update...

roles/common/tasks/basic.yml

@@ -105,7 +105,7 @@
     group: root
     owner: root
   when: 
-    - inventory_hostname not in groups['lxc_guest']
+    - inventory_hostname not in groups['lxc_guest'] or inventory_hostname in groups['lxc_host']
     - copy_plain_files_sysctl is defined
     - copy_plain_files_sysctl|length > 0
   tags:
@@ -122,7 +122,7 @@
   loop_control:
     label: 'dest: {{ item.name }}'
   when: 
-    - inventory_hostname not in groups['lxc_guest']
+    - inventory_hostname not in groups['lxc_guest'] or inventory_hostname in groups['lxc_host']
     - copy_plain_files_sysctl is defined
     - copy_plain_files_sysctl|length > 0
   tags:
@@ -139,7 +139,7 @@
   loop_control:
     label: 'dest: {{ item.name }}'
   when: 
-    - inventory_hostname not in groups['lxc_guest']
+    - inventory_hostname not in groups['lxc_guest'] or inventory_hostname in groups['lxc_host']
     - copy_additional_plain_files_sysctl is defined
     - copy_additional_plain_files_sysctl|length > 0
   tags:

roles/common/tasks/copy_files.yml

@@ -1,6 +1,23 @@
 ---
 
+# ---
+# Some Checks
+# ---
 
+- name: Check if file '/etc/postfix/relay_domains' exists
+  stat:
+    path: /etc/postfix/relay_domains
+  register: relay_domains_actual
+
+- name: (copy_files.yml) Get checksum of '/etc/postfix/relay_domains'
+  set_fact:
+    relay_domains_sha1: "{{ relay_domains_actual.stat.checksum }}"
+  when:
+    - relay_domains_actual.stat.exists
+  
+# ---
+# Copy files - main 
+# ---
 
 - name: (copy_files.yml) Copy plain files
   copy:
@@ -36,6 +53,26 @@
   tags:
     - copy-files
     - copy-plain-files
+  notify: "Reload postfwd"
+
+- name: (copy_files.yml) Copy host specific plain files Postfix (/etc/postfix)
+  copy:
+    src: '{{ item.src_path }}'
+    dest: '{{ item.dest_path }}'
+    owner: root
+    group: root
+    mode: '0644'
+  loop: "{{ copy_plain_files_postfix_host_specific }}"
+  loop_control:
+    label: 'dest: {{ item.name }}'
+  when: 
+    - inventory_hostname in groups['mail_server']
+    - copy_plain_files_postfix_host_specific is defined
+    - copy_plain_files_postfix_host_specific|length > 0
+  tags:
+    - copy-files
+    - copy-plain-files
+  notify: "Reload postfwd"
 
 - name: (copy_files.yml) Copy plain files Postfix Firewall (postfwd)
   copy:
@@ -92,3 +129,26 @@
   tags:
     - copy-files
     - copy-template-files
+
+# ---
+# Some final tasks
+# ---
+
+- name: Get checksum oif (possible upodated) file '/etc/postfix/relay_domains' exists
+  stat:
+    path: /etc/postfix/relay_domains
+  register: relay_domains_new
+
+- name: (copy_files.yml) Get checksum of '/etc/postfix/relay_domains'
+  set_fact:
+    relay_domains_sha1_new: "{{ relay_domains_new.stat.checksum }}"
+  when:
+    - relay_domains_new.stat.exists
+    
+- name: (copy_files.yml) Renew database /etc/postfix/relay_domains.db
+  shell: '/usr/sbin/postmap btree:/etc/postfix/relay_domains'
+  when:
+    - relay_domains_actual.stat.exists
+    - relay_domains_new.stat.exists
+    - relay_domains_actual.stat.checksum != relay_domains_new.stat.checksum
+  notify: "Reload postfwd"