Run the following in separate terminals:

python3 setup_infra.py

python3 client.py

You just like regular db, you can set and get values.

This would auto update the leader upon election and can handle leader dying.

Cloudlab

Nodes:

apt166.apt.emulab.net (10.10.1.1)
apt187.apt.emulab.net (10.10.1.2)
apt184.apt.emulab.net (10.10.1.3)
apt175.apt.emulab.net (10.10.1.4)

Command support:

get x
set x y (does lock/unlock by default)
lock x (timeout = 30s)
unlock x
txn client_id; get/set/lock/unlock commands separated by ;
eg:
txn 5; lock a; get b; set a 5; unlock a;