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Steps
Portworx Cluster Installation on Docker
Install a Single Node ETCD
An ETCD instance has already been created for you on the master node
Inspect the ETCD container on master.
Name of the docker container is 'etcd', exposed on host port '4001'. Make a note of the the IP and port for the subsequent steps.
export IP=$(hostname -I | awk '{print $1}')
echo $IP
docker ps --filter name=etcd