Add DHCPd on magnet lab computer

* Adjust the paths of the binaries and the names of the package to match
both Debian like and RedHat like systems
* Deactivate the validation, because it does not work on Ubuntu. See
issue #31

host_vars/las93.las.kit.edu

-ansible_user: gethmann 
+ansible_user: root 
 user_account: bernhard
 ip_suffix: 93
-loc: -10.
+loc: -119
 os: ubuntu
+computer_name: Taubenus

hosts

@@ -110,7 +110,7 @@ obelix.las.kit.edu
 # developement
 
 [lab]
-# las93.las.kit.edu
+las93.las.kit.edu
 
 [rpmbuild]
 asterix.las.kit.edu

lab.yml

+- hosts: lab
+  roles:
+      - lab

roles/common/tasks/smartd.yml

@@ -19,3 +19,15 @@
     - enable smartd
     - restart smartd
   when: (ansible_distribution == "Fedora" or ansible_distribution == "CentOS")
+
+- name: configure smartd on Ubuntu
+  become: yes
+  lineinfile:
+    line: "DEVICESCAN -H -m {{ admin_mail }} -M exec /usr/libexec/smartmontools/smartdnotify -n standby,10,q -s (S/../.././02|L/../../6/03) -W 4,35,40"
+    regexp: ^DEVICESCAN .*$
+    backup: yes
+    path: /etc/smartd.conf
+  notify:
+    - enable smartd
+    - restart smartd
+  when: (ansible_distribution == "Ubuntu")

roles/lab/files/dhcpd.conf

+# dhcpd.conf
+#
+# DHCP Server Configuration file.
+# see /usr/share/doc/dhcp/dhcpd.conf.example
+# see dhcpd.conf(5) man page
+#
+
+# option definitions common to all supported networks...
+option domain-name "maglab";
+# option domain-name-servers 129.13.64.5, 129.13.96.2;
+
+default-lease-time 600;
+max-lease-time 7200;
+
+# Use this to enble / disable dynamic dns updates globally.
+ddns-update-style none;
+
+# If this DHCP server is the official DHCP server for the local
+# network, the authoritative directive should be uncommented.
+authoritative;
+
+# Use this to send dhcp log messages to a different log file (you also
+# have to hack syslog.conf to complete the redirection).
+log-facility local7;
+
+# A slightly different configuration for an internal subnet.
+subnet 192.168.0.0 netmask 255.255.255.0 {
+  range 192.168.0.1 192.168.0.100;
+  option routers 192.168.0.10;
+  option broadcast-address 192.168.0.255;
+  option domain-name "maglab";
+#  option domain-name-servers 129.13.64.5, 129.13.96.2;
+  default-lease-time 1800;
+  max-lease-time 7200;
+  deny unknown-clients;
+}
+
+include "/etc/dhcp/host-list-maglab";

roles/lab/files/host-list-maglab

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roles/lab/handlers/main.yml

+---
+- name: enable dhcpd
+  service:
+    name: "{{ service_name }}"
+    enabled: yes
+
+- name: restart dhcpd
+  service:
+    name: "{{ service_name }}"
+    state: restarted
+
+- name: start dhcpd
+  service:
+    name: "{{ service_name }}"
+    state: started

roles/lab/tasks/main.yml

+---
+- name: Load OS dependent variables
+  include_vars: '{{ item }}'
+  with_first_found:
+    - files:
+        - 'vars/{{ ansible_os_family }}.yml'
+      skip: true
+      tags: dhcpd
+
+- name: dhcpd installed
+  become: true
+  apt:
+    name: "{{ pkg_name }}"
+    state: present
+  notify:
+    - start dhcpd
+    - enable dhcpd
+
+- name: copy mac addresses and config
+  become: true
+  copy:
+    src: "{{ item }}"
+    dest: "/etc/dhcp/{{ item }}"
+    backup: yes
+    owner: dhcpd
+    group: dhcpd
+    mode: 0644
+    decrypt: yes
+    # https://superuser.com/questions/1286948/ansible-template-validation-fails-on-isc-dhcp-server
+    # validate: "{{ bin_path }} -t -cf %s"
+  notify: restart dhcpd
+  with_items:
+    - "host-list-maglab"
+    - dhcpd.conf

roles/lab/vars/Debian.yml

+---
+service_name: isc-dhcp-server
+pkg_name: isc-dhcp-server
+bin_path: /usr/sbin/dhcpd

roles/lab/vars/RedHat.yml

+---
+service_name: dhcpd
+pkg_name: dhcpd
+bin_path: /sbin/dhcpd

roles/lab/vars/main.yml

+---

roles/mail/tasks/main.yml

@@ -7,6 +7,17 @@
   with_items:
     - ssmtp
     - mailx
+  when: (ansible_distribution == "Fedora" or ansible_distribution == "CentOS")
+
+- name: install ssmtp and mailx
+  become: yes
+  package:
+    name: "{{ item }}"
+    state: present
+  with_items:
+    - ssmtp
+    - bsd-mailx
+  when: ansible_distribution == "Ubuntu"
 
 - name: configure ssmtp user
   become: yes