The OpenEBS storage provider requires that the iSCSI client runs on all worker nodes:

1. On all your worker nodes, follow the steps to install and enable open-iscsi:

$ sudo apt-get update && sudo apt-get install open-iscsi && sudo service open-iscsi restart

2. Validate that the iSCSI service is running:

$ systemctl status iscsid
● iscsid.service - iSCSI initiator daemon (iscsid)
   Loaded: loaded (/lib/systemd/system/iscsid.service; enabled; vendor preset: enabled)
   Active: active (running) since Sun 2019-09-08 07:40:43 UTC; 7s ago
     Docs: man:iscsid(8)

3. If the service status is showing as inactive, then enable and start the iscsid service:

$ sudo systemctl enable iscsid && sudo systemctl start iscsid

After installing the iSCSI service, you are ready to install OpenEBS on your cluster.