Merge pull request #1 from roles-ansible/nsswitch

update nsswitch and variable names

README.md

@@ -7,18 +7,37 @@
 Avahi provides local hostname resolution using a "hostname.local" naming scheme.
 This ansible role installs the required dependencies and configures the DNS resolver accordingly.
 
-You can opt-out from deploying a new ``/etc/nsswitch.conf`` config by setting ``avahi__configure_nsswitch`` to ``false``.
+You can opt-out from deploying a new ``/etc/nsswitch.conf`` config by setting ``avahi_client__configure_nsswitch`` to ``false``.
 
 You can opt-in in a simple versionscheck that can prevent you from running a older version of this role by setting ``submodules_versioncheck`` to ``true``.
 
+
+Configuring nsswitch
+--------------------
+
 If you want only IPv4 or IPv6 names resolved, change ``mdns`` to ``mdns4`` or ``mdns6`` in these variables:
+
 ```yaml
-avahi__mdns_name: 'mdns'
+avahi_client__mdns_name: 'mdns'
-avahi__mdns_minimal_name: 'mdns_minimal'
+avahi_client__mdns_minimal_name: 'mdns_minimal'
 ```
 
+From the documentation of [nss-mdns](https://github.com/lathiat/nss-mdns)
+
+> `mdns` resolves both IPv6 and IPv4 addresses, `mdns4` only IPv4 addresses and `mdns6` only IPv6 addresses.
+> `mdns{4,6,}_minimal` is mostly identical to the versions without `_minimal`. However, they differ in one way. The minimal versions will always deny to resolve host names that don't end in `.local` or addresses that aren't in the range `169.254.x.x` (the range used by IPV4LL/APIPA/RFC3927.)
+> Combining the `_minimal` and the normal NSS modules allows us to make mDNS authoritative for Zeroconf host names and addresses and use it as fallback for everything else.
+
+
 Learn more
-------------
+----------
-+ [/etc/nsswitch.conf](https://man7.org/linux/man-pages/man5/nsswitch.conf.5.html)
+
-+ Avahi [wiki.archlinux.org](https://wiki.archlinux.org/title/Avahi)
+* DNS-SD [http://dns-sd.org/](http://dns-sd.org/)
-+ nss-mdns [0pointer.de](https://0pointer.de/lennart/projects/nss-mdns/#documentation)
+* mDNS [http://www.multicastdns.org/](http://www.multicastdns.org/)
+
+* Avahi [https://www.avahi.org/](https://www.avahi.org/)
+* Avahi git [https://github.com/lathiat/avahi](https://github.com/lathiat/avahi)
+* Avahi [wiki.archlinux.org](https://wiki.archlinux.org/title/Avahi)
+
+* [NSS mdns plugin](https://github.com/lathiat/nss-mdns)
+* [/etc/nsswitch.conf](https://manpages.debian.org/unstable/manpages/nsswitch.conf.5.en.html)

defaults/main.yml

@@ -1,10 +1,10 @@
 ---
 # deploy custom /etc/nsswitch.conf config
-avahi__configure_nsswitch: true
+avahi_client__configure_nsswitch: true
 
 # mdns resolver name
-avahi__mdns_name: 'mdns'
+avahi_client__mdns_name: 'mdns'
-avahi__mdns_minimal_name: 'mdns_minimal'
+avahi_client__mdns_minimal_name: 'mdns_minimal'
 
 # should we do a version check? (recomended)
 submodules_versioncheck: false

tasks/install.yml

@@ -7,8 +7,8 @@
   when:
     - ansible_pkg_mgr == "apt"
 
-- name: install avahi packages
+- name: Install Avahi packages
   become: true
   ansible.builtin.package:
-    name: "{{ avahi_packages }}"
+    name: "{{ avahi_client__packages }}"
     state: present

tasks/main.yml

@@ -14,4 +14,4 @@
 
 - name: configure /etc/nsswitch.conf
   ansible.builtin.include_tasks: nsswitch.yml
-  when: avahi__configure_nsswitch | bool
+  when: avahi_client__configure_nsswitch | bool

tasks/nsswitch.yml

@@ -1,5 +1,5 @@
 ---
-- name: deploy /etc/nsswitch.conf
+- name: Deploy '/etc/nsswitch.conf'
   become: true
   ansible.builtin.template:
     src: 'templates/nsswitch.conf.j2'

templates/nsswitch.conf.j2

@@ -12,7 +12,7 @@ gshadow:        files
 
 publickey:      files
 
-hosts:          files mymachines myhostname {{ avahi__mdns_minimal_name }} [NOTFOUND=return] resolve [!UNAVAIL=return] dns {{ avahi__mdns_name }}
+hosts:          files {{ avahi_client__mdns_minimal_name }} [NOTFOUND=return] resolve [!UNAVAIL=return] dns {{ avahi_client__mdns_name }} myhostname
 networks:       files
 
 protocols:      db [NOTFOUND=return] files

vars/Archlinux.yml

@@ -1,5 +1,5 @@
 ---
-avahi_packages:
+avahi_client__packages:
-  - avahi
+  - 'avahi'
-  - mdns-scan
+  - 'nss-mdns'
-  - nss-mdns
+# - 'mdns-scan'

vars/Debian.yml

@@ -1,5 +1,8 @@
 ---
-avahi_packages:
+avahi_client__packages:
   - 'avahi-discover'
   - 'avahi-utils'
-  - 'mdns-scan'
+  - 'libnss-mdns'
+# - 'avahi-autoipd'
+# - 'avahi-dnsconfd'
+# - 'mdns-scan'

vars/main.yml

@@ -1,4 +1,4 @@
 ---
 # versionscheck
-playbook_version_number: 6
+playbook_version_number: 7
 playbook_version_path: 'do1jlr.avahi_client.version'

vars/os_fallback.yml

@@ -1,3 +1,4 @@
 ---
-avahi_packages:
+avahi_client__packages:
-  - mdns-scan
+  - avahi
+# - 'mdns-scan'