Correct the ca-cert for mqtt on subunit worker

This patch fixes a mistake on my part, previously the location of
the ca certs on archlinux, but on ubuntu this isn't where they
live. So the mqtt libs can't properly encrypt the traffic and
things are getting stuck in a loop and not working. This commit fixes
this by writing the cert from instantssl/comodo to disk and then
pointing the worker at that. This way it should always work.

Change-Id: I21b1a64b457545115ff862e3c3388c5892c5497b

manifests/site.pp

@@ -488,6 +488,7 @@ node /^subunit-worker\d+\.openstack\.org$/ {
     subunit2sql_db_host   => hiera('subunit2sql_db_host', ''),
     subunit2sql_db_pass   => hiera('subunit2sql_db_password', ''),
     mqtt_pass             => hiera('mqtt_service_user_password'),
+    mqtt_ca_cert_contents => hiera('mosquitto_tls_ca_file'),
   }
 }
 

modules/openstack_project/manifests/subunit_worker.pp

@@ -19,6 +19,7 @@ class openstack_project::subunit_worker (
   $subunit2sql_db_pass,
   $mqtt_user = 'infra',
   $mqtt_pass = undef,
+  $mqtt_ca_cert_contents = undef,
 ) {
 
   file { '/etc/subunit2sql/subunit-woker.yaml':
@@ -29,6 +30,15 @@ class openstack_project::subunit_worker (
     content => template('openstack_project/logstash/jenkins-subunit-worker.yaml.erb'),
   }
 
+  file { '/etc/subunit2sql/mqtt-root-CA.pem.crt':
+      ensure  => present,
+      content => $mqtt_ca_cert_contents,
+      replace => true,
+      owner   => 'subunit',
+      group   => 'subunit',
+      mode    => '0555',
+    }
+
   include subunit2sql
   subunit2sql::worker { 'A':
     config_file => '/etc/subunit2sql/subunit-woker.yaml',

modules/openstack_project/templates/logstash/jenkins-subunit-worker.yaml.erb

@@ -6,4 +6,4 @@ mqtt-port: 8883
 mqtt-topic: gearman-subunit/<%= @hostname %>
 mqtt-user: <%= @mqtt_user %>
 mqtt-pass: <%= @mqtt_pass %>
-mqtt-ca_certs: "/etc/ca-certificates/extracted/tls-ca-bundle.pem"
+mqtt-ca_certs: /etc/subunit2sql/mqtt-root-CA.pem.crt