Set message of the day

README.rst

@@ -236,6 +236,32 @@ PS1 in ``/etc/bash.bashrc`` and ``~/.bashrc`` (which comes from
 ``/etc/skel/.bashrc``). This formula will do this automatically, but will not
 touch existing user's ``~/.bashrc`` files except root.
 
+Message of the day
+~~~~~~~~~~~~~~~~~~
+
+``pam_motd`` from package ``update-motd`` is used for dynamic messages of the
+day. Setting custom motd will cleanup existing ones.
+
+.. code-block:: yaml
+
+    linux:
+      system:
+        motd:
+          - release: |
+              #!/bin/sh
+              [ -r /etc/lsb-release ] && . /etc/lsb-release
+
+              if [ -z "$DISTRIB_DESCRIPTION" ] && [ -x /usr/bin/lsb_release ]; then
+              	# Fall back to using the very slow lsb_release utility
+              	DISTRIB_DESCRIPTION=$(lsb_release -s -d)
+              fi
+
+              printf "Welcome to %s (%s %s %s)\n" "$DISTRIB_DESCRIPTION" "$(uname -o)" "$(uname -r)" "$(uname -m)"
+          - warning: |
+              #!/bin/sh
+              printf "This is [company name] network.\n"
+              printf "Unauthorized access strictly prohibited.\n"
+
 Linux network
 -------------
 

linux/files/motd.sh

@@ -0,0 +1,8 @@
+{%- from "linux/map.jinja" import system with context -%}
+{%- for motd in system.motd -%}
+{%- if loop.index == index -%}
+{%- for name, value in motd.iteritems() -%}
+{%- if name == motd_name -%}{{ value }}{%- endif %}
+{%- endfor -%}
+{%- endif -%}
+{%- endfor -%}

linux/map.jinja

@@ -6,6 +6,7 @@
         'group': {},
         'job': {},
         'limit': {},
+        'motd': {},
         'repo': {},
         'package': {},
         'selinux': 'permissive',
@@ -18,6 +19,7 @@
         'group': {},
         'job': {},
         'limit': {},
+        'motd': {},
         'repo': {},
         'package': {},
         'selinux': 'permissive',
@@ -30,6 +32,7 @@
         'group': {},
         'job': {},
         'limit': {},
+        'motd': {},
         'repo': {},
         'package': {},
         'selinux': 'permissive',

linux/system/init.sls

@@ -48,3 +48,6 @@ include:
 {%- if system.limit|length > 0 %}
 - linux.system.limit
 {%- endif %}
+{%- if system.motd|length > 0 %}
+- linux.system.motd
+{%- endif %}

linux/system/motd.sls

@@ -0,0 +1,33 @@
+{%- from "linux/map.jinja" import system with context %}
+{%- if system.enabled %}
+
+package_update_motd:
+  pkg.installed:
+    - name: update-motd
+
+/etc/update-motd.d:
+  file.directory:
+    - clean: true
+    - require:
+      - pkg: package_update_motd
+
+{%- for motd in system.motd %}
+{%- set motd_index = loop.index %}
+
+{%- for name, value in motd.iteritems() %}
+motd_{{ motd_index }}_{{ name }}:
+  file.managed:
+    - name: /etc/update-motd.d/5{{ motd_index }}-{{ name }}
+    - source: salt://linux/files/motd.sh
+    - template: jinja
+    - mode: 755
+    - require:
+      - file: /etc/update-motd.d
+    - defaults:
+        index: {{ motd_index }}
+        motd_name: {{ name }}
+{%- endfor %}
+
+{%- endfor %}
+
+{%- endif %}