etcd service not started when external storage is attached

etcd service is not started when charm-etcd is deployed with external storage.

Error message in snap.etcd.etcd.service =>
error listing data dir: /media/etcd/data

Steps to reproduce:
juju create-storage-pool osfast cinder
juju add-machine -n 3 --constraints="cores=2 mem=4G root-disk=20G"
juju deploy etcd -n 3 --to 0,1,2 --storage data=osfast,1G
juju deploy cs:~containers/easyrsa
juju add-relation etcd easyrsa

This will leave the etcd units in the following state:

etcd/0 waiting idle 0 10.5.1.106 Waiting to retry etcd registration
etcd/1* active idle 1 10.5.0.85 2379/tcp Errored with 0 known peers
etcd/2 waiting idle 2 10.5.0.111 Waiting to retry etcd registration

On investigation, found the following on dmesg
[ 1535.526364] audit: type=1400 audit(1644396267.071:161): apparmor="DENIED" operation="open" profile="snap.etcd.etcd" name="/media/etcd/data/" pid=37014 comm="etcd" requested_mask="r" denied_mask="r" fsuid=0 ouid=0

Seems the removable-media interface is not connected for etcd snap
$ sudo snap connections etcd
Interface Plug Slot Notes
home etcd:home :home -
network-bind etcd:network-bind :network-bind -
removable-media etcd:removable-media - -

Manually connecting removable-media for etcd snap resolved the problem.
On each etcd unit, ran the following command
sudo snap connect etcd:removable-media :removable-media