Fix configuration of cluster network

Fixes #139.

Author: priteau

roles/cephadm/tasks/bootstrap.yml

@@ -17,6 +17,9 @@
          {{ firewalld }}
          --ssh-private-key={{ cephadm_ssh_private_key }}
          --ssh-public-key={{ cephadm_ssh_public_key }}
+         {% if cephadm_cluster_network | length > 0 %}
+         --cluster-network {{ cephadm_cluster_network }}
+         {% endif %}
          {% if cephadm_ssh_user | length > 0 %}
          --ssh-user "{{ cephadm_ssh_user }}"
          {% endif %}
@@ -43,7 +46,7 @@
 
 - name: Set cluster network
   command:
-    cmd: "cephadm shell -- ceph config set mon cluster_network {{ cephadm_cluster_network }}"
+    cmd: "cephadm shell -- ceph config set global cluster_network {{ cephadm_cluster_network }}"
   when: cephadm_cluster_network | length > 0
   become: true
   changed_when: true