fail2ban: implement initial filter/action setup for redmine

manifests/fail2ban.pp

@@ -0,0 +1,55 @@
+# == Define: redmine::fail2ban
+#
+# Fail2ban configuration for redmine. NOTE: name of the resource is
+# restricted to 29 - len(fail2ban-rm-) characters => 17
+# characters. This is due to a limit on iptable chain names.
+#
+# === Parameters
+#
+# [*root_dir*]
+#   root directory
+# [*ports*]
+#    optional port list - defaults to standard http and https
+# [*bantime*]
+#    see fail2ban::jail
+# [*maxretry*]
+#    see fail2ban::jail
+#
+# === Examples
+#
+# redmine::fail2ban { 'redmine.example':
+#   root_dir => '/srv/www/redmine.example.net',
+# }
+#
+# === Authors
+#
+# Braiins Systems s.r.o.
+#
+# === Copyright
+#
+# Copyright 2015 Braiins Systems s.r.o.
+#
+define redmine::fail2ban(
+  $port=['80', '443'],
+  $bantime=15,
+  $maxretry=3,
+  $serveraliases=[],
+  $root_dir,
+) {
+  $fail2ban_name = "rm-${title}"
+  # Check the supplied title to prevent exceeding the iptables chain name limit
+  if size($title) > 17 {
+    fail("redmine::fail2ban - title '${title}' longer than 17 characters, iptables chain name: '${fail2ban_name}' would exceed iptables limit, make the resource name shorter!")
+  }
+  fail2ban::filter { $fail2ban_name:
+    filterfailregex => 'Failed login for \'.*\' from <HOST> .*$',
+  } ->
+  # The jail uses the default iptables multiport ban action
+  fail2ban::jail { $fail2ban_name:
+    logpath  => "${root_dir}/current/log/production.log",
+    bantime  => $bantime,
+    maxretry => $maxretry,
+    port     => $port,
+    filter   => $fail2ban_name,
+  }
+}