ctucx.git: ansible-configs

common: set hostname only if changed

diff --git a/roles/common/tasks/network.yml b/roles/common/tasks/network.yml
@@ -18,15 +18,17 @@
     dest: /etc/resolv.conf
     mode: 0755
 
-- name: set hostname
-  hostname:
-    name: "{{network.hostname}}"
-    use: alpine
-
 - name: "create file: /etc/hostname"
   copy:
     content: "{{network.hostname}}"
     dest: /etc/hostname
+  register: hostname
+
+- name: Change hostname of running system
+  hostname:
+    name: "{{network.hostname}}"
+    use: alpine
+  when: hostname.changed
 
 - name: enable NAT support
   ansible.posix.sysctl: