Make the openvswitch 2.4->2.5 upgrade more robust

In I9b1f0eaa0d36a28e20b507bec6a4e9b3af1781ae and
I11fcf688982ceda5eef7afc8904afae44300c2d9 we added a manual step
for upgrading openvswitch in order to specify the --nopostun
as discussed in the bug below.

This change adds a minor update to make this workaround more
robust. It removes any existing rpms that may be around from
an earlier run, and also checks that the rpms installed are
at least newer than the version we are on.

This also refactors the code into a common definition in the
pacemaker_common_functions.sh which is included even for the
heredocs generating upgrade scripts during init. Thanks
Sofer Athlan-Guyot and Jirka Stransky for help with that.

Change-Id: Idc863de7b5a8c116c990ee8c1472cfe377836d37
Related-Bug: 1635205

1 files changed, 24 insertions, 0 deletions

diff --git a/extraconfig/tasks/pacemaker_common_functions.sh b/extraconfig/tasks/pacemaker_common_functions.sh
index 2c7dfc35..aae4a2de 100755
--- a/extraconfig/tasks/pacemaker_common_functions.sh
+++ b/extraconfig/tasks/pacemaker_common_functions.sh
@@ -297,3 +297,27 @@ function systemctl_swift {
         manage_systemd_service $action $service
     done
 }
+
+# Special-case OVS for https://bugs.launchpad.net/tripleo/+bug/1635205
+function special_case_ovs_upgrade_if_needed {
+    if [[ -n $(rpm -q --scripts openvswitch | awk '/postuninstall/,/*/' | grep "systemctl.*try-restart") ]]; then
+        echo "Manual upgrade of openvswitch - restart in postun detected"
+        rm -rf OVS_UPGRADE
+        mkdir OVS_UPGRADE && pushd OVS_UPGRADE
+        echo "Attempting to downloading latest openvswitch with yumdownloader"
+        yumdownloader --resolve openvswitch
+        for pkg in $(ls -1 *.rpm);  do
+            if rpm -U --test $pkg 2>&1 | grep "already installed" ; then
+                echo "Looks like newer version of $pkg is already installed, skipping"
+            else
+                echo "Updating $pkg with nopostun option"
+                rpm -U --replacepkgs --nopostun $pkg
+            fi
+        done
+        popd
+    else
+        echo "Skipping manual upgrade of openvswitch - no restart in postun detected"
+    fi
+
+}
+