Add chrony support to validations

If ntpdate is not available, use chrony as that is a default package
shipped since CentOS7.

Change-Id: I6155508b491623de1370b9e78907bc36523409b5
Related-Blueprint: tripleo-chrony

validation-scripts/all-nodes.sh

@@ -83,6 +83,16 @@ function fqdn_check() {
   echo "SUCCESS"
 }
 
+# run chrony/ntpdate as available
+function _run_ntp_sync() {
+  local NTP_SERVER=$1
+  if ! type ntpdate 2>/dev/null; then
+    chronyd -Q "server $NTP_SERVER iburst"
+  else
+    ntpdate -qud $NTP_SERVER
+  fi
+}
+
 # Verify at least one time source is available.
 function ntp_check() {
   NTP_SERVERS=$(hiera ntp::servers nil |tr -d '[],"')
@@ -91,7 +101,7 @@ function ntp_check() {
     NTP_SUCCESS=0
     for NTP_SERVER in $NTP_SERVERS; do
       set +e
-      NTPDATE_OUT=$(ntpdate -qud $NTP_SERVER 2>&1)
+      NTPDATE_OUT=$(_run_ntp_sync $NTP_SERVER 2>&1)
       NTPDATE_EXIT=$?
       set -e
       if [[ "$NTPDATE_EXIT" == "0" ]];then