Install custom 'snmpd.service' unit file

This file fixes issues with snmpd on hosts with LXC containers. It will
be activated automatically by systemd.

CHANGES.rst

@@ -10,3 +10,8 @@ v0.1.0
 
 - Fix wrongly named variable in ``/etc/default/snmpd``. [drybjed]
 
+- Install a custom ``snmpd.service`` unit file to replace Debian provided init
+  script, which causes issues with ``snmpd`` daemon on hosts with LXC
+  containers. This unit file will be automatically activated on hosts with
+  ``systemd`` enabled. [drybjed]
+

files/etc/systemd/system/snmpd.service

@@ -0,0 +1,25 @@
+# snmpd.service unit file
+# Copyright (C) Maciej Delmanowski <[email protected]>
+# Homepage: http://debops.org/
+
+# This unit file fixes issues with snmpd service running inside LXC containers
+# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=727105
+# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=718702
+
+[Unit]
+Description=Simple Network Management Protocol (SNMP) Daemon
+Documentation=man:snmpd(8)
+Documentation=man:snmpcmd(1)
+After=network.target
+
+[Service]
+Environment="MIBDIRS=/usr/share/snmp/mibs:/usr/share/mibs/iana:/usr/share/mibs/ietf"
+EnvironmentFile=-/etc/default/snmpd
+PIDFile=/run/snmpd.pid
+TimeoutStartSec=0
+ExecStart=/usr/sbin/snmpd $SNMPDOPTS -f
+
+[Install]
+WantedBy=multi-user.target
+WantedBy=lldpd.service
+

handlers/main.yml

@@ -3,6 +3,7 @@
 - name: Restart snmpd
   service:
     name: 'snmpd'
+    enabled: True
     state: 'restarted'
 
 - name: Restart lldpd

tasks/main.yml

@@ -28,6 +28,15 @@
   with_flattened:
     - [ '{{ "lldpd" if not snmpd_lldpd else [] }}' ]
 
+- name: Install custom snmpd.service unit file
+  copy:
+    src: 'etc/systemd/system/snmpd.service'
+    dest: '/etc/systemd/system/snmpd.service'
+    owner: 'root'
+    group: 'root'
+    mode: '0644'
+  notify: [ 'Restart snmpd' ]
+
 - name: Enable MIBs support
   lineinfile:
     dest: '/etc/snmp/snmp.conf'