evalute etcd backup directory name only once

roles/etcd_common/tasks/backup.yml

@@ -1,4 +1,10 @@
 ---
+# set the etcd backup directory name here in case the tag or sufix consists of dynamic value that changes over time
+# e.g. openshift-backup-{{ lookup('pipe', 'date +%Y%m%d%H%M%S') }} value will change every second so if the date changes
+# right after setting l_etcd_incontainer_backup_dir and before l_etcd_backup_dir facts, the backup directory name is different
+- set_fact:
+    l_backup_dir_name: "openshift-backup-{{ r_etcd_common_backup_tag }}{{ r_etcd_common_backup_sufix_name }}"
+
 - set_fact:
     l_etcd_data_dir: "{{ etcd_data_dir }}{{ '/etcd.etcd' if r_etcd_common_etcd_runtime == 'runc' else '' }}"
 
@@ -6,10 +12,10 @@
     l_etcd_incontainer_data_dir: "{{ etcd_data_dir }}"
 
 - set_fact:
-    l_etcd_incontainer_backup_dir: "{{ l_etcd_incontainer_data_dir }}/openshift-backup-{{ r_etcd_common_backup_tag }}{{ r_etcd_common_backup_sufix_name }}"
+    l_etcd_incontainer_backup_dir: "{{ l_etcd_incontainer_data_dir }}/{{ l_backup_dir_name }}"
 
 - set_fact:
-    l_etcd_backup_dir: "{{ l_etcd_data_dir }}/openshift-backup-{{ r_etcd_common_backup_tag }}{{ r_etcd_common_backup_sufix_name }}"
+    l_etcd_backup_dir: "{{ l_etcd_data_dir }}/{{ l_backup_dir_name }}"
 
 # TODO: replace shell module with command and update later checks
 - name: Check available disk space for etcd backup