From 4895573883df830a82b65b8ecf96abde18370147 Mon Sep 17 00:00:00 2001
From: Guilhem Moulin <guilhem@fripost.org>
Date: Sun, 1 Dec 2013 17:08:53 +0100
Subject: Share master.cf accross all Postfix instances.

And use main.cf's 'master_service_disable' setting to deactivate each
service that's useless for a given instance. (Hence solve conflict when
trying to listen twice on the same port, for instance.)
---
 group_vars/all.yml                            |  3 +++
 roles/common/files/etc/postfix/generic.pcre   |  2 ++
 roles/common/tasks/mail.yml                   | 15 +++++++++------
 roles/common/templates/etc/postfix/main.cf.j2 | 20 ++++++++++----------
 4 files changed, 24 insertions(+), 16 deletions(-)

diff --git a/group_vars/all.yml b/group_vars/all.yml
index 2cd3a42..a0c229e 100644
--- a/group_vars/all.yml
+++ b/group_vars/all.yml
@@ -7,3 +7,6 @@ postfix_instance:
   MX:      { name: mta-in, group: mta }
   MTA-out: { name: mta-out,group: mta }
   MSA:     { name: msa                }
+
+MTA_out: { IPv4: outgoing.fripost.org, port: 2525 }
+LDA:     { IPv4: lda.fripost.org,      port: 2526 }
diff --git a/roles/common/files/etc/postfix/generic.pcre b/roles/common/files/etc/postfix/generic.pcre
index c46f4b5..1181a22 100644
--- a/roles/common/files/etc/postfix/generic.pcre
+++ b/roles/common/files/etc/postfix/generic.pcre
@@ -1 +1,3 @@
+# Rewrite the whole enveloppe (From: & To: included) to somthing
+# routable on the internet.
 /^(.+)@([^@.]+)\.[^@]+$/    admin+${1}=${2}@fripost.org
diff --git a/roles/common/tasks/mail.yml b/roles/common/tasks/mail.yml
index 9de0eaa..c562c42 100644
--- a/roles/common/tasks/mail.yml
+++ b/roles/common/tasks/mail.yml
@@ -15,13 +15,16 @@
   notify:
     - Restart Postfix
 
-- name: Define dynamic maps for children instances
-  # main.cf and master.cf are configured in dedicated roles, though
-  file: src=../postfix/dynamicmaps.cf
-        dest=/etc/postfix-{{ postfix_instance[item].name }}/dynamicmaps.cf
-        owner=root group=root state=link
+- name: Link the dynamic maps & master.cf of each children to the master's
+  # main.cf is specialized to each dedicated role, though
+  file: src=../postfix/{{ item.1 }}
+        dest=/etc/postfix-{{ postfix_instance[item.0].name }}/{{ item.1 }}
+        owner=root group=root
+        state=link force=yes
   register: r2
-  with_items: postfix_instance.keys() | intersect(group_names) | list
+  with_nested:
+    - postfix_instance.keys() | intersect(group_names) | list
+    - [ 'dynamicmaps.cf', 'master.cf' ]
   notify:
     - Restart Postfix
 
diff --git a/roles/common/templates/etc/postfix/main.cf.j2 b/roles/common/templates/etc/postfix/main.cf.j2
index 0922b49..59bf0ba 100644
--- a/roles/common/templates/etc/postfix/main.cf.j2
+++ b/roles/common/templates/etc/postfix/main.cf.j2
@@ -11,11 +11,9 @@ mydomain            = {{ ansible_domain }}
 append_dot_mydomain = no
 
 # This server is for internal use only
-mynetworks_style  = host
-inet_interfaces   = loopback-only
-inet_protocols    = ipv4
-# Tunnel everything through IPSec
-smtp_bind_address = 172.16.0.1
+mynetworks_style = host
+inet_interfaces  = loopback-only
+inet_protocols   = ipv4
 
 # No local delivery
 mydestination        =
@@ -33,15 +31,17 @@ smtp_generic_maps = pcre:$config_directory/generic.pcre
 
 # Forward everything to our internal mailhub
 {% if 'MTA-out' in group_names %}
-relayhost = [127.0.0.1]:2525
+# TODO: use a UNIX socket instead
+relay_transport = lmtp:unix:private/mta-out
 {% else %}
-relayhost = [outgoing.fripost.org]:2525
+relayhost       = [{{ MTA_out.IPv4 }}]:{{ MTA_out.port }}
 {% endif %}
+relay_domains   =
 
-# This server is for internal use only; external connections are
-# protected by IPSec already
-smtpd_tls_security_level = none
+# Tunnel everything through IPSec
 smtp_tls_security_level  = none
+smtp_bind_address        = 172.16.0.1
+smtpd_tls_security_level = none
 
 # Turn off all TCP/IP listener ports except that dedicated to
 # samhain(8), which sadly cannot use pickup through the sendmail binary.
-- 
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