on_proxmox.yaml
index 75a6bf3..008ad80 100644
--- a/playbooks/deploy_and_set_up_lxc_on_proxmox.yaml
+++ b/playbooks/deploy_and_set_up_lxc_on_proxmox.yaml
@@ -12,7 +12,7 @@
 
   vars_prompt:
     - name: lxc_hostname
-      prompt: "Hostname for the container"
+      prompt: "Hostname for the container (may only contain letters (a-z, A-Z), numbers (0-9), and hyphens)"
       private: false
 
     - name: lxc_root_password
@@ -25,6 +25,14 @@
       prompt: "IP address for the container (in x.x.x.x/x formant)"
       private: false
 
+  pre_tasks:
+    - name: Validate hostname
+      ansible.builtin.fail:
+        msg: |
+          Invalid hostname: "{{ lxc_hostname }}"
+          Hostname may only contain letters (a-z, A-Z), numbers (0-9), and hyphens (-).
+      when: not lxc_hostname is regex('^[a-zA-Z0-9-]+$')
+      run_once: true
 
   roles:
     - ../roles/deploy_lxc_on_proxmox