Add a function to upgrade from full HA to NG HA

This is the initial work to have a function that migrates a full HA
architecture as deployed in Mitaka to the HA architecture as deployed in
Newton where only a few resources are managed by pacemaker.

The sequence is the following:
1) We remove the desired services from pacemaker's control. The services
   at this point are still running normally via the systemd service as
   invoked by pacemaker
2) We do a "systemctl stop <service>" on all controllers for all the
   services that were removed from pacemaker's control. We do this to make
   sure that during the yum upgrade, the %post sections that call
   "systemctl try-restart" do not take ages, because at this point during
   the upgrade rabbit is down. The only exceptions are "openstack-core"
   and "delay" which are dummy pacemaker resources that do not exist on
   the system
3) We do a "systemctl start <service>" on all nodes for all the services
   mentioned above.

We should probably merge this patch only when newton has branched as it
is very specific to the M/N upgrade.

Closes-Bug: 1617520
Change-Id: I4c409ce58c1a57b6e0decc3cf168b62698b32e39

1 files changed, 8 insertions, 6 deletions

diff --git a/extraconfig/tasks/major_upgrade_controller_pacemaker_2.sh b/extraconfig/tasks/major_upgrade_controller_pacemaker_2.sh
index cfe5bcfe..6bb2fa73 100755
--- a/extraconfig/tasks/major_upgrade_controller_pacemaker_2.sh
+++ b/extraconfig/tasks/major_upgrade_controller_pacemaker_2.sh
@@ -32,8 +32,6 @@ fi
 
 start_or_enable_service galera
 check_resource galera started 600
-start_or_enable_service mongod
-check_resource mongod started 600
 
 if [[ -n $(is_bootstrap_node) ]]; then
     tstart=$(date +%s)
@@ -59,14 +57,18 @@ if [[ -n $(is_bootstrap_node) ]]; then
     # sahara-db-manage --config-file /etc/sahara/sahara.conf upgrade head
 fi
 
-start_or_enable_service memcached
-check_resource memcached started 600
 start_or_enable_service rabbitmq
 check_resource rabbitmq started 600
 start_or_enable_service redis
 check_resource redis started 600
-start_or_enable_service httpd
-check_resource httpd started 1800
 
 # Swift isn't controled by pacemaker
 systemctl_swift start
+
+# We need to start the systemd services we explicitely stopped at step _1.sh
+# FIXME: Should we let puppet during the convergence step do the service enabling or
+# should we add it here?
+for $service in $(services_to_migrate); do
+    manage_systemd_service stop "${service%%-clone}"
+    check_resource_systemd "${service%%-clone}" started 600
+done