Updates for better compatibility

roles/hostname/defaults/main.yml

@@ -0,0 +1,13 @@
+---
+hostname_project_author : Chris Hammer
+hostname_project_email  : chris@thezengarden.net
+hostname_project_repo   : https://github.com/jchristianh-ansible-collections/baseos
+
+hostname_template_header : The Zen Garden
+
+hostname_hostname_file        : /etc/hostname
+hostname_hostname_version     : 1.0.0
+hostname_hostname_revision    : 240228
+
+
+...

roles/hostname/tasks/main.yml

@@ -1,9 +1,40 @@
 ---
-- name: Set hostname for host
-  ansible.builtin.hostname:
-    name: "{{ inventory_hostname }}"
-  notify:
-    - "Restart_syslog_{{ ansible_distribution | lower }}_{{ ansible_distribution_major_version }}"
+
+- name: Use hostname module to set hostname, or failback to command module
+  block:
+    - name: Set hostname for host using hostname module
+      ansible.builtin.hostname:
+        name: "{{ inventory_hostname }}"
+      notify:
+        - "Restart_syslog_{{ ansible_distribution | lower }}_{{ ansible_distribution_major_version }}"
+
+  rescue:
+    - name: Ensure hostname package is present
+      ansible.builtin.package:
+        name: hostname
+        state: present
+
+    - name: Set hostname file if running in container
+      ansible.builtin.set_fact:
+        hostname_hostname_file: "{{ hostname_hostname_file }}.container"
+      when:
+        - ansible_virtualization_type | regex_search("docker|podman|container")
+
+    - name: Add entry into hostname file
+      ansible.builtin.lineinfile:
+        path: "{{ hostname_hostname_file }}"
+        line: "{{ inventory_hostname }}"
+        state: present
+        create: true
+        mode: '0644'
+
+    - name: Update hostname from /etc/hostname
+      ansible.builtin.command:
+        cmd: "hostname -F {{ hostname_hostname_file }}"
+      notify:
+        - "Restart_syslog_{{ ansible_distribution | lower }}_{{ ansible_distribution_major_version }}"
+      when:
+        - not ansible_virtualization_type | regex_search("docker|podman|container")
 
 
 ...

roles/resolv_conf/tasks/main.yml

@@ -1,7 +1,7 @@
 ---
-- name: Set resolv_conf_file if running in container
+- name: Set resolv.conf if running in container
   ansible.builtin.set_fact:
-    resolv_conf_resolv_conf_file: "{{ resolv_conf_resolv_conf_file }}.docker"
+    resolv_conf_resolv_conf_file: "{{ resolv_conf_resolv_conf_file }}.container"
   when:
     - ansible_virtualization_type | regex_search("docker|podman|container")