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, 16 insertions, 10 deletions

diff --git a/extraconfig/tasks/major_upgrade_controller_pacemaker_1.sh b/extraconfig/tasks/major_upgrade_controller_pacemaker_1.sh
index 6d073d86..2490ce27 100755
--- a/extraconfig/tasks/major_upgrade_controller_pacemaker_1.sh
+++ b/extraconfig/tasks/major_upgrade_controller_pacemaker_1.sh
@@ -18,6 +18,22 @@ check_disk_for_mysql_dump
 STONITH_STATE=$(pcs property show stonith-enabled | grep "stonith-enabled" | awk '{ print $2 }')
 pcs property set stonith-enabled=false
 
+# Migrate to HA NG
+if [ "$(hiera -c /etc/puppet/hiera.yaml bootstrap_nodeid)" = "$(facter hostname)" ]; then
+    migrate_full_to_ng_ha
+fi
+
+# After migrating the cluster to HA-NG the services not under pacemaker's control
+# are still up and running. We need to stop them explicitely otherwise during the yum
+# upgrade the rpm %post sections will try to do a systemctl try-restart <service>, which
+# is going to take a long time because rabbit is down. By having the service stopped
+# systemctl try-restart is a noop
+
+for $service in $(services_to_migrate); do
+    manage_systemd_service stop "${service%%-clone}"
+    check_resource_systemd "${service%%-clone}" stopped 600
+done
+
 # In case the mysql package is updated, the database on disk must be
 # upgraded as well. This typically needs to happen during major
 # version upgrades (e.g. 5.5 -> 5.6, 5.5 -> 10.1...)
@@ -36,8 +52,6 @@ if [ "$(hiera -c /etc/puppet/hiera.yaml bootstrap_nodeid)" = "$(facter hostname)
         cp -rdp /etc/my.cnf* "$MYSQL_BACKUP_DIR"
     fi
 
-    pcs resource disable httpd
-    check_resource httpd stopped 1800
     pcs resource disable redis
     check_resource redis stopped 600
     pcs resource disable rabbitmq
@@ -53,14 +67,6 @@ if [ "$(hiera -c /etc/puppet/hiera.yaml bootstrap_nodeid)" = "$(facter hostname)
     pcs cluster stop --all
 fi
 
-stop_or_disable_service mongod
-check_resource mongod stopped 600
-stop_or_disable_service memcached
-check_resource memcached stopped 600
-
-
-
-
 
 # Swift isn't controled by pacemaker
 systemctl_swift stop