feat: adopt cephadm (#752)

diff --git a/roles/ceph_csi_rbd/tasks/main.yml b/roles/ceph_csi_rbd/tasks/main.yml
index 6db53e0..213aee7 100644
--- a/roles/ceph_csi_rbd/tasks/main.yml
+++ b/roles/ceph_csi_rbd/tasks/main.yml
@@ -15,7 +15,7 @@
 - name: Collect "ceph mon dump" output from a monitor
   delegate_to: "{{ groups[ceph_csi_rbd_mons_group][0] }}"
   run_once: true
-  ansible.builtin.command: ceph mon dump -f json
+  ansible.builtin.command: cephadm shell -- ceph mon dump -f json
   changed_when: false
   register: _ceph_mon_dump