speed up etcd preupgrade check

roles/etcd/tasks/pre_upgrade.yml

@@ -34,6 +34,11 @@
   command: "{{ docker_bin_dir }}/docker rm -f {{item}}"
   with_items: "{{etcd_proxy_container.stdout_lines}}"
 
+- name: "Pre-upgrade | see if etcdctl is installed"
+  stat:
+    path: "{{ bin_dir }}/etcdctl"
+  register: etcdctl_installed
+
 - name: "Pre-upgrade | check if member list is non-SSL"
   command: "{{ bin_dir }}/etcdctl --no-sync --peers={{ etcd_access_addresses | regex_replace('https','http') }} member list"
   register: etcd_member_list
@@ -41,6 +46,7 @@
   delay: 3
   until: etcd_member_list.rc != 2
   run_once: true
+  when: etcdctl_installed.stat.exists
   failed_when: false
 
 - name: "Pre-upgrade | change peer names to SSL"
@@ -48,4 +54,4 @@
     {{ bin_dir }}/etcdctl --no-sync --peers={{ etcd_access_addresses | regex_replace('https','http') }} member list |
     awk -F"[: =]" '{print "{{ bin_dir }}/etcdctl --peers={{ etcd_access_addresses | regex_replace('https','http') }} member update "$1" https:"$7":"$8}' | bash
   run_once: true
-  when: 'etcd_member_list.rc == 0 and "http://" in etcd_member_list.stdout'
+  when: 'etcdctl_installed.stat.exists and etcd_member_list.rc == 0 and "http://" in etcd_member_list.stdout'