sasl: Do not run saslauthd as root on centos/fedora/rhel

sasl/manifests/init.pp

@@ -39,6 +39,10 @@ class sasl::client {
 #
 #       For ldap authentication, see ldap::client for required global variables.
 #
+#       When using kerberos5 mech on CentOS, Fedora or RedHat system
+#       the saslauthd is ran as saslauth user and uses host/$FQDN from
+#       /etc/saslauthd.keytab for authentication.
+#
 class sasl::saslauthd {
 
     require sasl::client
@@ -55,6 +59,7 @@ class sasl::saslauthd {
                         changes => "set MECH ldap",
                         notify  => Service["saslauthd"],
                     }
+                    $user = "saslauth"
                 }
                 "openbsd": {
                     Service["saslauthd"] {
@@ -87,9 +92,12 @@ class sasl::saslauthd {
                 "centos","fedora","redhat": {
                     augeas { "set-saslauthd-mech":
                         context => "/files/etc/sysconfig/saslauthd",
-                        changes => "set MECH kerberos5",
+                        changes => [ "set MECH kerberos5",
+                                     "set KRB5_KTNAME '\"/etc/saslauthd.keytab\"'",
+                                     "set @export KRB5_KTNAME", ],
                         notify  => Service["saslauthd"],
                     }
+                    $user = "saslauth"
                 }
                 "openbsd": {
                     Service["saslauthd"] {
@@ -118,6 +126,30 @@ class sasl::saslauthd {
         }
     }
 
+    if $user {
+        case $::operatingsystem {
+            "centos","fedora","redhat": {
+                file { "/var/run/saslauthd":
+                    ensure => directory,
+                    mode   => "0755",
+                    owner  => $user,
+                    group  => $user,
+                    before => Service["saslauthd"],
+                }
+                augeas { "set-saslauthd-user":
+                    context => "/files/etc/sysconfig/saslauthd",
+                    changes => "set DAEMONOPTS '\"--user ${user}\"'",
+                    notify  => Service["saslauthd"],
+                }
+            }
+            default: {
+                fail("Running saslauthd as non root not supported on ${::operatingsystem}")
+            }
+        }
+    } else {
+        $user = "root"
+    }
+
     service { "saslauthd":
         ensure  => running,
         enable  => true,