init Postfix roles

postfix/README.md

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+# Postfix
+
+Install Postfix
+
+## Tasks
+
+Minimal configuration is in `tasks/main.yml`.
+
+## Available variables
+
+Main variables are :
+
+* `postfix_hostname` : hostname for Postfix ;
+* `postfix_slow_transport` : enable customization for delivrability.
+
+The full list of variables (with default values) can be found in `defaults/main.yml`.

postfix/defaults/main.yml

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+---
+postfix_hostname: "{{ ansible_fqdn }}"
+postfix_slow: False

postfix/handlers/main.yml

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+---
+- name: restart postfix
+  service:
+    name: postfix
+    state: restarted
+

postfix/tasks/main.yml

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+- name: ensure packages are installed
+  apt:
+    name: '{{ item }}'
+    state: present
+  with_items:
+    - postfix
+    - mailgraph
+
+- name: check if main.cf is default
+  shell: egrep -v "^(myhostname|mydestination|mailbox_command)" /etc/postfix/main.cf  | md5sum -
+  changed_when: False
+  #check_mode: no (for migration to Ansible 2.2)
+  always_run: yes
+  register: default_main_cf
+  
+- name: create minimal main.cf
+  template:
+    src: evolinux_main.cf.j2
+    dest: /etc/postfix/main.cf
+    owner: root
+    group: root
+    mode: 0644
+    force: yes
+  when: default_main_cf.stdout == "5450c05d65878e99dad696c7c722e511  -"
+  notify: restart postfix
+
+- meta: flush_handlers
+

postfix/templates/evolinux_main.cf.j2

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+smtpd_banner = $myhostname ESMTP mail server
+biff = no
+append_dot_mydomain = no
+myhostname = {{ postfix_hostname }}
+alias_maps = hash:/etc/aliases
+alias_database = hash:/etc/aliases
+myorigin = $myhostname
+mydestination = $myhostname localhost.localdomain localhost
+relayhost = 
+mynetworks = 127.0.0.0/8
+mailbox_size_limit = 0
+recipient_delimiter = +
+inet_interfaces = all
+inet_protocols = ipv4
+disable_vrfy_command = yes