From: Guillaume Abrioux <gabrioux@redhat.com>
Date: Thu, 24 Nov 2016 21:46:46 +0000 (+0100)
Subject: [shrink-mon]: force playbook to fail if there is only one mon
X-Git-Tag: v2.1.0~48^2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=b2b7222b3a8e6805b1c930efe6ec17fe98159f4e;p=ceph-ansible.git

[shrink-mon]: force playbook to fail if there is only one mon

The playbook will fail if only 1 mon is in the cluster
and advise to use the `purge-cluster` playbook instead.

Fix #1083
---

diff --git a/infrastructure-playbooks/shrink-mon.yml b/infrastructure-playbooks/shrink-mon.yml
index cca6c6b45..625e80002 100644
--- a/infrastructure-playbooks/shrink-mon.yml
+++ b/infrastructure-playbooks/shrink-mon.yml
@@ -30,6 +30,12 @@
   - include_vars: roles/ceph-common/defaults/main.yml
   - include_vars: group_vars/all.yml
 
+  - name: exit playbook, if only one monitor is present in cluster
+    fail:
+      msg: "You are about to shrink the only monitor present in the cluster.
+            If you really want to do that, please use the purge-cluster playbook."
+    when: "{{ groups[mon_group_name] | length | int == 1 }}"
+
   - name: exit playbook, if user did not mean to shrink cluster
     fail:
       msg: "Exiting shrink-mon playbook, no monitor(s) was/were removed.